Experimental comparison of induction motor and IPMSM with identical stator

With electric vehicle models becoming diverse for each car manufacturer, the commonality of driving components is becoming highly necessary to enhance productivity and reduce cost. In the case of traction motors, a common method is to diversify motors by varying the stacking length according to the required power. Another method is to assemble different type of rotors with an identical stator. By this method, it can be fabricated as an interior permanent magnet synchronous motor (IPMSM) and induction motor (IM). The second method is convenient and can achieve a high component commonality. However, IMs are known for their low power densities and low efficiencies compared with permanent magnet motors. In this study, the performance of two types of motors with identical stator is compared experimentally. To demonstrate advantages and disadvantages of IM compared with IPMSM, which is widely used as a traction motor for electric vehicles, the test results are described focusing on IM.