Abstract

Multiphase electric motors in cooperation with power semiconductor converters belong to the future of electric drives. This is because of their better properties compared to three-phase motors, such as better fault tolerance. How a multiphase motor will behave in a fault state is very important when using such motors in EV and HEV. This is the basis of the research in this article; we investigate the options for operating a five-phase motor in a fault condition in order to improve the drive qualities during fault operation. The complete mathematical expressions of the five-phase induction motor model in the normal operation as well as in fault operation and also the control modification to improve the properties of the drive are presented. The new five-phase field-oriented control is next described, which improves the drive qualities in four-phase operation and is the first fundamental aspect of the study. Another important aspect of the project is the development of a specific control on a real motor, followed by measurements of properties of a five-phase motor in normal and fault operation of one phase without and with control modification to enhance drive characteristics. The qualities and appropriateness of employing a five-phase motor as a drive in EV and HEV are then determined by comparing these results. Finally, a comparison of motor attributes is shown with and without control adjustment.

Highlights

  • Internal combustion engines are already being phased out in favor of electric motors.There are various reasons for switching from combustion to electric propulsion

  • The purpose of this research is to look at fault-tolerant control on a five-phase induction motor, and to bring new fault-tolerant control that will be implemented for any multiphase induction motor

  • This paper presents finite state predictive torque control (PTC) for a two-level fivephase induction motor in order to reduce the common mode voltage

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Summary

Introduction

Internal combustion engines are already being phased out in favor of electric motors. There are various reasons for switching from combustion to electric propulsion. The primary issue is the environmental pollution caused by internal combustion engines, which is greatly reduced by the usage of electric driving. Electric motors in the automotive sector are presently undergoing extensive study in order to enhance their qualities and enable the use of electric or hybrid electric cars. Three-phase motors are the most-often-utilized electric motors in electric cars [1,2,3]. The reason for this is that they have been meticulously examined, both in terms of structure and control and functioning

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