A basic definition for BLDC motor products is an automatic machine that uses error-correction rountine to correct the motion of the BLDC motor. The general term BLDC can be applied to systems other than a BLDC motor that use a feedback mechanism such as an encoder or other feedback device to control the motion parameters. Typically when the term BLDC is used it applies to a 'BLDC motor' but this term is also used as a standard control term with the meaning of a feedback loop to position whatever the product is including a BLDC motor.

BLDC motor products differ from other controlled motors because it's controlled by a time-based derivative commonly referred to as the PID loop. A BLDC motor that is used to control position must be capable of changing the velocity of the output shaft because the time-based derivative, or the rate of change of position, is velocity.

In todays world the BLDC Motor is utilized in various applications in different industries for motion control. For example some of many uses are Automotive, CNC, Instrumentation, Aerospace, Applicances, Medical, Semiconductor, Consumer, and Packaging Equipment.

The Stator
The stator of a BLDC Motor is similar to an AC motor but the windings are different. The stator of a BLDC Motor has stacked steel laminations, and the windings are inserted in the slots that are cut inside the laminations. There are three stator windings in each BLDC Motor connected in either a Delta or star configuration. Each of these windings there are multiple coils that are constructed to connect together to form a winding. There are generally a even number of polls in the BLDC Motor products. Anaheim Automation typically constructs them with six coils per BLDC Motor, which are made into a three-phase winding.

Mainly there two forms of stator windings, sinusoidal and trapezoidal. The difference in the stator windings is identified in the interconnection of the coils of the stator windings. Which result in a different type of back EMF the trapezoidal variant delivers its back EMF in shape of a trapezoid. Each sinusoidal variation gives its BLDC Motor a back EMF that matches with the current. The faulted also is used as the shape of the sinusoid and a trapezoid. The major difference between the two BLDC Motor products is the smoother output torque that you recieve from the sinusoidal BLDC Motor than the trapezoidal BLDC Motor. The stator will winding can be wound for multiple folk voltages. This can be customized for almost any distinct applications are speed and torque requirements.

The Rotor
The rotor is made up of permanent magnets and normally have between two and eight poles the magnets are bonded onto the rotor core in switching north and south pole fields. Ferrite magnets are normally used to make the permanent magnet rotor. For higher power density applications, rare earth magnets are being used more frequently then ferrite magnets that are less expensive, but have lower flux density when compared to the rare earth magnets. The price of the rare earth magnets are coming down, giving the manufacturers an advantage to put in a higher power density to allow the BLDC Motor to put out more torque in a smaller volume.

Rare earth magnet types:
Neodymium (Nd)
Samarium Cobalt (SmCo)
The alloy of Neodymium, Ferrite, and Boron (NdFeB)

Anaheim Automation supplies many different accessories for our BLDC motor. These accessories include an encoder, driver, brake, connector, and a cable.

Because of the BLDC Motor brake is a 24vdc system, it is perfect for any holding application. They are offered on any Anaheim Automation BLDC motor, and are already attached to the rear of the BLDC motor. The BLDC motor brakes have a low voltage design for applications that are susceptible to weak batter, brown out, or long wiring runs. When implementing an electric force to the BLDC Motor brake the armature is drawn by the electromagnet force in the magnet body assembly, overcoming the spring action. By overcoming the spring action the friction disc will rotate freely. Interrupting the electrical power will occur because the electromagnetic force was removed and the pressure spring mechanically causes the armature plate to clamp the friction disc between itself and the pressure plate.

BLDC motor cables can be made with the supplied BLDC motor connector, or can be obtained from Anaheim Automation.

Many BLDC Motor designs today are being made with the housing less design. In this design the laminations are exposed and are sprayed with a paint to prevent the laminations from rusting. Then there are some BLDC Motor designs that are still being manufactured in a housed extrusion or aluminum or steel cylindrical housing where the laminations of the stator are inserted and secured inside.

The feedback for a BLDC Motor is carried out by the use of Hall sensors when rotating the BLDC Motor in the stator windings need to be energized sequentially. In order to understand the next winding that would need to be energized in the proper sequence, the controller needs to know the rotor position. The BLDC Motor utilizes three Hall sensors, and these Hall sensors that are embedded in the back end cap of the BLDC Motor housing sense the rotor position. They are separated by either 60° or 120°. Hall sensors sense either the rotor magnet or external magnet placed in the back of the shaft, and sends off a signal signifying whether or not a North or South Pole passes the censors. Using each signal from the sensors, the BLDC Motor controller can easily maintain the BLDC Motor velocity. Each Hall sensor normally mounted on a PC board and fastened to the back end cap on the non-driving end of the BLDC Motor.

For low-speed applications it is highly recommended to use an encoder for the feedback rather than the Hall sensors. The Hall sensor counts per revolution can only be as great as a number of polls times the quantity of Hall Sensors. The high count that is calculated by the BLDC Motor controller can be used to its advantage when operating a BLDC Motor. The BLDC Motor controller can more precisely control the velocity by utilizing the additional information from the BLDC Motor. The higher the resolution on the encoder to more finely the BLDC Motor controller can control the BLDC Motor. Even though the expense is much greater for encoders when compared to Hall sensors this price can be justified as it can result in very precise control for a much lower cost than alternative technologies such as Servo motors were AC motors or synchronous motors.

The following environmental and safety criteria must be observed during all phases of operation, repair and service of a BLDC motor system. Failing to comply with these precautions violates safety criteria of design, manufacture and intended use of the BLDC motor and controller. Please note that even well-built BLDC motor products operated and installed incorrectly, could be hazardous. Precaution must be observed by the user with respect to the load and operating environment. The customer is ultimately responsible for the proper selection, installation, and operation of the BLDC motor system.

The atmosphere in which a BLDC motor is used must be conducive to good standard practices of electrical/electronic equipment. Do not operate the BLDC motor in the presence of flammable gases, dust, oil, vapor or moisture. For outdoor use, the BLDC motor and controller must be protected from the elements by an adequate cover, while still providing adequate air flow and cooling. Moisture may cause an electrical shock hazard and/or induce system breakdown. Due consideration should be given to the avoidance of liquids and vapors of any kind. Contact the factory should your application require specific IP ratings. It is prudent to install the BLDC motor and controller in an environment which is free from electrical noise, shock, condensation, and vibration.

