Controlled rectifier bridge, control system, and method for controlling rectifier bridge by disabling gate control signals
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United States of America Patent
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Feb 14, 2006
Grant Date -
Apr 29, 2004
app pub date -
Oct 28, 2002
filing date -
Oct 28, 2002
priority date (Note) -
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Abstract
A controlled rectifier bridge includes a plurality of segments each having an element responsive to a control signal, and an output having a voltage, a first current and a second current. Sensors provide sensed current values from first and second output currents from the bridge. A routine determines if the sensed current values are greater than a predetermined value. A regulator outputs the control signals to the segments in order to control current conduction within the segments. A routine determines if a circuit interrupter is open or if current is not flowing between bridge inputs and the corresponding alternating current phases. A routine disables the control signals to pairs of the segments when the sensed current values are greater than the predetermined value, and when the circuit interrupter is open or when current is not flowing between the inputs and the corresponding alternating current phases.
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