Linear motor

Details Linear motor Linear motor

1988-06-03

1989-08-15

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310323, 310328, 310317, 310 12, H01L 4108

Patent

active

048577910

ABSTRACT:
A linear motor is arranged to have two legs each of which have a different resonance frequency, when one of the legs is induced to resonate by applying a vibration having a frequency which corresponds to the resonance frequency of one of the legs, to the chassis of the motor, the motor proceeds in a first direction, while when a vibration having a second frequency which corresponds to the resonance frequency of the other leg is applied, the motor is propelled linearly in the other direction.

REFERENCES:
patent: 4453103 (1984-06-01), Vishnevsky et al.
patent: 4714855 (1987-12-01), Fujimoto
patent: 4742260 (1988-05-01), Shimizu et al.
Sonic Power Sounds Off, by McMaster, Reprint from Steel, Jun. 26, 1967, (7 pages).
Kuribayashi et al., "Excitation Conditions of Flexural Traveling Waves for a Reversible Ultrasonic Linear Motor", J. Acoust. Soc. Am. 77(4), Apr. 1985, pp. 1431-1435.
Kumada, "A Piezoelectric Ultrasonic Motor," Journal of Applied Physics, vol. 24, (1985), Supplement 24-2, pp. 739-471.
Iwamatsu et al., "Rotary Ultrasonic Motor Using Extensional Vibration of a Ring," Journal of Applied Physics, vol. 25, (1986), Supplement 25-1, pp. 174-176.
Hatsuzawa et al., "Speed Control Characteristics and Digital Servosystem of a Circular Traveling Wave Motor," Rev. Sci. Instrum. 57(11), Nov. 1986, pp. 2886-2889.

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