Synchronous Optimal Pulsewidth Modulation for High-Power AC Motor Drives: A Review

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Abstract
Electric vehicles require high-power machines, so reducing power loss becomes crucial. Compared to space vector modulation, synchronous optimal pulse width modulation (SOP) has several advantages in high-speed applications, like the capability to operate at a very low switching frequency with lower total harmonic distortion, and reduced losses. This article presents a comprehensive review after performing a systematic investigation on different inverter topologies, including two-level voltage source inverters and multilevel inverter topologies with SOP as the modulation scheme. Several optimal pulsewidth methods will be studied along with SOP design methods, including steady state and dynamic switching. More emphasis is given to the various challenges faced in implementing SOP, followed by future trends.
Funding Information
  • Natural Sciences and Engineering Research Council of Canada
  • NSERC Industrial Research Chair in Electrified Powertrains
  • Canada Research Chair in Transportation Electrification and Smart Mobility

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