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A two-degree-of-freedom ultrasonic motor and its driving method

A technology of ultrasonic motor and degree of freedom, which is applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc. It can solve the problems affecting the stability of ultrasonic motor and improve the output torque , large contact area, convenient reversing control effect

Active Publication Date: 2020-04-10
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inherent helical structure of the helical stator makes it generate axial driving force while driving the rotor to rotate, that is, the rotational motion and axial motion of the helical stator ultrasonic motor coexist, whether it is used to construct a rotary motor or a linear motor , the coexisting driving force needs to be eliminated by an additional mechanism for the motor, which also affects the stability of the operation of the ultrasonic motor

Method used

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  • A two-degree-of-freedom ultrasonic motor and its driving method
  • A two-degree-of-freedom ultrasonic motor and its driving method
  • A two-degree-of-freedom ultrasonic motor and its driving method

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Embodiment Construction

[0024] An ultrasonic motor with linear and two degrees of freedom of rotation: the stator is composed of two helical structures; the rotor is a tubular structure with an outer diameter slightly smaller than the inner diameter of the stator helix; the rotor passes through the interior of the two helixes; two helical stators, one left-handed , a right-handed, symmetrical parameters, coaxial installation; the material of the spiral stator is metal, and the section is rectangular, square or circular.

[0025] The driving method of the two-degree-of-freedom ultrasonic motor is:

[0026] One end of the helical structure stator is connected to the ultrasonic vibrator, and the other end is connected to the vibration absorber or an excitation signal with a certain phase relationship with the vibrator is applied to excite the stator to generate traveling waves along the helix; the two helical stators are driven independently; the two helical The specifications and parameters of the driv...

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Abstract

The invention relates to a linear rotating ultrasonic motor with two degrees of freedom, and a drive method therefor. The ultrasonic motor body employs two independent spiral structure rotors: one left-handed stator and one right-handed stator. When the coils of the two spiral structure stators are driven according to different method, the linear or rotating motion can be generated, thereby forming the motor with two degrees of freedom. The specific drive method comprises the steps that the two stators perform the in-phase excitation to make linear motion, and perform the inverted-phase excitation to make rotating motion. The two stators of the motor can effectively decompose the acting force of a spiral structure to a rotor, and the linear and rotating operation of the ultrasonic motor can be achieved through the control of the two spiral excitation modes.

Description

Technical field: [0001] The invention relates to a double-stator two-degree-of-freedom ultrasonic motor and a driving method thereof, belonging to the technical field of special motors. Background technique: [0002] Ultrasonic motor is a new type of motor that uses the inverse piezoelectric effect of piezoelectric ceramic materials to convert the vibration energy in the ultrasonic frequency range of the piezoelectric vibrator into mechanical energy and relies on friction to drive the rotor. It has a simple and compact structure, no electromagnetic interference, With the characteristics of low speed, high torque, and high resolution, it shows broad application prospects in the fields of micro robots, micro aircraft, and micro medical devices. [0003] The helical stator ultrasonic micromotor is a kind of traveling wave ultrasonic motor. As the most representative and most widely used type of ultrasonic motor, the traveling wave ultrasonic motor has experienced decades of de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00
CPCH02N2/0005
Inventor 马继杰张宁尧温建明黄盛龙诸贤诚
Owner ZHEJIANG NORMAL UNIVERSITY
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