Common faults of motors and the reasons

Electrical network:(1)the failure phenomenon:motor can't start,and there is no sound.Reasons:(1)blown fuse.(2)the starter off the brake.(3)power supply without electricity.(2)the fault phenomenon:the motor can't start,have a buzzing sound.electric vehicle motor Reasons:(1)the power cord a break,or a fuse,fuse or a motor phase winding wire break.(2)the air gap between the stator and rotor not normal,the collision of the stator and rotor.(3)bearing damage.(4)is driven mechanical stuck.(3)the failure phenomenon:when the motor starting blown fuse.Reasons:(1)a stator coil instead.(2)the stator winding short circuit or grounded.(3)bearing damage.(4)drive belt is too tight.(5)is driven mechanical stuck.6.When starting wrong operation.(4)the failure phenomenon:wholesalemotor.blogspot.com after the motor starting speed is low.Reasons:(1)the power supply voltage is too low.(2)the delta connection of motor connect into a star.(3)of the stator coil short circuit.(4)of rotor end ring and cage faults or welding.(5)motor overload.(5)fault phenomenon:the motor temperature is too high,but no more than current rating.Reasons:(1)the environment temperature is too high.(2)motor ventilation plugging.(3) motor oil sludge,dust too much heat.(6),fault phenomenon,in an explosion in the ac synchronous motor operation of the electric motor.Reasons:(1)coil grounding for the time being.(2)the coil short circuit for the time being.