Procedure and means for monitoring current data in a thyristor-c

Details Procedure and means for monitoring current data in a thyristor-c Procedure and means for monitoring current data in a thyristor-c

1980-12-22

1983-07-12

Shoop, William M.

Electric power conversion systems

Current conversion

Having plural converters for single conversion

363 87, 318801, H02M 717

Patent

active

043934420

ABSTRACT:
A method and apparatus for monitoring current data in a thyristor-controlled direct current drive, the drive system comprising two thyristor bridges converting alternating current into direct current for the drive motor and a current measuring unit. With the aid of a current controller the drive system is caused to operate in one of two different modes of operation, so that as the system approaches zero current condition, the normal mode of operation changes to an oscillating mode, the direct current circuit being monitored with the aid of a delayed current indicator datum in the zero current situation as well.

REFERENCES:
patent: 3320514 (1967-05-01), Lawrence
patent: 3588668 (1971-06-01), Cova
patent: 3713012 (1973-01-01), Johnson
patent: 3996499 (1976-12-01), Gary et al.
patent: 4056767 (1977-11-01), Tobise et al.

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