Optimal design of a 314kW-class IPMSM for railway vehicles using hydrogen fuel cells

Taehyung Kim,Ik-Hyun Jo,Chan-Bae Park,Jae-Hyeon Lim,Geochul Jeong,Hyung-Woo Lee

doi:10.1063/1.5130415

Abstract

Conventional diesel railway vehicles produce many air pollutants. In order to solve this problem, railway vehicles using eco-friendly hydrogen fuel cells are emerging. The main difference from the conventional traction motor is that it does not control the phase back electromotive force (phase-BEMF) separately at the maximum speed. Because of this, it should reduce the use of permanent magnets yet increase their size due to necessary high current. This paper performs the interior permanent magnet synchronous motor (IPMSM) design to meet the harsh electrical and mechanical constraints. Although the basic design is carried out to satisfy the design constraints, structural problems occur. These are resolved through the optimization process to attain the optimal design of a 314kW-class IPMSM for railway vehicles using hydrogen fuel cells.

Highlights

Railways are a mode of public transportation that will lead the future in eco-friendly transportation
The basic design is carried out to satisfy the design constraints, structural problems occur. These are resolved through the optimization process to attain the optimal design of a 314kW-class interior permanent magnet synchronous motor (IPMSM) for railway vehicles using hydrogen fuel cells
The hydrogen fuel cells/battery hybrid railway vehicle can be seen in Fig. 1 One of next-generation railway vehicle technologies is a hydrogen fuel cell vehicle that uses hydrogen as a power source and combines a rechargeable battery that can be charged using regenerative power

Summary

Introduction

Railways are a mode of public transportation that will lead the future in eco-friendly transportation. Conventional diesel railway vehicles have and continue to emit a lot of air pollution. The IPMSM in this paper is aimed at not controlling phase-BEMF at the maximum speed or during coasting. The reason for this is that unlike conventional automobiles, railway vehicles have a lot of coasting sections. It is effective to limit the phase-BEMF at the maximum speed without field weakening control. This creates a limitation on amount of permanent magnet use where a high current must be used. In order to design an IPMSM with a high output density under such electrical and mechanical constraints, this paper performs a basic design

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