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그린카용 인버터 전력모듈의 열전달 해석 및 평가에 대한 연구
김철수(Chulsoo Kim),이준호(Junho Lee),이기수(Geesoo Lee),이홍섭(Hongseop Lee),김찬중(Chanjung Kim),이봉현(Bonghyun Lee) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Since the high-powered power modules for use in motor inverter and DC-DC converter of green cars such as xEVs require the power chips of higher current and thermal density, it is very important to design the power chips considering to its effective thermal dissipation path. Thermal resistance is a key factor in the power module package design for the effective thermal dissipation path from its junction to base plate. Generally the more the thermal resistance decreases, the more the allowable dissipation power and current increase. The thermal resistance of the power module largely depends on the thermal properties of a direct bond copper material. In this paper temperature rise characteristic and thermal resistance are evaluated through the heat transfer analysis on the 2-pack power module for use in inverter of the green car. The experimental measuring method of the thermal resistance referred to the international testing standard is introduced. The heat transfer analysis is conducted about the various direct bond copper materials of the power module package with the commercial code.
하이브리드 자동차의 직류변환장치(LDC) 성능 및 신뢰성 평가에 대한 연구
김철수(Chulsoo Kim),박광민(Gwangmin Park),지성원(Sungwon Ji),김찬중(Chanjung Kim),이봉현(Bonghyun Lee) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Low DC-DC converter(LDC) in HEV plays a role in charging the auxiliary battery as a low voltage from the main battery charged to the electric driving motor"s regenerative energy during deceleration and braking of the vehicle. The charged auxiliary battery supplies power to the electronics such as headlamps, air conditioner, power windows, and electric power steering. LDC"s output of degradation and failure in the vehicle can have severe impact on various electronics during driving. LDCs for HEVs compared to general industrial DC-DC converters need to meet the performance of high-efficiency power conversion, vibration, and heat resistance properties and EMI to ensure the reliability within the limited volume to be mounted in the vehicle. In this paper, reliability assessment and performance evaluation factor are established for developing the LDC in HEV. Also the performance testing and analysis about the conventional LDC currently used in a HEV is performed on the status of the vehicle and device. The result will be uesd to compare the developed LDC"s performance.