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DC and AC current sensor having a minor-loop operated current transformer
DC and AC current sensor having a minor-loop operated current transformer
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机译:具有次回路操作电流互感器的DC和AC电流传感器
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摘要
Current is sensed by a circuit which provides a high frequency reversing voltage to a sensing winding on a current transformer, for driving the transformer into its linear region at least once per high frequency cycle. Current through the sensing winding is sampled while the transformer is in that linear region. Preferably, the current is sampled approximately at the instants of reversal of the voltage being applied to the sensing winding, and the sample having the lower absolute value is selected as a sample proportional to the line current.
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