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Problems to be aware of when applying brushless DC motors


1. Before disassembly, check the appearance integrity of the DC brushless motor, and then use compressed air to blow off the dust on the surface of the DC brushless motor and wipe away the surface dirt.

2. Select a workplace where the DC brushless motor is decomposed, and clean up the site environment.

3. Familiar with the structural characteristics and maintenance technical requirements of DC brushless motors.

4. Prepare special tools and equipment for disassembly.

5. In order to further understand the defects in the operation of brushless DC motors, when conditions permit, inspection and testing can be performed before disassembly. Therefore, load the DC brushless motor for trial operation, check the temperature, sound, vibration and other conditions of each part of the DC brushless motor in detail, and test the voltage, current, speed, etc., and then disconnect the load to conduct no-load inspection tests. Measure and record the no-load current and no-load loss.

6. Cut off the power, remove the external wiring of the DC brushless motor and make a record.

7. Select a multimeter to test the insulation resistance of the DC brushless motor. In order to compare the insulation resistance values measured during the last overhaul to determine the insulation change trend and insulation state of the DC brushless motor, the insulation resistance values measured at different temperatures should be converted to the same temperature, generally 75 ° C.

8. Test the absorption rate k. When the absorption rate is greater than 1.33, it means that the brushless DC motor insulation is not affected by humidity or the humidity is not serious. In order to compare with the previous data, the absorbance measured at any temperature should also be converted to the same temperature.

9. After all the problems are checked, deal with the problems found, reassemble them completely, and run the check.

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