Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Study on the Thermo-flow Analysis of ISG (Integrated Starter and Generator) Driving Inverter

ISG 구동용 인버터의 열유동 해석에 관한 연구

  • Kim, Dae Geon (Green Car Powertrain R&D Division, Korea Automotive Technology Institute) ;
  • Kim, Sung Chul (Green Car Powertrain R&D Division, Korea Automotive Technology Institute)
  • 김대건 (자동차부품연구원 그린카파워트레인연구본부) ;
  • 김성철 (자동차부품연구원 그린카파워트레인연구본부)
  • Received : 2012.11.15
  • Accepted : 2013.01.01
  • Published : 2013.09.01
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Abstract

Recently, many vehicles have applied electric parts for saving fuel consumption and reducing levels of environmental pollution. ISG (integrated starter & generator) is one of main electric parts and can improve fuel efficiency by using idle stop & go function and regenerative braking system. However, if ISG driving inverter works under the continuously high load condition, it will make the performance and durability of the inverter decreased with rising temperature. In this study, we carried out the analysis on the fluid flow and thermal characteristics of the inverter. As a result, we found the MOSFET of the air cooled inverter was increased up to $116^{\circ}C$ over the limit temperature. On the other hand, the liquid cooled type inverter's MOSFET was decreased by about $17^{\circ}C$ compared to that of the air cooled inverter. Therefore, we verified the feasibility of the liquid cooled type using the present cooling structure.

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References

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