Design of Controllers for DC-DC Buck Converters

Abstract

The design of controllers for DC-DC buck converters using PID controller and fuzzy logic controller has been the subject of numerous research studies in recent years. The objective of these studies is to improve the performance of the buck converter in terms of output voltage regulation, transient response, and efficiency.

PID controller is a commonly used feedback control mechanism that uses proportional, integral and derivative terms to adjust the output of the system. The PID controller is widely used in DC-DC buck converters due to its simplicity and effectiveness. The proportional term of the PID controller adjusts the output based on the difference between the actual and desired output, the integra term is used to eliminate steady-state error, and the derivative term improves the transient response of the system.

On the other hand, the Fuzzy Logic Controller (FLC) is a more complex control mechanism that uses linguistic rules and fuzzy sets to adjust the output of the system. FLCs have been shown to be effective in DC-DC buck converters due to their ability to handle non-linearities and uncertainties in the system.

In this paper, we are simulating PID control and fuzzy logic control for both single stage and cascaded converter. The hardware implementation of the
former is done as well, and the results are compared based on rise time, settling time, peak overshoot and offset at steady state.