Modeling and Control of Multi-phase Motor Fed by Multi-level Inverter for Electric Vehicles

The automotive industry is undergoing an electrification revolution with the adoption of Electric Vehicles (EVs) worldwide. EVs, powered by electric motors, traction inverters, and rechargeable batteries, offer significant benefits in energy efficiency and emissions reduction. Reliability is crucial in pow-ertrain systems. Multi-phase electric motors are gaining attention for their enhanced performance, fault tolerance, and efficiency. Simultaneously, EVs manufacturers are adopting higher-voltage batteries for reduced current, increased power density, and faster charging. Multi-level inverters, such as the Cascaded H-bridge (CHB) topology, provide higher efficiency and better waveform quality compared to two-level inverters. This paper presents a modelling and control methodology for a Five-phase Interior Permanent Magnet Synchronous Motor (5P-IPMSM) fed by the Seven-level Cascaded H-bridge (7L-CHB) inverter in a high-power, high-reliability traction system.