Controlled bridge rectifier

Details Controlled bridge rectifier Controlled bridge rectifier

1982-10-07

1984-07-17

Shoop, William M.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363129, H02M 7155

Patent

active

044609507

ABSTRACT:
A rectifier system in which the harmonic content of the A.C. current is reduced in a particularly efficient manner. Two or more 3-phase thyristor bridges are connected in parallel to the A.C. supply, and to the DC output by way of interphase-transformers. For the positive thyristors, and for the negative thyristors separately, the conduction transitions within each bridge are staggered from one bridge to the next so that the total conduction on each phase follows a stepped characteristic approaching a sine wave and thus having a smaller harmonic content than a comparable arrangement having uniform firing angles from bridge to bridge.

REFERENCES:
patent: 3431483 (1969-03-01), Lafuze
patent: 3657633 (1972-04-01), Urish
patent: 3739253 (1973-06-01), Humphrey et al.
patent: 4131936 (1978-12-01), Gemp
patent: 4225914 (1980-09-01), Hirata et al.
patent: 4245293 (1981-01-01), Terunuma et al.
patent: 4276589 (1981-06-01), Okawa et al.
patent: 4361866 (1982-11-01), Shima et al.

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