DCM Boost變換器隨機PWM非脆弱H∞控制
冉華軍，李翔，肖鵬
(三峽大學 電氣與新能源學院，湖北 宜昌 443002)
摘 要： 引入兩模態馬爾科夫鏈隨機PWM 策略到DCM Boost 變換器，推導建立了變換器的離散隨機跳變模型，并基于隨機跳變系統非脆弱H ∞控制理論為Boost 變換器設計了非脆弱H ∞控制器，利用Simulink 軟件平臺設計仿真電路進行驗證。仿真分析表明，設計的控制器改善了Boost 變換器的EMI品質，對控制器參數攝動表現出非脆弱性，使整個變換器系統具有較好的魯棒性。
關鍵詞： 隨機PWM；DCM Boost 變換器；非脆弱控制
中圖分類號：TN624 文獻標識碼：A 文章編號：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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