Design of Three-Phase V-Shaped Interior Permanent Magnet Synchronous Motor for Air Conditioning Compressor of Electric Vehicle

Hojin Jeong,Jeihoon Baek

doi:10.3390/app10248785

Abstract

Air conditioning system of electric vehicles has new change as the internal combustion engine is being replaced with electrified AC motor. With large amount of batteries installed at the bottom of frame, the conventional compressor, which is belt-driven, can be removed, and another AC motor can play the role for air conditioning in electric vehicles. From this change, the system efficiency would be improved since it is possible to control the electrified compressor independently from traction system in contrast with the belt-driven compressor. As a result, by applying the electrified compressor for air conditioning system, the whole system can achieve better efficiency and longer driving distance, which is most important in electric vehicles. In this paper, 3-phase interior permanent magnet synchronous motor (IPMSM) was designed using lumped-parameter model and finite element method.

Highlights

The conventional compressor installed with internal combustion engine for air conditioner is driven by being connected with a timing belt, which is so called belt-driven compressor
This sort of compressor has a disadvantage in efficiency since its operating point depends on the speed of crank shaft of engine, and the compressor is not allowed to be independently driven at desirable operating points where high efficiency is ensured
This paper investigates the characteristic trends when gradually changing rotor design of V-shaped interior permanent magnet synchronous motor (IPMSM), which has the moderate performances in copper loss, torque ripple, cost, and efficiency [20]

Summary

Introduction

The conventional compressor installed with internal combustion engine for air conditioner is driven by being connected with a timing belt, which is so called belt-driven compressor. This sort of compressor has a disadvantage in efficiency since its operating point depends on the speed of crank shaft of engine, and the compressor is not allowed to be independently driven at desirable operating points where high efficiency is ensured. In the common environments of air conditioner system, induction machine is usually fixed somewhere in factories or buildings, power density is not considered as important as in mobile machine-like electric vehicles. The type of motor that achieves high efficiency and power density is interior permanent magnet synchronous motor (IPMSM) [1,2]

Methods

Results

Conclusion