中国电机工程学报Issue(15)：3895-3903,9.DOI:10.13334/j.0258-8013.pcsee.2015.15.019
一种Boost型宽电压范围输入LLC谐振变换器
A Boost-integrated LLC Resonant Converter for Wide Input Voltage Range
摘要
Abstract
The conventional full/half-bridge LLC resonant converter is not suitable for wide input voltage range and its input current is discontinuous. Therefore, a novel Boost-integrated LLC resonant converter is proposed in this paper. Not only is the gain range extended, but also the input current ripple is significantly minimized by integrating two interleaved Boost inductors. Thus, the proposed converter is a good candidate for renewable energy generation systems, such as photovoltaic, fuel cell and so on. Instead of conventional pulse frequency modulation (PFM), the fixed frequency pulse width modulation (PWM) control is adopted, facilitating the optimization of magnetic components and filter circuits. Besides, it turns out that the magnetizing inductance and the Boost inductors have little impact on the gain characteristics of the proposed converter with PWM control, which is favorable for the design of resonant parameters. The operation principle is introduced and then the gain characteristics of the proposed converter are investigated in depth with time-domain analysis. Afterwards, the zero voltage switching (ZVS) conditions for all power switches are analyzed in detail. Finally, the feasibility of the proposed topology and the correctness of theoretical analysis are verified by experimental results of a prototype converter with 120~240V input and 24V/25A output.关键词
LLC/交错并联Boost/定频控制/脉冲宽度调制/宽输入电压范围Key words
LLC/interleaved Boost/fixed frequency control/pulse width modulation (PWM)/wide input voltage range分类
信息技术与安全科学引用本文复制引用
孙孝峰,申彦峰,朱云娥,刘飞龙,吴俊娟..一种Boost型宽电压范围输入LLC谐振变换器[J].中国电机工程学报,2015,(15):3895-3903,9.基金项目
国家自然科学基金项目(51077112)；河北省自然科学基金项目(E2012203163)。Project Supported by National Natural Science Foundation of China (51077112) （51077112）
Project Supported by the Natural Science Foundation of Hebei Province (E2012203163) （E2012203163）
