Impact of Motor Stator Winding Faults on Common-Mode Current

TL;DR

This paper examines how motor stator winding faults impact common-mode currents, revealing that failures alter impedance and noise path balance, leading to increased or converted currents, with experimental validation.

Contribution

It provides experimental insights into how stator winding faults affect CM and DM currents, highlighting the mechanisms of impedance change and noise path unbalance.

Findings

Stator faults increase CM current due to impedance changes.

Winding failures cause DM noise to convert into CM current.

Experimental results confirm the influence of faults on current behavior.

Abstract

This paper investigates the influence of different motor stator failures on the common-mode (CM) current. The stator winding failures will affect the motor's CM impedance, and also increase the unbalance of the differential-mode (DM) noise path. The experimental results show that the former will increase the CM current induced by the CM noise source, while the latter will cause the DM current induced by the DM noise source to be converted into the CM current.