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임정규(Jeong-Gyu Lim),서은경(Eun-Kyung Seo),정세교(Se-Kyo Chung),이현우(Hyun-Woo Lee) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
Of all the proposed resonant techniques, the well-known phase-shifted full bridge converter remains one of the most attractive because it offers an easy way of achieving ZVS with a minimum of extra components added, which is essential for the high power applications. This paper describes the design of a digital controller for a Phase Shifted Full-bridge PWM Converter. The small-signal model is derived incorporating the effects of phase-shift control and the utilization of the transformer leakage inductance and power FET junction capacitances to achieve the zero-voltage resonant switching. Based on the derived small-signal model, the digital controller is designed in the discrete domain. The performance of designed controller is verified through the simulation.
위상천이 풀-브릿지 PWM 컨버터의 이산 시간 모델링 및 제어기 설계
임정규(Jeong-Gyu Lim),임수현(Soo-Hyun Lim),정세교(Se-Kyo Chung) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
A phase shifted full-bridge PWM converter (PSFBC) has been used as the most popular topology for many applications. But, for the reasons of the cost and performance, the control circuits for the PSFBC have generally been implemented using analog circuits. The studies on the digital control of the PSFBC were recently presented. However, they considered only the digital implementation of the analog controller. This paper presents the modeling and design of the digital controller for the PSFBC in the discrete time domain. The discretized PSFBC model is first derived considering the sampling effect. Based on this model, the digital controller is directly designed in discrete time domain. The simulation and experimental results are provided to verify the proposed modeling and controller design.
TMS320F2812 DSP와 스마트 파워모듈을 사용한 유도전동기 소형 벡터제어 시스템의 구현
임정규(Jeong-Gyu Lim),김석환(Seok-Hwan Kim),정세교(Se-Kyo Chung) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
This paper presents an implementation of compact vector control system for induction motor using a digital signal processor (DSP) and a smart power module (SPM). The DSP TMS320F2812 has most necessary functions for ac motor control in a single chip and SPM provides a compact power stage. The indirect vector control algorithm is implemented in the drive system using these devices. The developed system is applied by 0.8㎾ induction servo motor and the all functions are verified through the experiments.
단일 연료전지 셀을 위한 저입력 전압 승압 컨버터의 설계
임정규(Jeong-Gyu Lim),박진주(Jin-ju Park),정세교(Se-Kyo Chung) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.7
This paper presents the design of a low-input-voltage step-up converter. Such circuits can be useful for single fuel cell to generate less than 0.7V. Important issues to design it are physical volume, efficiency and start-up method. In this paper, we propose a step-up converter with a simple start-up circuit. The operation of proposed circuit is presented and the experimental results are provided to verify the feasibility of the proposed technique.
마이크로터빈/영구자석 동기발전기(MTG/PMSG)의 최대출력 벡터제어
임정규(Jeong-Gyu Lim),김무현(Mu-Hyun Kim),정세교(Se-Kyo Chung),송유진(Yu-Jin Song) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.1
This paper presents a vector control method to obtain the maximum output power Microturbine/permanent magnet synchronous generator(MTG/PMSG). The torque characteristics of PMSG are analyzed and equations related with a maximum torpue per ampere is derived. Finally, the conditions of a ratio of a maximum torque per ampere and a maximum output power are proposed.
Intelligent Power Module의 플로팅 게이트 전원 공급을 위한 전하 펌프 회로의 설계
임정규(Jeong-Gyu Lim),김석환(Seok-Hwan Kim),서은경(Eun-kyung Seo),정세교(Se-Kyo Chung) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
A bootstrap circuit for floating power supply has the advantage of being simple and inexpensive. However, the duty cycle and on-time are limited by the requirement to refresh the charge in the bootstrap capacitor. Hence, this paper deals with a design of charge pump circuit for a floating gate power supply of an IPM. The operation of the proposed circuit applied by three-phase inverter system for driving induction motor are verified through the experiments.
임정규(Jeong-Gyu Lim),임수현(Soo-Hyun Lim),신휘범(Hwi-Beom Shin),정세교(Se-Kyo Chung),이현우(Hyun-Woo Lee) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
This paper presents the design and implementation of a digital control system for a Phase Shifted Full-Bridge PWM Converter. The digital control of Phase Shifted Full-Bridge PWM Converter provides many advantageous of easily generating various phase-shift timing and implementing a complex voltage and current control algorithm. Based on the derived small-signal model, the digital controller is designed in the discrete domain. The designed digital controller implemented using the DSP TMS320F2812. The performance is proved through the experimental results.
DSP를 이용한 Synchronous Buck Converter의 병렬 제어
김정훈(Jeong-Hoon Kim),임정규(Jeong-Gyu Lim),신휘범(Hwi-Beom Shin),정세교(Se-Kyo Chung),이현우(Hyun-Woo Lee) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
This paper represents a digital parallel control of a synchronous buck converter using a digital signal processor (DSP). The digital PWM and load sharing controller is implemented in the DSP TMS320F2812 and the experimental results are provided to show the feasibility of the digital synchronous buck regulator.
다상 동기 벅 컨버터의 Current Sensing 방법의 비교 연구
김정훈(Jeong-Hoon Kim),조경식(Kyung-Sig Cho),임정규(Jeong-Gyu Lim),정세교(Se-Kyo Chung) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
For the design of the voltage regulation module(VRM) having a high performance, current sensing is one of the most important functions. In this paper, three different methods for sensing the current in the multi-phase synchronous buck converter are analyzed considering the efficiency, accuracy and cost. The experiments are performed for the three current sensing methods to verify the theoretic analysis.