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Micro BLDC Motor Instruction

Since our company launched a series of standard brushless motor products, has received the attention and recognition of many customers, many customers have asked and asked some questions? What are the standard brushless motors and what are the motor size parameters? What are the advantages and similarities compared to traditional DC motors?
We are very glad that everyone can tell us the doubts in their hearts. Here, we make a brief introduction and explanation of the national dream standard brushless motor
I. Comparison between DC brushed motor and DC brushless motor:
1. Structure:

The essential difference between a DC brushed motor and a DC brushless motor is that one contains a carbon brush and the other does not contain a carbon brush.

2. Operating principle

The DC brush motor realizes the motor operation through the interaction between the carbon brush and the commutator;

Brushless DC motors achieve motor operation through the interaction between electronic drive circuits and electromagnetic fields;

3. Performance comparison

a. Noise

When the DC brush motor is running, the noise of the motor is high due to the contact between the carbon brush and the commutator;

The operation of DC brushless motors is driven by the drive circuit, which completely eliminates the contact noise of the motor, which greatly reduces the noise of the motor during operation;

b. life

Brushed DC motors have a short life. The service life of this motor mainly depends on the brush commutator. Generally speaking, the service life of brushed motors is within 500 hours. If the
motor is operated under a large load for a long time, the service life of the motor will become shorter. .

Brushless DC motors have a long life. The service life of this motor mainly depends on the bearing. Generally, the service life of the motor is more than 30,000 hours.

c. Electromagnetic interference (EMC)

DC brushed motors have strong electromagnetic radiation. Frequent switching of motor brushes will cause strong electromagnetic interference to other electronic equipment.

DC brushless motors are driven by electronic circuits, which greatly suppress the generation of electromagnetic interference. It is especially suitable for use in clinical medicine, medical
equipment and some high-precision electronic equipment.

d. Motor efficiency

DC brushed motors have low efficiency. When the motor is running, the constant friction between the carbon brush and the commutator, the pressure drop loss between the carbon
brushes, plus some mechanical loss and electromagnetic loss, so the overall efficiency of the motor is low.

       The efficiency of the brushless DC motor is high. When the motor is running, the loss between the carbon brush and the commutator is completely eliminated, and the rare earth
permanent magnet with high coercive force and high remanence is used, so the efficiency of the motor is greatly improved during operation.

e. Speed control

Brushed DC motors are regulated by voltage, which is relatively simple and convenient, but will be limited when the speed is relatively low;

DC brushless motor can also be adjusted by voltage, but it can also be adjusted by PWM, which is more convenient for speed control at low speed.

f. Maintenance

Brushed DC motors need to be cleaned and brushes replaced regularly;

Brushless DC motors are basically maintenance-free;

g. Costs

DC brushed motor is low cost and easy to operate;

The cost of DC brushless motors is higher and the control is more professional. As the control technology of brushless motors continues to mature, the cost of electronic components
has decreased, people's requirements for product quality have increased, and the pressure of global energy saving and emission reduction has increased. Many DC brushed motors and AC
motors will gradually transition to DC brushless motors.

Significance of standard series brushless motors

Traditional DC motors are divided into 7 series, 5 series, 3 series, etc. These series include 755, 775, 750, 555, 545, 540, 395, 385, 380, 370, 365, 360, 310, 280, 130 and other typical
models. In order to enable customers to switch from brushed motors to brushless motors faster, we specially

In accordance with the standard universal interchangeable principles, we will launch various series of standard brushless motors:

Kegu Brushless BL16 Series ------- DC 130, 280 and other DC brushed motors (interchangeable and universal)

Kegu Brushless BL24 Series ------- DC 310, 370 and other DC brushed motors (interchangeable and universal)

Kegu Brushless BL28 Series ------- DC Brushed DC Motors 385, 395, 365 etc.

Kegu Brushless BL36 Series ------- DC 555, 545, 540 and other DC brushed motors (interchangeable and universal)

Kegu Brushless BL42 Series ------- DC 755, 775, 745 and other series DC brushed motors (interchangeable and universal)

Kegu Brushless BL52 Series ------- DC 987, 7997 and other series DC brushed motors (interchangeable and universal)


In addition, we have also introduced BL24, BL37, BL38, BL40,BL42,BL50,BL55 7 outer rotor series, complete models.

Kegu brushless standard motors are equipped with built-in drivers, standard interfaces, and universal interchangeability, including four functions: forward and reverse control,
stepless speed change, FG signal output, and braking. Guomeng brushless motors are widely used in: Window robot, hair curler, mowing robot, medical equipment, smart water pump, etc.

Listed products, can also provide customers with special customized services, fully cooperate with customers to create high-end brushless motor brands.


We sincerely welcome all customers to consult!

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Contact: Hong Kong Kegu Motor Sales Department

Phone: +86-18682260827

Tel: +86-0755-27801762

Email: sales@kegumotor.com

Add: No 51., Wan'an Road, Shajing Town, Baoan District, Shenzhen, China

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