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DESIGN, ANALYSIS, AND SIMULATION OF IMPULSE MAGNETIZATION SYSTEMS BASED ON SOLENOID MAGNETIZING FIXTURES

DESIGN, ANALYSIS, AND SIMULATION OF IMPULSE MAGNETIZATION SYSTEMS BASED ON SOLENOID MAGNETIZING... Due to their high magnetizing field requirement, the emergence of rareearth based permanent magnets is creating onerous demands on the capacitordischarge systems which are used for their initial magnetization, a process which is aggravated by the fact that the transient current pulse induces eddy currents, which inhibit the penetration of the magnetizing field, and causes heating and stressing of the magnetizing fixture. The problems are compounded in multipole and postassembly magnetization systems, particularly for fine polepitch fields. However this paper concentrates on the premagnetization of magnets in aircored solenoids, which, despite the difficulty in subsequently handling magnetized magnets, remains the most common requirement. It presents a methodology for the design of impulse magnetizing solenoids to produce the amplitude and time to peak of magnetizing field required for a specific generic type and aspect ratio of magnet to be magnetized, and describes a procedure for the subsequent analysis of the complete impulse magnetization system. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png COMPEL: Theinternational Journal for Computation and Mathematics in Electrical and Electronic Engineering Emerald Publishing

DESIGN, ANALYSIS, AND SIMULATION OF IMPULSE MAGNETIZATION SYSTEMS BASED ON SOLENOID MAGNETIZING FIXTURES

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0332-1649
DOI
10.1108/eb051793
Publisher site
See Article on Publisher Site

Abstract

Due to their high magnetizing field requirement, the emergence of rareearth based permanent magnets is creating onerous demands on the capacitordischarge systems which are used for their initial magnetization, a process which is aggravated by the fact that the transient current pulse induces eddy currents, which inhibit the penetration of the magnetizing field, and causes heating and stressing of the magnetizing fixture. The problems are compounded in multipole and postassembly magnetization systems, particularly for fine polepitch fields. However this paper concentrates on the premagnetization of magnets in aircored solenoids, which, despite the difficulty in subsequently handling magnetized magnets, remains the most common requirement. It presents a methodology for the design of impulse magnetizing solenoids to produce the amplitude and time to peak of magnetizing field required for a specific generic type and aspect ratio of magnet to be magnetized, and describes a procedure for the subsequent analysis of the complete impulse magnetization system.

Journal

COMPEL: Theinternational Journal for Computation and Mathematics in Electrical and Electronic EngineeringEmerald Publishing

Published: Jan 1, 1992

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