DC power supply circuit

Details DC power supply circuit DC power supply circuit

1994-12-19

1996-11-19

Wysocki, Jonathan

Electrical transmission or interconnection systems

Plural load circuit systems

Circuit arrangements or layouts

307 11, 307 39, 335 2, 335 7, 335 18, 361 42, 361 93, 361139, H02J 906

Patent

active

055765807

ABSTRACT:
A dc power supply circuit connects a plurality of dc circuit breakers to a semi-conductor converter, returning again to the semi-conductor converter through a dc driving part such as an electric railcar connected to each dc circuit breaker. A second dc circuit breaker of larger capacity than the above-mentioned dc circuit breakers is provided in a return circuit and opened when a short circuit current is detected. A current decreasing means opens the second dc circuit breaker to decrease the short circuit current and includes, for example, a series-circuit of a resistor R and a reactor L. The dc power supply circuit has a large interruption capacity with low resistance loss.

REFERENCES:
patent: 3529210 (1968-02-01), Ito
patent: 4266258 (1981-05-01), Eidinger
patent: 4442472 (1984-04-01), Pang et al.
patent: 4849848 (1989-07-01), Ishii
patent: 5369542 (1994-11-01), Leone et al.

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