Synchronous reluctance motor design based EV powertrain with inverter integrated with redundant topology

A doubly three-phase fed synchronous reluctance machine (SynRM) using a full integrated H-bridge power converter topology for each phase is designed for electrical vehicle (EV) powertrain applications. The proposed motor and EV powertrain design consists of redundant motor and power converter, improving security and safety of the overall system. The main objective of this SynRM is to be able to provide instantaneous power and high power density, high torque at low speeds and high power at high speeds, wide speed range, high efficiency over its entire operating range, high efficiency regenerative braking, robustness reliability, high safety and security system at reasonable cost. Under these requirements a 60 kW, 9000 r.p.m. and 400 N.m. SynRM prototype has been designed. The SynRM powertrain thermal design is verified using finite difference method and by Solidworks flow simulation software. A prototype has been built to verify the motor design and the high efficiency of the SynRM based EV.

I. Introduction

More reliability in powertrain is required for EV applications in order to satisfy the constantly increasing demand. Multi-phases and doubly-fed machines have become necessary to increase the reliability of the machine [1]–[2].