Title of article :
Space Vector Pulse Width Modulation with Reduced Common Mode Voltage and Current Losses for Six-Phase Induction Motor Drive with Three-Level Inverter
Author/Authors :
Zandzadeh, M. J. Department of Electrical Engineering - Faculty of Engineering - Shahid Chamran University of Ahvaz, Ahvaz, Iran , Saniei, M. Department of Electrical Engineering - Faculty of Engineering - Shahid Chamran University of Ahvaz, Ahvaz, Iran , Kianinezhad, R. Barkhat Institute of Higher Education, Ahvaz, Iran
Abstract :
Common-mode voltage (CMV) generated by the inverter causes motor bearing failures in
multiphase drives. On the other hand, presence of undesired z-component currents in six-phase
induction machine (SPIM) leads to extra current losses and have to be considered in pulse width
modulation (PWM) techniques. In this paper, it is shown that the presence of z-component
currents and CMV in six phase drive system are two major limiting factors in space vector
selection. The calculated voltage space vectors for both symmetrical and asymmetrical SPIM
drive system with three-level inverter are illustrated in the decoupled subspaces and described in
terms of undesirable voltage components and CMV value. Several space vector pulse width
modulation (SVPWM) techniques are investigated based on CMV and z-component currents
generation. Then, a modified SVPWM technique with minimum current distortion, undesired
current components and CMV with a modest torque ripple is proposed based on the simulation
results.
Keywords :
Space Vector Pulse Width Modulation , Common Mode Voltage , Current Losses , Six-Phase Induction Motor , Three-Level Inverter
Journal title :
International Journal of Engineering