Brushless DC Motors Manufacturer

Sherry Brushless DC motors are designed and built to last. When our manufacturing personnel construct your motor, we build it to provide reliability. Every motor is 100% end of line tested to insure top quality and maximum performance. Brushless motors are designed to provide top efficiency.

What Is A BLDC Motor?

A brushless DC motor (also known as a BLDC motor or BL motor) is an electronically commuted DC motor which does not have brushes. The controller provides pulses of current to the motor windings which control the speed and torque of the synchronous motor.

Brushless DC motor has only two basic parts: rotor and the stator. The rotor is the rotating part and has rotor magnets whereas stator is the stationary part and contains stator windings. In BLDC permanent magnets are attached in the rotor and move the electromagnets to the stator. The high power transistors are used to activate electromagnets for the shaft turns.

In brushless motors, permanent magnets rotate around a fixed armature and overcome the problem of connecting current to the armature. Commutation with electronics has a large scope of capabilities and flexibility. They are known for smooth operation and holding torque when stationary.

Advantages of Brushless DC Motor

Brushless motors are more efficient as its velocity is determined by the frequency at which current is supplied, not the voltage.
As brushes are absent, the mechanical energy loss due to friction is less which enhanced efficiency.
BLDC motor can operate at high-speed under any condition.
There is no sparking and much less noise during operation.
More electromagnets could be used on the stator for more precise control.

BLDC motors accelerate and decelerate easily as they are having low rotor inertia.
It is high performance motor that provides large torque per cubic inch over a vast sped rang.
BLDC motors do not have brushes which make it more reliable, high life expectancies, and maintenance free operation.
There is no ionizing sparks from the commutator, and electromagnetic interference is also get reduced.
Such motors cooled by conduction and no air flow are required for inside cooling.

How we ensure a profitable business partnership

Professionally Trained Engineering & Manufacturing Team

Producing custom-made, DC motors is a complex process.
Even before the raw materials are trucked to the manufacturing plant and brought to the production line, both the client and electric motor manufacturer have started to solidify their working relationship by laying the ground work that’s required prior to the commencement of production.
Successful working relationships require trained professionals, including engineering, manufacturing, supply chain, logistics, quality control, among others, to create not only the motor design and prototypes, but also the manufacturing processes and delivery channels.
Sherrymotors has built a design and manufacturing team of highly trained and customer-focused professionals.
It leverages both the technical expertise and customer service skills of its staff to ensure production goals occur within budget.

Comprehensive Manufacturing Facilities

Manufacturing any product requires both the equipment and facilities to handle projected production volume, capacity or throughput.
Beyond capacity considerations, what’s key for a custom electric motors manufacturer is to have all the machinery, equipment and testing capabilities in house and on-site so it can produce motors from start to finish in a timely fashion.
Sherrymotors has built a state-of-the-art comprehensive production facility that’s fully equipped to manufacture even high volume runs.
It’s onsite process equipment includes, CNC machining, shaft splining, automated magnetizing, heat treating, epoxy coating insulation, automated coiling, winding, commutator slotting and balancing, varnishing and welding/painting/special fabrication.
It also has a testing laboratory, which includes a 30 HP dynamometer and 500 Amp testing capability, to conduct both standard and special tests.

Standardized Work Processes Verified by Quality Control Systems

One of the motivations for using a custom motor manufacturer is the belief that a specialist can manufacture a motor, quicker, less expensively and with a greater level of quality. It is the ability to manufacture a quality product that reaps both cost and time benefits.
To obtain a high level of quality, a successful DC motor manufacturer should implement standardized work processes to enhance consistency and reliability. The motors should be tested throughout the production chain to verify this quality.
Sherrymotors understands the vital importance of manufacturing process control to produce consistent and reliable product.
Sherrymotors has invested in ISO-9001: 2008 registration and implemented Lean Six Sigma initiatives. All of its machining operations undergo first piece inspections and all of its motors go through end-of-line testing.
Sherrymotors uses documented manufacturing procedures and its production work-stations are linked to the engineering department to ensure all parts are manufactured to the latest revisions.

Brushless DC Motor List

Key features that set Sherrymotors’ electronically commutated EC motors apart are their excellent torque performance, high power, extremely wide speed range, and unrivaled service life. The outstanding controllability of the motors permits the creation of high-precision positioning drives.

