Patent ID: 8941315
Filing Date: 2015-01-27
Classification: G05F,H05B,Y02B

Abstract:
1. An apparatus for reducing the amplitude of voltage provided by an alternating current power source comprising: an input terminal for receiving an alternating current from a power source; a common terminal for receiving an alternating current from at least one of a neutral conductor and a return current from a load; a bi-directional buck switch comprising a first port for receiving the alternating current received by means of the input terminal and a second port for distributing the alternating current when the bi-directional buck switch is on; a bi-directional freewheel switch comprising a first port for receiving the alternating current received by means of the common terminal and a second port for distributing the alternating current when the bi-directional freewheel switch is on; a buck inductor comprising a first port for receiving the alternating current distributed by at least one of the bi-directional buck switch and the bi-directional freewheel switch said buck inductor further comprising a second port for distributing the alternating current received by the first port of said inductor; an output terminal for conveying the alternating current distributed by the inductor to the load; a current sensor disposed so as to generate a direction signal according to the direction of current flow in the inductor; and a power controller for controlling in a complimentary manner according to a duty factor and according to the direction signal the bi-directional buck switch and the bi-directional freewheel switch by