Patent ID: 7920392
Filing Date: 2011-04-05
Classification: H02J,H02M,Y02E

Abstract:
1. A dynamic voltage sag correction device comprising: an input terminal adapted to receive a first operating signal, wherein the first operating signal has a line-to-neutral voltage; an output terminal in electrical communication with the input terminal and through which the first operating signal is provided to a load: a regulator module comprising an injection transformer in electrical communication with the regulator module and adapted to reduce a voltage of the correction signal, wherein a primary winding of the injection transformer is connected across an output of the inverter switching device and a second input terminal adapted to receive the second operating signal, wherein the second operating signal has the line-to-neutral voltage; and a bypass switch in electrical communication with the input terminal and the output terminal, wherein the bypass switch is in a closed position during a normal operating condition such that the injection transformer is bypassed, and further wherein the bypass switch is in an open position during at least a portion of the voltage sag such that the injection transformer is energized.