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Single-stator three-degree-of-freedom spherical ultrasonic motor and excitation method thereof

A technology of ultrasonic motor and degree of freedom, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., which can solve the problem of complex overall structure, poor dynamic performance, and less degree of freedom problem, to achieve the effect of high energy density, no electromagnetic interference, and easy miniaturization

Active Publication Date: 2021-08-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a single-stator three-degree-of-freedom spherical ultrasonic motor and its excitation method for the problems of complex overall structure, bulky volume, poor dynamic performance and few degrees of freedom in the prior art in the background technology

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  • Single-stator three-degree-of-freedom spherical ultrasonic motor and excitation method thereof
  • Single-stator three-degree-of-freedom spherical ultrasonic motor and excitation method thereof
  • Single-stator three-degree-of-freedom spherical ultrasonic motor and excitation method thereof

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Embodiment Construction

[0042] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0043] This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.

[0044] like figure 1 , figure 2 As shown, the present invention discloses a single-stator three-degree-of-freedom spherical ultrasonic motor, which includes a casing, an end cover, N ball plungers, a rotor, an output shaft, a stator, and a piezoelectric drive module, where N is greater than or equal to 3 Natural number.

[0045] like image 3 As shown, the casing is a hollow cylinder with an open upper end, and threads are provided on the inner wall at the upper end of the side wa...

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Abstract

The invention discloses a single-stator three-degree-of-freedom spherical ultrasonic motor and an excitation method thereof. The spherical ultrasonic motor comprises a shell, an end cover, N ball plungers, a rotor, an output shaft, a stator and a piezoelectric driving module. The stator comprises an outer ring, an inner ring, a driving ring and M connecting rods. The stator is fixed to the lower end face of the machine shell through the outer ring of the stator. The rotor is spherical, the lower surface of the rotor abuts against the driving ring of the stator, and the upper surface of the rotor abuts against N ball plungers fixed to the lower end face of the end cover. The piezoelectric driving module drives the stator to vibrate so as to enable the rotor to rotate. The single-stator three-degree-of-freedom spherical ultrasonic motor can realize multi-degree-of-freedom rotation motion by means of the rotor, and has the advantages of simple and compact structure, no electromagnetic interference, self-locking in power failure, fast response, flexible adjustment of pre-pressure, high control and positioning precision, easy realization of microminiaturization, wide application field, high energy density and the like.

Description

technical field [0001] The invention relates to the technical field of ultrasonic motors, in particular to a single-stator three-degree-of-freedom spherical ultrasonic motor and an excitation method thereof. Background technique [0002] Ultrasonic motor is a kind of motor developed by using piezoelectric materials. It uses the inverse piezoelectric effect of piezoelectric materials to convert energy (convert electrical energy into mechanical energy). Under the excitation of piezoelectric ceramics, the stator generates a motion trajectory that is conducive to driving the rotor. , and finally through the effective motion transmission through the interface friction between the stator and rotor, so as to obtain power output. Compared with the most widely used electromagnetic motor at present, the ultrasonic motor has the advantages of simple structure, high energy density, no electromagnetic interference, self-locking when power off, fast response, high precision, small size, e...

Claims

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Application Information

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IPC IPC(8): H02N2/10H02N2/12H02N2/14
CPCH02N2/108H02N2/12H02N2/142
Inventor 杨颖潘志泳邱建敏吴维
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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