Power electronics is concerned with the processing of electrical power using electronic devices, finding application in a wide range of settings from portable devices to industrial electronics.
Digital control in power electronics has seen considerable interest in recent years and has several advantages over the more traditional analogue control, including reduced sensitivity to parameter variations, lower power consumption and the possibility for more complicated control laws. These circuits may exhibit limit cycle oscillations owing to quantization in the feedback loop, which are generally considered to be undesirable as they degrade output voltage regulation.
We apply methods of nonlinear theory to predict the amplitude and frequency of these oscillations and to derive design rules which prevent these oscillations from occurring.
Our principal collaborator on this work is Prof Eduard Alarcon of Universitat Polytècnica de Catalunya (UPC), Barcelona.