A three-phase current detection circuit with enhanced immunity

Abstract

The utility model relates to the field of power electronics, specifically disclose a kind of enhanced anti-interference type three-phase current detection circuit, the three-phase current detection circuit includes six IGBT that direct-current power supply is converted into three-phase alternating current, respectively for Q1, Q2, Q3, Q4, Q5 and Q6;The Q2 is connected with first low resistance R1, Q4 is connected with second low resistance R2, first low resistance R1 and second low resistance R2 are arranged on two different phase current paths, detect two phase current signals;The three-phase current detection circuit further includes Hall sensor, the Hall sensor is connected on direct-current auxiliary bus, for the detection of direct-current current measurement.

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