INSTRUMENT FOR MEASUREMENT OF SPECTRUM OF INDUCTION SIGNAL IN MAGNETICALLY LINKED SYSTEM Russian patent published in 2012 - IPC H02N11/00 G01R31/34 

FIELD: electricity.

SUBSTANCE: invention relates to the field of electrical engineering and physics of magnetism and is designed to research a domain structure of ferromagnetic materials. An instrument is proposed to measure a spectrum of an induction signal in a magnetically linked system, comprising magnetized components - a rotating rotor and a fixed stator from a ferromagnetic substance, into a magnetic circuit of which a magnetisation coil is connected, differing by the fact that the magnetisation coil is fixed on the stator and is connected to the first controlled AC source via a serially joined primary winding of a transformer, the secondary winding of which is connected to serially connected a wideband low-noise amplifier, a spectrum analyser and a recording device, for instance, a computer, to the other input of which an output of a frequency metre is connected, with its input joined to an electromagnetic sensor of rotor rotation frequency, rotation of which is realised from the second controlled DC source, connected via a reversing switch to the stator winding, one part of each turn in which is arranged in a magnetic gap between the rotor and stator forming a cylindrically circular gap, and their other part is pulled through holes in the stator body, arranged equidistantly at a certain circumference, which is concentric to the axis of rotor rotation, and axes of symmetry of the specified holes are parallel to the axis of rotor rotation. In particular, based on use of this instrument, characteristics of used ferromaterials may be established - their domain structure, magnetic homogeneity, magnetic adhesion and its dynamics and others.

EFFECT: higher efficiency to detect breaks of freezing-in of magnetic power lines under mutual displacement of magnetised ferromagnetics and expanded functional capabilities of a metre.

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