Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1990-06-13
1991-02-19
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310326, 318135, H02K 706, H02K 7065
Patent
active
049946986
ABSTRACT:
A vibratory linear motor system employs a comb-shaped electromagnet to excite transverse mechanical oscillations of a relatively thin, spring-like beam. The electromagnet establishes an approximate standing wave on the beam for which brakes mounted on either side of the beam provide independently established boundary conditions and produce rectified linear motion thereof. The brakes may be electromagnetically, magnetostrictively, or piezoelectrically actuated. An electronic control provides modulated currents to the exciter electromagnet and the brakes in order to control the rectified linear motion of the beam.
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patent: 4433273 (1984-02-01), Petersen
patent: 4795956 (1989-01-01), Beck
R. W. Brockett, "On the Control of Vibratory Actuators", Proceedings of the 1987 IEEE Conference on Decision and Control, Dec. 1987, pp. 1-5.
S. Uheha, "Present State of the Art of Ultrasonic Motors", Proceedings of the 9th Symposium on Ultrasonic Electronics, Sendai 1988 Japanese Journal of Applied Physics, vol. 28 (1989), Supplement 28-1, pp. 3-6.
M. Kurosawa et al., Proceedings of the 9th Symposium on Ultrasonic Electronics, Sendai 1988 Japanese Journal of Applied Physics, vol. 28 (1989) Supplement 28-1, pp. 158-160.
R. W. Brockett, "On the Rectification of Vibratory Motion", Proceedings of the 1989 IEEE Conference on Micromechanical Systems, Feb. 20-22, 1989, pp. 1-4.
J. L. Butler, "Application Manual for the Design of Etrema Terfenol-D Magnetostrictive Transducers", 1988.
Brockett Roger W.
Jones Donald W.
Kliman Gerald B.
Tompkins Russell E.
Breedlove Jill M.
Davis Jr. James C.
General Electric Company
Rebsch D. L.
Snyder Marvin
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