Electric power conversion systems – Current conversion – With means to selectively provide d.c. of either polarity
Patent
1982-11-29
1986-07-15
Beha, Jr., William H.
Electric power conversion systems
Current conversion
With means to selectively provide d.c. of either polarity
318341, 318599, 363 98, H02P 1332
Patent
active
046009833
ABSTRACT:
A digital current regulator circuit for a DC load that is connected within a transistor bridge circuit for multi-quadrant operation contains a digital comparator to which binary actual value codes and theoretical value codes are applied as well as a control unit for the time-discrete unipolar control of the transistors in dependence on a central timing signal. To avoid current distortions when the polarity of the load current changes, a blocking circuit is provided, by means of which the bridge circuit can be blocked when the polarity of the theoretical value code changes. A release circuit is also provided that terminates the blockage as soon as the load current actually becomes zero.
REFERENCES:
patent: 3320514 (1967-05-01), Lawrence
patent: 3515977 (1970-06-01), Diczhazy
patent: 3551782 (1970-12-01), Maynard
patent: 3764885 (1973-10-01), Buxbaum et al.
patent: 4314325 (1982-02-01), Siebert
patent: 4409527 (1983-10-01), Sommeria
patent: 4454573 (1984-06-01), Petsch et al.
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