A Comparative Study of Terminal and Conventional Sliding-Mode Startup Peak Current Controls for a Synchronous Buck Converter
A Comparative Study of Terminal and Conventional Sliding-Mode Startup Peak Current Controls for a Synchronous Buck Converter
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DOI：
10.1109/jestpe.2019.2960924
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发表时间：
2021-02
影响因子：
5.5
通讯作者：
V. Repecho;Núria Masclans;D. Biel
中科院分区：
文献类型：
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作者：
V. Repecho;Núria Masclans;D. Biel
基于小信号平均模型的线性控制技术的替代方案是滑模控制（SMC）。该方法利用开关功率变换器的瞬时模型设计鲁棒控制器。大信号建模不仅可以控制稳态附近的系统行为，还可以控制启动瞬态。本文提出了两个滑模控制器的设计，调节输出电压的同步降压转换器和限制启动峰值电流。终端SMC（TSMC）的设计和比较一阶SMC，这是所谓的传统SMC这里。研究表明，由于TSMC的有限时间收敛特性，TSMC比传统的TSMC具有更短的过渡时间。它还在线路和负载调节方面实现了更好的性能。组装了150 W/100 kHz的功率转换器原型，并将两个滑模控制器数字化并在微控制器中实现。数值模拟和实验结果验证了该方案的有效性。
An alternative to the linear control techniques, which are based on small-signal averaged models, is the sliding-mode control (SMC). That method uses the instantaneous models of the switched power converter to design robust controllers. The large-signal modeling allows controlling not only the system behavior around the steady state but also the startup transient. This article presents the design of two sliding-mode controllers that regulate the output voltage of a synchronous buck converter and limit the startup peak current. A terminal SMC (TSMC) is designed and compared with a first-order SMC, which is called here a conventional SMC. The study shows that the TSMC presents lower transient time to reach the final value than the conventional one because of its finite-time convergence property. It also achieves better performance in terms of line and load regulation. A power converter prototype of 150 W/100 kHz is assembled, and both sliding-mode controllers are digitalized and implemented in a microcontroller. Numerical simulations and experimental results validate the proposal.