Comparative analysis of the operating performance, magnetic field, and temperature rise of the three‐phase permanent magnet synchronous motor with or without fault‐tolerant control under single‐phase open‐circuit fault

Abstract

Abstract In the power transmission system, the semiconductor device in the inverter is one of the main fault points. When the open‐ or short‐circuit fault occurs in the semiconductor device, the motor can be turned into the operation with open‐phase fault. To take into account the non‐ideal factors existing in the calculation, this study establishes a system‐level calculation model including the permanent magnet synchronous motor (PMSM), inverter, and different control strategies, which is used to analyse the operating performance of the PMSM with or without fault‐tolerant control under single‐phase open‐circuit fault. In addition, based on the finite element method, the current fault characteristic and the change of the internal magnetic field distribution before and after the fault are studied, and the temperature rise of the PMSM with and without fault‐tolerant control is compared. The aim of this study is to compare the operating performance of the three‐phase PMSM under two common fault conditions, and quantitatively give the variation range of magnetic flux density and temperature rise. The theoretical analysis in this study is verified by building a systematic experiment platform.