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C-dump Converter에 의한 차량용 스위치드 릴럭턴스 전동기 구동 시스템의 고성능 제어
김도군(D.K. Kim),윤용호(Y.H. Yoon),이태원(T.W. Lee),원충연(C.Y. Won),김영렬(Y.R. Kim) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
Recently, SRMs are used in automobiles for power assistant steering, accessory motion control and traction drives. Especially in the motion control and traction drives, safety and efficiency are of paramount important. The paper describes the essential elements, faced in designing and constructing drive circuits for a switched reluctance motor for automobiles<br/> These converters will be referred to as energy efficient C-dump converter and modified C-dump converter. Energy efficient C-dump converter topology eliminate all the disadvantages of the C -dump converter without sacrificing its attractive features, and also provide some additional advantages that have lower number of power devices, full regenerative capability, free-wheeling in chopping or PWM mode, simple control strategy, and faster demagnetization during commutation. The experiments are performed to verify the capability of proposed control method on 6/4 salient type SRM.<br/>
SRM 구동을 위한 Energy Efficient C-Dump 컨버터에 관한 연구
최준혁(J.H. Choi),윤용호(Y.H. Yoon),송병섭(B.S. Song),원충연(C.Y. Won),김규식(G.S. Kim),최세완(S.W. Choi) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.-
This paper compared a Modified C-dump converter and energy efficient converter topologies, derived from the conventional C-dump converter, for switched reluctance motor (SRM) drives The proposed topologies overcome the limitations of the conventional C-dump converter, and could reduce the whole cost of the SRM drive. Also, the above converters have simple control requirements, and allow the motor phase current to free wheel during chopping mode. Specially, the voltage ratings of the dump capacitor and some of the switching devices in the proposed an Energy efficient C-dump converter is reduced to the supply voltage (V-dc) level compared to twice the supply voltage (2V-dc) in the conventional C-dump converter. Simulation and experimental results of the proposed converters are presented and verified.<br/> <br/>
Radiator cooling fan용 스위치드 릴럭턴스 전동기 및 토폴로지에 관한연구
정동효(D.H. Jung),유용호(Y.H. Yoon),한대희(D.H. Han),이태원(T.W. Lee),원충연(C.Y. Won) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
In automobile, the introduction of electronically commutated motors has been accompanied by a proliferation of electronic devices. with this proliferation of electronic devices, an emphasis has been placed on EMC issues. This paper is proposed to use SRM as a radiator cooling fan in automotive applications To drive SRM, Energy efficient C-dump converter is applied It is verified more efficient than other converters through simulation and experiments And also SRM is valid automotive applications that have strict EMC standards. It is compared SRM with BLDC and DC motor by experiments.<br/>
z- 소스 인버터와 울트라커패시터를 이용한 연료 전지 시스템
김윤호(Y. H. Kim),이욱영(W. Y Lee),서강문(K. M. Seo),원충연(C. Y. Won) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
본 논문에서는 연료 전지의 전압 강하 보상을 위해 Z-소스 인버터와 울트라커패시터를 포함하는 연료 전지 시스템을 제안하였다. Z-소스 인버터의 구조는 매우 간단하다. 이는 DC/DC 컨버터의 사용 없이 단순히 스위칭 패턴만을 제어하여 전압을 승압 할 수 있는 특징을 갖는다. 연료 전지 시스템은 연료 전지의 전압 변동시, 또는 부하 변동시 외부적인 영향에 의해서 과도 상태 전압 왜란이 발생할 수 있다. 이를 보상하기 위한 Z-소스 인버터의 다양한 타폴로지가 제안된다.
CO₂용접기의 대전류영역에서의 단락이행 유도에 의한 용접성능개선에 관한 연구
채영민(Y.M Chae),고재석(J.S Gho),구자열(J.Y Goo),최규하(G.H Choe),목형수(H S. Mok),김규식(K S. Kim),원충연(C.Y Won) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
The metal transfer of CO₂ arc welding machine can be devided into short-circuit(low current) and globular(large current) metal transfer. Especially in large current region, the main problem of CO₂ arc welding machine is much spatter generation which is caused by mainly instant short-circuit metal transfer. So in this paper descrives new current control method in large current region, which can improve welding performance and lessen spatter generation And as a result of experiment, the effect of proposed control method is demonstrated.<br/> <br/>
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.
직접토크 제어방식을 이용한 유도전동기 구동에 관한 연구
안용상(Y. S. Ahn),김연충(Y. C. Kim),이정호(J. H. Lee),원충연(C. Y. Won),송호범(H. B. Song) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
Direct Torque Control method for an Induction Motor is presented which is quite different from field-oriented control It carries out a precise and quick control of the stator flux and electromagnetic torque of an 1M without calling for coordinate transformation, speed measurement, and stator current control. In principle, moreover, DTC operation requires only the knowledge of the stator resistance.