Brushless dc motor starting before the check method: 1, new or discontinuation of brushless dc motor for a long time, before the use should check between the winding and winding insulation resistance to ground. Usually below 500 v for brushless dc motor with 500 v insulation resistance meter; The 500 -1000 v brushless dc motor with 1000 v insulation resistance meter; For more than 1000 v brushless dc motor with 2500 v insulation resistance meter. Insulation resistance shall not be less than 1 m Ω work every kv voltage, and should in the measurement of brushless dc motor cooling condition. 2, check whether there is any crack on the appearance of brushless dc motor, all fastening screws and parts are complete, the fixed situation of brushless dc motor are in good condition. 3, monitor the performance of the brushless dc motor drive system is reliable. 4, according to the data shown in nameplate, such as voltage, power, frequency, coupling, rotating speed and power supply, if load is consistent. 5, check the ventilation of brushless dc motor and the bearing lubrication condition is normal. 6, pull (brushless dc motor shaft, check the rotor can free rotation, rotation has no noise. 7, check of brushless dc motor brush and brush lifting mechanism is flexible assembly, for the location of the brush handle is correct. 8 earthing device, check the brushless dc motor is reliable.
