Electric power conversion systems – Current conversion – Including automatic or integral protection means
Patent
1981-03-16
1983-01-18
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Including automatic or integral protection means
340660, 363138, H02H 7122
Patent
active
043694926
ABSTRACT:
The converter protection device has a number of controlled semiconductor elements. A control unit is connected to the semiconductor elements of the converter for forming firing pulses for the controlled semiconductor elements. Reference blocking intervals for the semiconductor elements are set and actual blocking intervals of the semiconductor elements are set and controlled. A comparator receives and compares the reference and actual blocking intervals. There are also provided a read-only memory for storing the reference blocking intervals, an event counter for counting disturbances detected by comparison of the reference and actual blocking intervals, a memory stage being connected to the event counter and being set if the event counter reaches a predetermined count, and a time-base device connected to the event counter and memory stage for resetting the event counter if the memory stage is not set at the end of a predetermined base time.
REFERENCES:
patent: 3821630 (1974-06-01), Kornrumpf et al.
patent: 3881147 (1975-04-01), Ueda et al.
Moll Klaus
Schulze Helmut
Beha Jr. William H.
Brown Boveri & Cie AG
Greenberg Laurence A.
Lerner Herbert L.
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