Procedure for the selection of a bridge or bridge section in a r

Details Procedure for the selection of a bridge or bridge section in a r Procedure for the selection of a bridge or bridge section in a r

1990-01-04

1991-07-09

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to selectively provide d.c. of either polarity

363 70, 363 89, 363127, H02M 723

Patent

active

050310879

ABSTRACT:
In a procedure for the selection of a bridge or bridge section in a rectifier bridge unit having a bridge or bridge section conducting in one direction and another bridge or bridge section conducting in the other direction, said bridges or bridge sections having solid-state switches, selection of the bridge or bridge section is based on the direction of the actual value of the current when the actual current has an essentially non-zero value, on the reference value of the current when the actual current value is essentially zero and the reference value of the current is essentially other than zero, or, when both the actual and reference values of the current are essentially zero, on a signal controlling the selection of the bridge or bridge section during the zero-current condition, which signal directs the bridge control signals alternatively to either bridge or bridge section. A bridge selector unit includes circuits for implementing this procedure.

REFERENCES:
patent: 4362976 (1982-12-01), Fujioka et al.
patent: 4393442 (1983-07-01), Kahkipuro
patent: 4399499 (1983-08-01), Butcher et al.
patent: 4473757 (1984-09-01), Farago et al.
patent: 4730242 (1988-03-01), Divan
patent: 4882664 (1989-11-01), Pennington

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