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MATLAB/SIMULINK를 이용한 전동기 가변속 구동시스템 모델링 및 시뮬레이션
정삼용(S.Y Jeong),최연옥(Y.O Choi),한엄용(U.Y Han),오금곤(G.K Oh),정수복(S.B Jung),조금배(G.B Cho) 전력전자학회 1997 전력전자학술대회 논문집 Vol.1997 No.-
The variable speed drive system of a elecric motor is popular in industry due to its economical aspect and simplicity of implementation, comaparing with a steam turbine or the other engine driven. For a large pumping load like a feedwater pump rated about or more than 20,000kW, a synchronous motor could be primarily considered .<br/> In this paper, we studied the modelling of a variable speed drive system consisted with a load commutated inverter(LCI) and a brushless sailent pole rotor synchronous motor(SM) using MATLAB/SIMULINK.<br/> Simulation was performed with a small SM motor parameters.
정삼용(S.Y.Jeong),이진섭(J.S.Lee),서진연(J.Y.Seo),김동휘(D.H.Kim),최연옥(Y.O.Choi),조금배(G.B.Cho) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
Indirect vector control for induction motors requires the use of observers for estimation or observation of rotor flux magnitude and position In this paper, authors describe the induction motor vector control and introduce a nonlinear observer, named ELO(extended Luenberger Observer), without simulation results as a preliminary work for trial application Normally, design of nonlinear observer need coordinate transformation and linearzation through solving the partial different equation However, ELO requires minimal solution of nonlinear partial differential equation Simulation was performed by under the evironment of Matlab and Simulink without the proposed observer because we are still working Simulation was performed with conventional flux observer, a dc-ac inverter modulated by SVPWM technique, a vector controller armed with multiple PI controllers.<br/> <br/>
오금존(KG. Oh),조금배(G.B. Cho),김재민(J.M. Kim),조진섭(J.s.Cho),정삼용(S.Y. Jeong) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
In this paper, author describe the simulation results concerning the period doubling bifurcation route to chaos of DC/DC boost converter under current mode control to show that it is common phenomena on switching regulator when parameters are improperly chosen or continuously varied beyond the ensured region by system designer. Bifurcation diagrams of periodic orbits of inductor current and capacitor voltage of DC/DC boost converter are plotted with sampled data at moment of each clock pulse causing switching on DC/DC boost converter studied on this paper is modelled by its state space equations as per switching condition under continuous conduction mode. Current reference signal and capacitance are chosen as the bifurcation parameters and those are vaned in step for iterative calculation to find bifurcation points of periodic orbits of state variables.