[ Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 31, No. 3, pp.185-190

ISSN: 2508-5107 (Online)

Print publication date 15 Jun 2022

Received 12 May 2022 Revised 24 May 2022 Accepted 31 May 2022

DOI: https://doi.org/10.7735/ksmte.2022.31.3.185

전기자동차용 구동모터 오일 냉각 순시해석

신현장^a^{, *} ; 김래은^b

Transient CFD Analysis of Oil-Cooled Traction Motors for Electric Vehicles

Shin Hyun Jang^a^{, *} ; Rae Eun Kim^b

aMechanical Engineering, Yonam Institute of Technology
bIntelligent Mechatronics Research Center, Korea Electronics Technology Institute

Correspondence to: ^*Tel.: +82-55-751-2077 E-mail address: shin7@snu.ac.kr (Shin Hyun Jang).

Abstract

Typical traction motors of electric vehicles utilize water jacket-based or air-based cooling. Currently, lightweight traction motors are preferred to extend the range of electric vehicles. As a result, direct cooling techniques have garnered significant attention from researchers. Direct coil-based cooling methods are of two types: oil injection type and oil spraying type. Direct oil-based cooling methods exhibit high cooling capacities. In this study, we investigate the transient increments in temperature in 160 KW traction motors. To this end, the power losses of motors were estimated using JMAG software . Using two-phase computational fluid dynamics (CFD) simulation over a duration of 18 s, the transient increase in temperature was predicted . The CFD predictions agreed well with the experimental observations, with an error less than 5%. We expect that the conclusions of this study will contribute to the improvement of the cooling performance of 160 KW traction motors.

Keywords:

2 phase fluid analysis, CFD, Oil cooled motor, EV traction motor

Acknowledgments

이 연구는 산업통상자원부(MOTIE)와 산업기술평가관리원(KEIT)의 연구비 지원에 의해 수행됨(No.20010437).

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Hyun Jang Shin

Professor in the Department of Mechanical Engineering, Yonam Institute of Technology. His research interest is a Motor Sound and Vibration reduction and FEA.

E-mail: shin7@yc.ac.kr

Rae Eun Kim

A Senior Researcher of KETI. His main research topic is a Motor Design and FEA.

E-mail: kre2567@keti.re.kr