CURRENT SENSOR Russian patent published in 2012 - IPC G01R19/00 

FIELD: electricity.

SUBSTANCE: sensor includes two Hall probes, two current leads, two amplifiers, reference voltage source and instrument amplifier. Output of the first current lead is connected to input of the second current lead so that current creates magnetic fields in them for the first and the second Hall probes in opposite directions. Outputs of the first and the second Hall probe are connected to inputs of the first and the second amplifier respectively. Outputs of amplifiers are connected to inputs of instrument amplifier the output of which is current sensor output. Output of reference voltage source, which is equal to half the nominal value of voltage of power supply, is supplied to instrument amplifier offset input.

EFFECT: increasing current sensor sensitivity, increasing signal-noise ratio, compensating additive error of Hall probe included in the sensor composition, providing independence of sensor output value from supply voltage pulsations.

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