Title :
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
fDate :
8/1/2000 12:00:00 AM
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;
Journal_Title :
Industrial Electronics, IEEE Transactions on
