The comparison between the brushless motor and the brushed motor is as follows:
Brush motor disadvantage
(1) Large friction and large loss
The old model friends encountered this problem when they used to brush the motor. That is, after using the motor for a period of time, it is necessary to open the motor to clean the carbon brush of the motor. It takes time and effort, and the maintenance intensity is no less than a home cleaning.
(2) Large heat and short life
Due to the structure of the brush motor, the contact resistance of the brush and the commutator is large, resulting in a large overall resistance of the motor, which is easy to generate heat, and the permanent magnet is a heat-sensitive element. If the temperature is too high, the magnetic steel will demagnetize. To reduce the performance of the motor and affect the life of the brushed motor.
(3) Low efficiency and low output power
The heating problem of the brush motor mentioned above is largely due to the fact that the current is working on the internal resistance of the motor, so the electrical energy is converted to heat in a large degree, so the output power of the brush motor is not large and the efficiency is not high.
Brushless motor advantages
(1) No brush, low interference
The brushless motor removes the brush, and the most direct change is that there is no spark generated when the brush motor is running, which greatly reduces the interference of the spark to the remote control radio.
(2) Low noise and smooth operation
The brushless motor has no brush, the friction is greatly reduced during operation, the operation is smooth, and the noise is much lower. This advantage is a great support for the stability of the model operation.
(3) Long life and low maintenance cost
Without the brush, the wear of the brushless motor is mainly on the bearing. From a mechanical point of view, the brushless motor is almost a maintenance-free motor. When necessary, only need to do some dust removal maintenance. The comparison between the previous and the next knows the advantages of the brushless motor relative to the brushed motor, but everything is not absolute. The brushless motor has excellent low-speed torque performance and large torque. The brushless motor is irreplaceable, but As far as the ease of use of brushless motors is concerned, with the trend of the cost reduction of brushless controllers and the development of domestic and foreign brushless technologies and market competition, brushless power systems are developing at a high speed and popularization stage, which is also greatly promoted. The development of model movement.
