Patent ID: 6242850
Filing Date: 2001-06-05
Classification: H02N

Abstract:
A piezoelectric motor comprising:a rotor of a cylindrical shape, said rotor having a natural elastic compression limit;a first actuator having a first piezoelectric vibrator, said first actuator positioned in linear contact with and urged against said rotor by a first urging means, said first vibrator including electrodes having first outgoing leads,a second actuator having a second piezoelectric vibrator, said second actuator positioned in linear contact with and urged against said rotor by a second urging means, said second vibrator including electrodes having second outgoing leads, andan electronic control unit, said control unit being connected to said first and second outgoing leads, said control unit causing periodic oscillations of said first and second vibrators,whereby periodic oscillations of said first and second piezoelectric vibrators causing compressions of said rotor and its rotation in a predetermined direction, said compressions not exceeding said natural elastic compression limit of said rotor, and cessation of said compressions causing said rotor to fully restore its initial cylindrical shape.