A carrier-based unbalanced PWM method for four-leg voltage source inverter fed asymmetrical two-phase induction motor

• Main Authors: Kumsuwan Y., Srirattanawichaikul W., Premrudeepreechacharn S., Higuchi K., Toliyat H.A.
• Format: Conference or Workshop Item
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-77956537746&partnerID=40&md5=6019ed21420cb6b4ac7922a0805b52c4; http://cmuir.cmu.ac.th/handle/6653943832/1489
• Institution: Chiang Mai University

This paper presents a carrier-based unbalanced PWM method for two-phase four-leg voltage source inverter and its realization for asymmetrical two-phase induction motor. A modulation strategy is developed to synthesize unbalanced two-phase output voltage waveforms based on the unipolar modulation technique with open-loop V/f control. The proposed control scheme allows independent magnitude controllability and quadrature phase angle for unbalanced two-phase output voltages. Thus, the modulation algorithm makes the four-leg voltage source inverter inequitable with unbalanced two-phase loads. Simulation and experimental results confirm the feasibility of the control method for the inverter. © 2010 IEEE.