三相PWM整流器电路谐振过电压分析及预防  

Resonance Overvoltage Analysis and Prevention for the 3-phase PWM Rectifier Circuit

作　　者：张绍军[1] 张嘉彧[2] ZHANG Shaojun;ZHANG Jiayu(SIEMENS Factory Automation Engineering Xi'an Co.,Ltd.,Xi'an 710065,Shaanxi,China;SIEMENS Factory Automation Engineering Co.,Ltd.,Beijing 100005,China)

机构地区：[1]西门子工厂自动化工程有限公司西安分公司,陕西西安710065 [2]西门子工厂自动化工程有限公司,北京100005

出　　处：《电气传动》2021年第18期10-13,41,共5页Electric Drive

摘　　要：在三相6开关电压型PWM整流器电路的实际应用中,会发生过电压导致击穿器件绝缘的现象,而目前业界对这种现象研究较少。从新的理论机理分析,发现整流器电路进线阻抗不匹配以及电路的寄生电容电感,这两个因素引发的电路谐振是引起瞬态过电压的主要原因。基于此机理之上,针对性地提出了实用有效的预防方法,经过较多的实际现场验证,证明其对预防此类故障是有效的。There is the transient overvoltage in the 3-phase PWM rectifier circuit,so that the component insulation is broken sometimes,but the research of it is few present.From new principle,the overvoltage comes from the circuit resonance oscillation.The resonance is from two reasons:one is the unsuitable impedance match between the line supply and the drive,another is from the drive system parasitic capacitance and inductances.And on this analysis,some solutions were available to protect the PWM circuit and make it from away the transient overvoltage.After some years used in many sites,the solutions are useful.

关 键 词：三相PWM整流器 谐振 瞬态过电压 进线阻抗 寄生电容和电感 

分 类 号：TM28[一般工业技术—材料科学与工程]