Robust adaptive PI stabilization of a quadratic converter: Experimental results

In a previous paper the authors proved that a large class of switched power converters can be globally asymptotically stabilized with a simple linear proportional-integral (PI) controller around a suitably defined output. An explicit formula to construct the desired output, which is a linear combination of the converter states, is also given. Moreover, if the load resistance is unknown, an adaptation mechanism is added to the PI preserving the stability properties. In this paper this procedure is applied to a quadratic boost converter yielding a very simple control that is easy to tune. Experimental results assessing the performance of the proposed adaptive PI are shown.