Use the common sense of the brushless dc motor, the content is as follows:, before disassembly, should surface dust with compressed air blowing off the motor, and scraped clean surface dirt. , and the choice of motor disassembly work, cleaning the live environment. And familiar with the motor structure characteristics and maintenance technical requirements. , ready to collapse the required tools (Including special tools)And equipment. , in order to further understand the defects in operation of the brushless dc motor, conditional can before disassembly when doing an inspection test. For this, turn motor with load test, the detailed check parts, such as temperature, sound, vibration motor, and test the voltage, current, speed, etc. , and then disconnect the load, do a no-load check test, no-load loss and no-load current is measured and recorded. , cut off power supply, electrical wiring to remove, recorded. , choose appropriate voltage test motor insulation resistance by megger are. Maintenance in order to keep pace with The Times when measured insulation resistance compared to determine the motor insulation change trend and insulating state, should be measured under different temperature insulation resistance value of the conversion to the same temperature, the average conversion to ℃. Absorbed, test than the K. When the absorption ratio is more than. , show that motor insulation or degree of be affected with damp be affected with damp be affected with damp be affected with damp or it's nothing serious. In order to compare with previous data, also want to add any temperature measured absorption than the conversion to the same temperature.