EV and HEV Motor Development in TOSHIBA

Abstract

Hybrid electric vehicles (HEVs) and electric vehicles (EVs) improve the efficiency of a drive and reduce CO₂ emissions by regenerative braking and operating the engine under optimum conditions. To minimize the driving units, the motor size should be decreased and the maximum torque should be increased. Therefore, motors employing permanent magnets have been commonly used recently. For HEV and EV motors, Toshiba developed a motor that delivers a high reluctance torque, known as PRM, and has been applying it to various vehicles. This paper describes the current motor development status in TOSHIBA.