Power converter system

Details Power converter system Power converter system

1978-10-06

1981-01-13

Shoop, William M.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 44, 363 79, 363128, H02P 1326

Patent

active

042452937

ABSTRACT:
In a power converter system wherein each thyristor of a three-phase full-wave bridge circuit having thyristors connected in all of bridge arms is fired for its controlling to thereby control the dc output voltage, when the dc output voltage is low, the firing angle of a group of thyristors on the negative side is fixed to a large value and the firing angle of a group of thyristors on the positive side is rendered variable within a small range so that a period may occur through which two thyristors connected in series in the full-wave bridge circuit are fired simultaneously. When the dc output voltage is high, the firing angles of groups of thyristors on both the positive and negative sides are made equal to each other and varied simultaneously. The system improves power factor and form factor over the entire controlling range of the dc output voltage.

REFERENCES:
patent: 3641356 (1972-02-01), Ekstrom
patent: 3971975 (1976-07-01), Genuit
patent: 4020411 (1977-04-01), Tsuboi et al.

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