Linear motion stepping ultrasonic motor

A linear motion, ultrasonic motor technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve problems such as difficult implementation and complex system

Inactive Publication Date: 2006-05-24
JIANGSU FENGKE ULTRASONIC MOTORS TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The self-calibrating ultrasonic motor adopts the principle of self-calibrating positioning driven by standing waves. The rotor must run to the stator self-calibrating area in each step to ensure no step loss or multiple steps. It is difficult to realize the open loop in a complete sense.
The method of controlling the driving power of the ultrasonic motor to realize stepping must add a feedback link to eliminate the cumulative error, and the system is more complicated

Method used

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  • Linear motion stepping ultrasonic motor
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Embodiment Construction

[0012] A linear motion stepping ultrasonic motor such as figure 1 shown. Its characteristics: the stator 1 is composed of metal elastic body 3 with two angular vibrators, and the root of the two arms of each angular vibrator is attached with piezoelectric ceramics 2, which are used to excite the vibrator arms to generate longitudinal vibration. The mover 4 is composed of a bar-shaped body with evenly graduated tooth grooves on the lower end surface; the surface of the bar-shaped mover with tooth grooves is pressed on the stator drive head; the longitudinal vibration of the vibrating arm of the stator angular vibrator is excited by piezoelectric ceramics. The joint effect of the longitudinal vibration with phase difference of the two vibrating arms can make the drive head produce elliptical motion to push the mover to move in a straight line to form a linear ultrasonic motor; the vibrating arms of the two angular vibrators work alternately in the same direction to drive the mov...

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Abstract

The motor includes stator, mover and stator frame. The stator is composed of metal elastomer with two angular vibrator. Piezoelectric ceramics are pasted on root part of two arms of each angular vibrator. The mover is composed of a bar shaped body with even graduated gullets on its low-end face. The face with gullets of bar shaped mover is pressed on the driving head of the stator. Combined action of longitudinal vibration of two vibrating arms with Pi / 2 phase difference in same vibrator makes driving head generate elliptic motion (or circular motion) to drive linear movement of the mover continuously so as to form linear ultrasonic motor. Two vibrating arms in two angular vibrators in same direction are operated alternately to drive stepping movement of the mover so as to form linear stepping ultrasonic motor. Features are: open loop control, simple drive circuit, no cumulative error, corotating / contrarotating stepping movement and continuous linear movement.

Description

1. Technical field: [0001] The linear motion stepping ultrasonic motor of the invention belongs to the field of ultrasonic motors. 2. Background technology: [0002] Ultrasonic motor is a new type of power output device that utilizes the inverse piezoelectric effect of piezoelectric ceramics and ultrasonic vibration. Among them, the linear motion stepping ultrasonic motor is a kind of stepping ultrasonic motor. In addition to the general characteristics of ultrasonic motors, the motor adopts open-loop control without cumulative error, and can realize forward and reverse stepping or continuous linear motion. It is excited by two sinusoidal signals with the same frequency and phase difference, and the drive circuit is simple. . At present, the open-loop control stepping ultrasonic motor adopts the mechanism of modal rotation or self-correction, and the mode conversion stepping ultrasonic motor uses the phenomenon that the small particles on the vibrating body move to the pit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/02H02N2/04
Inventor 赵淳生金家楣
Owner JIANGSU FENGKE ULTRASONIC MOTORS TECH
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