The difference between brushless motor and brush motor
(1) Scope of application: Brushless motor: It is usually used on equipment with high control requirements and high speed, such as aircraft model, precision instrumentation, etc., which strictly control the motor speed and achieve high speed. Carbon brush motor: Usually the power equipment uses brush motor, such as hair dryer, factory motor, household range hood, etc., and the speed of the series motor can also be very high, but due to the wear of the carbon brush, use The life is not as good as the brushless motor.
(2) Service life: brushless motor: usually the service life is on the order of tens of thousands of hours, but the service life of the brushless motor is very different due to the different bearings. Carbon brush motor: Generally, the brush motor has a continuous working life of several hundred to more than one thousand hours. When the limit is reached, the carbon brush needs to be replaced, otherwise the bearing wear is easily caused.
(3) Use effect: Brushless motor: usually digital frequency conversion control, strong controllability, from a few turns per minute to tens of thousands of revolutions per minute can be easily realized. Carbon brush motor: The old carbon brush motor generally has a constant working speed after starting. The speed regulation is not very easy. The series motor can also reach 20,000 rpm, but the service life will be shorter.
(4) Energy-saving aspects: Relatively speaking, the brushless motor is controlled by frequency conversion technology, which is much more energy-efficient than the series-excited motor. The most typical ones are inverter air conditioners and refrigerators.
(5) In the future maintenance: the carbon brush motor needs to replace the carbon brush. If the replacement is not timely, the motor will be damaged. The brushless motor has a long service life, usually 10 times more than the brush motor, but it needs to be broken. The motor is replaced, but routine maintenance is not required.
(6) The noise aspect has nothing to do with whether it is a brush motor or not. It mainly depends on the cooperation of the bearing and the internal components of the motor.
(7) The parameter index of the model brushless motor, in addition to the external dimensions (outer diameter, length, shaft diameter, etc.), weight, voltage range, no-load current, maximum current and other parameters, there is also an important indicator KV value, this value It is a unique performance parameter of brushless motor and an important data to judge the performance characteristics of brushless motor.
