标题：Hybrid Selective Harmonic Elimination PWM for Common-Mode Voltage Reduction in Three-Level Neutral-Point-Clamped Inverters for Variable Speed Induction Drives
期刊名称：International Journal of Engineering and Computer Science
印刷版ISSN：2319-7242
出版年度：2013
卷号：2
期号：10
页码：3026-3034
出版社：IJECS
摘要：This paper proposes a hybrid selective harmonic elimination pulsewidth modulation (SHEPWM) scheme forcommonmode voltage reduction in three-level neutral-point-clamped inverter-based induction motor drives. The scheme uses theconventional SHEPWM (C-SHEPWM) to control the inverter at high frequency (≥ 0.9 motor rated frequency) and uses themodified SHEPWM (M-SHEPWM) to control the inverter at low frequency. It also uses a scheme to ensure the smooth transitionbetween the two SHEPWM schemes. As a result, at high frequency, the C-SHEPWM provides the required high modulation indexfor the motor, while at low frequency, when a passive filter is less effective for common-mode voltage reduction, the MSHEPWMis used to suppress the common-mode voltage. Experimental results show that the proposed hybrid SHEPWM schemecould meet the modulation index need of the motor and reduce the common-mode voltage in the drive, and the two SHEPWMschemes could transition smoothly
