Design formulas for the strength, compensation and trimming of hybrid permanent magnets

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Hybrid permanent magnets provide an economical source of fixed- strength magnets. The field shape is controlled by the shape and condition of iron pole tips while the strength is determined by geometry and the quantity and quality of the permanent magnetic materials. We will derive here simple formulas for calculating the strength of simple hybrid magnets when driven by materials with linear {bold B-H} curves in the region of interest ( SEM). We will also show how to tune the strength by shunting flux with iron shims to change gap heights. The same calculational techniques will allow design of temperature ... continued below

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43 p.

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Brown, B.C. December 31, 1996.

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Description

Hybrid permanent magnets provide an economical source of fixed- strength magnets. The field shape is controlled by the shape and condition of iron pole tips while the strength is determined by geometry and the quantity and quality of the permanent magnetic materials. We will derive here simple formulas for calculating the strength of simple hybrid magnets when driven by materials with linear {bold B-H} curves in the region of interest ( SEM). We will also show how to tune the strength by shunting flux with iron shims to change gap heights. The same calculational techniques will allow design of temperature compensation based on shunting flux in a temperature dependent fashion using ferromagnetic materials with a low Curie temperature.

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43 p.

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OSTI as DE97051163

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  • American Physical Society and the American Association of Physics Teachers joint meeting, Indianapolis, IN (United States), 2-5 May 1996

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  • Other: DE97051163
  • Report No.: FNAL/C--96/273
  • Report No.: CONF-9605189--8
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 431658
  • Archival Resource Key: ark:/67531/metadc676019

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 31, 1996

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  • July 25, 2015, 2:20 a.m.

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  • April 1, 2016, 6:20 p.m.

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Brown, B.C. Design formulas for the strength, compensation and trimming of hybrid permanent magnets, article, December 31, 1996; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc676019/: accessed July 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.