DCM Boost變換器隨機(jī)PWM非脆弱H∞控制
冉華軍，李翔，肖鵬
(三峽大學(xué) 電氣與新能源學(xué)院，湖北 宜昌 443002)
摘 要： 引入兩模態(tài)馬爾科夫鏈隨機(jī)PWM 策略到DCM Boost 變換器，推導(dǎo)建立了變換器的離散隨機(jī)跳變模型，并基于隨機(jī)跳變系統(tǒng)非脆弱H ∞控制理論為Boost 變換器設(shè)計(jì)了非脆弱H ∞控制器，利用Simulink 軟件平臺(tái)設(shè)計(jì)仿真電路進(jìn)行驗(yàn)證。仿真分析表明，設(shè)計(jì)的控制器改善了Boost 變換器的EMI品質(zhì)，對(duì)控制器參數(shù)攝動(dòng)表現(xiàn)出非脆弱性，使整個(gè)變換器系統(tǒng)具有較好的魯棒性。
關(guān)鍵詞： 隨機(jī)PWM；DCM Boost 變換器；非脆弱控制
中圖分類號(hào)：TN624 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1007-3175(2014)05-0005-05
Non-Fragile H∞ Control for Random Pulse Width Modulation of DCM Boost Converter
RAN Hua-jun, LI Xiang, XIAO Peng
（College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China）
Abstract: The two-state-Markov-chain random pulse width modulation (PWM) scheme was introduced into the DCM Boost converter. This paper derived the random discrete-time jumping model of the converter and designed the non-fragile H∞ controller based on non-fragile H∞ control theory of stochastic jumping system. The simulation was done to check the validity of non-fragile H∞ controller on the Simulink platform. The simulation analysis indicates that the designed controller has improved the EMI quality of Boost converter along with non-fragility to its parameters uncertainty, and with better robust for the whole converter system.
Key words: random pulse width modulation; DCM Boost converter; non-fragile control
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