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Three-degree-of-freedom spherical stator ultrasonic motor stator base and its excitation method

A spherical stator and motor stator technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problem of difficult miniaturization, few driving feet, and insufficient driving capacity and other issues, to achieve the effect of simple and compact structure, easy mass production, and easy miniaturization

Active Publication Date: 2019-06-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems that the existing multi-degree-of-freedom rotary ultrasonic motor has few driving feet, insufficient driving capacity, complex and uncompact structure, and difficulty in miniaturization

Method used

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  • Three-degree-of-freedom spherical stator ultrasonic motor stator base and its excitation method
  • Three-degree-of-freedom spherical stator ultrasonic motor stator base and its excitation method
  • Three-degree-of-freedom spherical stator ultrasonic motor stator base and its excitation method

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specific Embodiment approach 1

[0019] Specific implementation mode one: refer to Figure 1 to Figure 3 Describe this embodiment in detail, the three-degree-of-freedom spherical stator ultrasonic motor stator base described in this embodiment includes a piezoelectric ceramic spherical shell 1 and eight driving feet 2,

[0020] A pair of electrode partitions 5 in the direction of the x-axis, a pair of electrode partitions 6 in the direction of the y-axis, and a pair of z-axis direction of electrode partition 7,

[0021] The blank area between all the electrode partitions is the non-electrode area 4,

[0022] The polarization direction of each pair of electrode partitions is the same, and all electrode partitions are polarized along the thickness direction of the ball diameter,

[0023] The eight driving feet 2 are evenly arranged on the non-electrode area 4, and the spatial phase differences between the eight driving feet 2 and the electrode partition 5 in the x-axis direction, the electrode partition 6 in ...

specific Embodiment approach 2

[0026] Embodiment 2: The excitation method of the stator base of the three-degree-of-freedom spherical stator ultrasonic motor described in this embodiment is based on the three-degree-of-freedom spherical stator stator base of the ultrasonic motor described in Embodiment 1. The excitation method can Excite the three-degree-of-freedom spherical stator ultrasonic motor stator base to realize three-degree-of-freedom movement, and the three degrees of freedom include elliptical rotation around the x, y and z axes;

[0027] The excitation method of the three-degree-of-freedom spherical stator ultrasonic motor stator base driving the motor rotor to rotate around the x-axis:

[0028] A phase excitation voltage is applied to the electrode partition 6 in the y-axis direction and the electrode partition 7 in the z-axis direction, so that the piezoelectric ceramic spherical shell 1 produces a yaw-like vibration mode along the y-axis and z-axis directions, so that along the y-axis and z-a...

specific Embodiment approach 3

[0038] Specific implementation mode three: refer to Figure 4 Describe this embodiment in detail. This embodiment is to further explain the excitation method of the stator base of the three-degree-of-freedom spherical stator ultrasonic motor described in the second embodiment. In this embodiment, the electrode partitions 6 and z in the y-axis direction The excitation voltage with an amplitude of 60V is applied to the electrode partitions 7 in the axial direction, and the positive and negative poles of the anti-phase voltage with a phase amplitude of 60V are respectively connected to a pair of electrode partitions 6 in the y-axis direction, and the opposite phase voltage with an amplitude of 60V is respectively connected to a pair of electrode partitions 6 in the y-axis direction. The positive and negative poles of the phase voltage are respectively connected to a pair of electrode partitions 7 in the z-axis direction.

[0039] In this embodiment, if Figure 4 As shown, the po...

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Abstract

The invention relates to a three-degree-of-freedom spherical stator base body of an ultrasonic motor and an excitation method of the stator base body and belongs to the piezoelectric ultrasonic motortechnical field. The present invention aims to solve the problems of few driving feet, insufficient driving capability, complicated structure, large size and difficulty in achieving miniaturization ofan existing multi-degree-of-freedom rotation type ultrasonic motor. A pair of x-axis electrode sub-region, a pair of y-axis electrode sub-region and a pair of z-axis electrode sub-region are symmetrically distributed along the x-axis direction, y-axis direction, and z-axis direction of the surface of a piezoelectric ceramic spherical shell respectively; a blank area among all the electrode sub-regions is a non-electrode area; the polarization directions of each pair of electrode sub-regions are the same; the electrode sub-regions are polarized along the radial thickness of the spherical shell; eight driving feet are uniformly arranged on the non-electrode area; spatial distance difference between the eight driving feet and all the electrode sub-regions is 45 degrees; and a spatial phase angle between the axis of each driving foot and an xoy plane is 45 degrees. The three-degree-of-freedom spherical stator base body is used for making a multi-degree-of-freedom ultrasonic motor.

Description

technical field [0001] The invention relates to a stator matrix of a three-degree-of-freedom spherical stator ultrasonic motor and an excitation method thereof, belonging to the technical field of piezoelectric ultrasonic motors. Background technique [0002] Piezoelectric ultrasonic motor is a kind of piezoelectric ultrasonic motor that uses the inverse piezoelectric effect of piezoelectric ceramics to excite vibration in the ultrasonic frequency range in the elastic body, and forms a particle motion with a specific trajectory at a specific point or area on the surface of the elastic body, and then passes through the stator, The frictional coupling between the rotors converts the microscopic motion of the particle into the macroscopic motion of the rotor, which has the advantages of low speed and high torque, no need for a speed change mechanism, no electromagnetic interference, fast response, and self-locking when power is off. [0003] However, the traditional multi-degre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/10H02N2/12H02N2/14
CPCH02N2/108H02N2/12H02N2/14
Inventor 石胜君黄郅博张云赫刘英想陈维山刘军考
Owner HARBIN INST OF TECH
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