电工技术学报2012，Vol.27Issue(6)：103-109,7.
变频微波炉电源用LLC谐振变换器
Study of LLC Resonant Converter for Variable-Frequence Microwave Oven Power Supply
摘要
Abstract
A high-frequency soft switch power supply prototype was developed, which was technically designed to provide power source for magnetron in variable-frequence microwave oven. A LLC resonant converter whose output end combined with a voltage doubling rectifying circuit was used as its main circuit topology. The main circuit＇ steady-state equivalent circuit model was established- based on first harmonic analysis method. By means of the model the circuit＇ DC gain, resonant current and zero-voltage-switching （ZVS） condition were theoretically analyzed, and the converter＇ key parameters such as turns ratio of high frequency transformer, quality factor, excitation inductance, resonant inductance, resonant capacitance were optimized. The simulation result and the experimental verification indicate that the established steady-state equivalent circuit model and its theoretical analysis are correct, and the resonant network parameters＇ theoretical analysis and its optimal design are correct. The results have practical significance for analyzing, studying, improving magnetron power supply and guiding its production.关键词
微波炉/磁控管/LLC谐振变换器/零电压开关/基波分析法Key words
Microwave oven/magnetron/LLC resonant converter/ZVS/FHA分类
信息技术与安全科学引用本文复制引用
王春芳,徐勤超..变频微波炉电源用LLC谐振变换器[J].电工技术学报,2012,27(6):103-109,7.基金项目
山东省科技发展计划资助项目 （）
