A new high frequency current generation method for inductive power transfer applications

This paper proposes a new method to generate high frequency currents for inductive power transfer systems where AC-DC-AC or DC-AC converters are being used. There are a lot of circuit and controller design issues associated with these traditional converters. A DC link has to be used as a middle stage for high frequency current generation even when a low frequency AC source is available, which causes large system cost, size, as well as power losses and maintenance associated. Unlike matrix converters having complicated switching topologies and control, the new converter proposed in this paper is based on simply free oscillation and energy injection control. It can achieve DC to AC inversion, or direct AC to AC conversion without using any DC links, thus a low frequency utility power source at 50/60 Hz can be converted to a high frequency current source along a track loop directly