Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Magnetic saturation
Patent
1989-06-29
1990-07-03
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Magnetic saturation
324117H, 324244, 324127, 324252, 336200, 307309, G01R 3300, H01F 4006
Patent
active
049394495
ABSTRACT:
An electric current sensing device for measuring a primary current of relatively high intensity. The device includes a magnetic circuit that is coupled with a primary conductor and with a measuring coil that is connected to a current source through an associated control circuit. The magnetic circuit includes an air gap which accommodates a magnetic field detector that is electrically connected to an input of the control circuit for controlling a magnetic field compensating current that is supplied to the measuring coil. The device also includes a printed circuit that is arranged to both minimize electromagnetic interference between the measuring current circuit and the control circuit input, and improves heat dissipation of the printed circuit, thus optimizing the size ratio of the maximum primary current to the bulk of the device and improving performance of the same.
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Faizuliev, B. N., et al., "Reference Book on Printed Circuits", Soviet Radio magazine, published in Moscow, USSR, 1972.
Cattaneo Pierre
Chuat Rene
Eisenzopf Reinhard J.
Liaisons Electroniques-Mecaniques LEM SA
Nguyen Vinh P.
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