DCM Boost变换器随机PWM非脆弱H∞控制
冉华军，李翔，肖鹏
(三峡大学 电气与新能源学院，湖北 宜昌 443002)
摘 要： 引入两模态马尔科夫链随机PWM 策略到DCM Boost 变换器，推导建立了变换器的离散随机跳变模型，并基于随机跳变系统非脆弱H ∞控制理论为Boost 变换器设计了非脆弱H ∞控制器，利用Simulink 软件平台设计仿真电路进行验证。仿真分析表明，设计的控制器改善了Boost 变换器的EMI品质，对控制器参数摄动表现出非脆弱性，使整个变换器系统具有较好的鲁棒性。
关键词： 随机PWM；DCM Boost 变换器；非脆弱控制
中图分类号：TN624 文献标识码：A 文章编号：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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