中图分类号：TN86 文献标志码：A DOI: 10.16157/j.issn.0258-7998.245644
中文引用格式： 刘澳慧，王少宁，徐霆豪. 基于双环控制的高频LLC谐振变换器的空间电源设计[J]. 电子技术应用，2025，51(2)：97-101.
英文引用格式： Liu Aohui，Wang Shaoning，Xu Tinghao. Design of high frequency LLC resonant circuit based on double loop control[J]. Application of Electronic Technique，2025，51(2)：97-101.

Design of high frequency LLC resonant circuit based on double loop control

Abstract： This paper investigated the use of a high frequency LLC resonant circuit with double loop control in an electric propulsion system's secondary power source. A detailed presentation and discussion of the LLC resonant converter topology design process were given. In order to minimize switching loss when operating at high frequencies, the power switching tube's primary side used soft switching technology and its secondary side used synchronous rectification technology. This paper presented a thorough analysis of the LLC resonant converter structure, utilizing Pulse Frequency Modulation (PFM) in place of standard Pulse Width Modulation (PWM). Simultaneously, a double loop voltage-current control technique was developed that could function at constant voltage throughout the load and voltage change range. Ultimately, the simulation results demonstrate that the controller performs well and the suggested circuit converter can achieve a constant voltage across a wide range of input voltages and load steps.

Key words : LLC resonant transform；synchronous rectification；small signal analysis；two-loop control