• Title/Summary/Keyword: Motor conductive thermal analysis

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Thermal analysis model for electric water pumps with non-conductive cooling liquid (비전도성 충진액을 포함하는 전동워터펌프 열 해석 모델)

  • Jung, Sung-Taek;Yoon, Seon-Jhin;Ha, Seok-Jae
    • Design & Manufacturing
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    • v.16 no.2
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    • pp.46-52
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    • 2022
  • As the consumer market in the eco-friendly vehicle industry grows, the demand for water pump in a electric car parts market. This study intend to propose a mathematical model that can verify the effect of improving thermal properties when a non-conductive cooling filler liquid is introduced into an electric vehicle water pump. Also, the pros and cons of the immersion cooling method and future development way were suggested by analyzing the cooling characteristics using on the derived analysis solution. Thermal characteristics analysis of electric water pump applied with non-conductive filler liquid was carried out, and the diffusion boundary condition in the motor body and the boundary condition the inside pump were expressed as a geometric model. As a result of analyzing the temperature change for the heat source of the natural convection method and the heat conduction method, the natural convection method has difficulty in dissipating heat because no decrease in temperature due to heat release was found even after 300 sec. Also, it can be seen that the heat dissipation effect was obtained even though the non-conductive filling liquid was applied at the 120 sec and 180 sec in the heat conduction method. It has proposed to minimize thermal embrittlement and lower motor torque by injecting a non-conductive filler liquid into the motor body and designing a partition wall thickness of 2.5 mm or less.

The Experimental heat transfer Analysis of a High torque and low speed direct drive rotary motor (고토크 저속 직접 구동식 회전 모터의 열특성 분석)

  • Jung, Moon-Kyung;Lee, Sang-Min;Choi, Moon-Suk;Um, Suk-Kee
    • Proceedings of the SAREK Conference
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    • 2009.06a
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    • pp.1391-1396
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    • 2009
  • The direct drive motor used in a precision motion rotate at about 1/10 speed and high torque comparing with general rotary motor. Excessive heating of the coils cause an exacerbating the heat problems and reducing the performance of motor. Because the rotation speed of the rotor and surrounding air is low, the motor can not be inefficiently cooled, the thermal analysis in the motor is very important. As the variations of rotation speed and torque, the temperature of several parts is measured and the features of the heat transfer is analyzed and improved.

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PRELIMINARY ON-ORBIT THERMAL ANALYSIS FOR THE GEOSTATIONARY OCEAN COLOR IMAGER OF COMS (통신해양기상위성 해양탑재체 정지궤도 예비 열해석)

  • Kim, Jung-Hoon;Jun, Hyoung-Yoll;Han, Cho-Young
    • Journal of computational fluids engineering
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    • v.15 no.1
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    • pp.24-30
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    • 2010
  • A preliminary thermal analysis is performed for the optical payload system of a geostationary satellite. The optical payload considered in this paper is GOCI(Geostationary Ocean Color Imager) of COMS of Korea. The radiative and conductive thermal models are employed in order to predict thermal responses of the GOCI on the geostationary orbit. The results of this analysis are as follows: 1) the GOCI instrument thermal control is satisfactory to provide the temperatures for the GOCI performances, 2) the thermal control is defined and interfaces are validated, and 3) the entrance baffle temperature and shutter wheel motor gradient are found slightly out their specification, therefore further detailed analyses should be continued on these elements.