Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2001.04a
- /
- Pages.240-243
- /
- 2001
Single-Phase Power Factor Correction(PFC) Converter Using the Variable gain
가변이득을 가지는 디지털제어 단상 역률보상회로
-
Baek, J.W.
(Power Electronics Group, KERI)
;
- Shin, B.C. (Power Electronics Group, KERI) ;
- Jeong, C.Y. (Power Electronics Group, KERI) ;
- Lee, Y.W. (Power Electronics Group, KERI) ;
-
Yoo, D.W.
(Power Electronics Group, KERI)
;
- Kim, H.G. (Electrical Eng., Kyungpook Univ.)
-
백주원
(한국전기연구원 전력전자연구그룹)
;
- 신병철 (한국전기연구원 전력전자연구그룹) ;
- 정창용 (한국전기연구원 전력전자연구그룹) ;
- 이영운 (한국전기연구원 전력전자연구그룹) ;
-
유동욱
(한국전기연구원 전력전자연구그룹)
;
- 김홍근 (경북대학교 전자전기공학부)
- Published : 2001.04.19
Abstract
This paper presents the digital controller using variable gain for single-phase power factor correction (PFC) converter. Generally, the gain of inner current control loop in single-stage PFC converter has a constant magnitude. This is why input current is distorted under low input voltage. In particular, a digital controller has more time delay than an analog controller which degrades characteristics of control loop. So, it causes the problem that the gain of current control loop isn't increased enough. In addition, the oscillation happens in the peak value of the input voltage open loop PFC system gain changes according to ac input voltage. These aspects make the design of the digital PFC controller difficult. In this paper, the improved digital control method for single-phase power factor converter is presented. The variable gain according to input voltage and input current help to improve current shape. The 800W converter is manufactured to verify the proposed control method.
Keywords