A contactless electrical energy transmission system includes a transformer having a primary winding that is coupled to a power source through a primary resonant circuit and a secondary winding that is coupled to a load through a secondary resonant circuit. The primary and secondary resonant circuits...http://www.google.com/patents/US6934167?utm_source=gb-gplus-sharePatent US6934167 - Contactless electrical energy transmission system having a primary side current feedback control and soft-switched secondary side rectifier
