Electrical generator or motor structure – Non-dynamoelectric – Charge accumulating
Patent
1994-07-21
1996-07-23
Dougherty, Thomas M.
Electrical generator or motor structure
Non-dynamoelectric
Charge accumulating
310 40MM, 310 80, 360 9908, H02N 100, H02K 706, G11B 1702
Patent
active
055392679
ABSTRACT:
A motor based on the wobble motor provides pure rotary motion and can be used as a spindle motor for very small disk drives. The primary components of the motor are fabricated using thin film processes. The rotor has inner and outer rings that are interconnected by flexible members, such as semicircularly-shaped spring elements, with the rings and flexible members being formed of the same material. The rotor resides within the wobble motor stator elements that are circumferentially spaced on a substrate. The inner rotor ring is supported by a bearing structure that may be a ball bearing assembly or a pin bearing comprising a post and a restraining cap. The outer rotor ring functions as the wobble motor rotor and rolls around the inside of the stator as the stator elements are sequentially electrostatically activated. The flexible members act as a transmission to convert the wobble motion of the outer rotor ring to pure rotary motion of the inner rotor ring. The motor can function as a disk drive spindle motor by attachment of a data recording disk to the inner rotor ring and use of appropriate control circuitry to drive the motor at constant speed. The disk drive actuator may be attached to the same substrate that supports the stator elements. The stator elements, the rotor, and the bearing assembly may all be fabricated on a suitable substrate using thin film processes, without the necessity of assembly of separate components.
REFERENCES:
patent: 4740410 (1988-04-01), Muller et al.
patent: 4943750 (1990-07-01), Howe et al.
patent: 4997521 (1991-03-01), Howe et al.
patent: 5043043 (1991-08-01), Howe et al.
patent: 5093594 (1992-03-01), Mehregany
patent: 5180940 (1993-01-01), Paratte et al.
patent: 5191251 (1993-03-01), Paratte
patent: 5206983 (1993-05-01), Guckel et al.
patent: 5252881 (1993-10-01), Muller et al.
patent: 5327033 (1994-07-01), Guckel et al.
patent: 5377060 (1994-12-01), Nigam
patent: 5455730 (1995-10-01), Dovek et al.
S. C. Jacobsen et al., "The Wobble Motor: Design, Fabrication and Testing of An Accentric-motion Electrostatic Microactuator", IEEE, 1989, pp. 1536-1546.
S. C. Jacobsen et al., "Design, Analysis, and Experimental Results for the Wobble Motor: An Eccentric-motion Electrostatic Microactuator", SPIE, vol. 1167, Precision Engineering and Optomechanics, 1989, pp. 122-136.
S. C. Jacobsen et al., "Micromotors Split Hairs", IEEE Potentials, Feb. 1991, pp. 12-15.
M. Mehregany et al., "Friction and Wear in Microfabricated Harmonic Side-drive Motors", 1990 IEEE Solid State Sensor and Actuator Workshop-Technical Digest, pp. 17-22.
L. Paratte et al., "A Rigid Ring Electrostatic Harmonic Wobble Motor with Axial Field", 1991 IEEE International Conference on Solid-state Sensors and Actuators, pp. 890-893.
R. H. Price et al., "Field Analysis for the Electrostatic Eccentric Drive Micromotor (`Wobble Motor`)", Journal of Electrostatics, vol. 28, 1992, pp. 7-38.
Fan Long-Sheng
Fontana, Jr. Robert E.
Munce, Jr. Archibald C.
Reiley Timothy C.
Zappe Hans H.
Berthold Thomas R.
Cuneo Christopher
Dougherty Thomas M.
International Business Machines - Corporation
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