MAGNETIZING METHOD OF PERMANENT MAGNET TYPE EDDY CURRENT REDUCER

摘要

PROBLEM TO BE SOLVED: To obtain a magnetizing method of a permanent magnet type eddy current reducer in which magnetization is performed after magnets are coupled to a magnet retaining ring and built in a guide cylinder. ;SOLUTION: An even number of magnets 20 before magnetization are coupled to the outer peripheral surface of a magnet retaining ring 19 composed of magnetic substance, at equal intervals in the peripheral direction. A guide cylinder 18 is composed of nonmagnetic substance and has the same number of ferromagnetic plates 21 as the magnets 20, at equal intervals in the peripheral direction. In the guide cylinder 18, the magnet retaining ring 19 is so accommodated that each of the magnets 20 overlaps perfectly with each of the ferromagnetic plates 21. The guide cylinder 18 is arranged in a magnetizing equipment 50 having magnetic poles 53a facing the magnets 20. By applying a DC current to an electromagnetic coil 52 of a magnetic core 53 of the magnetizing equipment 50, the magnets 20 are magnetized from the outer peripheral side of the magnetic retaining ring 19. By pivoting the magnet retaining ring 19, in such a manner that two magnets 20 adjacent in the peripheral direction to each of the ferromagnetic plates 21 of the guide cylinder 18 overlap with each other partially, the guide cylinder 18 is led out from the magnetizing equipment 50.;COPYRIGHT: (C)1999,JPO