Furthermore, it is more suitable to work with the BLDC motor and controller system in a non-static protective environment. Uncovered circuitry should always be properly guarded and/or enclosed to prevent unauthorized human exposure with live circuitry. No work should be performed while power is applied. Don't plug in or unplug the connectors when power is ON. Wait for at least 5 minutes before doing examination work on the BLDC motor system when turning power OFF, because even after the power is turned off, there will still be some electrical energy remaining in the capacitors of the internal circuit of the BLDC motor controller.

Plan the installation of the BLDC motor and controller in a system design that is free from debris, such as metal debris from tapping, welding, drilling, and cutting, or any other foreign material that could come in contact with circuitry. Failing to prevent debris from entering the BLDC motor system can result in damage and/or shock.

The standard information provided in the following paragraphs is designed to be a guideline for wiring the Anaheim Automation BLDC Motor products. Be aware that when you route power and signal wiring on a machine or system, radiated noise from the nearby relays, transformers, and other electronic devices can be inducted into the BLDC Motor and encoder signals, input/output communications, and other sensitive low voltage signals. This can cause systems faults and communication errors.

WARNING - Dangerous voltages capable of causing injury or death, may be present in the BLDC motor system. Use extreme caution when testing, handling, adjusting, and wiring during tuning, set-up, installation, and operation. To refrain from mechanical vibration that can lead to failure and/or loss, don't make extreme changes or adjustments to the BLDC Motor system parameters. Once the BLDC Motor is wired, do not run the BLDC motor controller by switching On/Off the power supply directly. Frequent power On/Off switching will cause fast aging of the internal components, which will reduce the lifetime of BLDC motor system.

Strictly comply with the following rules:
- Abide by the Wiring Diagram with each BLDC motor
- Direct high-voltage power cables separately from low-voltage power cables.
- Segregate input power wiring and BLDC motor power cables from control wiring and BLDC motor feedback cables as they leave the BLDC motor controller. Maintain this separation throughout the wire run.
- Use shielded cable for power wiring and provide a grounded 360 degree clamp termination to the enclosure wall. Allow room on the sub-panel for wire bends.
- Make all cable routes as short as possible.
NOTE: Factory made cables are suggested for use in our BLDC Motor and driver systems. These cables are purchased separately, and are designed to minimize EMI. These cables are recommended over customer-built cables to optimize system performance and to produce additional safety for the BLDC Motor system and the user.

WARNING - To avoid the risk of electrical shock, perform all mounting and wiring of the BLDC Motor and controller system prior to applying power. Once power is applied, connection terminals may have voltage present.

The information in the following paragraphs is a general guideline for installation and mounting the BLDC Motor system properly. WARNING - When voltages reach dangerous levels the BLDC Motor system is capable of causing injury or death.. Use extreme caution when handling, testing, and adjusting during installation, set-up, and operation. During the installation and mounting process it is very important that the wiring of the BLDC Motor and controller be taken into consideration.

Subpanels installed inside of the enclosure for mounting BLDC motor system components, must be a flat, rigid surface that will be free from shock, vibration, moisture, oil, vapors, or dust. Heat dissipation should also be taken into account in the design layout because the BLDC Motor and controller will produce heat during work. Size the enclosure so as not to exceed the maximum ambient temperature rating. It is suggested that the BLDC motor controller be mounted in position as to provide sufficient airflow. The BLDC motor ought to be mounted in a stable fashion, secured tightly. NOTE: There must be a minimum of 10mm between the BLDC motor controller and any other devices mounted in the system/electric panel or cabinet.

NOTE: in order to comply with UL and CE conditions, the BLDC motor system must be grounded in a grounded conducive enclosure offering protection as defined in standard EN 60529 (IEC 529) to IP55 such that they are not accessible to the operator or unskilled person. As with any moving part in a system, the BLDC motor should be kept out of the reach of the operator. A NEMA 4X enclosure exceeds those requirements supplying protection to IP66. To improve the bond between the power rail and the subpanel, construct your subpanel out of zinc-plated (paint-free) steel. In addition, it is strongly recommended that the BLDC motor controller be protected against electrical noise interferences. Noise from signal wires can cause mechanical vibration and malfunctions.

The establishment of Anaheim Automation as a manufacturer of "turkey" motion control systems took place in 1966. Our emphasis on R&D has insured the continued production of high tech BLDC Motor driver/controller, such as the BLDC Motor product line. As many other products Anaheim Automation supplies alongside with the BLDC Motor product line, Anaheim Automation ranks high among the leading distributor and manufacturers of motion control products, and given a high ranking for its excellent name for quality products at competitive prices.

There is a wide variety of standard BLDC Motor products offered at Anaheim Automation. Occasionally, OEM customers with mid to large quantity demands prefer to have a BLDC motor that is custom or modified to meet their specific design requirements. Sometimes the customization to the BLDC Motor is as simple as an oil seal for an IP65 rating, wire colors, label, shaft modification, mounting dimensions, or brake. The customization can also be as complex as making adjustments to the torque, speed and/or voltage. Buyers appreciate Anaheim Automations simplicity of "one-stop shop” and the cost savings of a BLDC Motor custom design while engineers appreciate the creativity, system efficiency, and flexibility that Anaheim Automation offers for their BLDC Motor product line.

Anaheim Automation's standard BLDC Motor product line is known for its rugged construction and excellent performance and is very cost-effective. A considerable size of its sales growth has resulted from committed engineering, friendly customer service and professional application assistance, often surpassing the customer's expectations for fulfilling their custom requirements. While a good portion of Anaheim Automation's BLDC motor sales involves special, custom, or private-labeling requirements, the company takes pride in its standard stock base located in Anaheim, California, USA. To make customization of a BLDC motor affordable, a minimum quantity and/or a Non-Recurring Engineering (NRE) fee is required. Contact the factory for specifics, should you require a custom BLDC motor in your design.

