Patent ID: 8288958
Filing Date: 2012-10-16
Classification: H02M,H05B

Abstract:
1. A controller device for modifying an AC input power to provide a reduced power AC output power to a load when coupled to the controller device, the AC output power having a series of cut-out pulses in half cycles of the AC output power waveform, the device comprising: a switching system having a plurality of switching elements for positioning the series of cut-out pulses in the half cycles of a waveform of the AC input power to provide said reduced power AC output power; and a switch control system for coordinating opening and closing of the plurality of switching elements to position the series of cut-out pulses in said half cycles, the switch control system including a synchronization system for synchronizing the switching system with timing of said half cycles of the AC input power waveform; wherein the series of cut-out pulses in said half cycles includes at least two cut-out pulses having different durations and different positioning in said half cycles.