Standing wave frequency change step ultrasonic electric machine

An ultrasonic motor and stepping technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problems such as difficult to increase torque and increase sliding friction

Inactive Publication Date: 2005-10-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, the open-loop control stepping ultrasonic motor adopts the modal rotation or self-correcting mechanism, and its driving force is provided by the tangential component of the positive pressure between the stator and the rotor. The rotor and the stator are in sliding friction contact, and the positive pressure is increased by increasing the pre-pressure It can increase the driving force, but at the same time increase the sliding friction between the stator and the rotor, so it is difficult to increase the torque

Method used

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  • Standing wave frequency change step ultrasonic electric machine
  • Standing wave frequency change step ultrasonic electric machine
  • Standing wave frequency change step ultrasonic electric machine

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Embodiment Construction

[0012] Standing wave frequency conversion stepping ultrasonic motor such as figure 1. shown. Its characteristics: the stator 2 is composed of an elastic body with convex teeth on the upper end surface and uniformly partitioned axially polarized piezoelectric ceramic rings 3 on the lower end surface; the annular rotor 1 with evenly graduated tooth grooves on the lower end surface is pressed on the stator 2 on the convex teeth; the piezoelectric ceramic ring excites the bending vibration of the stator elastic body, and the oblique movement of several stator convex teeth acts on the rotor tooth surface to generate circumferential thrust and drive the rotor to move; when the rotor turns over the rotor teeth When half the tooth pitch of the stator, the driving teeth corresponding to this vibration mode of the stator are respectively located at the slots of the rotor, the rotor cannot be driven, and the first step of the rotor motion ends; when the power is switched to excite the st...

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Abstract

A stationary wave frequency conversion step-by-step supersonic motor is composed of three parts: a stator, a rotor and a piezoelectric ceramics, among which, the top face of the stator has double wedges, the bottom face is adhered with a piezoelectric ceramic ring, the bottom face of the rotor has uniform dividing grooves, the end face of the ring rotor with grooves presses on the double wedges of the stator top face. The piezoelectric ceramic ring excites the stator to crease and vibrate, several stator double wedges move obliquely on the rotor to drive the rotor, when it rotates over half of the teeth space, the driving tooth of the stator corresponding to it is placed at the groove of the rotor, which can't be driven, its first step space is finished. The switch supply excites another vibration type of the stator that the corresponding driving tooth is in the middle of the groove of the rotor to drive it for the second step movement, the motor works like this continuously to realize progress.

Description

Technical field: [0001] The standing wave frequency conversion stepping ultrasonic motor of the invention belongs to the field of ultrasonic motors. Background technique: [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 standing wave frequency conversion 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, has no cumulative error, can realize forward and reverse stepping, is excited by two phase-independent sinusoidal signals, and has a simple driving circuit. At present, the open-loop control stepping ultrasonic motor adopts the modal rotation or self-correcting mechanism, and its driving force is provided by the tangential component of the positive pressure between the stator and the rotor. The rotor and the stator are in sliding fri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/00
Inventor 赵淳生金家楣
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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