AN ACCURATE FREQUENCY TRACKING METHOD BASED ON SHORT CURRENT DETECTION
M. MadhuSudhan Reddy, P.InduSree
Electromagnetic coupling, frequency control, inductive power transfer (IPT).
Inductive Power Transfer (IPT) systems for transmitting tens to hundreds of watts have been reported for almost a decade. Most of the work has concentrated on the optimization of the link efficiency and have not taken into account the efficiency of the driver.A novel frequency tracking method based on short current detection is proposed for IPT applications. In addition, an instantaneous short current detection method utilizing cheap comparator is proposed. Furthermore, a fast and accurate tracking method is proposed to calculate the frequency mismatch and make a correction. The method can realize accurate frequency correction in several oscillation periods.