Abstract: Process for the heat treatment, in a magnetic field, of a magnetic component made of a low-anisotropy soft magnetic material such as, for example, a 15/80/5 FeNiMo alloy, an amorphous Co-based alloy or a nanocrystalline FeSiCuNbB alloy, in which the magnetic component is annealed at a temperature below the Curie point of the magnetic material and, during the annealing, the magnetic component is subjected to a DC or AC, unidirectional, longitudinal or transverse magnetic field, in which process the magnetic field is applied in the form of a succession of pulses each comprising a first part during which the intensity of the magnetic field reaches a maximum value and a second part during which the intensity of the magnetic field has a minimum value.

Abstract: Process for manufacturing at least one magnetic core made of an iron-based soft magnetic alloy having a nanocrystalline structure, wherein an amorphous ribbon is manufactured from the magnetic alloy, the annealing temperature Tm which, in the case of the ribbon, leads to maximum magnetic permeability, is determined, at least one core blank is manufactured from the ribbon and at least one core blank is subjected to at least one annealing operation, said annealing being carried out at a temperature T of between Tm+10.degree. C. and Tm+50.degree. C. for a temperature hold time t of between 0.1 and 10 hours so as to cause nanocrystals to form.

Abstract: Process for manufacturing a magnetic component made of an iron-based soft magnetic alloy having a nanocrystalline structure, the chemical composition of which is, in at. %, Fe.gtoreq.60%, 0.1%.ltoreq.Cu.ltoreq.3%, 0%.ltoreq.B.ltoreq.25%, 0%.ltoreq.Si.ltoreq.30%, and at least one element selected from niobium, tungsten, tantalum, zirconium, hafnium, titanium and molybdenum with contents of between 0.1% and 30%, the balance being impurities resulting from the smelting, the composition furthermore satisfying the relationship 5%.ltoreq.Si+B.ltoreq.30%, according to which an amorphous ribbon is manufactured from the magnetic alloy, a blank for a magnetic component is manufactured from the ribbon and the magnetic component is subjected to a crystallization heat treatment comprising at least one annealing step at a temperature of between 500.degree. C. and 600.degree. C. for a temperature hold time of between 0.

Abstract: A device is provided for measuring electric current having at least one probe sensitive to magnetic flux arranged in the air gap of an annular core through which at least one conductor of a current to be measured is intended to pass. A compensation winding is wound of the core and a measuring resistor is connected in series with the compensation winding. A circuit is provided for regulating the supply current to the compensation winding regardless of the direction of the current to be measured. The circuit is controlled by the output signal of the sensor which is sensitive to magnetic flux.

Abstract: The method comprises producting a linear coil (4) by winding around a cylindrical mandrel (5) a conductor wire coated with a thermo-adhesive varnish, opening the toroidal magnetic circuit (1), withdrawing the linear coil (4) from the cylindrical mandrel (5), heating the linear coil (4) so as to render it flexible, slapping the linear coil over the open toroidal magnetic circuit (1), reclosing the toroidal magnetic circuit, and allowing the assembly to cool.