Polyphase AC input to DC output voltage converter

Details Polyphase AC input to DC output voltage converter Polyphase AC input to DC output voltage converter

1994-02-24

1995-07-04

Stephan, Steven L.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

H02M 700

Patent

active

054306396

ABSTRACT:
A polyphase input DC power source apparatus for converting an AC power from a polyphase AC power source formed of star-connected secondary windings into a DC power of both positive and negative outputs includes a polyphase chopper circuit connected to each phase of the polyphase AC power source and formed of a reactor excited upon application of a voltage and a switching element for chopping a current flowing in the reactor, a polyphase rectifying circuit for rectifying an output from the polyphase chopper circuit, a capacitor, connected in parallel to a load, for accumulating an output from the polyphase rectifying circuit, connected in parallel to a load, and a controller for monitoring a voltage and current of the AC power source and a voltage applied to the load to control the switching element such that a current flowing in each phase of the polyphase AC power source is proportional to a voltage of each phase.

REFERENCES:
patent: 3823360 (1974-07-01), Grandin de l'Eprevier
patent: 3953783 (1976-04-01), Peters, Jr.
[Untranslated Japanese article] "Denshi Gijutsu," Mar. 1990 (special enlarged issue, pp. 90-99.
R. Saito, Y. Suzuki & K. Seo, "Polyphase Rectifier With Constant-Energy Modulation Technique," Proceeding of Intelec, 1982 IEEE, pp. 321-326.

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