Patent ID: 6301128
Filing Date: 2001-10-09
Classification: B60L,H02J,H02M,Y02T

Abstract:
A contactless electrical energy transmission system for coupling an electric power source to a load, comprising in combination:a transformer having a primary winding and a secondary winding;a variable-frequency inverter coupling said electric power source to said primary winding of said transformer, said variable-frequency inverter comprising a controllable switching device and a resonant circuit,a controlled rectifier coupling said secondary winding of said transformer to said load, said controlled rectifier including a controllable switching device,a first control circuit connected entirely on the primary side of said transformer, said first control circuit responsive to the voltage changes of said power source; said first control circuit arranged to vary the switching frequency of said inverter so that the current through said primary winding of said transformer is maintained substantially constant when the voltage of the power source changes;a second control circuit connected entirely on the secondary side of said transformer, said second control circuit responsive to the changes of said load, said second control circuit arranged to maintain the regulation of load voltage by controlling the amount of energy transferred through said controlled rectifier.