Backstepping design of current-mode controller for DC/DC boost power converters

In order to improve the control performance of DC/DC boost converters, a current-mode controller is designed using backstepping method. This controller consists of two parts, one is the proportional control of the inductor current to stabilize the controlled system, the other is the proportional and integral control of the capacitor voltage to track the desired output. This controller not only can overcome the difficulties resulted from the non-minimum phase property of DC/DC boost converters, but also can make the controlled system achieve excellent dynamic characteristics, and have strong robustness to the variations of system parameters, such as inductance, capacitance, input voltage, load resistance. Experimental results of a certain DC/DC boost converter indicate that the controller presented above is feasible.