Aiming at a large number of premature failures of wingding insulation of PWM inverter-fed AC traction motor,the inverter-fed AC traction motor wingding is taken as a sample,and square-wave high-voltage pulse is imposed to carry out electric aging test.The influences of pulse supply voltage,pulse frequency,and temperature on the life of traction motor wingding sample are investigated.It is shown that the wingding life decays exponentially with the increasing voltage and temperature.Within frequency range for...
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