Cost-Effective Three-Phase PMSM Drive Tolerant to Open-Phase Fault

Abstract

This paper presents a low-cost fault-tolerant system for open-phase fault in a power converter fed permanent magnet synchronous machine. The proposed fault-tolerant system is based on field orientation control with additional fault tolerance functionality. A current predictive method for open-phase fault detection is presented, together with an estimation of the threshold level for detection. The proposed method is based on the prediction of stator current for the next sampling interval. Furthermore, a new method for post-fault operation of the machine is proposed. For optimal performance of the complete drive a pre-firing angle is introduced in order to avoid the temporary generation of negative torque. This improvement increases the average generated post-fault electromagnetic torque, and consequently it reduces the mechanical stress on various machine parts. The proposed fault detection and postfault operation solutions were simulated in Matlab, and they were also tested on an experimental setup. The results show several advantages of the proposed fault-tolerant solution, like its short fault-detection time, substantial robustness against variation of machine parameters or load fluctuations, and negligible implementation costs, since no hardware modifications are needed. The fault detection algorithm does not require high computing power, and it operates well even during transients.

Design and Implementation of a Speed-Loop-Periodic-Controller-Based Fault-Tolerant SPMSM Drive System

“…A fault-tolerant SPMSM drive system, thus, can be achieved. A performance index is established to identify if the SPMSM drive system failed [7]. During normal operation, the square magnitude error is calculated as follows:…”

Real‐time open‐switch fault diagnosis in automotive permanent magnet synchronous motor drives based on Kalman filter

“…Therefore, an effective OSF diagnosis method must be added to the drive control unit by the end‐user. To this end, a large number of approaches have so far been proposed [4–28]. Some good review papers and surveys regarding the IGBT fault diagnosis methods in the voltage‐source inverters (VSIs) of PMSM drives can also be found in the literature [2–4].…”

An Embedded Closed-Loop Fault-Tolerant Control Scheme for Nonredundant VSI-Fed Induction Motor Drives

“…However, PTC is a closed-loop control scheme without modulator and axes transformation. Therefore, current-based fault diagnosis methods designed for open-loop control schemes such as scalar (v/f ) control are not quite effective [24], together with ones which need axes transformation [22], [25]. Therefore, new fault diagnosis method for PTC must be developed.…”