Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1986-08-01
1987-08-11
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
60721, 62467, 116DIG22, 310321, 310328, 310316, H01L 4108
Patent
active
046864075
ABSTRACT:
This invention is an improved traveling wave ring resonator utilizing only one source of waves. The standard traveling wave ring resonator uses two wave sources phased 90 degrees apart and physically separated by a quarter wavelength to separately excite two equal-frequency standing wave modes which make up a traveling wave. The present invention uses perturbations of the ring resonator to shift the frequency of the standing wave modes, by specified amounts, and to correctly fix their position, to allow a single wave source to properly excite the standing wave modes which comprise a traveling wave. This invention has application to traveling wave ring resonators in acoustics, mechanical devices, and electromagnetic devices, as well as to simply-connected resonators to be excited in rotating wave modes. Specific applications include improved thermoacoustic traveling wave heat engines and pumps, simplified surface wave motors, and energy efficient wave pools for recreational purposes.
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patent: 4114380 (1978-09-01), Ceperley
patent: 4355517 (1982-10-01), Ceperley
patent: 4504760 (1985-03-01), Yamamoto et al.
patent: 4510411 (1985-04-01), Hakamata et al.
patent: 4546498 (1970-12-01), McMaster et al.
patent: 4562374 (1985-12-01), Sashida
Dielectric Resonators by R. D. Richtmyer, Journal of Applied Physics, vol. 10, 1939, pp. 391-398.
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