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전류위상 변화 시 고정자 권선방법에 따른 이중 3상 영구자석 동기 전동기의 특성 해석
김태형(Tae Heoung Kim) 한국전기전자학회 2020 전기전자학회논문지 Vol.24 No.2
효율 및 제어성이 우수한 영구자석 전동기는 최근 자동차 조향장치 시스템용으로 많이 응용되고 있으며, 인버터 고장 발생 시에도 일정시간 운전이 가능하여 안전성과 신뢰성을 확보할 수 있도록 다양한 형태의 이중 3상 구조의 고정자 권선방법을 적용하고 있다. 본 논문에서는 진상 및 지상의 전류위상 변화 시 각각의 권선방법이 전동기 특성에 미치는 영향을 유한요소해석을 통해 분석하고, 그 결과 이중 3상 고정자 권선을 갖는 동기전동기 설계 시 특성 측면에서 가장 적절한 권선방법을 선정할 수 있도록 설계전략을 제시한다. 구체적으로 토크 및 효율 측면과 약계자 제어를 통한 정출력 영역 확대 측면, 그리고 저진동 및 저소음을 위한 토크 리플 저감 측면에서 각각 유리한 권선방법을 제시한다. A Permanent Magnet Synchronous Motor (PMSM) for an electrical power steering system (EPS) is adopting various dual three-phase type stator windings to get the high fault tolerance capability when the motor runs at the failure condition. In this paper, we analyze the effects of stator winding arrangements on the characteristics such as torque and efficiency of the PMSM with leading and lagging current angle variations using finite element method. As a result, the most valuable design criteria are proposed to select stator winding method. Especially, we suggest the most appropriate winding method in terms of torque and efficiency, extending constant output area and decreasing noise and torque ripples.
12-Slot 10-Pole 분수 슬롯을 갖는 영구자석 동기 전동기의 고정자 권선 방법에 따른 철손 특성 해석
김태형(Tae Heoung Kim) 한국자기학회 2018 韓國磁氣學會誌 Vol.28 No.1
A fractional-slot permanent magnet synchronous motor under 180 degree sinusoidal current can be adopted for the electric power steering system of hybrid and electric vehicles. This motor has various stator winding methods such as double-layer and single-layer for its purpose. In this paper, we investigate the iron losses characteristic of the permanent magnet synchronous motor according to the various winding methods. To get the accurate hysteresis and eddy-current losses, we consider the time harmonics of the instantaneous flux density using finite element method. From the analysis results, we know that the most of the iron losses are generated in the stator and the stator teeth shoe part has the highest iron losses density because of its rotating magnetic flux. Under the light and the rated load, the single-layer has less iron losses compared to the double-layer. However, as the load increases, the iron losses in the singlelayer rapidly become larger. This is because the magnetic circuits are saturated.
헤어핀 권선이 적용된 IPMSM의 구동 속도별 고정자 슬롯 형상 파라미터 변화에 따른 AC동손 민감도 분석
정상근(Sang-Geun Jeong),김태형(Tae Heoung Kim),강동우(Dong-Woo Kang) 대한전기학회 2021 전기학회논문지 P Vol.70 No.4
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.
정진우(Jin-Woo Jung),김태형(Tae Heoung Kim) 대한전기학회 2011 전기학회논문지 Vol.60 No.5
This paper proposes a new adaptive speed controller to achieve a robust speed control of a permanent magnet synchronous motor(PMSM). The proposed adaptive regulator does not require any information on the motor parameter and load torque values, so it is very insensitive to model parameter and load torque variations. Also, the stability of the proposed adaptive control system is proven. To validate the robustness of the proposed adaptive speed controller, both simulation and experimental results are provided under motor parameter and load torque variations. It is clearly demonstrated that the proposed adaptive regulator can accurately control the speed of permanent magnet synchronous motors.