Alternating current rectifier bridge and system for measuring av

Details Alternating current rectifier bridge and system for measuring av Alternating current rectifier bridge and system for measuring av

1998-09-03

1999-10-05

Berhane, Adolf Deneke

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 84, 363128, H02M 7155

Patent

active

059634413

ABSTRACT:
A three-phase controlled rectifier bridge for converting alternating current to direct current includes six segments for each of the positive and negative polarities of each of three AC phases. Each of the segments has a semiconductor controlled rectifier element responsive to a control signal to control current conduction within the segment. A conduction monitor, which is provided for each of the AC phases, monitors a corresponding one of the AC phases to provide a conduction monitor signal. A first shunt current sensor senses current of the segments for the positive polarity of the AC phases and provides a first current signal. A second shunt current sensor senses current of the segments for the negative polarity of the AC phases and provides a second current signal. A control and monitoring circuit has outputs which output the control signals to the segments to control current conduction within the segments, and a microprocessor-based firmware routine which employs the conduction monitor signals and the first and second current signals to determine an average current for each of the segments.

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