Adaptive Nonlinear Control of Multiphase Synchronous Buck Power Converters

The problem of controlling multiphase synchronous buck power converters is considered. The aim is to regulate the output voltage of the converter and to ensure an adequate current sharing between its different channels. The control law is designed from the large-signal bilinear model (of the whole multichannels converter) using the backstepping technique. The obtained regulator is shown to meet its objectives namely an asymptotic stability of the closed-loop system, a tight output voltage regulation, an adequate current sharing and a good estimation of load resistor.