After sale service small case: the electric motor stator winding to the ground to wear strikes

SHANGHAI WANNAN ELECTRIC MOTOR CO.,LTD|2016-03-29 15:09|5725 view

Case: a user reflect a YP2-280S-6/45KW motor stator winding to ground breakdown, Wannan Motor Service Center sent door-to-door service.

Site inspection process and results: the motor factory date is January 2014. The first step, hand rotating motor rotor, flexible rotation, no blocking phenomenon, show that the bearing is good, not sweeping; the second step, open the motor terminal box, smell the strong smell of burnt insulation, use megohmmeter to measure the insulation resistance and white, are OM Omega, judge the insulation failure of all third steps; open, motor end cover, the whole coil burned, the color black, which belongs to the typical overheating fault, the service personnel to check the site, the belt conveyor motor is installed on the lower position, the surface of motor cooling ribs covered in muck and stones, blocking the cooling air duct, resulting in poor motor cooling, secondly, conveyor work because of stone flux changes greatly current, caused by high low, frequent use of overload, based on the above analysis, the motor is overload frequently have a fever, and difficult to heat the cooling air duct blockage, Eventually cause the motor burned.

Case analysis: coil whole black is typical overheating burn breakdown, which belongs to the site environment and working conditions caused by poor, should pay attention to: timely liquidation motor surface coverings, or at the top of the motor protection cover, to avoid sand blocking the air duct, runtime control conveying capacity, prevent overload; in the use of the scene, the following factors are likely to cause motor overheating fault: 1, the frequent starting; 2, equipment card death stall; 3, on-site environmental temperature over 40 degrees centigrade or above sea level more than 1000m; 4, space is too small, poor heat dissipation; 5, voltage is too high or too low.


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