Patent ID: 11892475
Assignee: SAFRAN ELECTRICAL & POWER
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. The current sensor according to claim 1, comprising:
four identical pairs of electrical coils; within each pair, the coils have superparamagnetic cores and each pair is surrounded by a shielding braid common to the coils of the pair;
two direct current excitation means, each being configured to make a direct current flow in only one of the coils of each pair, and at least one means of adjusting an intensity of the direct current supplied by each direct current excitation means;
a first alternating current excitation means configured to make an alternating current flow at a first frequency in the coils of each pair that the direct excitation currents flow through;
a second alternating current excitation means configured to make an alternating current at a second frequency greater than the first frequency flow in both coils of each pair of coils;
two means of measuring an electromotive force of the Néel Effect® type, the first measuring means being configured to measure a said electromotive force of the Néel Effect® type at the terminals of the coils of two first pairs and the second measuring means being configured to measure a said electromotive force of the Néel Effect® type at the terminals of the coils of the two other pairs; and
two means of measuring an electromotive force of the Rogowski type at the terminals of two coils that a direct current does not flow through, the two means each comprising two inputs, the inputs of the first being connected to the coils that the direct excitation currents do not flow through of the two first pairs and the inputs of the second being connected to the coils that the direct excitation currents do not flow through of the two other pairs.