DC power supply device with high voltage and large power handlin

Details DC power supply device with high voltage and large power handlin DC power supply device with high voltage and large power handlin

1996-03-06

1997-09-23

Hecker, Stuart N.

Electric power conversion systems

Cascaded or combined, diverse conversions in which the...

Current and phase

323361, H02M 700, H01F 3012

Patent

active

056711271

ABSTRACT:
Three-phase alternating-current electric energy supplied from a primary power supply is supplied to first and second six-phase transformer-coupled rectifying circuits which are connected in cascade to each other. The first six-phase transformer-coupled rectifying circuit comprises three primary windings connected in delta, and the second six-phase transformer-coupled rectifying circuit comprises three primary windings connected in star, for producing respective output voltages which are .pi./6 out of phase with each other. The first and second six-phase transformer-coupled rectifying circuits, which are connected in cascade to each other, jointly provide a twelve-phase rectifying circuit which produces a reduced harmonic or ripple current in its output energy as compared with a six-phase transformer-coupled rectifying circuit. The two six-phase transformer-coupled rectifying circuits share a voltage applied to the power supply device, and hence may have lower requirements for withstanding a breakdown voltage.

REFERENCES:
patent: 3423664 (1969-01-01), Dewey
patent: 3585484 (1971-06-01), Dortort
patent: 5065303 (1991-11-01), Nguyen et al.
patent: 5317299 (1994-05-01), Dhyanchand et al.
Electrical Engineering Handbook, published in 1988 by Electrical Engineering Society of Japan.
E.A. Abramyan, "Industrial Electron Acelerators and Application", published by Hemisphere Publishing Corporation, pp. 123, p. 126.
Japanese Ministry of Trade and Industry, Department of Resource and Energy, Public Affair Division "A Guideline of Harmonic Suppressing Method for High Voltage or Ultra-high Voltage Power Receiving Station" pub. Sep. 1994, pp. 2, pp. 4 and 6 (of Annex).

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