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Cross combined excitation mode stator and micro-ultrasonic electric machine with the same stator

An excitation method and cross-combination technology, applied in the field of ultrasonic vibration excitation stator and micro-ultrasonic motor, can solve the problems of small output torque and low work efficiency, improve no-load speed, improve work efficiency, promote practical and micro the effect of

Inactive Publication Date: 2009-12-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of low working efficiency and small output torque of existing micro-ultrasonic motors, the present invention provides a stator with cross-combined excitation mode and a micro-ultrasonic motor using the stator

Method used

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  • Cross combined excitation mode stator and micro-ultrasonic electric machine with the same stator
  • Cross combined excitation mode stator and micro-ultrasonic electric machine with the same stator
  • Cross combined excitation mode stator and micro-ultrasonic electric machine with the same stator

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specific Embodiment approach 1

[0006] Specific implementation mode one: see Figure 3 to Figure 5 , the stator of the cross-combined excitation method provided in this specific embodiment is composed of a piezoelectric ceramic element and a stator matching block, and the outer surface of the piezoelectric ceramic element is evenly distributed with eight radial polarization for exciting vibration. external electrode.

[0007] The piezoelectric ceramic element is a piezoelectric ceramic tube, a piezoelectric ceramic column, a piezoelectric column with a conductive shaft (a metal column with a piezoelectric ceramic sheet with electrodes attached to its outer surface) or a piezoelectric tube with a conductive tube (outside A metal tube with piezoceramic sheets with electrodes attached to its surface). When the piezoelectric ceramic element is a piezoelectric ceramic tube, the polarization direction is from the outer surface of the piezoelectric ceramic tube to the inner surface of the piezoelectric ceramic tub...

specific Embodiment approach 2

[0008] Specific implementation mode two: see image 3 with Figure 4 The present embodiment adopts the following methods to obtain the piezoelectric ceramic element with eight external electrodes: 1. Select the piezoelectric ceramic tube 3 (from the Beijing Institute of Acoustics, Chinese Academy of Sciences) that has been plated with a layer of silver film on the inner and outer surfaces after the polarization. Purchase), it adopts the radial polarization mode from the outer surface to the inner surface; 2. Divide the silver film on the surface of the above-mentioned piezoelectric ceramic tube 3 into eight parts evenly with tape strips, and then divide the inside and outside of the above-mentioned piezoelectric ceramic tube 3 The surface is all coated with anti-corrosion paint and dried, and the anti-corrosion paint is insoluble in nitric acid, such as DY-ZB-288 protective paint; 3. Tear off the tape strips on the outer surface of the piezoelectric ceramic tube 3 and put the ...

specific Embodiment approach 3

[0009] Specific implementation mode three: see Figure 5 , in this specific embodiment, the piezoelectric ceramic element with eight external electrodes is composed of a flange 11, a first piezoelectric tube 3-1 and a second piezoelectric tube 3-2, the first piezoelectric tube The outer surfaces of the electric tube 3-1 and the second piezoelectric tube 3-2 are evenly distributed with four external electrodes with the same polarization direction for exciting vibration, and the flange 11 is fixedly connected to the first piezoelectric tube 3-2. 1 and the second piezoelectric tube 3-2 and the central axes of the first piezoelectric tube 3-1 and the second piezoelectric tube 3-2 coincide, the positions of the four outer electrodes of the first piezoelectric tube 3-1 The positions of the four external electrodes of the second piezoelectric tube 3-2 are respectively set in one-to-one correspondence. When this specific embodiment is adopted, the first piezoelectric tube 3-1 and the...

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Abstract

The stator of the cross-combined excitation mode and the micro-ultrasonic motor using the stator belong to the field of ultrasonic vibration application, and are intended to overcome the problems of low working efficiency and small output torque of the existing micro-ultrasonic motor. The stator of the cross combined excitation method of the present invention is composed of a piezoelectric ceramic element and a stator matching block, and the outer surface of the piezoelectric ceramic element is evenly distributed with eight radially polarized external electrodes for exciting vibration; the present invention The invented micro-ultrasonic motor is a bending-vibration-mode micro-ultrasonic motor using piezoelectric ceramic elements with eight external electrodes as a stator. The invention significantly improves the working efficiency of the motor, improves the mechanical characteristics of the motor, and promotes the practicality and miniaturization of the bending vibration ultrasonic motor. Compared with the traditional ultrasonic motor with four outer electrode stators, the performance of the micro-ultrasonic motor of the present invention is significantly improved, the no-load speed is increased by about 23%, and the locked-rotor torque is increased by about 45%.

Description

technical field [0001] The invention belongs to the field of ultrasonic vibration applications, and in particular relates to an ultrasonic vibration excitation stator using a bending vibration mode and a new partition excitation mode and a micro-ultrasonic motor using the stator. Background technique [0002] The bending vibration mode ultrasonic motor is a kind of ultrasonic motor, and its structure is simpler than other ultrasonic motors. According to the shape of the stator, the bending vibration mode ultrasonic motor can be divided into piezoelectric sheet sandwich ultrasonic motor, piezoelectric column ultrasonic motor and piezoelectric tube ultrasonic motor, among which the working efficiency of the ultrasonic motor is a sign of whether it can be practical an important parameter to measure. The main factors affecting the efficiency of this type of motor are: the design structure of the motor and the partition excitation method of the stator. Such as figure 1 As show...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00
Inventor 曲建俊程廷海张巍宋宝玉
Owner HARBIN INST OF TECH
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