Supply circuit for a traveling-wave piezo-electric motor

Details Supply circuit for a traveling-wave piezo-electric motor Supply circuit for a traveling-wave piezo-electric motor

1999-02-16

2000-06-06

Ponomarenko, Nicholas

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

318116, H01L 4104

Patent

active

060722657

ABSTRACT:
Supply circuit for a piezo-electric motor comprising a rotor driven, by friction, by a stator energized by at least two piezo-electric elements (P1, P2) supplied respectively with two alternating voltages (Vp, Va) of like amplitude and phase-shifted by approximately 90.degree. by means of a single source and of a means intended for generating the two phase-shifted voltages. This means consists of a capacitor (C), in series with one of the piezo-electric elements (P2), whose value is chosen so that for a given frequency of the voltage of the source (S), substantially the same voltages and a phase-shift of 90.degree. is obtained. The voltage of the source is advantageously controlled, in frequency, by a processing logic unit (PLU).

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French preliminary Search Report in SN 9802070--France.

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