Voice coil motor with linearized force constant

Details Voice coil motor with linearized force constant Voice coil motor with linearized force constant

1988-12-20

1990-03-13

Stephan, Steven L.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Having power driven transducer assembly

310 12, 360106, 360109, 369219, 369249, G11B 700, G11B 554, G11B 2108

Patent

active

049088165

ABSTRACT:
A linear motor with uniform force constant across the full stroke length achieved by varying the width of the air gap face area of the permanent magnet such that the width is reduced towards the center of the magnet in relation to the widths at the ends thereof to compensate for reducing field strength at the magnet ends caused by fringing effects on the field.

REFERENCES:
patent: 4462054 (1984-07-01), Dong et al.
patent: 4583212 (1986-04-01), Koide et al.
patent: 4594627 (1986-06-01), Yiskochil et al.
patent: 4740946 (1988-04-01), Yumura et al.
patent: 4791508 (1988-12-01), Augeri et al.
patent: 4792707 (1988-12-01), Katanuma
patent: 4823219 (1989-04-01), Ueda et al.
patent: 4823336 (1989-04-01), Inada et al.

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