Experimental technique of identification of high-coercive permanent magnets

Abstract

The stand is developed and the experimental technique of identification of pilot batch of the high-coercive permanent
magnets made of the same brand of alloy neodymium — an ironpine forest (NdFeB) is offered. Prototypes of permanent magnets have the form of a disk and a rectangular prism, the axial direction of magnetization. Criterion of identification of permanent magnets in each pilot batch is their identical volume magnetization which is considered by a mean square deviation of the constructed experimental curve dependences of electromagnetic force of interaction of each prototype of a permanent magnet with the magnetic reflector at change of distance between them. As the magnetic reflector more powerful permanent magnet having the form of a disk and height exceeding height of a prototype of a permanent magnet is used. The neglect the procedure of identification of permanent magnets in pilot batch leads to violation of work of electromagnetic systems with their participation, so for example when developing inductors of synchronous electrical machines on the basis of permanent magnets beats of a shaft, the increased vibrations of working bodies, increase in radial and axial load of bearings are observed, service life and failure in the functioning of electrical machines during operation is reduced.