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Standing-wave type ultrasonic motor of two driving frequency

An ultrasonic motor and frequency technology, applied in the field of electric motors, can solve the problem that the accuracy of rotor motion needs to be further improved, and achieve the effects of improving driving and control capabilities, reducing radial runout, and improving motion accuracy.

Inactive Publication Date: 2015-02-25
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the motor only works at a fixed frequency, and the precision of the rotor motion needs to be further improved

Method used

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  • Standing-wave type ultrasonic motor of two driving frequency
  • Standing-wave type ultrasonic motor of two driving frequency
  • Standing-wave type ultrasonic motor of two driving frequency

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Embodiment Construction

[0031] Such as figure 1 As shown, the present invention includes a base 2 , a pre-tightening case 4 , a stator 5 , a piezoelectric ceramic sheet 3 , a rotor 6 , a thrust bearing 9 and a disc spring 8 .

[0032] The base 2 is a disk-shaped body with a central axis hole. On the top surface of the base 2 disk-shaped body, a central convex edge surrounding the central axis hole and an outer ring for connecting the pre-tightening shell 4 are provided. On the base 2 disk The bottom surface of the shape body is provided with a central ring, and a bearing 7 is housed in the base 2 central ring, and this bearing 7 is generally a radial bearing.

[0033] The pre-tightening shell 4 is a hollow cylindrical cover structure, and the center of the inner top surface is provided with a central ring, and a bearing 7 is also installed in the central ring; the pre-tightening shell 4 is buckled on the base 2, and is connected with the The outer ring on the 2 is connected by thread. The pre-tight...

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Abstract

The invention provides a standing-wave type ultrasonic motor of two driving frequency, which comprises a base, a preloaded shell, a stator, a piezoelectric ceramic piece, a rotor, a thrust bearing and a disc spring. The stator is arranged on the base; a shifting gear used for shifting the rotor is disposed on the upper surface of the stator; the rotor passes through a central axial hole of the stator and matches with the inner side of the shifting gear of the stator; an upper and lower shaft of the rotor are respectively connected with the preloaded shell and the base; the thrust bearing and the disc spring are disposed on the upper share of the rotor; the piezoelectric ceramic piece of a circular ring sheet structure is adhered at the lower surface of the stator; a polarization partition disposed on the piezoelectric ceramic piece is capable of respectively stimulating the stator to produce two different bending vibration modes under the driving of input voltage with two different frequency. Driving frequency of the ultrasonic motor is changed to allow the motor to externally output two different torques and speeds, and thus, using range of the motor is enlarged, driving and control ability of micro electromechanical products are improved.

Description

technical field [0001] The invention relates to a motor in the field of ultrasonic application, in particular to a two-frequency driving standing wave ultrasonic motor. Background technique [0002] Ultrasonic motor (referred to as ultrasonic motor) is a new type of motor, and its working principle is different from that of traditional electromagnetic motors. The ultrasonic motor uses the inverse piezoelectric effect of the piezoelectric ceramic sheet to excite the high-frequency ultrasonic vibration of the stator, and then the high-frequency ultrasonic vibration of the stator drives the rotor in contact with it to rotate. Ultrasonic motors have the advantages of no magnetic interference, fast response, etc., and have good application prospects in the field of drive and control of micro-miniature electromechanical systems. The development of modern miniature electromechanical systems requires that the motors be miniaturized and at the same time be able to provide different ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/12H02N2/14
Inventor 郭辉张军伟李小亭
Owner HEBEI UNIVERSITY
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