A NCNR Agreement must be signed customer per each request, and all sales for a customized or modified BLDC Motor are Non-Cancelable-Non-Returnable. All Sales, which include a customized BLDC motor, are made pursuant to Anaheim Automation's standardized Terms and Conditions, and are in lieu of any other expressed or implied terms, including but not limited to any implied warranties. Anaheim Automation has a wide range of customers for the BLDC Motor product line: companies running or developing automated machinery or processes that involve food, medical packaging, special filming and projection effects, inspection and security devices, assembly, labeling or tamper-evident requirements, cosmetics, medical diagnostics, conveyor, pump flow control, robotics, equipment upgrades, and metal fabrication (CNC machinery). We often put a "private-label" for many OEM customers that request it so their customers stay loyal to them for replacement, servicing, and repairs.

PLEASE NOTE: Technical assistance regarding its BLDC motor product line, as well as all the products manufactured or distributed by Anaheim Automation, is offered at no charge. This will help Anaheim Automation's customers choose the right product for a specific application. However, any application, selection, or quotation recommendation given by Anaheim Automation's staff for a BLDC Motor, or any other product, its' distributors or representatives can only to assist the customer. In all cases, determination of fitness of the custom BLDC motor in a specific system design is solely the customers' responsibility. While every effort is made to offer solid advice regarding the BLDC motor product line, as well as other motion control products, and to produce technical data and illustrations accurately, such advice and documents are for reference only, and subject to change without notice.

All BLDC Motor Products are permanent magnet motors. There are also two basic types labeled as a Trapezoidal Motor and the other as a Sine Wave Motor. The Trapezoidal Motor is said to be a DC servo motor and the Sine Wave Motor has close resemblance to an AC synchronous motor.

It is said that BLDC Motor motors have been in commercial use and possible since 1962, although the first BLDC Motor motor appeared during the 1800s. This was made possible by the conversion of electrical energy into mechanical energy by electromagnetic means, which was demonstrated by a British scientist by the name of Michael Farady in 1821. A Hungarian physicist by the name of Ányos Jedlik began experimenting with devices he called electromagnetic self-rotors in 1827. At the time, they were only used for instructional purposes. In 1828, he demonstrated the first device to contain the three main components of practical direct current motors; the rotor, commutator, and stator. The magnetic fields of both the revolving and stationary components were produced solely by currents flowing through their windings and the motors did not contain permanent magnets in those times. In 1832, William Sturgeon, also a British scientist invented the first commutator-type direct current electric motor capable of turning machinery.

Americans, Thomas and Emily Davenport built a commutator-type direct current electric motor with the intention of commercial use in following Sturgeon’s work and patented in 1837. The motors were used for a printing press and powered machine tools. They were said to have ran up to 600 revolutions per minute (RPM). The motors were commercially unsuccessful due to the high costs of the primary battery power, also there was no practical commercial market for the motors at that time.

A modern BLDC motor was accidently invented in 1873, when a dynamo was to a similar motor driving it as a motor by Zénobe Gramme. He then created the Gramme Machine, it was the first electric motor that was successful in the industry. A non-sparking motor capable of constant speed under variable loads was the first practical BLDC motor was invented in 1886 by Frank Julian Sprague.

Most BLDC Motor Products need a controller/driver to run. There are many different types of controllers/drivers that are manufactured around the world for different applications. Many come with different options and can be custom made. Most are referred to as Electronic Speed Controller (ESC).

In a BLDC Motor Controller/Driver, either a Hall Effect Sensor or the Back EMF (Electromotive Force) is used to run the motor. The Hall Effect uses three hall sensors within the motor to help detect the position of the rotor. This method is primarily used in speed detection, positioning, current sensing, as well as proximity switching. The magnetic field changes in response to the transducer that varies its output voltage. A feedback is created by directly returning a voltage since the sensor operates as an analogue transducer. The distance between the Hall plate and a known magnetic field can be determined with a group of sensors, in this case, three, and the relative position of the magnet can be deduced. A Hall sensor can act as an on/off switch in a digital mode when combined with circuitry.

The Back EMF, also known as the Counter-Electromotive Force is caused by a changing electromagnetic field. In a BLDC Motor, the back EMF is a voltage that occurs where there is motion between the external magnetic field and the armature of the motor. In other words, the voltage is developed in an inductor by and alternating current or pulsating current. At every moment, the polarity of the voltage is the reverse of the input voltage. This method is commonly used to measure the motor’s position and speed indirectly.

BLDC Motor Products have and continue to rise in popularity for many different applications. Although, A BLDC Motor may cost a little more than DC Brushed Motors, they have far more advantages than disadvantages. Many industries have turned to BLDC Motor motors for their applications. For specific Industries, please check the “What Industries are BLDC Motor Products used in” section.

The key dissimilarity between bldc motor products and their predecessors is the process of commutation. Newer BLDC motor products are electrically commutated; this is accomplished with Hall elements, by counter EMF, or encoder feedback.

Factors That Affect BLDC Motor Life

Bearing failure is a major factor when it comes to BLDC motor products failing. As a result of using industrial grade components, some BLDC motor products have the ability to last lifetimes in excess of 20,000 hours or more. Integrated into these systems are permanently lubricated ball bearings that use special grease, thus eliminating the need for re-lubrication. Non-approved lubricants are not recommended for the motor components because they could potentially shorten the life of the BLDC motor.

Temperature also plays a key role in the lifespan of a BLDC motor. The motor casing in particular must ensure that the heat generated in the motor windings must be dispelled. The motor may face severe damage if it exceeds the specification regarding heat. The motor's performance has a direct correlation with the maximum possible rotor temperature, ambient temperature, and duty cycle. As temperature increases, the winding resistance increases, and magnetic forces decrease, ultimately causing performance to dwindle. When running at high continuous loads, all of these factors must be taken into consideration. Heat sinking and forced air-cooling can considerably lower operating temperatures.

BLDC Motor Products are quickly growing in popularity and are being used in many industries. Some of the industries are:

• Instrumentation
• Medical
• Appliances
• Consumer
• Automotive
• Industrial Automatio Equipment
• Aerospace
• Military

A BLDC Motor varies in price. It can be anywhere from twenty dollars or less to several hundred dollars, possibly more. It just depends on the size and capabilities of the brushless dc motor itself.

A BLDC motor has an electronic commutation system, no brushes and no mechanical commutators. This allows the BLDC Motor to operate at higher speeds. There can be a different amount of poles on the stator for each motor.

