Actively clamped bidirectional flyback converter

Author

Chen, Gang ; Lee, Yim-Shu ; Hui, S.Y.R. ; Xu, Dehong ; Wang, Yousheng

Author_Institution

Dept. of Electron. & Inf. Eng., Hong Kong Polytech., Kowloon, Hong Kong

Volume

47

Issue

4

fYear

2000

fDate

8/1/2000 12:00:00 AM

Firstpage

770

Lastpage

779

Abstract

An actively clamped bidirectional flyback converter is proposed. The converter´s operation is examined in detail. All switches in the converter have zero-voltage-switching characteristics. A low-frequency behavior model and small-signal transfer functions are derived. It is found that the flow of current is directly under the control of the duty cycle, and that the transformer´s leakage inductance has a significant effect on the control characteristic of the converter. It is expected that such bidirectional converters will find wide applications in the interconnection of multiple sources of DC power to a common bus (e.g., in a DC uninterruptible power supply). Simulation and experiment results are also presented

Keywords

DC-DC power convertors; electric current control; inductance; switching circuits; transfer functions; transformers; DC uninterruptible power supply; actively clamped bidirectional flyback converter; bidirectional converters; current flow control; duty cycle; low-frequency behavior model; multiple DC power sources connection; small-signal transfer functions; transformer leakage inductance; zero-voltage-switching; Capacitors; Circuit topology; Clamps; Inductance; MOSFET circuits; Pulse width modulation; Stress; Switches; Switching converters; Uninterruptible power systems;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.857957

Filename

857957