Traveling-wave piezoelectric motor

Details Traveling-wave piezoelectric motor Traveling-wave piezoelectric motor

1998-12-17

2000-07-25

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

31032306, 31032303, H01L 4108

Patent

active

06093994&

ABSTRACT:
A traveling wave piezoelectric motor having essentially a stator (1) in the form of an annular plate PLANE, the stator connected to two groups of cylindrical polarized ceramic piezoelectric elements (2, 3, 4) and excited by an alternating current with a phase shift of 90 degrees between the groups so as to generate a deformation in the form of a traveling wave at the surface of the stator, and of a rotor in the form of a disk. The piezoelectric elements are connected to the stator by the intermediary of an auxiliary coupling piece (5, 6, 7) in the form of a truncated segment and in permanent contact with the stator by their small-section extremity.

REFERENCES:
patent: 5719462 (1998-02-01), Takagi
patent: 5726519 (1998-03-01), Gonnard et al.

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