Abstract

This paper analysis the effect of PWM switching and long cable length motor insulation effect on the voltage insulation components inside an adjustable speed drive (ASD).This paper gives the high potential voltage insulation problem may exist on various components inside the ASD and causes failures under long cable length .A system model to describe this phenomenon is described in this paper. A Dc bus voltage clamp circuit is introduced to reduce these voltage stresses. The effectiveness of circuit is verified by Mat lab/Simulink.

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