大功率H桥逆变器损耗的精确计算方法及其应用

任琦梅; 姜建

任琦梅,姜建.大功率H桥逆变器损耗的精确计算方法及其应用[J].电测与仪表,2014,51(14):.
Ren Qi-mei,Jiang Jian.Precise Calculation Method Of High Power H-bridge Inverter And Its Applications[J].Electrical Measurement & Instrumentation,2014,51(14):.

大功率H桥逆变器损耗的精确计算方法及其应用

Precise Calculation Method Of High Power H-bridge Inverter And Its Applications

DOI：

中文关键词: H桥逆变器开关损耗开关能量曲线双脉冲测试

英文关键词:H-bridge Inverter Switching loss Switching energy curve Double pulse test

基金项目:

作者中文名	作者英文名	单位
任琦梅	Ren Qi-mei	河南城建学院
姜建	Jiang Jian	河南城建学院

摘要点击次数: 2468

中文摘要:

大功率H桥逆变器中广泛采用IGBT作为开关器件,传统的IGBT开关损耗计算是基于供应商提供的开关能量曲线,而该曲线上所提供的开关能量与逆变器实际运行时的数据有较大出入。为此,提出了一套完整的大功率H桥逆变器的损耗分析与精确计算方法。逆变器损耗主要包括IGBT损耗和电解电容损耗,而IGBT损耗又包括导通损耗、开通损耗、关断损耗和反向恢复损耗。给出了各类损耗的定量计算方法,并且采用了双脉冲测试方法获得实际开关能量曲线,因此计算结果更加精确。搭建了一台3.45kVA的实验样机,1kHz开关频率下满载运行时,计算损耗为218W,实测损耗为210W。实验结果验证了所提出的分析与计算方法的准确性。

英文摘要:

IGBT is widely used in high power H-bridge inverter. Traditional IGBT switching loss calculation method is based on the switching energy curve provided by supplier, which is quite different from real switching energy. Therefore, a precise calculation method of high power H-bridge inverter was proposed. The power loss of inverter was composed of IGBT power loss and capacitor power loss, and the IGBT power loss was composed of conduction power loss, turn-on power loss, turn-off power loss and reverse recovery power loss. Calcution method of different power loss was presented and real switching energy curve was obtained using double pulse test resulting of more precise calculation. Finally, a 3.45kVA prototype was build, and the calculated power loss is 210W while the measured power loss was 210W under 1kHz switching frequency at full load. The experimental result verifies the accuracy of the proposed method.

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