Patent ID: 7737667
Filing Date: 2010-06-15
Classification: G05F

Abstract:
1. A method of commutating between a plurality of transformer taps in a voltage of at least one of a plurality of transformers in a regulating device, the method comprising: using an open delta connection transformer device; using a single commutation circuit; monitoring an output with a controller; maintaining continuity of current while maintaining an correct output voltage; activating a commutation silicon controlled rectifier (SCR) of said single commutation circuit; passing only a fraction of a load current through a commutation resistor; removing a tap gating signal from a first SCR of a plurality of SCRs connected to a first tap of said plurality of transformer taps of said at least one plurality of transformers; firing a second SCR of said plurality of SCRs connected to a second tap of said plurality of transformer taps; and deactivating said commutation SCR.