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논문 기본 정보

자료유형
학술대회자료
저자정보
Ed Joshua Manalac (Yeungnam University) Myeong Hyeon Park (LG Electronics) Sung Chul Kim (Yeungnam University)
저널정보
대한설비공학회 대한설비공학회 학술발표대회논문집 대한설비공학회 2024년도 동계학술발표대회 논문집
발행연도
2024.11
수록면
355 - 358 (4page)

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초록· 키워드

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Thermal management of electric motors of electric vehicles under transient and real-world driving conditions is essential for optimal performance and efficiency. In this research, thermal analysis of the rotational oil spray cooled in-wheel motor under transient and real-world driving conditions were conducted using a lumped parameter thermal network (LPTN) model based on computational fluid dynamics (CFD) that considers variable rotational speed and torque. The oil drag loss on the rotor surface, as well as the convective heat transfer coefficient (HTC) of motor components due to oil spray cooling, were determined using CFD according to rotational speed and torque. The LPTN model integrates variable heat losses (copper, iron, mechanical, and viscous losses) and HTC as a function of rotational speed and torque load. The temperatures of the motor components were predicted using the LPTN model and was compared with CFD results. The average temperature prediction error in the coil was 0.93%, and 3.95% in the magnets. Transient thermal analysis under the worldwide harmonized light vehicles test procedure (WLTP) class 3B drive cycle and Urban Dynamometer Driving Schedule (UDDS) cycle repeated five times was also conducted. In the WLTP class 3b cycle, the maximum temperature exhibited by the coil and the magnet was 89.4°C and 83.09°C, respectively. While in the UDDS cycle, the coil has a maximum temperature of 88.67°C, while the magnet has 79.3°C. In both drive cycles, the oil cooling system was able to maintain the temperatures of the coil and magnet within their operating temperatures.

목차

Abstract
1. Introduction
2. Numerical Simulation
3. Results and Discussion
4. Conclusions
References

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