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류홍제(Hong-Je Ryoo),임근희(Geun-Hie Rim),김종수(Jong-Soo Kim),안석호(Suk-Ho Ahn),장성록(Sung-Roc Jang) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
본 논문에서는 최근 친환경 자동차 개발에 따라 관심이 증대되고 있는 전기자동차용 급속충전 시스템 구축방안에 대하여 살펴 본다. 대용량 2차 전지를 탑재하고 있는 전기자동차용 급속충전시스템의 개발동향과 국내 구축시의 고려사항을 살펴보고 전기자동차의 급속충전시스템 구축방안에 대한 기본 설계 안을 제시한다. 제시된 급속 충전시스템은 현재 60㎾급 시작품 제작이 완료되어 실증 실험중이며, 보완 및 신뢰성 확보 후 상용화 시스템 개발품으로 발전시킬 예정이다.
류홍제(Hong-Je Ryoo),김종수(Jong-Su Kim),김수진(Su-jin Kim),D. Sytykh 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
In this paper, the design of power supply for high power magnetron system is stuied. For magnetron drive, three kinds of power supply is required for main high voltage, magnet and heating filament. Detail design was accomplished with basic simulation and real system is developing based on basic design.
류홍제(Hong-Je Ryoo),김수진(Su-jin Kim),이현정(Hyun-jeong Lee),김종수(Jong-Su Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
In this paper, the design of power supply for high power magnetron system is stuied. For magnetron drive, three kinds of power supply is required for main high voltage, magnet and heating filament. Detail design was accomplished with basic simulation and real system is developing based on basic design.
퍼지PI 제어기를 사용한 스위치드 리럭턴스 전동기의 속도제어
류홍제,김학성,김세찬,강욱,원충연,Ryoo, Hong-Je,Kim, Hack-Seong,Kim, Sei-Chan,Kang, Wook,Won, Chung-Yuen 대한전자공학회 1996 전자공학회논문지-B Vol.b33 No.2
This paper deals with the speed control of the switched reluctnace motor using fuzzy PI controller. A fuzzy logic control provides a good approach to nonlinear system because it does not require a detailed mathematical model to formulate the algorithm. The fuzzy PI controller is implemented by MCS80C196KB, a 16 bit one-chip microcontroller, and an EPROM is used for the commutation logic of the SRM. The simulation and experimental results show that the performance of the fuzzy PI controller is superior to that of the conventional PI controller in terms of response time, settling time and overshoot. In particular, the robustness of the system is largely improved.
고속전철 전기시스템의 효율적인 개발을 위한 통합시스템 시험
류홍제(Hong-Je Ryoo),이주훈(Joo-Hoon Lee),조창희(Chang-Hee Cho),김용주(Yong-Ju Kim) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
In this paper, an effective way to develop electrical system for Korean High-Speed Train(KHST) was introduced. High speed train is complicated electrical system that consists of many kinds of control devices, power supplies and communication systems. Due to reason of cost, safety and time for development, it is not so easy to test system performance after construct the high speed train in the test track. For the effective test and verification of system performance, from each electric system test to integration test for all interconnected electrical system are performed to reduce time and cost for development of high speed train.
柳泓齊(Hong-Je Ryoo),金鍾洙(Jong-Soo Kim),林根熙(Geun-Hie Rim),G. I. Goussev,D. Sytykh 대한전기학회 2007 전기학회논문지 Vol.56 No.1
In this paper, a novel new pulse power generator based on IGBT stacks is proposed for pulse power application. Because it can generate up to 60㎸ pulse output voltage without any step- up transformer or pulse forming network, it has advantages of fast rising time, easiness of pulse width variation and rectangular pulse shape. Proposed scheme consists of series connected 9 power stages to generate maximum 60㎸ output pulse and one series resonant power inverter to charge DC capacitor voltage. Each power stages are configured as 8 series connected power cells and each power cell generates up to 850VDC pulse. Finally pulse output voltage is applied using total 72 series connected IGBTs. To reduce component for gate power supply, a simple and robust gate drive circuit is proposed. For gating signal synchronization, full bridge inverter and pulse transformer generates on-off signals of IGBT gating with gate power simultaneously and it has very good characteristics of short circuit protection.