PIEZOELECTRIC MOTOR, ROBOT HAND, ROBOT, FINGER ASSIST APPARATUS, ELECTRONIC COMPONENT CONVEYING APPARATUS, ELECTRONIC COMPONENT INSPECTING APPARATUS, LIQUID FEEDING PUMP, PRINTING APPARATUS, ELECTRONIC TIMEPIECE, AND PROJECTION APPARATUS

摘要

A first driving signal is supplied to a first electrode of a vibrating body. A second driving signal is supplied to a second electrode of the vibrating body. A common driving signal is supplied to a common electrode of the vibrating body. A phase of the first driving signal is set changeable with respect to a phase of the common driving signal. A phase of the second driving signal is set changeable with respect to the phase of the common driving signal. Then, it is possible to switch a driving direction of a piezoelectric motor according to which phase of the first driving signal or the second driving signal is varied from the phase of the common driving signal. If the phase is simply changed, a switch is unnecessary. It is possible to reduce a driving circuit in size.

主权项

1. A piezoelectric motor comprising:
a vibrating body including a piezoelectric material; a common electrode arranged on one surface of the vibrating body; a first electrode and a second electrode arranged on a surface different from the surface on which the common electrode is arranged; and a driving-signal supplying section configured to supply a common driving signal to the common electrode, supply a first driving signal to the first electrode, and supply a second driving signal to the second electrode, wherein the driving-signal supplying section is capable of supplying the first driving signal with a phase varied from a phase of the common driving signal and supplying the second driving signal with a phase varied from the phase of the common driving signal.