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파력발전시스템의 간이 설계를 통한 파력발전용 리니어 발전기 설계에 관한 연구
김현우(Hyunwoo Kim),박예지(Yeji Park),장형관(Hyungkwan Jang),양대현(Daehyeon Yang),이주(Ju Lee),원성홍(Sung-Hong Won) 대한전기학회 2021 전기학회논문지 P Vol.70 No.1
In this paper, the design of linear generator for wave energy conversion is studied through wave energy system design. The wave energy system is designed through the mass and spring system. In the designed wave energy system, the specification of permanent magnet linear synchronous generator (PMLSG) is obtained using the principle of energy conversion. The basic design of PMLSG is performed considering the constraint of wave energy system considering the resistance load using the external circuit. Furthermore, the detent force of PMLSG is optimized using the parametric analysis. As a result, the PMLSG is designed considering the design of the wave energy system and optimization of the detent force.
영구자석 동기전동기의 파라미터에 따른 오프라인 Inter-turn 고장진단 특성에 대한 연구
김현우(Hyunwoo Kim),박예지(Yeji Park),오승택(Seoung-Taek Oh),장형관(Hyungkwan Jang),배재남(Jae-Nam Bae),이주(Ju Lee) 대한전기학회 2020 전기학회논문지 Vol.69 No.10
This paper analyzes the characteristic of an inter-turn fault diagnosis according the parameter of permanent magnet synchronous motor (PMSM). If the inter-turn fault occurs in PMSM, the d-axis current is different from the d-axis current in the healthy condition. Through the difference between the d-axis current in the healthy and faulty condition, the inter-turn fault can be detected. Consequently, the magnitude of the d-axis current determined the characteristic of the inter-turn fault diagnosis. The offline diagnosis was performed by applied voltage into the PMSM. The performance of the offline diagnosis depended on the parameter of the PMSM. Thus, the performance of the offline diagnosis was analyzed according parameter of the PMSM that is fault resistance, winding resistance and saliency ratio. In addition, to verify analytical method, inter-turn fault diagnosis is performed by co-analysis that was the link between the finite element analysis (FEA) and the control simulation tool.