초록 ▼

A three-phase AC/DC active power converter provides an H-bridge that is controlled by a DSP (digital signal processing) controller that places the H-bridge in a voltage-boost mode of operation when voltage of a DC-link capacitor maintained by the H-bridge is near than the voltage input from a three-

A three-phase AC/DC active power converter provides an H-bridge that is controlled by a DSP (digital signal processing) controller that places the H-bridge in a voltage-boost mode of operation when voltage of a DC-link capacitor maintained by the H-bridge is near than the voltage input from a three-phase power source. The voltage difference between the boosted DC-link voltage and the three-phase power source voltage provides a voltage potential thereby giving the control loops a possible gain value. The gain value provides loop stability to thereby prevent an inrush of electrical current into the power converter upon startup. The converter also allows harmonic distortion to be modified through wave shaping of the normally pure sinus conduction signal.

대표청구항 ▼

What is claimed is: 1. A poly-phase AC/DC active power converter to convert AC power from a poly-phase variable frequency power source into DC power, comprising:an H-bridge converter maintaining a capacitor at its output, said converter adapted to receive each of the phases of AC power source at its

What is claimed is: 1. A poly-phase AC/DC active power converter to convert AC power from a poly-phase variable frequency power source into DC power, comprising:an H-bridge converter maintaining a capacitor at its output, said converter adapted to receive each of the phases of AC power source at its input through respective line reactors inline therewith; anda controller coupled to said H-bridge converter to control said converter in accordance with a control structure, wherein upon the initial powering of said H-bridge, said controller enters a voltage boost mode, such that said line reactors are charged and discharged into said capacitor to raise its voltage above that of said power source, to generate a gain value used by said control structure to control the current consumed from the power source, so as to maintain a constant output voltage during the start up of a normal AC/DC conversion mode, so as to reduce an inrush of current during the conversion of AC power into DC power.