A comparative study among PID structures applied on a Buck converter control

Abstract

In this work, a state-space model and control of a DC-DC Buck converter, considering a continuous operating, are presented. A PID controller is considered in the strategy, that considers a low pass filter in the derivative term. The proposed model is validated by comparing it with a switched model. The PID gains are obtained by the Ziegler-Nichols method. In order to improve the system’s performance considering an environment containing high-frequency noises, the modified PID controller is implemented with several configurations.

Keywords

• choppers
• step down converter
• pid controller
• ziegler-nichols method
• average model