Optimal Control with Complete Load-Decoupled Design for the Buck DC-DC Switching Converter

• 作者: Fei-Hu Hsieh Yau-Tarng Juang
• 来源期刊: 电源世界
• 学科: 工学
• 关键词: switching mode power supply optimal control pulse WIDTH modulation BUCK CONVERTER COMPLETE load-decoupled
• 年，卷（期）: 2002,（2）
• 页码范围: 7-11
• 页数: 5页
• 分类号: TM46

摘要

This paper describes a new controller design procedure and turning method for the buck PWM DCDCswitching converter taking into consideration the equivalent series resistance of components. First, the linearoptimal feedback is designed by the LQR approach. Then the designed control law is implemented by aphase-lag lead controller incorporated with a complete load-decoupled PD compensator. The phase-lag lead controlleris tuned to achieve the optimal design based on the output error voltage directly, instead of using an estimator.With the proposed PD compensator, the converter is robust with respect to the load changes and parameterperturbations. We also provide the conditions for the robust stability assurance of the closed-loop system.