三电平变换器PWM控制通态损耗分析.pdf

电气传动 2009年第39卷第11期 ELECTRTCDRIVE2009V01．39No．11 三电平变换器PWM控制通态损耗分析 陈权，王群京，郑常宝 (安徽大学教育部电能质量工程研究中心，安徽合肥230039) 摘要：为了进一步优化变换器的热设计，分析研究了电压源中点钳位式三电平变换器的通态损耗，并提供 了分析多电平变换器通态损耗的思路：根据电流、电压关系确定器件导通规律，进而求出器件通态占空比，并 在此基础上推导出用于分析计算的通态损耗表达式。由所推导的表达式对正弦脉宽调制和空间矢量脉宽调 制下的三电平变换器通态损耗进行了分析比较，并得到一些有意义的结论。 关键词：三电平变换器；正弦脉宽调制；空间矢量脉宽调制；通态损耗 中图分类号：TM464 文献标识码：A ofConductionLOSSesinThree-levelConverterwithPWMControl Analysis CHENQuan，WANG Qun-jing，ZHENGChang-bao (Potter ResearchCenter Education，Anhui 230039，Anhu／，China) QualityEngineering Ministryof University，Hefei lossesfor Abstract：Forthermalconsideration，theconduction optimumdesign was -levelPWM sourceconverter and voltage investigated。and孤effectivestraightwayconduction—loss—analysis methodwas conductionlosses arederivedbasedonthe ofconduction presented．The expressions knowledge devices，whicharedeterminedthe condition，andtheconduction methodcanbeU— by working dutycycle．This to tilizedcalculateconductionlossesfordifferentPWMmodulation PWM(SPWM)and strategies．Sinusoidal lossesinthetran- vector arediscussedwiththecalculationsforconduction space PWM(SVPWM)techniques sistors，diodesandthecontrol conclusionscanbecometo tOthe system．Someinteresting accordinganalysis and compare． words：three-level PWMI vectorPWM；conductionlosses Key converter；sinusoidalspace 运行模式，这里