中圖分類號(hào)： TN86 文獻(xiàn)標(biāo)識(shí)碼： A DOI：10.16157/j.issn.0258-7998.211628 中文引用格式： 饒剛，嚴(yán)帥,，金彬,，等. 100 W半橋LLC諧振變換器快速響應(yīng)的控制策略設(shè)計(jì)[J].電子技術(shù)應(yīng)用，2022,，48(2)：101-106,，110. 英文引用格式： Rao Gang，Yan Shuai,，Jin Bin,，et al. Control strategy design of 100 W fast response half bridge LLC resonant converter[J]. Application of Electronic Technique，2022,，48(2)：101-106,，110.
Control strategy design of 100 W fast response half bridge LLC resonant converter
Rao Gang，Yan Shuai,，Jin Bin,，Wang Wenjun
Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering， Wuhan University of Science and Technology,，Wuhan 430081,，China
Abstract： For the dynamic characteristics of communication power supply when there is an inflow of big data traffic, a design of half-bridge LLC resonant converter based on variable universe fuzzy-PID control is proposed, which can realize the fast response control. Based on the traditional-PID control, it′s also adopted fuzzy mathematics and fast scalar multiplication algorithms that can help to improve the fast convergence characteristic of the system. Later, MATLAB/simulink software was used to simulate this strategy, compared with the traditional PID control scheme. Finally, an experimental prototype was designed for experimental verification. The experimental results show that the LLC resonant converter under variable universe fuzzy PID control has faster response speed and better dynamic characteristics.
Key words : variable universe fuzzy-PID control；half-bridge LLC resonant converter,；communication power supply,；dynamic characteristics
由于諧振電源器件參數(shù)固化,，其動(dòng)態(tài)特性的提升多從控制回路著手,。文獻(xiàn)[4]通過對(duì)諧振電容兩端電壓進(jìn)行分壓串取實(shí)現(xiàn)電流信息的采樣工作,，該種方案替代了電流互感器，但實(shí)現(xiàn)過程較為復(fù)雜,，對(duì)電壓電流的采樣精度有較高要求,。文獻(xiàn)[5]提出一種將變頻控制和移相控制相結(jié)合的控制方法，基于該種方法能實(shí)現(xiàn)變換器的寬電壓增益及全負(fù)載范圍的軟開關(guān),，但控制環(huán)節(jié)較為復(fù)雜,，且PI環(huán)節(jié)的使用依舊存在控制回路對(duì)非線性負(fù)載跟隨性差的問題。文獻(xiàn)[6]依據(jù)軌跡控制需實(shí)時(shí)檢測(cè)輸出狀態(tài)的特性提出一種簡(jiǎn)化的軌跡控制策略,，該策略在一定程度上消除了PID控制積分環(huán)節(jié)過大帶來的輸出過沖影響,，但在實(shí)際應(yīng)用中受器件寄生參數(shù)及頻率的影響較大，而文中對(duì)此并沒有進(jìn)行深入探討,。此外,，平均電流控制[7]、電荷控制[8-9],、脈沖寬度調(diào)制(Pulse Width Modulation,，PWM)與脈沖頻率調(diào)制(Pulse Frequency Modulation，PFM)混合控制[10]等控制方式在參數(shù)匹配的情況下對(duì)LLC諧振變換器的動(dòng)態(tài)特性都進(jìn)行了提升,，但在系統(tǒng)參數(shù)發(fā)生改變時(shí),，上述控制方式將難以獲得理想的控制效果。
