Nonlinear current control method for boost converter

作者：Shuai, Ding-Xin^*; Xie, Yun-Xiang; Wang, Xiao-Gang; Zhou, Fu-Xing

来源：Proceedings of the CSEE, 2009, 29(15): 15-21.

• BOOST converter
• Controlled system
• Current control modes
• Dynamic characteristics
• Input output linearization
• Nonlinear
• Nonlinear current controls
• Steady state errors

Based on input-output linearization theory, a novel nonlinear current control method for Boost converter and its modification was proposed. Through stability analyzing the internal dynamics of the system, it was pointed out that the internal dynamics of the system is unstable under voltage control mode and it is stable under current control mode. It is feasible to control the output voltage indirect through the regulation of the inductor current. Then, a novel current control law was derived. Experimental results show that under the proposed current control law the inductor current can follow the setting value precisely, while there exists steady-state error of the output voltage. Further, under consideration of the adjunct parameters of the practical circuit, a modified control scheme was proposed. The validity of the modified current control law was verified by experimental results. The controlled system has excellent steady-state and dynamic characteristics.

• 出版日期2009-5-25
• 单位华南理工大学