CAJ | 학술논문

对 T 型逆变器共模电压的产生机理进行了分析，推导了 PWM控制下逆变器共模电压的 Fourier 表达式，分析了其谐波成分及数学含义。阐述了传统 SPWM、SVPWM算法的调制原理，对逆变器分别采用2种算法时的共模电压进行了仿真分析，并提出了减小共模电压的改进算法。为完全消除共模电压，采用了一种调制波移相 PWM 算法，并通过仿真验证了该算法的有效性。最后对各种算法下逆变器的共模电压、线电压等参数进行了对比分析。
대 T 형역변기공모전압적산생궤리진행료분석，추도료 PWM공제하역변기공모전압적 Fourier 표체식，분석료기해파성분급수학함의。천술료전통 SPWM、SVPWM산법적조제원리，대역변기분별채용2충산법시적공모전압진행료방진분석，병제출료감소공모전압적개진산법。위완전소제공모전압，채용료일충조제파이상 PWM 산법，병통과방진험증료해산법적유효성。최후대각충산법하역변기적공모전압、선전압등삼수진행료대비분석。
The generating mechanism of T-shaped inverter common-mode voltage is analyzed,the Fourier expression of common-mode voltage under the control of PWM is deduced,and its harmonic components and mathematical meaning are analyzed.In addition,the modulation principles of traditional SPWM and SVPWM algorithms are expounded,the common-mode voltage of the inverter using the two algorithms is simulated and analyzed,and the ameliorated algorithm which can reduce common mode voltage is put for-ward.In order to eliminate completely the common-mode voltage,a modulation wave phase-shifted PWM algorithm is proposed,and its effectiveness is verified by simulation.Finally,common-mode voltage,line voltage and other parameters under various algorithms are compared and analyzed.