Optimization design of an interior permanent magnet motor for Electro Hydraulic Power Steering

Abstract

This paper shows the optimization design of an interior permanent magnet motor for EHPS (Electro Hydraulic Power Steering). The effect of the design parameters of the motor on the output characteristics were analyzed through a simulation of a finite element method. In addition, according to temperature of during operation it was due to the differences in the demagnetization characteristics of the permanent magnet. Therefore, it used the magnetic properties in the actual operating temperature for designing order to be not appeared demagnetization. Depending on the design parameters, final model was analyzed for the total harmonic distortion ratio of the back electromotive force, torque ripple, cogging torque. The authors derive the optimal design for system requirements.