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中文摘要：
该文针对传统滑模控制开关变换器的滑模系数选取困难的问题,分析了控制受限的传统滑模控制Buck变换器的滑动模态区与滑模系数的关系.根据电感电流为零时系统在相平面的运动规律与滑模区的关系,给出了选取最优滑模系数的方法,以确保开关变换器系统在负载变动范围内快速进入滑动模态区,避免输出电压振荡现象.可根据负载变化范围直接采用公式计算最优滑模系数.仿真研究和实验结果验证了优化设计方法的正确性和有效性.
英文摘要：
In order to simplify the selection of sliding coefficient of conventional sliding mode control switch converter, the relations among the sliding region, the sliding coefficient and the circuit parameters of Buck converter are analyzed and discussed. when inductor current is zero, according to the relationship between the systems trajectory and sliding region, an optimal design method for the sliding coefficient was proposed to ensure that under load variation, the switch converter enter the sliding region with- out the output voltage oscillation phenomena. Based on load variation scope, the optimal sliding coefficient is calculated directly. The simulation and experimental results verify the validity and feasibility of the optimal design method proposed.
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