The BLDC Motor has the physical appearance of a 3-phase permanent magnet that is stationary which is located on the outside, which is known as the Stator. The rotating armature is located inside and is also called the rotor. BLDC Motors can be constructed in many different physical configurations. One configuration is known as the “Inrunner” type where the permanent magnets are a part of the rotor and three stator windings are surround the rotor. Another configuration is the “Outrunner” type, where the radial-relationship between the coils and magnets is reversed. The stator coils form the core of the motor, while permanent magnets spin within an overhanging rotor surrounding the core.

When selecting a BLDC Motor , you want to ask yourself a few questions. Such as, what is my application? What are my specifications? How much do I want to spend? What controller/driver and I going to use/need? These are some of the questions you want to think about to narrow down your selection. You will definitely want to do your research.

The type of application will need to be determined for your BLDC Motor. You will then need to determine all specifications, known ones along with possible ones. For example, do you need a specific frame size, weight, power, speed, length, etc. Once you have determined all those things, you will need to take into consideration on what controller/driver you will be using. This goes hand in hand with the selection of the motor. Keep in mind there are many different motors and driver/controllers to choose from, therefore it is wise to do detailed research.

A Brushless DC motor is also known as a BLDC Motor; synchronous electric motors that are DC (Direct Current) powered. They are electronically commutated without brushes making them “Brushless”. A BLDC Motor consists of a fixed armature along with permanent magnets that rotate, hall sensors, stator windings, rotor magnet North and South, hall sensor magnets, an accessory shaft, and a driving end of the shaft.

The BLDC Motor has become popular amongst the medical industry for its long-lasting design. Used in medical equipment, a BLDC motor has a life expectancy of 10,000 hours, versus the 2,000-5,000 hour lifespan of the brushed motor. The BLDC motor also has a top speed that is not limited by a large number of poles. It wasn't until the cost of these BLDC motors decreased, that they became a viable option for most medical applications. A BLDC motor can provide a more efficient, reliable, and compact motor that can be used in a variety of ways.

Basically, a BLDC motor is a synchronous electric motor that is powered by a DC power source. An electric commutation circuit replaces the standard commutator and brush assembly found in the brushed DC motor. A BLDC motor and a brushed DC motor are essentially polar opposites. While the windings of a brushed motor rotate around the rotating shaft or armature, the BLDC motor has windings that are attached to the motor housing. The magnets of the brushed DC motor attach to the motor housing, while the BLDC motor magnets are affixed to the rotor.

Commutation is the process of reversing the polarity of the phase currents in the windings of the motor at an exact time that will produce continuous rotational torque. If commutation did not occur, the magnets and magnetic fields would lock the rotating shaft in place by aligning themselves. The appropriate reversal time is crucial; the BLDC motor shaft must continue spinning, and it does so as a result of the changing polarity of the windings.

The primary way a BLDC motor and a brushed DC motor differs is in their methods of commutation. Brushed DC motors use brushes and a commutator that acts as an electromechanical switch to connect the windings in the proper polarity. In the BLDC motor, electronic switches take the place of the mechanical switch, controlling the timing of the polarity-reversal by an electrical circuit. Usually, a BLDC motor senses rotor position and controls the electronic drive of the motor by using Hall-effect devices (HFD). However, because of the ability to monitor motor back-EMF, HFD can be eliminated to create a sensorless BLDC motor drive. These motors are far less expensive, and are a primary reason they appeal in medical equipment design.

Sleep Apnea can also be treated with the help of a BLDC motor. Treatment for the disorder requires the use of Positive Airway Pressure (PAP) respirators. The PAP respirator is attached to a special breathing mask that the patient must wear to breathe through while sleeping. Within the respirator is a blower fan that pressurizes the air mask, according to the patient's breathing pattern. As the patient inhales, the blower fan speeds up, allowing more air to reach the lungs. Oppositely, when the patient exhales, the blower fan slows down to reduce the amount of air the patient breathes out. A BLDC motor never needs to operate underneath the minimum threshold speed of the drive, so they are the perfect power source for blower fans. Furthermore, there is no risk for any sudden changes in load.

Low-noise-level standards force hospital equipment to be as quiet as possible, thus making the BLDC motor a prime candidate due to how silent they are in operation. The BLDC motor can operate at high speeds with accuracy, and yet maintain a silent sound. Therefore, they can be used both in hospitals, and in the patient's home. It is the absence of a commutator and brushes in the BLDC motor that removes even more of the motor noise.

Consumer Electronics Although a BLDC motor may perform the same functions originally fulfilled by brushed DC motors, cost and control complications prevent a BLDC motor from completely replacing brushed motors. However, BLDC the motor has monopolized many areas of the consumer electronics industry, and are used in many different locations, including computer hard drives and CD/DVD players. A BLDC motor is used to operate the small cooling fans that are located in electronic equipment as well. Cordless power tools also utilize a BLDC motor because the need for increased efficiency of the BLDC motor allows for long periods of use before needing to recharge the battery. Furthermore, direct-drive turntables for ?analog? audio disks use a low-speed, low-power BLDC motor.

Transport Electric and hybrid vehicles use a high power BLDC motor that are essentially AC synchronous with permanent magnet rotors. A BLDC motor is used in Segway and Vectrix-Maxi-Scooters also. Electric bicycles sometimes build a BLDC motor into their wheel hubs, with the stator solidly fixed to the axle and magnets attached to and rotating with the wheel. These electric bicycles have a standard bicycle transmission with pedals, sprockets, and chain that, if needed, can be pedaled along with or without the use of the BLDC motor.

Heating and Ventilation It has become a popular trend to switch from AC motors to a BLDC motor (EC) because of the dramatic reduction in power needed o run them, versus the typical AC motor. Although shaded-pole and permanent split capacitor motors were the primary fan motor of choice, many fans today are being run by a BLDC motor. Some use a BLDC motor simply to increase system efficiency as a whole. Certain HVAC systems use ECM motors (electronically commutated BLDC motors). Particularly these are the HVAC systems that feature load modulation and/or variable-speed. A BLDC motor does not only have higher efficiency, but also a built-in microprocessor that allows for better airflow control, programmability, and serial communication.

