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

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.
Authors:
Publication Date:
OSTI Identifier:
431658
Report Number(s):
FNAL/C--96/273; CONF-9605189--8
ON: DE97051163
DOE Contract Number:
AC02-76CH03000
Resource Type:
Conference
Resource Relation:
Conference: American Physical Society and the American Association of Physics Teachers joint meeting, Indianapolis, IN (United States), 2-5 May 1996; Other Information: PBD: [1996]
Research Org:
Fermi National Accelerator Lab., Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Energy Research, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; 36 MATERIALS SCIENCE; PERMANENT MAGNETS; DESIGN; MAGNETIC PROPERTIES; MAGNETIC MATERIALS; IRON; MATHEMATICAL MODELS; CURIE-WEISS LAW