Applications of Brushless DC Motor

Brushless motors fulfill many functions originally performed by brushed DC motors, but cost and control complexity prevents brushless motors from replacing brushed motors completely in the lowest-cost areas. Nevertheless, brushless motors have come to dominate many applications, particularly devices such as computer hard drives and CD/DVD players. Small cooling fans in electronic equipment are powered exclusively by brushless motors. They can be found in cordless power tools where the increased efficiency of the motor leads to longer periods of use before the battery needs to be charged. Low speed, low power brushless motors are used in direct-drive turntables for gramophone records.

How to choose Brushless DC Motors?

There are many reasons to buy brushless motor such as the motor’s high efficiency, excellent torque, durability, and low maintenance requirements. But the motor has to fit its intended use, which calls for a careful approach when choosing one. We recommend checking brushless DC motor specifications before making your choice as well as other factors mentioned below.

Factors to Consider When Buying a Brushless DC Motor

01 Type of Motor

There are different brushless DC motor types out there. Each one of them offers benefits and drawbacks when used in specific environments. Based on the information contained in the preceding chapters, choose the one that best fits your requirements. In-runner BLDC motors, for example, are suitable for high speed applications but lack torque. Out-runners, on the other hand, are not as fast, but provide higher torque levels.

02 Motor Size

Different applications require motors of different sizes. Most of the time, BLDC motor manufacturers use a naming system that consists of 4-digit numbers. In this system, the first two digits indicate the size of the motor in terms of stator diameter in millimeters. The higher the number, the larger the stator and the more powerful the motor. But that also means a bulkier motor. Based on your specific project requirements, buy a brushless DC motor that fits planned use.

03 Type of Controller

A brushless motor uses an electronic controller to cover its operation. The controller can be a simple on/off system, sinusoidal or trapezoidal. An on/off controller generates audible noise and does not produce a smooth torque. However it provides for a cheaper control method. A trapezoidal controller is smoother, but not as smooth as the sinusoidal type. Consider the options carefully especially if buying your brushless DC motor online.

04 Price

Just like it is the case with other products, the price of a BLDC motor plays a big role in your selecting process. You do not want to spend more than is necessary or too little and end up with a low-quality device. The brushless DC motor price is usually dictated by the number and type of components. A sensored BLDC motor, for example, costs more than the sensorless type.

Small brushless motors cost between $100 and $300. Bigger ones with complex constructions and high-end electronics are higher prices than that, going for up to several hundred or even higher. These are normally used in industrial settings. Remember, a cheap brushless DC motor is less likely to offer the best performance. However, a high price does not guarantee better performance either. Go for moderately priced brands.

05 Motor Ratings

These are brushless DC motor specifications that indicate the operating characteristics for power, voltage, speed, torque, and more. The ratings are usually written in the specs sheet, indicated on the motor itself, or mentioned online on the manufacturer’s website. The most important are:

Torque- brushless DC motor torque levels vary based on the operating condition. The torque specs include peak torque and continuous torque. Peak torque usually denotes the highest value for a short period such as when starting, while continuous torque means the rated torque for any given speed. It’s advisable to choose a motor whose torque suits the needs of the application, or it will struggle to move loads.
Rated Voltage- this value refers to the rated terminal voltage that the motor requires to operate. This will usually be indicated by the manufacturer. Common portions include 12V 24V and 48V. A 12V brushless DC motor runs off a 12 volt source while a 48V motor requires a 48V source. Using the wrong voltage source can mean a motor that will not build enough torque or one that gets ruined completely.
Power Rating- the power rating is usually expressed in watts. A higher power rating means a more powerful motor, and vice versa. It’s important to select a motor whose power rating is high enough for your needs, but not too high to surpass the needs of the application. A brushless DC motor for RC car, for example, needs to maintain high torque at low power consumption.
RPM rating (speed) – high speed applications require a BLDC motor with higher RPM and the other way round. Usually, the speed will be indicated by the Kv and included in the specs sheet. A higher number means a higher level of RPM. To find a brushless DC motor highest speed, multiply the Kv rating by the voltage.
Stator Winding Size- the size of winding is directly related to the amount of torque, with larger size producing a more powerful motor. However, happens at the expense of speed, and such a motor would only attain a low peak rpm. The amount of this magnetic fix is proportional to the number of coil turns. For the right choice, consider balancing the two.

06 Conclusion

Buying a BLDC motor requires a careful attention to several details. These include the parameters that describe the motor’s working characteristics, or the brushless DC motor specifications. Matching these with your project needs, you can be sure to buy a BLDC motor that perfectly suits the intended purpose or use. That’s because BLDC motors come in many different types and making the wrong choice can mean a failed project.