Model Engineering and Hobbyists The most popular motor choice for model aircraft today is the BLDC motor. The BLDC motor is available in a wide array of sizes, and have a favorable power to weight ratios. A BLDC motor has transformed the market of electric-powered flight. The introduction of the BLDC motor has displaced the use of almost all brushed electric motors in model aircraft and helicopters. Modern batteries and BLDC motor products allow model airplanes to vertically ascend, versus gradually climb. Small glow fuel internal combustion engines that were used in the past are no comparison to the silent and clean BLDC motor products.

BLDC motors have also increased in popularity among the Radio Controlled (RC) cars, buggies, and trucks, where sensor-type BLDC motors allow the position of the rotor magnet to be detected. Many BLDC motors feature upgrades and replaceable parts like sintered neodymium-iron-boron (rare earth magnets), replaceable motor timing assemblies, and ceramic bearings. As a result, these BLDC motors are quickly ascending to the top of the list as far as preferred motor types for electric on and off-road RC racers. BLDC motors have low-maintenance, high reliability and power efficiency ~ most BLDC motors with an efficiency rating of 80% or more.

The key dissimilarity between brushless motor, also known as a BLDC motor, and their predecessors is the process of commutation. Newer BLDC motor products are electrically commutated; this is accomplished with Hall elements, by counter EMF, or encoder feedback.

A BLDC motor is very useful and cost-effective by their design and construction. However, there are some factors that can negatively affect the life expectancy of the BLDC motor:

Key Points to Remember -
• Bearing failure and lack of lubrication are major factors when it comes to a BLDC motor failing. As a result, manufacturers now use industrial grade components so that a BLDC motor now has the ability to last lifetimes in excess of 20,000 hours or more! Integrated into the BLDC motor are permanently lubricated ball bearings that use special grease, thus eliminating the need for re-lubrication. IMPORTANT NOTE: Non-approved lubricants are not recommended for the BLDC motor components because they could potentially shorten the life of the BLDC motor.

• Temperature also plays a key role in the lifespan of the BLDC motor. The motor casing in particular must ensure that the heat generated in the BLDC motor windings must be dispelled. A BLDC motor could face severe damage if it exceeds the BLDC motor specification with respect to heat. BLDC motor performance has a direct correlation with the maximum possible rotor temperature, ambient temperature, and duty cycle. As temperature increases, the winding resistance increases, and magnetic forces decrease, ultimately causing the BLDC motor to perform less efficiently.
• When a BLDC motor runs at high continuous loads, heat sinking and forced air-cooling can considerably lower operating temperatures. Therefore, it is highly recommended that all of these factors be taken into consideration when designing and installing motion control systems that include a BLDC motor.

Most BLDC Motor Products need a BLDC Driver or controller to run. There are many different types of BLDC Driver products that are manufactured around the world for different applications. Many come with different options and can be custom made. Most are referred to as Electronic Speed Controller (ESC). In a BLDC Driver, either a Hall Effect Sensor or the Back EMF (Electromotive Force) is used to run the motor. The Hall Effect uses three hall sensors within the motor to help detect the position of the rotor. This method is primarily used in speed detection, positioning, current sensing, as well as proximity switching. The magnetic field changes in response to the transducer that varies its output voltage. A feedback is created by directly returning a voltage since the sensor operates as an analogue transducer. The distance between the Hall plate and a known magnetic field can be determined with a group of sensors, in this case, three, and the relative position of the magnet can be deduced. A Hall sensor can act as an on/off switch in a digital mode when combined with circuitry. The Back EMF, also known as the Counter-Electromotive Force is caused by a changing electromagnetic field. In a BLDC Motor, the back EMF is a voltage that occurs where there is motion between the external magnetic field and the armature of the motor. In other words, the voltage is developed in an inductor by and alternating current or pulsating current. At every moment, the polarity of the voltage is the reverse of the input voltage. This method is commonly used to measure the motor’s position and speed indirectly.

Some of the advantages of a BLDC Motor, but are not limited to are: • Higher speed ranges • High dynamic response • Long operating life • Better speed versus torque characteristics • Noiseless operation • High efficiency Disadvantages for a BLDC Motor • High cost • Additional system wiring is required to power the electronic commutation circuitry • Motion controllers/drivers electronics needed to operate a BLDC Motor are more complex

A BLDC Motor varies in price. It can be anywhere from twenty dollars or less to several hundred dollars, possibly more. It just depends on the size and capabilities of the brushless dc motor itself.

A BLDC motor has an electronic commutation system, no brushes and no mechanical commutators. This allows the BLDC Motor to operate at higher speeds. There can be a different amount of poles on the stator for each motor.

When selecting a BLDC Motor , you want to ask yourself a few questions. Such as, what is my application? What are my specifications? How much do I want to spend? What controller/driver and I going to use/need? These are some of the questions you want to think about to narrow down your selection. You will definitely want to do your research. The type of application will need to be determined for your BLDC Motor. You will then need to determine all specifications, known ones along with possible ones. For example, do you need a specific frame size, weight, power, speed, length, etc. Once you have determined all those things, you will need to take into consideration on what controller/driver you will be using. This goes hand in hand with the selection of the motor. Keep in mind there are many different motors and driver/controllers to choose from, therefore it is wise to do detailed research.

The BLDC Motor has the physical appearance of a 3-phase permanent magnet that is stationary which is located on the outside, which is known as the Stator. The rotating armature is located inside and is also called the rotor. BLDC Motors can be constructed in many different physical configurations. One configuration is known as the “Inrunner” type where the permanent magnets are a part of the rotor and three stator windings are surround the rotor. Another configuration is the “Outrunner” type, where the radial-relationship between the coils and magnets is reversed. The stator coils form the core of the motor, while permanent magnets spin within an overhanging rotor surrounding the core.

A Brushless DC motor is also known as a BLDC Motor; synchronous electric motors that are DC (Direct Current) powered. They are electronically commutated without brushes making them “Brushless”. A BLDC Motor consists of a fixed armature along with permanent magnets that rotate, hall sensors, stator windings, rotor magnet North and South, hall sensor magnets, an accessory shaft, and a driving end of the shaft.

