Ultrasonic actuator

Details Ultrasonic actuator Ultrasonic actuator

2009-05-20

2010-06-15

Benson, Walter (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S316010, C310S316020

Reexamination Certificate

active

07737604

ABSTRACT:
An ultrasonic actuator includes: an actuator body (5) including an actuator body (50); a control circuit (150) for setting a driving frequency; power supply sources (191, 192) for applying a driving voltage having the driving frequency to the actuator body; and a memory (170) for storing data related to a difference between antiresonance and resonance frequencies of the actuator body (50). The control circuit (150) determines, based on a reference frequency where a current value of a current fed to the piezoelectric element (50) is local minimum and the data stored in the memory (170), a lower limit of a control range of the driving frequency so that the lower limit is equal to or higher than a frequency where the current value of the current fed to the piezoelectric element (50) is local maximum and determines the driving frequency to be a frequency in the control range.

REFERENCES:
patent: 4853579 (1989-08-01), Kawasaki et al.
patent: 5376855 (1994-12-01), Suganuma
patent: 5477099 (1995-12-01), Suganuma
patent: 5479063 (1995-12-01), Suganuma
patent: 5767609 (1998-06-01), Suganuma
patent: 5821667 (1998-10-01), Takagi et al.
patent: 6252332 (2001-06-01), Takagi et al.
patent: 6586860 (2003-07-01), Iino et al.
patent: 2002/0049427 (2002-04-01), Wiener et al.
patent: 2002/0057040 (2002-05-01), Shibatani
patent: 2005/0116583 (2005-06-01), Nishio et al.
patent: 2005/0225202 (2005-10-01), Vogeley et al.
patent: 63-056177 (1988-03-01), None
patent: 03-022871 (1991-01-01), None
patent: 03-239168 (1991-10-01), None
patent: 06-315283 (1994-11-01), None
patent: 07-264882 (1995-10-01), None
patent: 2002-359983 (2002-12-01), None
patent: 2004-304963 (2004-10-01), None
patent: 2005-185085 (2005-07-01), None
patent: 2006-115583 (2006-04-01), None
patent: 2006-304490 (2006-11-01), None
International Search Report and Written Opinion for corresponding Application No. PCT/JP2008/000608 mailed Jun. 17, 2008.
Form PCT/ISA/237.

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