Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1997-08-04
1999-06-08
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
318116, H01L 4108
Patent
active
059106980
ABSTRACT:
Disclosed are a method of and an apparatus for controlling piezoelectric vibration in an apparatus comprising a piezoelectric vibrating element, a vibrating unit such as a parts feeder to which the piezoelectric vibrating element is attached, and a driving unit for driving the piezoelectric vibrating element. The piezoelectric vibration control is performed by vibrating the piezoelectric vibrating element at a frequency at which the vibrating unit does not vibrate substantially; detecting a voltage, a current, and a phase difference between the voltage and the current while the piezoelectric vibrating element is driven at that frequency; driving the piezoelectric vibrating element at a frequency required for actually vibrating the vibrating unit; detecting a driving voltage and a driving current while the vibrating unit is vibrated; obtaining a current component not relating to the vibration of the vibrating unit from the detected voltages, currents, and the phase difference; computing a current component relating to the vibration of the vibrating unit from the current component not relating to the vibration; and controlling the current component relating to the vibration so as to be a constant value or a desired value.
REFERENCES:
patent: 4677353 (1987-06-01), Shieh
patent: 4868445 (1989-09-01), Wand
patent: 4879528 (1989-11-01), Gotanda
patent: 4882525 (1989-11-01), De Meulenaer et al.
patent: 4939402 (1990-07-01), Hirayama et al.
patent: 4952834 (1990-08-01), Okada
patent: 5074403 (1991-12-01), Myhre
patent: 5372237 (1994-12-01), Yagi
patent: 5472079 (1995-12-01), Yagi et al.
Patent Abstracts of Japan, vol. 6, No. 93, May 29, 1982, JP57027808A, (Yoshida Kogyo KK) Feb. 15, 1982.
Budd Mark O.
YKK Corporation
LandOfFree
Method and apparatus for controlling piezoelectric vibration does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for controlling piezoelectric vibration, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for controlling piezoelectric vibration will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1684978