Electricity: motive power systems – Nonmagnetic motor
Patent
1989-11-27
1991-03-19
Budd, Mark O.
Electricity: motive power systems
Nonmagnetic motor
310316, 310323, H01L 4108
Patent
active
050014048
ABSTRACT:
At least two vibration detection electro-mechanical energy conversion element areas substantially centered on the antinodes of both the standing waves are arranged between the group of driving electro-mechanical energy conversion element areas. Amplitudes of two standing waves generated upon application of AC voltages to these groups and a time-phase difference between the standing waves can be accurately detected. The amplitudes of the standing waves can be made equal to each other, and the time-phase difference can be set to be .pi./2, thereby obtaining an ideal vibration state of a travelling vibration wave generated in a vibration plate.
REFERENCES:
patent: 4510411 (1985-04-01), Makamata et al.
patent: 4692649 (1987-09-01), Izukawa et al.
patent: 4727276 (1988-02-01), Izukawa et al.
patent: 4743788 (1988-05-01), Takagi et al.
patent: 4749896 (1988-06-01), Suzuki et al.
Budd Mark O.
Canon Kabushiki Kaisha
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