标题：Comparison of Selective Harmonic Elimination And Space Vector 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：2014
卷号：3
期号：10
页码：8888-8896
出版社：IJECS
摘要：This paper proposes a hybrid selective harmonic elimination pulsewidth modulation (SHEPWM) scheme forcommon mode voltage reduction in three-level neutral-point-clamped inverter-based induction motor drives. The scheme usesthe conventional SHEPWM (C-SHEPWM) to control the inverter at high frequency (≥ 0.9 motor rated frequency) and usesthe modified SHEPWM (M-SHEPWM) to control the inverter at low frequency. It also uses a scheme to ensure the smoothtransition between the two SHEPWM schemes. As a result, at high frequency, the C-SHEPWM provides the required highmodulation index for the motor, while at low frequency, when a passive filter is less effective for common-mode voltagereduction, the M-SHEPWM is used to suppress the common-mode voltage. Experimental results show that the proposedhybrid SHEPWM scheme could meet the modulation index need of the motor and reduce the common-mode voltage in thedrive, and the two SHEPWM schemes could transition smoothly
