COMPENSATING TYPE TRACKING CURRENT CONVERTER Russian patent published in 2018 - IPC G01R19/257 G01R15/18 

FIELD: electrical engineering; measuring technology.

SUBSTANCE: compensating type tracking current converter relates to electric current measuring devices. Said converter contains magnetic circuit 1 with current 2 and compensating 3 coils. In the air gap of magnetic circuit 1, Hall elements 4 and 5 are installed, which are connected in series along the power supply along the transverse and longitudinal contacts, and, on the outputs, the Hall elements are connected along the transverse and longitudinal contacts on one side with each other, and on the opposite side with instrumentation amplifier 6. Said amplifier’s output is connected to two comparators 7 and 8 which are connected to charge and discharge keys 9, 10 of storage capacitor 12 via current limiting resistor 11, and the storage capacitor is connected to the bridge power amplifier of compensation coil 13. Also, the storage capacitor is connected to converter analog interface unit 14.

EFFECT: technical result of the implementation of the claimed invention is the ability to provide compensation for the residual voltage of Hall elements with their temperature dependence, and practically zero magnetic field in the current conductor, which eliminates eddy currents in the magnetic circuit and its heating when measuring current.

1 cl, 1 dwg