Comparison of dual three-phase and six-phase surface maunted permanent magnet motor for traction drive applications

Abstract

Permanent magnet synchronous motors (PMSMs) are widely used in industrial and commer- cial applications such as electric vehicles, robotics, and aerospace, owing to their high power and torque density, operational stability, and exceptional efficiency. The integration of permanent magnets (PMs) eliminates the need for an external excitation current, thereby minimiz- ing excitation losses. Recently, six-phase motor systems have emerged as viable alternatives to traditional three- phase configurations, offering enhanced fault tolerance and improved control performance under fault condi- tions. Critical research areas for PMSMs in electric ve- hicle applications include the design and implementation of advanced control strategies to achieve high precision, reliability, and energy efficiency. This study proposes a comparative electromagnetic performance analysis of dual three-phase and six-phase surface-mounted per- manent magnet motors, utilizing both analytical and finite element methods. To further optimize the pro- posed motors, a segmented skewing technique is applied, demonstrating additional improvements in performance characteristics. This research contributes to a deeper understanding of these motor configurations for traction drive applications.