Efficiency Evaluation of a 55kW Soft-Switching Module Based Inverter for High Temperature Hybrid Electric Vehicle Drives Application
Hu Weitao1, Sun Pengwei2
1. Hebei Electric Power Corporation Extra-High Voltage Transmission & Transformation Branch Shijiazhuang 050070 China; 2. Future Energy Electronics Center Virginia Polytechnic Institute and State University Blacksburg 24060 U.S.A.
Abstract：This paper presents a 55kW three-phase soft-switching inverter for hybrid electric vehicle drives at high temperature conditions. Highly integrated soft-switching modules are employed to achieve switching loss as well as conduction loss reduction. Detailed experimental evaluations of inverter efficiency are conducted through both inductive load and motor- dynamometer load at coolant temperatures ranging from 25℃ to 90℃. Efficiency measurement using power meter shows that the peak efficiency is around 99%, and it drops slightly at lower speed and higher temperature conditions. To ensure measurement fidelity, a double chamber differential calorimeter system is designed and calibrated for the inverter testing. Through long-hour testing, the measured efficiencies consistently show 99% and higher. The soft-switching inverter is operated reliably and demonstrated high efficiency at different temperatures and test conditions.
胡伟涛, 孙鹏纬. 55kW软开关模块化逆变器在高温混合动力电动汽车应用上的效率评估[J]. 电工技术学报, 2011, 26(1增): 97-102.
Hu Weitao, Sun Pengwei. Efficiency Evaluation of a 55kW Soft-Switching Module Based Inverter for High Temperature Hybrid Electric Vehicle Drives Application. Transactions of China Electrotechnical Society, 2011, 26(1增): 97-102.
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2011, Vol. 26 
