High performance linear motor and magnet assembly therefor

Electrical generator or motor structure – Dynamoelectric – Linear

Reexamination Certificate

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Details

C310S015000, C310S013000, C310S014000, C310S023000, C310S027000

Reexamination Certificate

active

07145271

ABSTRACT:
A magnet assembly includes a back iron and an array of magnets. The back iron is in the form of a plate having opposed surfaces. The magnets are arranged along one of the surfaces, with the other surface being dimensioned and configured according to the magnetic field distribution associated with the magnets. The back iron geometry provides for reduced mass, reduced leakage flux, and high flux densities to improve performance of a linear motor that employs such a magnet assembly.

REFERENCES:
patent: 5734209 (1998-03-01), Hallidy
patent: 6016021 (2000-01-01), Hinds
patent: 6097114 (2000-08-01), Hazelton
patent: 6380661 (2002-04-01), Henderson et al.
patent: 6455957 (2002-09-01), Chitayat
patent: 6803682 (2004-10-01), Thirunarayan et al.
patent: 6919653 (2005-07-01), Thirunarayan et al.
patent: 2001145328 (2001-05-01), None
patent: 2001197717 (2001-07-01), None
James R. Hendershot, et al. “Design of Brushless Permanent-Magnet Motors”, Dec. 1994, vol. 37, Oxford University Press.

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