Control algorithm improvements for an electric vehicle DC fast charger

Digital control creates the opportunity to conveniently and economically investigate and implement several different control algorithms for DC fast charging of compatible plug-in hybrid and full electric vehicles. These algorithms can extend the operating range, and possibly the efficiency of the charging system. This report describes one such algorithm, cycle skipping, by which the operation of a resonant converter is periodically idle. This technique has the potential of reducing magnetic core losses due to reduction of frequency and reduction of switching losses due to reduction of tail-current induced losses. This report consists of a DC and AC analysis of the operation of the power converter using simulations. After a brief of exploration of potential control techniques, both of these analyses are performed using the cycle skipping control technique.