全橋推挽式雙向DC/DC變換器的建模與控制
張俊輝1,唐雄民1,張淼1,孫君光2
(1 廣東工業(yè)大學(xué) 自動(dòng)化學(xué)院,廣東 廣州 510006;2 廣州擎天實(shí)業(yè)有限公司,廣東 廣州 510300)
摘 要:全橋推挽式雙向DC/DC變換器大都采用狀態(tài)空間平均法來(lái)建模,建模過(guò)程復(fù)雜。以隔離型推挽式雙向DC/DC變換器為研究對(duì)象,采用PWM開(kāi)關(guān)模型法獲得了變換器的等效電路模型?;谠摰刃P?,構(gòu)建了變換器在不同工作模式下的閉環(huán)控制系統(tǒng),進(jìn)行了電壓控制環(huán)的設(shè)計(jì)和校正,實(shí)現(xiàn)了不同工作模式下的恒壓充放電控制策略。實(shí)驗(yàn)和仿真結(jié)果驗(yàn)證了結(jié)論的正確性。
關(guān)鍵詞:全橋推挽;PWM開(kāi)關(guān)模型;恒壓控制
中圖分類號(hào):TM464 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2017)11-0014-04
Modeling and Control of Full Bridge Push-Pull Bi-Directional DC/DC Converter
ZHANG Jun-hui1, TANG Xiong-min1, ZHANG Miao1, SUN Jun-guang2
(1 School of Automation, Guangdong University of Technology, Guangzhou 510006, China;
2 Guangzhou Kinte Industrial Co., Ltd, Guangzhou 510300, China)
Abstract: Full bridge push-pull bi-directional DC/DC converters are mostly modeled by state space averaging method with the complex modeling process. Taking the isolated form push-pull bi-directional DC/DC converter as the research object, this paper adopted the pulse-width modulation switch model method to obtain the equivalent circuit model of this converter. Based on this model, this paper constructed a closedloop control system of the converter under different working modes, carried out the design and verification of voltage control loop and realized the constant voltage charge-discharge control strategy. The experimental and simulation results verify the correctness of the conclusion.
Key words: full bridge push-pull; pulse-width modulation switch model; constant voltage control
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