Patent ID: 7148605
Filing Date: 2006-12-12
Classification: H02N

Abstract:
1. A biaxial piezoelectric motor comprising: a contact element, the contact element to include at least one point to contact an object to be moved; a first piezoelectric driver coupled to one side of the contact element, when energized, the first piezoelectric driver to move the object in a first direction approximately tangential to the surface of the contact element at the at least one point of contact; and, a second piezoelectric driver coupled to a second side of the contact element, the piezoelectric to move the object in a second direction approximately tangential to the surface of the contact element at the at least one point of contact, the first direction and the second direction to form an angle other than 180 degrees to enable movement of the object in a two dimensional plane drive circuitry coupled to the first piezoelectric driver and the second piezoelectric driver, the drive circuitry to determine a desired direction and amplitude of motion for the object wherein the amplitude of motion for the object is controlled by adjusting the frequency of the first piezoelectric with respect to the frequency of the second piezoelectric, a higher frequency representing an increase in amplitude of motion for the object, the drive circuitry including a processor that computes the voltage amplitude applied to the first piezoelectric and the voltage amplitude applied to the second piezoelectric to move the object in the desired direction.