Anaheim Automation supplies many different accessories for our BLDC motor. These accessories include an encoder, driver, brake, connector, and a cable. Because of the BLDC Motor brake is a 24vdc system, it is perfect for any holding application. They are offered on any Anaheim Automation BLDC motor, and are already attached to the rear of the BLDC motor. The BLDC motor brakes have a low voltage design for applications that are susceptible to weak batter, brown out, or long wiring runs. When implementing an electric force to the BLDC Motor brake the armature is drawn by the electromagnet force in the magnet body assembly, overcoming the spring action. By overcoming the spring action the friction disc will rotate freely. Interrupting the electrical power will occur because the electromagnetic force was removed and the pressure spring mechanically causes the armature plate to clamp the friction disc between itself and the pressure plate. BLDC motor cables can be made with the supplied BLDC motor connector, or can be obtained from Anaheim Automation.

Consumer Electronics Although a BLDC motor may perform the same functions originally fulfilled by brushed DC motors, cost and control complications prevent a BLDC motor from completely replacing brushed motors. However, BLDC the motor has monopolized many areas of the consumer electronics industry, and are used in many different locations, including computer hard drives and CD/DVD players. A BLDC motor is used to operate the small cooling fans that are located in electronic equipment as well. Cordless power tools also utilize a BLDC motor because the need for increased efficiency of the BLDC motor allows for long periods of use before needing to recharge the battery. Furthermore, direct-drive turntables for ?analog? audio disks use a low-speed, low-power BLDC motor. Transport Electric and hybrid vehicles use a high power BLDC motor that are essentially AC synchronous with permanent magnet rotors. A BLDC motor is used in Segway and Vectrix-Maxi-Scooters also. Electric bicycles sometimes build a BLDC motor into their wheel hubs, with the stator solidly fixed to the axle and magnets attached to and rotating with the wheel. These electric bicycles have a standard bicycle transmission with pedals, sprockets, and chain that, if needed, can be pedaled along with or without the use of the BLDC motor. Heating and Ventilation It has become a popular trend to switch from AC motors to a BLDC motor (EC) because of the dramatic reduction in power needed o run them, versus the typical AC motor. Although shaded-pole and permanent split capacitor motors were the primary fan motor of choice, many fans today are being run by a BLDC motor. Some use a BLDC motor simply to increase system efficiency as a whole. Certain HVAC systems use ECM motors (electronically commutated BLDC motors). Particularly these are the HVAC systems that feature load modulation and/or variable-speed. A BLDC motor does not only have higher efficiency, but also a built-in microprocessor that allows for better airflow control, programmability, and serial communication. Model Engineering and Hobbyists The most popular motor choice for model aircraft today is the BLDC motor. The BLDC motor is available in a wide array of sizes, and have a favorable power to weight ratios. A BLDC motor has transformed the market of electric-powered flight. The introduction of the BLDC motor has displaced the use of almost all brushed electric motors in model aircraft and helicopters. Modern batteries and BLDC motor products allow model airplanes to vertically ascend, versus gradually climb. Small glow fuel internal combustion engines that were used in the past are no comparison to the silent and clean BLDC motor products. BLDC motors have also increased in popularity among the Radio Controlled (RC) cars, buggies, and trucks, where sensor-type BLDC motors allow the position of the rotor magnet to be detected. Many BLDC motors feature upgrades and replaceable parts like sintered neodymium-iron-boron (rare earth magnets), replaceable motor timing assemblies, and ceramic bearings. As a result, these BLDC motors are quickly ascending to the top of the list as far as preferred motor types for electric on and off-road RC racers. BLDC motors have low-maintenance, high reliability and power efficiency ~ most BLDC motors with an efficiency rating of 80% or more.

The BLDC Motor has become popular amongst the medical industry for its long-lasting design. Used in medical equipment, a BLDC motor has a life expectancy of 10,000 hours, versus the 2,000-5,000 hour lifespan of the brushed motor. The BLDC motor also has a top speed that is not limited by a large number of poles. It wasnt until the cost of these BLDC motors decreased, that they became a viable option for most medical applications. A BLDC motor can provide a more efficient, reliable, and compact motor that can be used in a variety of ways. Basically, a BLDC motor is a synchronous electric motor that is powered by a DC power source. An electric commutation circuit replaces the standard commutator and brush assembly found in the brushed DC motor. A BLDC motor and a brushed DC motor are essentially polar opposites. While the windings of a brushed motor rotate around the rotating shaft or armature, the BLDC motor has windings that are attached to the motor housing. The magnets of the brushed DC motor attach to the motor housing, while the BLDC motor magnets are affixed to the rotor. Commutation is the process of reversing the polarity of the phase currents in the windings of the motor at an exact time that will produce continuous rotational torque. If commutation did not occur, the magnets and magnetic fields would lock the rotating shaft in place by aligning themselves. The appropriate reversal time is crucial; the BLDC motor shaft must continue spinning, and it does so as a result of the changing polarity of the windings. The primary way a BLDC motor and a brushed DC motor differs is in their methods of commutation. Brushed DC motors use brushes and a commutator that acts as an electromechanical switch to connect the windings in the proper polarity. In the BLDC motor, electronic switches take the place of the mechanical switch, controlling the timing of the polarity-reversal by an electrical circuit. Usually, a BLDC motor senses rotor position and controls the electronic drive of the motor by using Hall-effect devices (HFD). However, because of the ability to monitor motor back-EMF, HFD can be eliminated to create a sensorless BLDC motor drive. These motors are far less expensive, and are a primary reason they appeal in medical equipment design. Sleep Apnea can also be treated with the help of a BLDC motor. Treatment for the disorder requires the use of Positive Airway Pressure (PAP) respirators. The PAP respirator is attached to a special breathing mask that the patient must wear to breathe through while sleeping. Within the respirator is a blower fan that pressurizes the air mask, according to the patients breathing pattern. As the patient inhales, the blower fan speeds up, allowing more air to reach the lungs. Oppositely, when the patient exhales, the blower fan slows down to reduce the amount of air the patient breathes out. A BLDC motor never needs to operate underneath the minimum threshold speed of the drive, so they are the perfect power source for blower fans. Furthermore, there is no risk for any sudden changes in load. Low-noise-level standards force hospital equipment to be as quiet as possible, thus making the BLDC motor a prime candidate due to how silent they are in operation. The BLDC motor can operate at high speeds with accuracy, and yet maintain a silent sound. Therefore, they can be used both in hospitals, and in the patients home. It is the absence of a commutator and brushes in the BLDC motor that removes even more of the motor noise.

