CAJ | 학술논문

研究了三相逆变器的 RSPWM、AZSPWM1、AZSPWM3和 NSPWM 无零矢量共模电压抑制技术.首先,分析了不同调制策略的调制因数和参考电压矢量的工作区间,说明了 RSPWM 的工作区间较小,适用于低调制比工作场合.再次,利用理论分析和仿真方法,研究了无零矢量调制策略的直流电压利用率和输出谐波特性,并与传统 SVM 调制策略比较.结果表明,AZSPWM1、AZSPWM3和 NSPWM 调制策略能够有效地抑制三相逆变器共模电压,同时保持了较高的直流电压利用率.但相对 SVM 调制策略,三相逆变器的输出谐波含量有所增大.研究结果为三相逆变器的无零矢量共模电压抑制技术的选用及进一步研究提供了理论依据和指导.
연구료삼상역변기적 RSPWM、AZSPWM1、AZSPWM3화 NSPWM 무령시량공모전압억제기술.수선,분석료불동조제책략적조제인수화삼고전압시량적공작구간,설명료 RSPWM 적공작구간교소,괄용우저조제비공작장합.재차,이용이론분석화방진방법,연구료무령시량조제책략적직류전압이용솔화수출해파특성,병여전통 SVM 조제책략비교.결과표명,AZSPWM1、AZSPWM3화 NSPWM 조제책략능구유효지억제삼상역변기공모전압,동시보지료교고적직류전압이용솔.단상대 SVM 조제책략,삼상역변기적수출해파함량유소증대.연구결과위삼상역변기적무령시량공모전압억제기술적선용급진일보연구제공료이론의거화지도.
The common-mode suppression techniques with nonzero vector pulse width modulation (NZPWM) for three-phase inverters are studied. They are random state pulse width modulation (RSPWM), active zero state PWM1 (AZSPWM1), active zero state PWM3 (AZSPWM3) and near state PWM (NSPWM). Firstly, the operation areas of modulation factor and reference voltage vector with different modulation strategies are analyzed. The results show that RSPWM has a smaller operation area than other three NZPWM and is suitable for the application with lower modulation ratio. Secondly, the DC voltage utilization rate and output harmonic of different NZPWM are researched and compared with that of traditional space vector modulation (SVM) by using theoretical analysis and simulation. The results show that AZPWM1, AZPWM3 and NSPWM can not only suppress the common mode voltage of three-phase inverters efficiently, but also maintain high DC voltage utilization rate. However, three-phase inverters with NSPWM have the higher output harmonic comparing with the traditional SVM. The research results provide theoretical basis and instruction for the selection of common mode voltage suppression technique with NZPWM for three-phase inverters and its further study.