Summary:...
If the DC brushless motor has demagnetization, it is very likely to have an electromagnetic strike. If it is serious, the motor can only be replaced.
Reasons for demagnetization of
bldc gear motor:
An important indicator of the performance of a brushless DC motor is the high temperature resistance class. If it exceeds its temperature resistance class, its magnetic flux density will drop sharply. The high temperature resistance grade can be divided into: N series, resistance above 80 degrees; H series, resistance 120 degrees; SH series, resistance above 150 degrees.
1. The cooling fan of the motor is abnormal, causing the motor to become hot
2. The motor is not equipped with a temperature protection device
3. The ambient temperature is too high
4. Unreasonable motor design
How to prevent demagnetization?
1. Correctly choose the power of brushless DC motor
Demagnetization is related to the power selection of the motor. The correct selection of the power of the brushless DC motor can prevent or delay demagnetization. The main reason for the demagnetization of the synchronous motor is excessively high temperature, and overload is the main reason for excessively high temperature.
Therefore, a certain margin should be left when selecting the motor power. According to the actual situation of the load, about 20% is generally appropriate.
2. Avoid heavy starting and frequent starting.
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