Efficiency Improvement of Interior Permanent Magnet Synchronous Motor‐Based Electric Vehicle Drive Train Using Phase‐Shedding Control Approach

ABSTRACT This paper discusses the phase‐shedding control (PSC) of an interleaved DC‐DC converter integrated with an IPMSM drive for an electric vehicle (EV) drive train. The interleaved DC‐DC boost converter (IBC) topology helps to reduce switching losses and increase the efficiency of the drive train. The efficiency of IBC tends to decrease under light load conditions due to the increased significance of switching and core losses compared to conduction losses. In order to maintain a high‐efficiency profile across a range of load variations, this work employs a PSC strategy with average current mode control (ACMC) designed for IBC. The core objective of the PSC approach is to dynamically adjust the number of operational phases in response to variations in motor load. The IBC can improve the motor drive's high‐speed driving performance by producing a variable and augmentable DC‐link voltage as EVs demand. Additionally, space vector modulated field‐oriented control (SVMFOC) with maximum torque per ampere (MTPA) is employed to govern the IPMSM motor, leading to high‐speed driving performance. The proposed approach has been implemented in dSPACE for 2‐kW EV drive train. Experimental results are presented to demonstrate the effectiveness of the proposed approach.