출력밀도 향상을 위한 매입형 영구자석 동기전동기의 회전자 형상 변화

Abstract

This paper presents power density improvement in accordance with rotor shape change. Prototype has design specifications which are 8 pole/48 slot, 143Nm. Prototype’s permanent magnet is buried with single layer in rotor. Proposed double layer model is changed in rotor shape for improvement of reluctance torque. Double layer model is characterized by buried double layer permanent magnet in rotor. Armature current is decreased in same torque by increase of reluctance torque. Stack length is decreased as much as a reduction ratio of armature current. Therefore, motor weight is come down and efficiency is increased as compared with prototype because of reduction of coil resistance.