헤어핀 권선이 적용된 IPMSM의 구동 속도별 고정자 슬롯 형상 파라미터 변화에 따른 AC동손 민감도 분석

Abstract

High-output, high-efficiency, and light-weight technologies of electric motors are attracting attention. Among related technologies, the technology of improving SFF(Slot Fill Factor), which means the ratio of the coil area to the stator slot area, enables weight reduction through high power density. As a method of improving SFF, there is a hairpin winding method using a rectangular coil. This has the advantage of high output because it takes up more slot area than when using a general round coil. However, this winding method has limitations in achieving high efficiency with AC copper loss under specific operating conditions such as high frequency and high current. Therefore, the hairpin model considering the reduction of AC copper loss can maximize its advantages. In this paper, the cause of AC copper loss is analyzed to reduce AC copper loss, and the AC copper loss sensitivity to changes in stator shape parameters and driving speed is analyzed through simulation analysis.