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Dynamic Analysis of Double Excited 3-DOF Motor Modeling Using Equivalent Magnetic Circuit
류세현,신해웅,김민수,권병일 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.3
This paper implements a model of a double excited three-degree-of-freedom motor (3- DOF) coupled with a PI current controller for position control. The rotational trends of the rotor according to the applied steps are identified using a motion equation. The simulation model is a complete electrical and mechanical model of a 3-DOF motor, which mainly consists of mechanical torque equations, a nonlinear equivalent magnetic circuit, and a PI current controller. This machine is tested using the manufactured control board using the same conditions as in the simulation, where the experimental results also verify the accuracy of the simulation results.
저속 압축성 유동에 대한 국소 예조건화 기법 적용 연구
류세현,이승수,김범수,Ryu, Se-Hyun,Lee, Seung-Soo,Kim, Beom-Soo 한국군사과학기술학회 2006 한국군사과학기술학회지 Vol.9 No.2
Time marching methods are well-suited for high speed compressible flow computations. However, it is well known that the time marching methods suffer a slow down in convergence due to disparity in Eigenvalues. A local preconditioning method is one of numerical methods to enhance convergence characteristics of low mach number flows by modifying Eigenvalues of the governing equations. In this paper, the local preconditioning method of Weiss is applied to a 2 dimensional Navier-Stokes code and the efficiency of the preconditioning method is shown through a number of computational examples.
42V 자동차 EHPS용 BLDC 모터 개발에 관한 연구
류세현(Se-hyun Rhyu),김영균(Young-kyoun Kim),허진(Jin Hur),성하경(Ha-gyeong Sung) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.4
The increment of electric power demand causes interest on new higher power system such as 42V Power Net, and furthermore necessity for development of energy storage device is highlighted recently. Owing to high efficiency and easy speed control of brushless DC(BLDC) motor, the demand of BLDC motor that has high power and low noises are increasing. Especially demand of interior permanent magnet(IPM) type BLDC with high efficiency and high power in electric motion vehicle is increasing. This paper presents the design of the BLDC motor for EHPS(Electro-Hydraulic Power Steering) in 42V system and verified the characteristics by simulation and test results.