Patent ID: 8125208
Filing Date: 2012-02-28
Classification: H01F,H02M,Y02B

Abstract:
1. A transformer device comprising: a transformer having: at least a primary side having a primary winding and a primary core; at least a secondary side having a secondary winding and secondary core, wherein said secondary side is separated from the primary side by an air gap for transmission of electrical energy without electrical connection, and the primary side and secondary side are electrically and mechanically unconnected; and a capacitor connected in series with the primary winding of the transformer, wherein the capacitor forms a resonant circuit together with a leakage inductance of the transformer, wherein the resonant circuit is connected to a frequency controllable current source and a feedback loop from a secondary side of the transformer, wherein the feedback loop includes the transformer and at least one first or second signal transformer in series with the transformer, and wherein the voltage at resonance from the secondary winding is higher than the voltage of the signal level into the series capacitor.