System for supply of direct current to at least two electrical l

Details System for supply of direct current to at least two electrical l System for supply of direct current to at least two electrical l

1986-10-01

1988-02-16

Wong, Peter S.

Electric power conversion systems

Current conversion

Having plural converters for single conversion

363 88, 373108, H02M 7155

Patent

active

047259396

ABSTRACT:
A system for supply of direct current to at least two electrical loads having a common polarity, especially for power supply to an arc furnace with several electrodes or to plasma generators, comprises a set of load-controlled rectifiers (7) arranged in a Graetz bridge (A, B, C), in parallel upon a common alternating current power supply (5, 6). The half-bridges (A.sub.2, B.sub.2, C.sub.2) situated on the common-polarity side have a common dephasing control voltage, while the half-bridges (A.sub.1, B.sub.1, C.sub.1) situated on the other side are each controlled individually. This mechanism can be used in particular for power supply to arc furnaces or plasma torches.

REFERENCES:
patent: 3949151 (1976-04-01), Kerton
patent: 3953781 (1976-04-01), Forster et al.
patent: 4586188 (1986-04-01), Buhler

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