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신재생 에너지 적용을 위한 고효율 영구자석 동기 전동/발전기의 해석 및 설계
유대준(Dae-Joon You),김일중(Il-Jung Kim) 대한전기학회 2011 전기학회논문지 Vol.60 No.5
In renewable energy system such as flywheel energy storage system, wind power and solar power, the motor/generator is the important key for offering the electric energy to the electric loads. For example, the heavy and large flywheel is rotated by electromagnetic torque of pemanent magnet synchronous motor (PMSM) and, in case of a breakdown of electric current, the PMSM used as generator supplies electric energy for the various electric utilities using mechanical rotation energy of the flywheel. Thus, design of a motor/generator should be performed in effort to reduce cogging torque and electromagnetic loss for high efficiency. In our paper, a slotless permanent magnet synchronous motor/generator (SPMSM/G) with output power 15kW at the rotor speed 18000rpm is designed from electromagnetic analysis and dynamic performance analysis. In analytical approach, design parameters such as back electro-motive force (back EMF), inductance and electromagnetic torque are derived from analytical method which is one of the electromagnetic analysis method. And using the design parameters, this paper deal with system design considering the driving characteristics and electric load in required power. Finally, the analytical results are verified by the experiment and finite element method (FEM).
Halbach 자화 배열 회전자를 갖는 영구자석 동기 전동발전기의 전자기적 해석 및 성능 특성
장석명(Seok-Myeong Jang),유대준(Dae-Joon You),고경진(Kyoung-Jin Ko),최상규(Sang-Kyu Choi) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.4
The rotational loss is one of the most important problems for the practical use of the high power Flywheel Energy Storage System (FESS). This rotational loss is divided as the mechanical loss by windage and bearing and iron loss by hysteresis loop and eddy current in the part of the magnetic field. So, In this paper, a double-sided PMSM/G without the iron loss is designed by analytical method of the magnetic field and estimation of the back-EMF constant represented as the design parameter. This design model consists of the double-sided PM rotor with Halbach magnetized array and coreless 3-phase winding stator. The results show that the double-sided PMSM/G without iron loss can be applicable to the high power FESS.
장석명(Seok-Myeong Jang),유대준(Dae-Joon You),최장영(Jang-Young Choi),박지훈(Ji-Hoon Park) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.4
This paper presents a analytical field solutions for the general class of Linear Brushless DC(LBLDC) motors with PM mover and 3-phase winding stator. In our magnetic field analysis, we have adopted an approach which can treat both magnetized material and winding from the each field analysis by magnetic vector potential considering 2-Dimensional slot modeling. Therefore, we give accurate analytical formulas and object function for design and parameters estimation by its magnetic field.
양측식 영구자석 가동형 슬롯리스 직선 동기전동기의 전자기 특성 및 동특성 해석에 의한 설계정수 도출
張元凡(Won-Bum Jang),兪大濬(Dae-Joon You),李成浩(Sung-Ho Lee),張錫明(Seok-Myeong Jang) 대한전기학회 2007 전기학회논문지 Vol.56 No.12
This paper presents system design of the slotless double-side Permanent Magnet Linear Synchronous Machine system (PMLSM) through magnetic field analysis and dynamic modeling. In our analysis, 2-D analytical treatments based on the magnetic vector potential were adopted to predict magnetic field with space harmonics by PM mover magnetization and stator winding current. From these, the design parameters such as inductance, Back-emf, and thrust are estimated. And, the electrical dynamic modeling including synchronous speed is completed by calculation of a DC link voltage in effort to obtain the accurate mechanical power from Space Vector Pulse Width Modulation(SVPWM). Therefore, the system design of PMLSM is performed from estimation of design parameters according to PM size and coil turns in magnetic field and from calculation of a DC link voltage to satisfy base speed and base thrust represented as the maximum output power in dynamic modeling. The estimated values from the analysis are verified by the finite element method and experimental results.