CAJ | 학술논문

针对四桥臂逆变器常规空间矢量脉宽调制(SVPWM)需进行坐标变换的问题,对四桥臂逆变器的SVPWM和正弦脉宽调制(SPWM)两种调制技术进行了分析,给出了一种快速数字化三维(3D)SVPWM算法,无需坐标变换,节约了计算时间;证明了常规3D-SPWM改进后,与3D-SVP-WM完全等效,两者是归一化的,而且本质上均为逆变器最优跟踪控制方程的解,可获得最大直流电压利用率.SVPWM比SPWM算法更简单,是工程应用的首选.给出了详细的仿真结果,在一台四桥臂样机上验证了结论的正确性.
침대사교비역변기상규공간시량맥관조제(SVPWM)수진행좌표변환적문제,대사교비역변기적SVPWM화정현맥관조제(SPWM)량충조제기술진행료분석,급출료일충쾌속수자화삼유(3D)SVPWM산법,무수좌표변환,절약료계산시간;증명료상규3D-SPWM개진후,여3D-SVP-WM완전등효,량자시귀일화적,이차본질상균위역변기최우근종공제방정적해,가획득최대직류전압이용솔.SVPWM비SPWM산법경간단,시공정응용적수선.급출료상세적방진결과,재일태사교비양궤상험증료결론적정학성.
Coordinate transformation is necessary in conventional spaee vector pulse width modulation (SVPWM) scheme of the fou-leg inverter. The SVPWM and sinusoidal pulse width modulation (SPWM) techniques used in four-leg inverter were analyzed in detail. A fast digital three-dimensional (3D) SVP-WM algorithm which eliminates coordinate transformation and saves calculating time was proposed. Con-ventional 3D-SPWM with improvement was equivalent to 3D-SVPWM absolutely was proved; they were two unified PWM methods. In nature, the two methods were the solutions to the optimal tracking control equation of the inverter, and maximum de-voltage utilization rate was achieved. The SVPWM should be the preferred algorithm of the four-leg inverter as its algorithm was simpler than that of SPWM. Detailed simulation results are given, and a four-leg inverter prototype is built to verify the validity of the algorithm and the conclusion of unification.