Rare-earth Iron Permanent Magnets

Rare-earth Iron Permanent Magnets

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Rare-earth iron permanent magnets combine the magnetization of iron or cobalt with the anisotropy of a light rare-earth in intermetallic compounds which exhibit nearly ideal hysteresis. The rare-earth iron magnets are now indispensable components of a vast range of electronic and electromechanical devices. This book covers the principles of permanent magnetism, magnet processing, and applications in a series of interlocking chapters written by experts in each area. Born of experience of the Concerted European Action on Magnets, it is a definitive account of the field, designed to be read by physicists, materials scientists, and electrical engineers.These switches control the flow of current in the multiphase winding according to the rotor position in order to give maximum ... Figure 10.13a shows the basic circuit diagram of a two-pole, four-phase, star connected brushless d.c. motor.

Title:Rare-earth Iron Permanent Magnets
Author: J. M. D. Coey
Publisher:Oxford University Press - 1996

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