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Three-Phase Busbar Current Transducer
  • Andrey Chirtsov,
  • Pavel Ripka,
  • Vaclav Grim
Andrey Chirtsov
Faculty of Electrical Engineering, Czech Technical University
Pavel Ripka
Faculty of Electrical Engineering, Czech Technical University

Corresponding Author:[email protected]

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Vaclav Grim
Faculty of Electrical Engineering, Czech Technical University

Abstract

A true three-phase 1000 A busbar current transducer is based on 6 microfluxgate sensors. Instead of using three independent single-phase current transducers, w e utilize the full information from each sensor. Tw o TI DRV425 microfluxgate sensors are inserted into the drilled hole of each busbar. Our method of data processing is optimized to compensate the crosstalk betw een three phases and also external fields and gradients up to 2 nd order. The achieved crosstalk compensation betw een the phases w as 0.23 % w orst case. By using the suggested method, the suppression of the external current in the distance of 10 cm is improved by the factor of 25 to 150. Our transducer has the compact size, high temperature offset stability of 8.5 mA/°C, high current range up to 1000 A, low pow er consumption and linearity of 0.1%. The results from 3D-FEM model and analytical computations are confirmed by the measurements.
02 Jan 2024Submitted to TechRxiv
08 Jan 2024Published in TechRxiv