초록 ▼

The inventive methods and devices may be used in power factor correction, voltage and/or current harmonic filtering and neutralization, line and load conditioning, control of power transfer between two power grids, and programmable control of surges, sags, dropouts and most other voltage regulation

The inventive methods and devices may be used in power factor correction, voltage and/or current harmonic filtering and neutralization, line and load conditioning, control of power transfer between two power grids, and programmable control of surges, sags, dropouts and most other voltage regulation problems.

대표청구항 ▼

[ I claim:] [1.] A single stage AC to AC power controller for controlling an AC input voltage to a load, the input voltage having one or more phases, the controller comprising:a circuit comprised of four independently controllable switches and at least one inductor, one such circuit for each input l

[ I claim:] [1.] A single stage AC to AC power controller for controlling an AC input voltage to a load, the input voltage having one or more phases, the controller comprising:a circuit comprised of four independently controllable switches and at least one inductor, one such circuit for each input line to be regulated, the switches and inductor(s) of the circuit arranged in a conventional power regulator topology, whereby a selected regulator topology may be implemented, depending upon the position of the inductor(s) with respect to the switches and to the input voltage;the controller further comprising logic control having a polarity detector in parallel with the input voltage, the polarity detector having two outputs; anda duty cycle modulator having two outputs; each of the outputs of the polarity detector and of the duty cycle modulator being inverted with respect to one another;wherein the logic control separately controls each switch so that there is always an electrically conducting path through the switches wherein there is at least one switch conducting.