Analysis of Joule-heat Characteristics according to the DC-link Capacitor Film Geometrics

DC-link Capacitor필름 형상에 따른 Joule-heat특성 분석

  • Jeon, Yong Won (Department of Mechanics Engineering, Kongju National University) ;
  • Kim, Young Shin (Industrial Technology Research Institute, Kongju National University) ;
  • Jeon, Euy Sik (Department of Mechanical & Automotive Engineering, Kongju National University)
  • 전용원 (공주대학교 기전공학과) ;
  • 김영신 (공주대학교 생산기술연구소) ;
  • 전의식 (공주대학교 기계자동차공학부)
  • Received : 2020.03.05
  • Accepted : 2020.03.18
  • Published : 2020.03.31


As global warming accelerates, eco-friendly electric cars are being developed to reduce carbon dioxide emissions, and power conversion inverters are used to drive motors. Among inverter components, DC-link capacitor is heated by high current usage, which causes problems such as performance and life-saving of inverter. Although metal cases with good thermal performance have been used to solve this problem, it is difficult to apply them in practice due to insulation problems with other parts. In this paper, the Heat-Generation influence factor of DC-link capacitor is analyzed. Variables on heat-generation are set at 3 levels for film width, inductance, and film thickness. Box-Behnken to 13 tests using the design and minimal deviations, e.g. through the experiment three times by each level. The surface of the film k type by attaching the sensor current is measured temperature. Capacitance was set to a minimum level of 200 ㎌ and had a frequency of 16 kHz with Worst case, ambient temperature of 85℃ and a ripple current of 50 Ams was applied. The temperature at the measurement point was collected in the data logger after sampling at 1 minute intervals for 2 hours after saturation with the ambient temperature. This experiment confirmed that setup factors are correlated with heat-generation.



Supported by : 중소벤처기업부


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