In todays world the BLDC Motor is utilized in various applications in different industries for motion control. For example some of many uses are Automotive, CNC, Instrumentation, Aerospace, Applicances, Medical, Semiconductor, Consumer, and Packaging Equipment.

All BLDC Motor Products are permanent magnet motors. There are also two basic types labeled as a Trapezoidal Motor and the other as a Sine Wave Motor. The Trapezoidal Motor is said to be a DC servo motor and the Sine Wave Motor has close resemblance to an AC synchronous motor.

A basic definition for BLDC motor products is an automatic machine that uses error-correction rountine to correct the motion of the BLDC motor. The general term BLDC can be applied to systems other than a BLDC motor that use a feedback mechanism such as an encoder or other feedback device to control the motion parameters. Typically when the term BLDC is used it applies to a BLDC motor but this term is also used as a standard control term with the meaning of a feedback loop to position whatever the product is including a BLDC motor. BLDC motor products differ from other controlled motors because its controlled by a time-based derivative commonly referred to as the PID loop. A BLDC motor that is used to control position must be capable of changing the velocity of the output shaft because the time-based derivative, or the rate of change of position, is velocity.

The Stator The stator of a BLDC Motor is similar to an AC motor but the windings are different. The stator of a BLDC Motor has stacked steel laminations, and the windings are inserted in the slots that are cut inside the laminations. There are three stator windings in each BLDC Motor connected in either a Delta or star configuration. Each of these windings there are multiple coils that are constructed to connect together to form a winding. There are generally a even number of polls in the BLDC Motor products. Anaheim Automation typically constructs them with six coils per BLDC Motor, which are made into a three-phase winding. Mainly there two forms of stator windings, sinusoidal and trapezoidal. The difference in the stator windings is identified in the interconnection of the coils of the stator windings. Which result in a different type of back EMF the trapezoidal variant delivers its back EMF in shape of a trapezoid. Each sinusoidal variation gives its BLDC Motor a back EMF that matches with the current. The faulted also is used as the shape of the sinusoid and a trapezoid. The major difference between the two BLDC Motor products is the smoother output torque that you recieve from the sinusoidal BLDC Motor than the trapezoidal BLDC Motor. The stator will winding can be wound for multiple folk voltages. This can be customized for almost any distinct applications are speed and torque requirements. The Rotor The rotor is made up of permanent magnets and normally have between two and eight poles the magnets are bonded onto the rotor core in switching north and south pole fields. Ferrite magnets are normally used to make the permanent magnet rotor. For higher power density applications, rare earth magnets are being used more frequently then ferrite magnets that are less expensive, but have lower flux density when compared to the rare earth magnets. The price of the rare earth magnets are coming down, giving the manufacturers an advantage to put in a higher power density to allow the BLDC Motor to put out more torque in a smaller volume. Rare earth magnet types: Neodymium (Nd) Samarium Cobalt (SmCo) The alloy of Neodymium, Ferrite, and Boron (NdFeB)

The establishment of Anaheim Automation as a manufacturer of turkey motion control systems took place in 1966. Our emphasis on R&D has insured the continued production of high tech BLDC Motor driver/controller, such as the BLDC Motor product line. As many other products Anaheim Automation supplies alongside with the BLDC Motor product line, Anaheim Automation ranks high among the leading distributor and manufacturers of motion control products, and given a high ranking for its excellent name for quality products at competitive prices. There is a wide variety of standard BLDC Motor products offered at Anaheim Automation. Occasionally, OEM customers with mid to large quantity demands prefer to have a BLDC motor that is custom or modified to meet their specific design requirements. Sometimes the customization to the BLDC Motor is as simple as an oil seal for an IP65 rating, wire colors, label, shaft modification, mounting dimensions, or brake. The customization can also be as complex as making adjustments to the torque, speed and/or voltage. Buyers appreciate Anaheim Automations simplicity of one-stop shop? and the cost savings of a BLDC Motor custom design while engineers appreciate the creativity, system efficiency, and flexibility that Anaheim Automation offers for their BLDC Motor product line. Anaheim Automations standard BLDC Motor product line is known for its rugged construction and excellent performance and is very cost-effective. A considerable size of its sales growth has resulted from committed engineering, friendly customer service and professional application assistance, often surpassing the customers expectations for fulfilling their custom requirements. While a good portion of Anaheim Automations BLDC motor sales involves special, custom, or private-labeling requirements, the company takes pride in its standard stock base located in Anaheim, California, USA. To make customization of a BLDC motor affordable, a minimum quantity and/or a Non-Recurring Engineering (NRE) fee is required. Contact the factory for specifics, should you require a custom BLDC motor in your design. A NCNR Agreement must be signed customer per each request, and all sales for a customized or modified BLDC Motor are Non-Cancelable-Non-Returnable. All Sales, which include a customized BLDC motor, are made pursuant to Anaheim Automations standardized Terms and Conditions, and are in lieu of any other expressed or implied terms, including but not limited to any implied warranties. Anaheim Automation has a wide range of customers for the BLDC Motor product line: companies running or developing automated machinery or processes that involve food, medical packaging, special filming and projection effects, inspection and security devices, assembly, labeling or tamper-evident requirements, cosmetics, medical diagnostics, conveyor, pump flow control, robotics, equipment upgrades, and metal fabrication (CNC machinery). We often put a private-label for many OEM customers that request it so their customers stay loyal to them for replacement, servicing, and repairs. PLEASE NOTE: Technical assistance regarding its BLDC motor product line, as well as all the products manufactured or distributed by Anaheim Automation, is offered at no charge. This will help Anaheim Automations customers choose the right product for a specific application. However, any application, selection, or quotation recommendation given by Anaheim Automations staff for a BLDC Motor, or any other product, its distributors or representatives can only to assist the customer. In all cases, determination of fitness of the custom BLDC motor in a specific system design is solely the customers responsibility. While every effort is made to offer solid advice regarding the BLDC motor product line, as well as other motion control products, and to produce technical data and illustrations accurately, such advice and documents are for reference only, and subject to change without notice.

