Indirect Synchronization Phenomenon on Self-Oscillating Current Controllers

In this paper, a particular phenomenon called indirect synchronization is investigated on self-oscillating current controllers based on a hysteresis controller and a recent relay- feedback controller without hysteresis. The main effect of this indirect synchronization is a modification of regulation behavior when the system works in high frequency. This study is thus particularly useful for applications such as active filtering or high precision power supply, where the signals to target can be close to the fifth of the switching frequency. Simulation results highlight this indirect synchronization phenomenon and thus show relevance to take it into account for high accuracy applications.