Single open‐phase fault detection and tolerant control for wye‐connected three‐phase induction machine drives

Abstract

SummaryThis paper proposes open‐phase fault detection (FD) and tolerant control strategies for wye‐connected three‐phase induction machines (WCTPIMs). The FD mechanism is based on the comparison between predicted and actual values of stator currents, and the control approach is derived from the field‐oriented control (FOC). In the proposed fault‐tolerant control (FTC) method, an asymmetrical current transformation is used for stator current components, and the conventional symmetrical voltage transformation is employed for stator voltage components. It is shown that using these transformations, a modified FOC can be employed for the faulty WCTPIM. The suggested scheme is able to control WCTPIM drives under normal and single open‐phase fault (SOPF) modes with minor adjustments. Experimental results achieved from a laboratory prototype confirm the possibility and good performance of the proposed open‐phase FD and tolerant control for the WCTPIM under different operating conditions.

Practical Test on the Operation of the Three-Phase Induction Motor under Single-Phasing Fault

“…In [22], the authors provide an FTC drive system that can be used for the sensorless speedcontrolled Y-connected three-phase induction motor during both normal and singlephasing conditions. In [23], the research is focused on fault detection based on the comparison between predicted and actual values of stator currents. In the proposed FTC method, an asymmetrical current transformation is used for stator current components, and the conventional symmetrical voltage transformation is employed for stator voltage components.…”