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PWM 스위칭 기법에 의한 유도전동기 구동시스템의 전도노이즈 저감
김홍주(H.J. Kim),이원철(W.C. Lee),김이훈(L.H. Kim),원충연(C.Y. Won),최세완(S.Y. Choi),김규식(G.S. Kim),정동효(D.H. Jeong) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
Conventional SVPWM method has null switching vectors. Null switching vectors cause high common-mode voltage in induction motor drive system. The newly developed common mode voltage reduction PWM technique don't use zero switching state for inverter control. It is realized by changing software without additional hardware. Simulation and experimental results show that proposed method are reduced common mode voltage more than conventional method.
에어컨용 PFC Boost Converter의 전도 노이즈 저감
이성희(S.H. Lee),김이훈(L.H. Kim),김영규(Y.G. Kim),원충연(C.Y. Won),김태덕(T.D. Kim),김대경(D.K. Kim) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
Switching PFC converters are widely used not only to comply the power quality specification but also for maximum efficiency. However switching PFC converters generate serious electromagnetic interference(EMI).<br/> In this paper to solve this problem, we applied the APW(Anti Phase Winding) and RPWM(Ran -dom PWM) technique to PFC boost converter and obtained satisfactory results.<br/> Simulation and experimental results show the improved harmonic and reduced EMI effect in air-conditioner system.<br/>
효율개선을 위한 Push-Pull Converter의 동기정류에 관한 연구
김동중(D.J.Kim),김영규(Y.G.Kim),김이훈(L.H.Kim),원충연(C.Y.Won),김규식(G.S.Kim),최세완(S.W.Choi) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
Single winding self driven synchronous rectification(SWSDSR) scheme is based on an addi-winding in the power transformer (auxiliary winding). It allows for maintaining the synchronous rectifiers on even when the voltage in the transformer is zero, which is impossible to do in traditional self-driven approaches. Its technique is verified to Improve the efficiency by experiment In This paper, there are compared self driven synchronous rectification(SDSR) with SWSDSR about the efficiency
단상 AC/DC 승압형 컨버터를 이용한 피복 아크 용접기역률 개선에 관한 연구
유영진(Y. J. Yu),김이훈(L. H. Kim),김준호(J. H. Kim),원충연(C. Y. Won),김영렬(Y. R. Kim),이상용(S. Y. Lee) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
In this paper, we proposed AC/DC boost converter to improve input current harmonic reduction in SMAW(shielded metal-arc welding). The proposed harmonic reduction with the boost converter design and the UC2854 integrated circuit which controls the converter.<br/> The topology of welding power supply is made of a pair of boost converter and welder half-bridge IGBT inverter. The voltage arc is modeled by a variable resistance in series with a voltage source. The results has been confirmed by PSIM simulation tool.<br/> The simulation results show that input ac current is nearly sinusoidal with low harmonic contents and sinusoidal input current waveform at high power factor.
엘리베이터구동용 영구자석형 동기전동기의 속도제어에 관한 연구
유재성(J.S.Yu),김이훈(L.H.Kim),최기준(G.J.Choi),윤관철(K.C.Yoon),정무택(M.T.Jung),김연충(Y.C.Kim),이상석(S.S.Lee),원충연(C.Y.Won) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
This paper presents the speed control of the surface-mounted permanent-magnet synchronous motors (SMPMSM) for the elevator drive The elevator motor needs to be a compact and slim type Essentially, the proposed scheme uses a vector control algorithm for a speed and torque control This system is implemented using a<br/> high speed 32-bit DSP (TMS320C31-50), a<br/> high-Integrated logic device FPGA (EPF1OK10-TI144-3)to design compactly and Inexpensively<br/> The proposed scheme is verified through digital simulation and experiments for a three-phase 133kW SMPMSM as a MRL(MachineRoomLess) elevator motor in the laboratory finally, experiment of the test tower was performed with a 48kW PWM converter-Inverter system for a high-speed elevator
유도전동기 벡터제어 시스템의 EMI저감을 위한 새로운 PWM기법
배우리(W.R Bae),이원철(W.C Lee),유재성(J.S Yu),김이훈(L.H Kim),함년근(N.K Hahm),원충연(C.Y Won) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
This paper describes the application of newly developed conducted EMI reduction technique of SVPWM in induction motor drive. The newly developed common mode voltage reduction SVPWM technique doesn't any zero-voltage vector states for inverter control. Hence it can restrict the common mode voltage better than conventional PWM technique. The proposed technique is verified through simulation and experimental results. And by applying vector-controled system, the proposed technique have superior ability of reducing EMI and equal control performance comparing conventional SVPWM technique
영구자석형 동기전동기의 저속도 제어 특성 개선에 관한 연구
전범수(B.S.Jun),유재성(J.S.Yu),김이훈(L.H.Kim),원충연(C.Y.Won),김규식(G.S.Kim),최세완(S.W.Choi) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
This paper presents the method of speed measurement for permanent magnet synchronous motor(PMSM) with the full-order observer using reduced-order state equation This is able to improve the operating performance at low speed<br/> Therefore, by the proposed technique, a low resolution encoder can be used. Because It make the system Improve the performance of speed response. The proposed method is verified to simulation and experiments
서민성(M.S.Seo),류동균(D.K.Ryu),김이훈(L.H.Kim),김준호(J.H.Kim),원충연(C.Y.Won),배기훈(K.H.Bae) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
In this paper digitally based excitation systems for the synchronous brushless generators are presented. System configuration, control functions with their structure functions are also shown<br/> The control system has two feedback loops main one based on a generator's voltage with digital controller and inner one based on excitation voltage of the exciter with analog controller<br/> Usually the generator regulation of voltage is made with transducers for the voltage measurement. This paper shows technique of measuring the voltage without harmonics affect, using Park's equation transformation.