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首页> 外文期刊>Power Electronics, IET >Discrete-time sliding-mode-based digital pulse width modulation control of a boost converter
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Discrete-time sliding-mode-based digital pulse width modulation control of a boost converter

机译：基于离散滑模的升压转换器数字脉宽调制控制

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摘要

In this study, a non-linear digital control of a boost converter based on a sliding discrete-time approximation is presented. The control strategy follows a classical cascade regulation scheme with the inner loop consisting in a non-linear current-control based on discrete-time sliding mode, and the outer one being composed of a simple discrete-time proportional-integral (PI) controller for output voltage regulation. An analytical expression of the current control law is developed using a simplified discrete-time small-signal model of the boost converter. The discrete-time PI compensator is designed from a discrete-time small-signal parametric model of the inner loop obtained by linearisation around the desired equilibrium point. The proposed method is initially based on the notion of discrete-time sliding motion to eventually derive a pulse width modulation (PWM) controlled system. Thus, the reported approach can be categorised not only as a direct digital design technique for voltage regulation but also as a competitive method to design sliding-mode-based PWM controllers. Simulated and experimental results in a boost converter operating in continuous conduction mode verify the theoretical predictions.
机译：在这项研究中，提出了一种基于滑动离散时间近似的升压转换器的非线性数字控制。该控制策略遵循经典的级联调节方案，其内部回路包括基于离散时间滑模的非线性电流控制，外部回路由简单的离散时间比例积分（PI）控制器组成，用于输出电压调节。使用升压转换器的简化离散时间小信号模型开发了当前控制律的解析表达式。离散时间PI补偿器由内部环路的离散时间小信号参数模型设计而成，该模型通过在所需平衡点周围进行线性化获得。所提出的方法最初基于离散时间滑动运动的概念，以最终得出脉冲宽度调制（PWM）控制的系统。因此，所报告的方法不仅可以归类为用于电压调节的直接数字设计技术，而且可以归类为设计基于滑模的PWM控制器的竞争方法。在连续传导模式下运行的升压转换器中的仿真和实验结果验证了理论预测。

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