中圖分類號(hào)： TN86 文獻(xiàn)標(biāo)識(shí)碼： A DOI：10.16157/j.issn.0258-7998.200517 中文引用格式： 吳振葦，李雙剛，張麗，等. 基于彈載的高功率密度LLC變換器設(shè)計(jì)[J].電子技術(shù)應(yīng)用，2020，46(11)：109-113. 英文引用格式： Wu Zhenwei，Li Shuanggang，Zhang Li，et al. Design of LLC converter with high power density on the missile[J]. Application of Electronic Technique，2020，46(11)：109-113.
Design of LLC converter with high power density on the missile
Wu Zhenwei，Li Shuanggang，Zhang Li，He Jiaojiao
Shanghai Institute of Space Power-Sources，Shanghai 200245，China
Abstract： The traditional pulse width control technology makes the switching tube in the power converter work in a hard switching state, and generates power loss that leads to efficiency decrease. Choosing the appropriate soft switching technology can effectively reduce the switching loss. This article designs a power supply product for a missile XX-11，where the front stage uses PFC circuit to achieve power factor correction, and adopts LLC resonance technology to realize the soft switching work of power tube. The switching loss is reduced, and the working efficiency of the converter is improved. The article introduces the working principle of LLC resonant circuit, uses FHA method and analyzes the influence of resonance parameters on converter gain and output efficiency, and adopts magnetic integration method to improve power density. Based on the above analysis and design, a 630W product was produced, and its electrical performance was tested and verified.
Key words : soft switching；LLC resonant converter；first harmonic approximation method；magnetic integration；fixed frequency control
