Current Controller Design for High Switching Frequency Converters

Power electronics engineers typically address nonlinear behavior in switching power converters. It is often desirable to determine when the system operates periodically. The objective of this paper is to study how to set the parameters of the current controller for optimal dynamic behavior while ensuring a fixed frequency operation. The authors investigate a proposed continuous-time averaging model for a PWM current controller based on a modulated hysteresis controller. Stability analysis of the controlled system is performed using the eigenvalues of the system. Simulation and experimental results are presented to validate the proposed approach.