SRM representative parameters effect on in-wheel motored vehicle performance

Switched reluctance motor (SRM) has great application potential in in-wheel motor electric vehicle (IWM-EV) due to its advantages, such as a high starting torque for initial acceleration, a wide operating speed range and high efficiency to extend the battery service life. However, the new structure of IWM-EV, e.g. SRM vertical force, airgap deformation has negative effect on vehicle safety and comfort. On the other hand, the structure of IWM-EV will effect SRM vertical force and airgap, especially the representative parameters of SRM, e.g. Stator mass, rotor mass, airgap, SRM shaft stiffness, stator and rotor overlap angle, driving force of SRM. To obtain the effects of the parameters of SRM on vehicle dynamics, fully discussion is conducted from two aspects: the amplitude-frequency response comparison which is used to study SRM parameters effect on vehicle frequency response characteristic; and the parameter sensitivity analysis which is used research the trends of SRM parameters impact on vehicle performance. It is conclude that the representative parameters have different and coupling effect on IWM-EV performance.