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김대균(D.G. Kim),정정훈(J.H. Chung),정춘병(C.B. Chung),김성남(S.N. Kim),이승환(S.H Lee),강승욱(S.W. Kang),오봉환(B.H. Oh),이훈구(H.G. Lee),김용주(Y.J. Kim),한경희(K.H. Han) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
Since the residential load is an AC load and the output of solar cell is a DC power, the photovoltaic system needs the DC/AC converter to utilize solar cell. In case of driving to interact with utility line, in order to operate at unity power factor, converter must provide the sinusoidal wave current and voltage with same phase of utility line. Since output of solar cell is greatly fluctuated by insolation, it is necessary that the operation of solar cell output in the range of the vicinity of maximum power point. In this paper, DC/AC converter is three phase PWM converter with smoothing reactor. And then, feedforward control used to obtain a superior characteristic for current control and digital PLL circuit used to detect the phase of utility line.
BLDC 모터 구동을 위한 신경회로망 PI파라미터 자기 동조 시뮬레이터
배은경(E. K. Bae),권중동(J. D. Kwon),김태우(T. W. Kim),김대균(D. K. Kim),전지용(J. Y. Chun),이승환(S. H. Lee),이훈구(H. G. Lee),김용주(Y. J. Kim),한경희(K. H. Han) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In this paper proposed to Neural network PI self-tuning direct controller using Error beck propagation algorithm. Proposed controller applies to speed controller and current controller. Also, this built up the interface environment to drive it simply and exactly in any kind of reference, environment fluent and parameter transaction of BLDC motor. Neural network PI self-tuning simulator using Visual C++ and Matlab Simulation is organized to construct this environment. Built-u-p interface has it's own purpose that even the user who don't have the accurate knowledge of neural network can embody operation characteristic rapidly and easily.
조정민(J.M. Jho),함년근(N.Y. Harm),김대균(D.G. Kim),이상집(S.J. Lee),김성남(S.N. Kim),이훈구(H.G. Lee),한경희(K.H. Han) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
In the end of a production line a new built power converter has to undergo a series of stress tests. This can be achieved by connecting it to a dynamometer consisting of a three-phase machine joined by a rigid shaft to a DC load machine. The latter is controlled to create some specific load characteristic needed for the test In this paper a test method is proposed, in which no mechanical equipment is needed. The suggested test stand consists only of a converter to be tested and a simulator converter. Both devices are connected back-to-back on the AC-side via smoothing reactors. The simulator operates in real-time as an equivalent load Circuit, so that the device under test will only notice the behaviour of a three-phase machine under consideration of the load.<br/>