Efficient magnetic motor armatures

Details Efficient magnetic motor armatures Efficient magnetic motor armatures

1993-08-11

1994-03-22

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Linear

310156, H02K 4102

Patent

active

052967670

ABSTRACT:
A permanent magnet motor or actuator, such as the voice coil motors used in disk drives to position read/write heads, with an armature to magnet interface or junction modified to expand the magnetic material into regions of the armature that carry less than the maximum possible magnetic flux so as to have increased flux strength without inducing leakage of the flux out of the armature. Reduced flux regions include outside corners of the armature, places where the flux divides into two paths, and parts of the armature that have comparatively longer flux lines.

REFERENCES:
patent: 4414657 (1983-11-01), Arquie et al.
patent: 4450547 (1984-05-01), Nakamura et al.
patent: 4498023 (1985-02-01), Stout
patent: 4546277 (1985-10-01), Carbonneau et al.
patent: 4763314 (1988-08-01), McCaslin et al.
patent: 4882508 (1989-11-01), Mawla
patent: 4945330 (1990-07-01), Arita
patent: 5191256 (1993-03-01), Reiter, Jr. et al.
Lillig, "Dynamic Force Factor of a Linear Voice Coil Motor", 1988-1989, pp. 13-21.
Chai et al., "Voice Coil Motors For Disk Storage Applications," 1988-1989, pp. 143-154.
Heine et al., "A Comparison of Rotary Actuator Structure and design Parameters versus Performance", 1988-1989, pp. 155-161.
Lissner et al., "Empirical Evaluation of Voice Coil Motors For Disk Storage Applications," 1988-1989, pp. 29-33.

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