Have you encountered these problems in the use of DC brushless motors?
25 Dec,2024
Customers often ask us about some problems encountered in the use of DC brushless motors. Today, ETONM MOTOR will summarize and answer them for everyone to see what problems everyone has encountered.
1. DC brushless motor shaft generates current
What is shaft current? The current in the shaft, bearing seat and base circuit of the DC brushless motor is the shaft current. The main reasons for the generation of the shaft current are the asymmetric magnetic field in the DC brushless motor, the harmonics of the power supply current, the uneven air gap, the gap in the iron core and the unequal number of core laminations. The shaft current of the DC brushless motor will corrode the bearing or ball, resulting in increased friction loss and heat, causing the bearing of the DC brushless motor to burn.
2. Ordinary DC brushless motors are not suitable for use in plateau areas
Generally, ordinary DC brushless motors are not suitable for use in plateau areas because the altitude will affect the temperature rise, corona, and commutation of DC brushless motors. The higher the altitude, the greater the temperature rise of the DC brushless motor and the smaller the output power. According to the higher the altitude, the lower the temperature can compensate for the impact of the DC brushless motor temperature rise, and the rated output power of the DC brushless motor remains unchanged.
3. DC brushless motors cannot be operated under light load
When the DC brushless motor is operated under light load, it will lead to low efficiency and low power factor of the DC brushless motor, and also waste electricity. Therefore, it is best not to operate the DC brushless motor under light load.
4. The temperature rise of the DC brushless motor is too high
There are many reasons for the high temperature rise of the DC brushless motor, including excessive load, excessive voltage, phase loss, long low-speed operation, blocked vents, etc. Excessive temperature rise will reduce the service life of the DC brushless motor or directly burn it out.
5. Do not start the brushless DC motor at will in a severe cold environment
Since severe cold and low temperature environments may cause cracking of the DC brushless motor insulation and freezing of grease, the DC brushless motor must be inspected before operating it in a severe cold environment.
6. Abnormal noise and vibration of the DC brushless motor
Common causes of abnormal noise and vibration of the DC brushless motor are bearing wear or poor lubrication, loose fixing screws, foreign matter in the DC brushless motor, and overload of the DC brushless motor.
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