Real-Time Switches Fault Diagnosis Based on Typical Operating Characteristics of Five-Phase Permanent Magnetic Synchronous Machines

Abstract

A novel centroid-based diagnostic method of the power switches in five-leg Voltage Source Inverter (VSI) is proposed in this paper. Using a vectorial multi-machine description, a five-phase drive presenting an opened switch or an opened phase faults has typical operating characteristics in comparison to classical three-phase drives. Based on such characteristics, this work aims to provide a simple and robust diagnostic process for switches fault regardless of the shape of the back-EMFs (harmonic components) and the transient states due to the load variation. Original theoretical developments are presented. Experimental results are shown to validate the proposed strategy.

Stator Turn Fault Detection by Second Harmonic in Instantaneous Power for a Triple-Redundant Fault-Tolerant PM Drive

“…Furthermore, as demonstrated in [24], in case of inter-turn fault, the high fault current can be alleviated by applying a terminal short circuit to the fault set to nullify the external flux. The detection of open circuit, short circuit fault of switches and windings can be relatively easily implemented as discussed in [25][26][27]. However, the turn fault is potentially more challenging to be detected.…”

Speed control of Five-Phase IPMSM through PI, SMC and FITSMC approaches under normal and open phase faulty conditions

“…These motors control and supply techniques have blessed from the huge development of power electronics. Nowadays, various real-time complex controllers can be implemented using FPGAs (Field Programmable Gate Arrays) and DSPs (Digital Signal Processors) [6,7].…”

Inverter open circuit faults diagnosis in series-connected six-phases permanent magnet drive

“…INTRODUCTION ULTIPHASE machines are interesting in some industrial applications because of their inner fault-tolerance capability to some of the most common drive faults, as openswitch and open-phase faults [1]- [3]. The fault tolerance is due to the higher number of Degrees of Freedom (DoF) for control.…”

“…Regarding the multiphase systems, there are only a few works [3], [19] and [20] that address especially the FDI problem for multiphase systems especially under inverter switch faults. Therefore, a 5-phase or an asymmetric 6-phase PMSM was considered.…”

“…Therefore, a 5-phase or an asymmetric 6-phase PMSM was considered. In [3], it is shown that the inverter fault induces a fault current in the second plane (αβ2) instead of near zero component under a healthy operation of the VSI. The shape position created by the fault occurrence is used for fault detection and identification.…”