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首页> 外文期刊>IEEE Transactions on Energy Conversion >Simplified Nonlinear Voltage-Mode Control of PWM DC-DC Buck Converter
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Simplified Nonlinear Voltage-Mode Control of PWM DC-DC Buck Converter

机译：PWM DC-DC降压转换器的简化非线性电压模式控制

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摘要

This paper introduces a new nonlinear voltage-mode controller for a PWM dc-dc buck converter operating in continuous conduction mode. The sliding-mode control technique is used to derive a simplified equivalent control law based on the averaged dc-dc buck converter dynamics. As opposed to the reported design approaches, the proposed control scheme only requires the output voltage in the feedback loop without the need to the capacitor current. Thus, the analogue implementation cost is reduced and the drawback of adding a capacitor current sensor to the power converter is eliminated. The control equation is realized in a simple analogue circuit using few op-amps and resistors, which is suitable for industrial applications. The system modeling and control design procedure along with the derivation of the existence and stability conditions are presented. The control system performance is analyzed using MATLAB and SaberRD simulations. Furthermore, a simple analogue prototype of the simplified nonlinear voltage-mode controlled dc-dc buck converter is developed on a PCB. The simulation and experimental results show that the controller maintains a constant switching frequency, exhibits fast transient response, and provides good tracking performance under large disturbances.
机译：本文介绍了一种以连续导通模式运行的PWM DC-DC降压转换器的新型非线性电压模式控制器。滑动模式控制技术用于基于平均DC-DC降压转换器动力学推导出简化的等效控制定律。与报告的设计方法相反，所提出的控制方案只需要反馈回路中的输出电压而不需要电容器电流。因此，减少了模拟实现成本并且消除了向功率转换器添加电容器电流传感器的缺点。使用少量OP-AMPS和电阻器，控制方程在简单的模拟电路中实现，该电阻适用于工业应用。呈现了系统建模和控制设计过程以及存在的存在和稳定性条件的衍生。使用MATLAB和SABERRD仿真分析控制系统性能。此外，在PCB上显影了简化的非线性电压模式控制DC-DC降压转换器的简单模拟原型。仿真和实验结果表明，控制器保持恒定的开关频率，呈现快速瞬态响应，并在大扰动下提供良好的跟踪性能。

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