Three-phase asynchronous motor winding fault analysis and processing

Like a wrong Winding wrong cause incomplete rotating magnetic field,the start-up difficulties,imbalance of three phase current,the symptom such as large noise,serious when,if not handled in time will burn winding.Basically has the 220v ac electric motors following several ways: a very phase one or several coil embedded against or end wrong;(phase) set the;A phase windings to reverse;Multichannel parallel winding branch wrong;"Delta"and"Y"connection error.1,failure phenomenon Motor can't start,imbalance of no-load current is too large or too much,too fast or have severe vibration and temperature have a lot of noise,the phenomenon such as burn out the fuse.2,the reason Mistaking"delta"connect"Y";A three-phase winding maintenance on fore and aft by reverse;Relief boot is tap location choice not appropriate or internal wiring error;When offline,new motor winding connection error;The old motor s wrong judgment.

3.The maintenance method (1) ball.Such as the ball along the stator rotating circular surface rolling,that is correct,otherwise winding have wrong phenomenon.(2) the compass.If the winding is not wrong,is in a phase winding,the compass through adjacent pole (phase),low speed permanent magnet generator referring to the polarity should be on the contrary,in three-phase winding adjacent different phase (phase) group and the opposite;Such as polarity direction remains the same,suggesting a very (phase) reverse;If point to condemn,the group has the reverse coil.(3) the multimeter voltage method.According to the wiring diagram,if the two measuring voltmeter are no instructions,or a reading,a no readings,winding has pick up the place.(4) common and dry cell,milliammeter remanence method,motor steering method,etc.4.The processing method (1) a coil or coil set against,the no-load current have larger imbalance,repair should be carried out to the factory.(2) lead to reconnect after wrong should correctly judge fore and aft.(3) relief wrong should be controlled wiring diagram or schematic diagram,carefully proofread rewiring.(4) new motor logoff or again after winding connection

error,should be sent to factory repair.(5) of the stator windings connect the,pick up the one phase

current is particularly big,according to the characteristics of the malfunction and repair.(6)

take"Y"into"delta"type or number of turns 220v ac electric motors is not enough,the no-load

current is big,should be corrected in a timely manner.