Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1996-12-04
1999-02-16
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310317, 310316, 310328, 901 14, H01L 4108
Patent
active
058724176
ABSTRACT:
A multiple degrees of freedom vibration actuator capable of motion around multiple axes. The vibration actuator includes a vibration element having drive force output members, and a relative moving member having a curved surface. The curved surface contacts the drive force output member To generate relative motion of the relative moving member with respect to the vibration element. The vibration element includes a frame shaped elastic member having the drive force output members attached thereto, and having electromechanical converting elements contacting the elastic member. When the electromechanical converting elements are excited by a drive voltage, vibrations are generated in the elastic member to produce a drive force which is transmitted To the relative moving member via the drive force output members. The vibration element can be controlled to generate relative motion in various axis directions by selectively controlling the electromechanical converting elements which are excited by a drive voltage.
REFERENCES:
Development of Spherical Ultrasonic Motor, Tribologist, vol. 40, No. 8, Shigeki Toyama, 1995, p. 627-631 (partial translation).
Development of a Small Actuator with Three Degrees of Rotational Freedom, Driving Control Method and Abilities of a 3-D.O.F. Actuator, Japanese Mechanics Society, Robotics-Mecatronics Conference, NO. 95-17, Kiyoshi IOI, Keisuke SASAE, Yasuo Ohtsuki and Yoshimitsu Kurosaki, 06/2-23/95 (partial translation).
Interview with Messrs. Usami and Miyadani 1995 (partial translation).
Budd Mark O.
Nikon Corporation
Williams Timothy A.
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