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  1. Wildseuil

    Sparks between shaft and casing on DC motor

    Hi everybody, Thanks for your answers. I just wanted to add some details : Yes, we have a DC motor, probabely not designed for a use with VSD (!) as it's a refurbished one... At the moment, we only use the motor with no-load. The sparking problem appears only at low speed. Over 500rpm, the...
  2. Wildseuil

    Sparks between shaft and casing on DC motor

    Hi everybody, First of all, sorry if there are some mistakes in my english, I'm french... We've recently bought a DC motor (400V/400kW/3200rpm) as spare part. The original motor was smaller (250kW/3000rpm). This motor is driven with an ABB variable speed drive, which is designed for the bigger...

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