New type of switched reluctance motor was applied to electric vehicle. Considering the electromotor as vibration source, stimulation of electromotor was analyzed in particular orientation. Expressions of radial force and torque variance were obtained by analytical method. During the course of system analysis of electric vehicle and SR electromotor, both radial force of SR electromotor and torque variance were considered. It was concluded that there are direct relationships between amplitude and initial phase in vertical orientation by numerical analysis. There are maximum and minimum of amplitude, and the way to ensure them was proposed. New reliable foundation was put forward to solve vibration problems of design and control of SR electromotor.