A Novel Linear Piezoelectric Motor With Complex Vibration Modes

Abstract

This work describes a new type of piezoelectric motor that can be employed for both linear and rotary displacements. Although inspired on a classical "V-type" configuration, its long and thin stator tip can oscillate with relatively high amplitude and in several mode combinations. Two piezostacks are used to vibrate the stator accordingly. Movement in both directions can be achieved by driving each stack independently. The driving circuit is based on half-bridge inverter circuit. Parameters affecting speed control, as well as unbalance due to fabrication inaccuracy are analyzed.

Dynamics modeling and control of a V-shaped ultrasonic motor with two Langevin-type transducers

“…The speed, thrust, and resolution of the miniaturized VSM are comparable with those of the original VSM. Ibrahim [9] has proposed a V-type configuration with a long and thin stator tip that can oscillate with a relatively high amplitude and in several mode combinations. Jeong [10] has proposed a bonded structured V-type ultrasonic rotary motor for small precision machines.…”

Analytical modeling and experimental validation of a V-shape piezoelectric ultrasonic transducer

“…Two piezoelectric transducers are connected together through a coupling point, forming a V-shape piezoelectric composite structure. As its unique structure, the V-shape piezoelectric transducer has been widely applied to the piezoelectric actuator (ultrasonic motor) [1][2][3][4], ultrasonic aided processing [5,6], sensor [7], and energy harvesting device [8][9][10]. For example, the V-shape ultrasonic motor with advantages such as high efficiency, simple structure, and high weight-to-thrust ratio, has been applied to aerospace and precision positioning applications.…”

“…An equivalent circuit may be understood as the modeling of mechanic systems based on the electric network theory [12]. Kurosawa [1], Jeong [2] and Ibrahim [3] designed the V-shape piezoelectric transducers for generating elliptical motion for converting high frequency vibration to macro movement by using the finite element method. The prime advantage of the finite element method is that the design and analysis of a complex structure is possible without the structural limitations of the transducer [13][14][15][16].…”

A Bidirectional Standing Wave Ultrasonic Linear Motor Based on Langevin Bending Transducer

“…The motor itself doesn't emit electromagnetic interference and be suitable for applications which are sensitive to electromagnetic field, such as precision stage of e-beam x-ray mask writer [3,4]. Generally, USLM can be classified into bending standing wave type [5,6], traveling wave type [7], transducer type [8][9][10] and surface acoustic wave type [11]. Among them the bending standing wave USLM exhibits such features as: simple mechanical structure, high positioning accuracy, only one phase driven signal and possess an important position in USLM.…”