Method of adjusting linearity

Details Method of adjusting linearity Method of adjusting linearity

1994-04-05

1996-09-17

Fleming, Fritz M.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

361267, 361148, 307101, H01F 1300

Patent

active

055574939

ABSTRACT:
A linear permanent magnet position sensor is produced by a novel permanent magnet demagnetization process. Demagnetization field strength is controlled to demagnetize a thinner portion of the permanent magnet less than, equally, or greater than a thicker portion of the same permanent magnet. Linearity and stability are both tailored through a single demagnetization step.

REFERENCES:
patent: 3596144 (1971-07-01), Cunningham
patent: 3609611 (1971-09-01), Parnell
patent: 3708727 (1973-01-01), Wielebski et al.
patent: 4074197 (1978-02-01), Bader
patent: 4104591 (1978-08-01), Reuting
patent: 4354218 (1982-10-01), Steingrover et al.
patent: 4782293 (1988-11-01), Steingroever et al.
patent: 4873605 (1989-10-01), Drits et al.
patent: 5053893 (1991-10-01), Hayata et al.
"Permanent Magnet Guidelines", Magnet Materials Producers Association, Dec., 1987, pp. 18-24.

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