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터빈 특성에 따른 외전형 영구자석형 풍력발전기의 효율 특성 비교
고경진(Kyoung-Jin Ko),장석명(Seok-Myeong Jang),박유섭(Yu-Seop Park),최장영(Jang-Young Choi),이성호(Sung-Ho Lee) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
This paper deals with efficiency characteristics comparison of wind power generator with outer permanent magnet rotor according to turbine characteristics. Since efficiency of direct-coupled permanent magnet generator for wind power application is governed by rotational speed and shaft torque characteristics of turbine for rated output power, turbine design considering performance of wind power generator is essential. In this paper, performance analysis according to wind speed is performed using electrical parameters and electromagnetic loss obtained by analytical technique. Moreover, from performance analysis of wind power generator according to three type turbine characteristics, optimized characteristic of wind turbine for direct coupled PM generator is proposed.
전자기 손실을 고려한 소형 외전형 영구자석 풍력발전기의 성능 평가 (2)
고경진(Kyoung-Jin Ko),장석명(Seok-Myeong Jang),최장영(Jang-Young Choi) 대한전기학회 2011 전기학회논문지 Vol.60 No.1
In this paper, analytical techniques for performance characteristics analysis of wind power generator with outer permanent magnet rotor are proposed. Furthermore, the proposed analytical techniques are validated by performance experiments of the manufactured generator. In this part, characteristic equations of losses such as copper loss, core loss are derived. Using the derived loss characteristic equations, electrical parameters obtained in [15] and d-q axes method, constant load and constant speed characteristics of wind power generator are analyzed. And then, to analyze performance of wind power system according to wind speed, d-q analysis model considering wind turbine characteristics is proposed. Finally, the obtained performance characteristics results are validated in comparison with those by experiments.
소용량 풍력시스템을 위한 1.5㎾급 외전형 영구자석 동기발전기의 성능 특성 해석
고경진(Seok-Myeong Jang),장석명(Kyoung-Jin Ko),최장영(Jang-Young Choi),이성호(Sung-Ho Lee),윤기갑(Gi-Gab Yoon) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.10
This paper deals with the electromagnetic performance evaluation of 1.5㎾ class synchronous generator with outer PM rotor for small-scale wind power system based on analytical solutions. This wind power generator has slotless stator for the reduction of vibration and acoustic noise through minimization of magnetic cogging torque and outer PM rotor with pole arc/pole pitch ratio, about 0.7, for the back-EMF with low total harmonic distortion. In order to evaluate electromagnetic performance, this paper proposes the various analytical techniques, such as the electromagnetic transfer relations theorem for magnetic field distribution analysis and electrical parameters calculation, and equivalent circuit method for dynamic generating characteristic analysis.
전자기 손실을 고려한 소형 외전형 영구자석 풍력발전기의 성능 평가 (1)
장석명(Seok-Myeong Jang),고경진(Kyoung-Jin Ko),최장영(Jang-Young Choi) 대한전기학회 2010 전기학회논문지 Vol.59 No.12
This paper deals with analytical techniques for performance evaluation of small scaled wind power generator with outer permanent magnet rotor. In part (1), using transfer relations theorem, magnetic field distribution characteristics by PM and armature reaction field are derived. Moreover, electrical parameters such as back-EMF, inductance and resistance are calculated from the obtained field characteristic equations. The proposed analytical techniques are validated by nonlinear finite element method using commercial software `Maxwell' and performance experiments of the manufactured generator. In part (2), generating characteristics analysis such as constant speed characteristics and constant resistive load characteristics, and performance evaluation according to variation of wind speed will be accomplished using the derived electrical parameters.
전자기 해석법에 의한 직선형 스위치드 릴럭턴스 전동기의 회로정수 도출 및 동특성 해석
박지훈(Ji-Hoon Park),고경진(Kyoung-Jin Ko),최장영(Jang-Young Choi),장석명(Seok-Myeong Jang) 대한전기학회 2010 전기학회논문지 Vol.59 No.2
This paper deals with analysis on dynamic characteristic and circuit parameter of linear switched reluctance motor by electromagnetic analytical method. Above all, using space harmonic method, which is electromagnetic method, the air-gap flux density is analyzed in the both align and unaign positions, and the inductance profile, force characteristic and resistance per phase are calculated by means of the process. The validity of the analyzed results are demonstrated by the finite element method(FEM) and manufacture of the prototype machine. Second, the dynamic simulation is analyzed by the use of circuit parameters derived from analytical method, and the operating system of the prototype machine is manufactured to demonstrated the validity of simulation analysis. As a result, it is considered that the characteristic equation suggested in this paper will contribute to the design, analysis and application of LSRM.
박지훈(Ji-Hoon Park),고경진(Kyoung-Jin Ko),박유섭(Yu-Seop Park),장석명(Seok-Myeong Jang),김일중(Il-Jung Kim) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.10
This paper deals with core loss analysis of linear switched reluctance motor. First, we presented core loss analytical model of linear switched reluctance motor(LSRM), which consists of 6pole mover and 4pole stator. And then we analyzed core loss of LSRM according to drive condition, such as tum-on position and switching interval.
손실을 고려한 영구자석형 풍력발전기의 성능 특성 해석 및 실험적 검증
장석명(Seok-Myeong Jang),고경진(Kyoung-Jin Ko),최지환(Ji-Hwan Choi),최장영(Jang-Young Choi),이성호(Sung-Ho Lee) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.4
In this paper, analytical techniques for performance characteristics analysis of wind power generator with outer permanent magnet rotor are proposed. Furthermore, the proposed analytical techniques are validated by performance experiments of the manufactured generator. First of all, characteristic equations of losses such as copper loss, core loss are derived. Using the derived loss characteristic equations and equivalent circuit method, constant load and constant speed characteristics of wind power generator are analyzed. And then, to analyze performance of wind power system according to wind speed, d-q analysis model considering wind turbine characteristics is proposed. Finally, the obtained performance characteristics results are validated in comparison with those by experiments.