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- Title
一种L-R 复合型桥式DC/DC 变换器.
- Authors
袁义生; 彭能; 刘伟
- Abstract
An L-R hybrid bridge DC/DC converter is proposed. Based on the traditional half-bridge LLC resonant converter,the proposed converter only adds a group of L-bridge arms and has HG(High voltage Gain) and LG(Low voltage Gain) modes. In HG mode,PWM(Pulse Width Modulation) is used and the linear energy storage of inductor is achieved through L-bridge arm,so as to obtain higher voltage gain and wider output voltage range compared with traditional LLC resonant converter. The voltage gain is less affected by excitation inductor,and the circuit works without feedback current. In LG mode,PFM(Pulse Frequency Modulation) is adopted,and the voltage gain characteristic is close to that of traditional LLC resonant con⁃ verter,while the feedback current and circulating current are smaller. The working principles of the two voltage gain modes of the proposed topology are analyzed in detail,and the gain formula is derived and compared with traditional topology. Finally,an experimental prototype with an input voltage of 220 V and an output voltage of 100~160 V is built,and the experimental results verify the correctness of theoretical analysis
- Subjects
PULSE frequency modulation; PULSE width modulation; HIGH voltages; ENERGY storage; VOLTAGE; ZERO voltage switching
- Publication
Electric Power Automation Equipment / Dianli Zidonghua Shebei, 2022, Vol 42, Issue 9, p154
- ISSN
1006-6047
- Publication type
Article
- DOI
10.16081/j.epae.202205026