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Seven major differences between brushless motor and carbon brush motor
2020/10/29

Seven major differences between brushless motor and carbon brush motor

1. Scope of application
Brushless motor: it is usually used in the equipment with high control requirements and high speed, such as model airplanes, precision instruments, etc., which strictly control the motor speed and reach high speed.


brushed motor: Usually the power equipment is the use of brushed motor, such as hair dryer, factory motor, domestic range hood, etc., in addition to the series motor speed can reach very high, but due to the wear of carbon brushed, service life is not as good as brushless motor.


2. Service life
brushless motors: The service life is usually in the order of tens of thousands of hours, but the service life of brushless motors varies greatly due to different bearings.


brushed motor: there is usually a brushed motor in the continuous working life of hundreds to more than 1000 hours, reach the use limit need to replace the carbon brushed, otherwise it is very easy to cause the wear of the bearing.


3. Effect
brushless motor: usually digital frequency conversion control, strong controllability, from a few revolutions per minute, to tens of thousands of revolutions per minute can be very easy to achieve.


brushed motor: brushless motor generally starts after the working speed is constant, speed regulation is not very easy, the series motor can also reach 20,000 RPM, but the service life will be relatively short.


4. Energy conservation
Relatively speaking, the brushless motor controlled by frequency conversion technology will save much energy than the series motor, the most typical is the frequency conversion air conditioner and refrigerator.


5. In future maintenance, the carbon brushed motor needs to be replaced, which will cause damage to the motor if it cannot be replaced. brushless motor has a long service life, which is usually more than 10 times as long as the brushed motor.


6. The noise has nothing to do with whether the motor is brushed or not, but mainly depends on the coordination of the bearing and clicking on the internal components.


7 brushed motor refers to the motor is the direct current input, the controller control it only provides the size of the current can be regulated;The brushless motor is actually a three-phase ALTERNATING current, which is converted from direct current to three-phase alternating current by the controller, and is switched by the sensor hall element in the motor to make the motor run normally.Directly speaking, the brushedless motor has a longer life than the brushless motor, has a strong start and saves power, but the controller has a higher cost than the brushless controller.

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