NDLI: Analysis and design of high frequency asymmetrical half bridge flyback converter

Content Provider	IEEE Xplore Digital Library
Author	Han Li Wenjun Zhou Shiping Zhou Xiao Yi
Copyright Year	2008
Description	Author affiliation: Sch. of Electr. Eng., Wuhan Univ., Wuhan (Han Li; Wenjun Zhou; Xiao Yi) \|\| Hubei Electr. Power Co., Wuhan (Shiping Zhou)
Abstract	The asymmetrical half bridge flyback converter is gaining popularity because it can achieve ZVS operation. However, the relationship between voltage transfer ratio and duty cycle is nonlinear in the condition of high switching frequency and small blocking capacitor. It is improper to use the linear model to guide the design of asymmetrical half bridge flyback converter. This paper deduces a steady-state voltage transfer function of the converter at high frequency, and the effect of load is also taken into consideration. According to the steady-state voltage transfer function, the characteristics of voltage transfer ratio and maximum duty cycle can be determined. Finally, a 19 V/6 A, 250 kHz prototype is designed and built to verify the analytical results. The experimental results indicate that, compared to the linear model, the asymmetrical half bridge flyback converter designed according to the voltage transfer function can be controlled more accurately and has significant merits at high frequency.
Starting Page	1902
Ending Page	1904
File Size	439883
Page Count	3
File Format	PDF
ISBN	9781424438266
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-17
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	IEEE Consumer Electronics Society(CES)
Subject Keyword	Frequency conversion Chromium Bridge circuits Video recording Capacitors Steady-state Transfer functions Zero voltage switching Switching frequency Resonance
Content Type	Text
Resource Type	Article

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