For low-speed applications it is highly recommended to use an encoder for the feedback rather than the Hall sensors. The Hall sensor counts per revolution can only be as great as a number of polls times the quantity of Hall Sensors. The high count that is calculated by the BLDC Motor controller can be used to its advantage when operating a BLDC Motor. The BLDC Motor controller can more precisely control the velocity by utilizing the additional information from the BLDC Motor. The higher the resolution on the encoder to more finely the BLDC Motor controller can control the BLDC Motor. Even though the expense is much greater for encoders when compared to Hall sensors this price can be justified as it can result in very precise control for a much lower cost than alternative technologies such as Servo motors were AC motors or synchronous motors.

The following environmental and safety criteria must be observed during all phases of operation, repair and service of a BLDC motor system. Failing to comply with these precautions violates safety criteria of design, manufacture and intended use of the BLDC motor and controller. Please note that even well-built BLDC motor products operated and installed incorrectly, could be hazardous. Precaution must be observed by the user with respect to the load and operating environment. The customer is ultimately responsible for the proper selection, installation, and operation of the BLDC motor system. The atmosphere in which a BLDC motor is used must be conducive to good standard practices of electrical/electronic equipment. Do not operate the BLDC motor in the presence of flammable gases, dust, oil, vapor or moisture. For outdoor use, the BLDC motor and controller must be protected from the elements by an adequate cover, while still providing adequate air flow and cooling. Moisture may cause an electrical shock hazard and/or induce system breakdown. Due consideration should be given to the avoidance of liquids and vapors of any kind. Contact the factory should your application require specific IP ratings. It is prudent to install the BLDC motor and controller in an environment which is free from electrical noise, shock, condensation, and vibration. Furthermore, it is more suitable to work with the BLDC motor and controller system in a non-static protective environment. Uncovered circuitry should always be properly guarded and/or enclosed to prevent unauthorized human exposure with live circuitry. No work should be performed while power is applied. Dont plug in or unplug the connectors when power is ON. Wait for at least 5 minutes before doing examination work on the BLDC motor system when turning power OFF, because even after the power is turned off, there will still be some electrical energy remaining in the capacitors of the internal circuit of the BLDC motor controller. Plan the installation of the BLDC motor and controller in a system design that is free from debris, such as metal debris from tapping, welding, drilling, and cutting, or any other foreign material that could come in contact with circuitry. Failing to prevent debris from entering the BLDC motor system can result in damage and/or shock.

It is said that BLDC Motor motors have been in commercial use and possible since 1962, although the first BLDC Motor motor appeared during the 1800s. This was made possible by the conversion of electrical energy into mechanical energy by electromagnetic means, which was demonstrated by a British scientist by the name of Michael Farady in 1821. A Hungarian physicist by the name of Ányos Jedlik began experimenting with devices he called electromagnetic self-rotors in 1827. At the time, they were only used for instructional purposes. In 1828, he demonstrated the first device to contain the three main components of practical direct current motors; the rotor, commutator, and stator. The magnetic fields of both the revolving and stationary components were produced solely by currents flowing through their windings and the motors did not contain permanent magnets in those times. In 1832, William Sturgeon, also a British scientist invented the first commutator-type direct current electric motor capable of turning machinery. Americans, Thomas and Emily Davenport built a commutator-type direct current electric motor with the intention of commercial use in following Sturgeon’s work and patented in 1837. The motors were used for a printing press and powered machine tools. They were said to have ran up to 600 revolutions per minute (RPM). The motors were commercially unsuccessful due to the high costs of the primary battery power, also there was no practical commercial market for the motors at that time. A modern BLDC motor was accidently invented in 1873, when a dynamo was to a similar motor driving it as a motor by Zénobe Gramme. He then created the Gramme Machine, it was the first electric motor that was successful in the industry. A non-sparking motor capable of constant speed under variable loads was the first practical BLDC motor was invented in 1886 by Frank Julian Sprague.

The feedback for a BLDC Motor is carried out by the use of Hall sensors when rotating the BLDC Motor in the stator windings need to be energized sequentially. In order to understand the next winding that would need to be energized in the proper sequence, the controller needs to know the rotor position. The BLDC Motor utilizes three Hall sensors, and these Hall sensors that are embedded in the back end cap of the BLDC Motor housing sense the rotor position. They are separated by either 60° or 120°. Hall sensors sense either the rotor magnet or external magnet placed in the back of the shaft, and sends off a signal signifying whether or not a North or South Pole passes the censors. Using each signal from the sensors, the BLDC Motor controller can easily maintain the BLDC Motor velocity. Each Hall sensor normally mounted on a PC board and fastened to the back end cap on the non-driving end of the BLDC Motor.

Many BLDC Motor designs today are being made with the housing less design. In this design the laminations are exposed and are sprayed with a paint to prevent the laminations from rusting. Then there are some BLDC Motor designs that are still being manufactured in a housed extrusion or aluminum or steel cylindrical housing where the laminations of the stator are inserted and secured inside.

Most BLDC Motor Products need a controller/driver to run. There are many different types of controllers/drivers that are manufactured around the world for different applications. Many come with different options and can be custom made. Most are referred to as Electronic Speed Controller (ESC). In a BLDC Motor Controller/Driver, either a Hall Effect Sensor or the Back EMF (Electromotive Force) is used to run the motor. The Hall Effect uses three hall sensors within the motor to help detect the position of the rotor. This method is primarily used in speed detection, positioning, current sensing, as well as proximity switching. The magnetic field changes in response to the transducer that varies its output voltage. A feedback is created by directly returning a voltage since the sensor operates as an analogue transducer. The distance between the Hall plate and a known magnetic field can be determined with a group of sensors, in this case, three, and the relative position of the magnet can be deduced. A Hall sensor can act as an on/off switch in a digital mode when combined with circuitry. The Back EMF, also known as the Counter-Electromotive Force is caused by a changing electromagnetic field. In a BLDC Motor, the back EMF is a voltage that occurs where there is motion between the external magnetic field and the armature of the motor. In other words, the voltage is developed in an inductor by and alternating current or pulsating current. At every moment, the polarity of the voltage is the reverse of the input voltage. This method is commonly used to measure the motor’s position and speed indirectly.

BLDC Motor Products have and continue to rise in popularity for many different applications. Although, A BLDC Motor may cost a little more than DC Brushed Motors, they have far more advantages than disadvantages. Many industries have turned to BLDC Motor motors for their applications. For specific Industries, please check the “What Industries are BLDC Motor Products used in” section.