Electrical network 1, apart before, check the appearance of the brushless dc motor integrity first, then use compressed air to blow away the dust in the brushless dc motor appearance, grime and wiped appearance. 2, and the choice of brushless dc motor divided workplaces, clean up the environment at the scene. 3, understand the brushless dc motor structure characteristics and maintenance of the technical requirements. 4, ready to open the required special tools and equipment. 5, in order to further understand the defects of brushless dc motor operation, when conditions allow, can examine test before open. Therefore, the brushless dc motor load, commissioning detailed check the temperature of the parts of the brushless dc motor, noise, vibration, etc. , and test the voltage, current, speed, etc. , and then disconnect the load, no-load check experiments respectively, measurement of no-load loss and no-load current and and make records. 6, block the power and remove the dc brushless motor wiring and make records. 7, select multimeter to test the insulation resistance of brushless dc motor. In order to compare the last overhaul during the measurement of insulation resistance value, to determine the insulation of the brushless dc motor change trend and insulating state, different temperature measurement of insulation resistance value shall be converted to the same temperature, the average is 75 ℃. 8, the absorption rate of k test. When the absorption rate is greater than 1. 33, show that brushless dc motor insulation not affected by the wet or moist degree is not serious. In order to comparing with previous data, also will any temperature measured absorption rate should also be converted to the same temperature. 9, after all the problems view, deal with the problems found, reassemble the complete, and running to see.
