Patent ID: 7522878
Filing Date: 2009-04-21
Classification: A61L,C02F,H02J,H02M,H04B,H04M,H05B,Y02B,Y04S

Abstract:
1. A contactless power supply for inductively providing power to a remote device comprising: a resonant circuit having at least one of a variable capacitor with a variable capacitance and a variable inductor with a variable inductance, said resonant circuit having a variable resonant frequency that varies as a function of said at least one of said variable capacitor and said variable inductor, said resonant circuit having a primary for transferring power to the remote device; a receiver for receiving information from the remote device; a switching circuit electrically coupled to said resonant circuit, said switching circuit operating at a variable operating frequency; a circuit sensor operatively coupled to said resonant circuit, said circuit sensor generating a sensor output; and a controller electrically coupled to said circuit sensor and said receiver wherein said controller is programmed to: