Optimal Design of Consequent pole SPM for Improvement Output Characteristics

Abstract

Abstract

Optimal Design of Consequent Pole SPM for Improvement Output Characteristics

by young geun MIN

under the supervision of Professor JU LEE, Ph. D.

Department of Electrical Engineering

The Graduate School of Hanyang University

Recently, as a rare earth permanent magnet having high energy density has been developed, a PMSM having a high power density has been developed. However, rare earth permanent magnets have a high price and serious environmental pollution problems that occur during the raw material refining process. In addition, due to the problems of PMSM such as soaring rare earth prices and supply instability due to the monopolistic situation of the rare earth market, the necessity of reducing rare earth usage is emerging..

In this paper, we proposed Conesequnet pole as a method to reduce the permanent magnet usage. We also compared the output characteristics of surface permanent magnet synchronous motor (SPMSM) and consequent pole permanent magnet synchronous motor (CPMSM) with consequent pole applied to SPMSM. The output characteristics were analyzed by setting the permanent magnet thickness of CPMSM as the main design variable, and the thickness that minimizes the use of permanent magnets compared to the same output was derived.

In addition, the optimum design was developed to minimize the increase in torque ripple, which is a problem that occurs when the consequent pole is applied.