Comparison of Two Versions of Electric Motors Used in a Drivetrain of an Electric Car

摘要

Permanent magnet synchronous motors (PMSM) dedicated for use in electric traction drives or in automotive vehicles are characterized by a high efficiency, a high maximal to nominal torque coefficient and by a wide range of speed control. The motor was designed in two versions: with magnets mounted on the rotor surface and with magnets mounted inside the rotor magnetic core. The static characteristics obtained from laboratory tests carried out on prototype of PMSM are presented. The motor is main drive of small electric car.