scholarly journals Experience with measuring magnetic moments of permanent magnet blocks at Lawrence Berkeley Laboratory

1988 ◽  
Vol 24 (2) ◽  
pp. 1098-1101 ◽  
Author(s):  
D.H. Nelson ◽  
P.J. Barale ◽  
M.I. Green ◽  
D.A. Van Dyke
Keyword(s):  
Permanent Magnet ◽  
Magnetic Moments ◽  
Lawrence Berkeley Laboratory

scholarly journals Up Close: Center for Advanced Materials at Lawrence Berkeley Laboratory

MRS Bulletin ◽  
1986 ◽  
Vol 11 (4) ◽  
pp. 27-27 ◽  
Author(s):  
John J. Gilman
Keyword(s):  
Materials Science ◽  
Magnetic Moments ◽  
National Laboratory ◽  
National Policy ◽  
Chemical Properties ◽  
Educational Process ◽  
University Of California ◽  
Advanced Materials ◽  
Lawrence Berkeley Laboratory ◽  
The University

The boundaries between the present performance of materials and the requirements of device designers have for centuries been moving forward. The steps taken to draw these two together are sometimes large; more often they are small. As they occur, we find materials that are stronger, have larger magnetic moments, have higher electron mobilities, etc. Each time the property profile improves, understanding of the physical and chemical properties advances, and new engineering devices based on the improved profile are invented and developed.The purpose of the Center for Advanced Materials (CAM) at the Lawrence Berkeley Laboratory (LBL) is to enhance the inter-play between advances in the property profiles of materials and advances in the chemical and physical understanding of them. For this purpose, the location of CAM can be described as ideal. The proximity of this national laboratory to the campus of the University of California at Berkeley provides an unusually rich intellectual setting for the Center. It also provides unique opportunities for the University students and faculty who conduct materials-related research. Indeed, the arrangement should be a model for similar organizations, and it represents a solid method for strengthening materials science and technology throughout the nation.National policy in critical materials has given the national laboratories—including LBL—strong direction and incentive to collaborate with industry and the research universities. This incentive led to the establishment of CAM in order to build on the symbiosis between LBL and the University of California at Berkeley. It strives to extend this symbiosis by bringing industry into the ongoing educational process and by making its special facilities more readily available to industrial researchers.

Applications of Rare-Earth Permanent Magnet Structures to Electrical Machinery

1999 ◽  
Vol 577 ◽  
Author(s):  
H.A. Leupold ◽  
A.S. Tilak ◽  
R.J. Marchand ◽  
D.A. Lagraffe
Keyword(s):  
Rare Earth ◽  
Magnetic Flux ◽  
Permanent Magnet ◽  
Magnetic Moments ◽  
Computer Calculation ◽  
Electrical Machinery ◽  
Moments Of Inertia ◽  
Electric Generator

ABSTRACTA variety of promising permanent magnet structures based upon the magic cylinder and magic mangle concepts are investigated with regard to their suitability for application to electrical generators and motors. Such structures feature high magnetic flux densities in large volumes relative to their masses and bulks as well as minimal stray fields and net magnetic moments. Magic mangles also afford small moments of inertia of their rotating elements thereby resulting in improved rotational responsiveness. One computer calculation showed that a small conventional electric generator can be replaced by a magic mangle with 70% more flux amplitude but with only one half the mass and bulk.

NEW PERMANENT MAGNET DEVICES

1984 ◽  
Vol 45 (C1) ◽  
pp. C1-285-C1-291 ◽  
Author(s):  
R. Pauthenet
Keyword(s):  
Permanent Magnet

A novel analytical calculation of magnetic field in the slotted air gap of spoke-type permanent-magnet machines using conformal mapping

2020 ◽  
pp. 1-15
Author(s):  
Jianqi Li ◽  
Yu Zhou ◽  
Jianying Li
Keyword(s):  
Magnetic Field ◽  
Conformal Mapping ◽  
Permanent Magnet ◽  
Flux Density ◽  
Analytical Method ◽  
Electromotive Force ◽  
Analytical Calculation ◽  
Air Gap ◽  
Permanent Magnet Machines ◽  
Peak Value

This paper presented a novel analytical method for calculating magnetic field in the slotted air gap of spoke-type permanent-magnet machines using conformal mapping. Firstly, flux density without slots and complex relative air-gap permeance of slotted air gap are derived from conformal transformation separately. Secondly, they are combined in order to obtain normalized flux density taking account into the slots effect. The finite element (FE) results confirmed the validity of the analytical method for predicting magnetic field and back electromotive force (BEMF) in the slotted air gap of spoke-type permanent-magnet machines. In comparison with FE result, the analytical solution yields higher peak value of cogging torque.

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