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박건태(G.T.Park),김재형(J.H.Kim),차득근(D.G.Cha),신병철(B.C.Shin),강경호(K.H.Kang),정응용(E.Y.Jung) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
To get high effi챠ency in variable speed control of induction motor, It is required that the vector control should be separated from flux component current and torque component current.<br/> In this paper, the vector control IS modeled by the estimation of the stator flux, Representing induction motor speed controller as a digital system with the use of the 32bit DSP, improves the motor control performance, The IGBT is used as the switching device and the validity of the proposed vector control is proved through voltage, current wave and the characteristics of the velocity response as the drive circuit being simplified
김세진(S. J. Kim),정영국(Y. G. Jung),임영철(Y. C. Lim),김광헌(K. H. Kim),차득근(D. G. Cha) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.1
This paper proposes a space vector modulation(SVPWM) of the quasi Z-source inverter, which is composed of the traditional voltage vector. Unlike the traditional control methods, the output voltage needs to be sensed in the proposed technique use both the output and capacitor voltages. To verify the validity, the PSIM(power electronics simulation tool) simulation studies are performed. The effectiveness of the proposed the system is verified in the steady state.
3상 H-bridge Multi-level inverter의 변형된 SVM에 관한 연구
엄준현(J. H. Eum),안현진(H. J. Ahn),정영국(Y. G. Jung),임영철(Y. C. Lim),김광헌(K. H. Kim),차득근(D. G. Cha) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.1
As H-bridge multilevel inverter is connected with series of single phase power cell, so it obtain high voltage using low voltage power semi-conductor and output voltage similar to sinusoidal wave. In this topology, the number of power cell increases in proportion to the output voltage level. This paper proposes a H-bridge Multilevel inverter and SVM(Space Vector Modulation) using slope of a linear function. The proposed method has some features improves processing of system, and decreases THD, and reduces to switching loss. To verify a validity of proposed method a PSIM simulation is used.