Design and Simulation on Improved Repetitive Controller for Inverted Power Supply

Aimed at the inverted power supply control system, an improved repetitive control method has been proposed. It combines repetitive controller with proportion and integral controllers, which improves the inverted power supply’s output power performance when the load is nonlinear. Based on this control scheme, a detailed program parameters design for each part of the repetitive controller is proposed and the special Notch function is also introduced. The improved repetitive controller design method was verified by simulation and results showed that improved system has good dynamic and static characteristics, stable voltage accuracy is high; the content of output waveform harmonic dropped to 1.07%, the rate of convergence speed was greatly enhanced.