Single Source Hybrid Drive for Multi-Functional Ultrasonic Motor

Abstract

We previously reported a multi-functional single-stator piezoelectric motor, which can produce translational or rotary motions in a simple structure. In this paper, we will present the theoretical analysis and experimental verification o f the hybrid driving technique fo r this motor. In order to benefit from the resonance operating conditions o f ultrasonic motors and the structural superiority o f inertial type piezoelectric motors, we blend these two drive methods as the new hybrid technique. Translational and rotary motions o f mobile element are produced by inertial drive while the stator is excited with rectangular signals at longitudinal and torsional resonance frequencies, respectively.

Piezoelectric Inertia Motors—A Critical Review of History, Concepts, Design, Applications, and Perspectives

“…Non-resonant inertia motors are unlikely to be competitive in such applications, because they tend to be bulkier and require more piezoelectric material to obtain the same velocity as resonant inertia motors. Recent developments of resonant inertia motors, like the integration of multiple DOF sharing one electrical input [16], small and tuneable designs [269], and strategies for the compensation of temperature-dependence [21,270] are promising. However, robust strategies for handling eigenfrequency shifts and a thorough comparison of the different electrical driving principles for resonant inertia motors are still missing in the reviewed literature.…”

“…This contribution does not aim to provide a general review or classification of piezoelectric motors, as many authors have done so before, e.g., [8]; [9] (pp. [27][28][29][30][31][32][33]; [10]; [11] (p. 32); [12] (p. 414); [13] (p. 5); [14]; [15] (p. 9); [16][17][18]. The proposed classification schemas differ, and none of them comprises all motor variants described in literature.…”