Patent ID: 8618903
Filing Date: 2013-12-31
Classification: H01F

Abstract:
1. A power supply apparatus for low impedance loads, comprising: a transformer having a primary winding and a secondary winding, whereby magnetic flux generated by a varying primary voltage applied to the primary winding induces a secondary voltage on the secondary winding; a torroidal transformer core over which said primary winding and secondary winding are applied, wherein at least a portion of the secondary winding is spatially separated from said primary winding; at least one magnetic shunt arranged to provide a diversion path for magnetic flux generated by the primary winding which diverts magnetic flux from the secondary winding; and a control coil operatively associated with the at least one magnetic shunt, the control coil adapted to be connected to a variable resistance whereby the control coil can dynamically modify the reluctance of the at least one magnetic shunt thereby dynamically modifying the maximum output current capable of being delivered by the power supply apparatus.