Electric power conversion systems – Current conversion – Including automatic or integral protection means
Patent
1994-09-09
1997-01-07
Hecker, Stuart N.
Electric power conversion systems
Current conversion
Including automatic or integral protection means
363 50, 363 37, 363 35, H03K 1772
Patent
active
055923690
ABSTRACT:
A device in a system for power transmission by means of high voltage direct current wherein: a first current path and a second current path are interconnected at a branch point; a first semiconductor connection is connected into the first current path only and which is controllable between conducting and non-conducting states and vice versa; a second semiconductor connection having a diode function and which is connected into the second current path only; a capacitor branch comprising a capacitor and connected between a first connection point on the first current path and a second connection point on the second current path; the first connection point and the branch point are located on opposite sides of the first semiconductor connection; the second connection point and the branch point are located on opposite sides of the second semiconductor connection; and control members for controlling, in dependence on the voltage across the capacitor, the first semiconductor connection between a non-conducting and a conducting state.
REFERENCES:
patent: 4360743 (1982-11-01), Stokes
patent: 4805083 (1989-02-01), Konopka
Asea Brown Boveri AB
Hecker Stuart N.
Krishnan Aditya
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