An ultrasonic motor with multi-stator planar array structure

An ultrasonic motor, planar array technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc. The effect of improving friction driving ability, high electromechanical conversion efficiency, and increasing contact area

Inactive Publication Date: 2018-08-24
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the above technical problems, the present invention discloses an ultrasonic motor with a multi-stator planar array structure, which is easy to weld and manufacture multiple motor stators on the same stator plate, and form multiple motor array drives to meet the application requirements of specific occasions; solve the existing The ultrasonic motor has a single structure and is not easy to expand

Method used

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  • An ultrasonic motor with multi-stator planar array structure
  • An ultrasonic motor with multi-stator planar array structure
  • An ultrasonic motor with multi-stator planar array structure

Examples

Experimental program
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Effect test

Embodiment 1

[0053] like Figure 1~Figure 4 As shown, an ultrasonic motor with a multi-stator planar array structure includes a stator 1, a rotor 2 and an output shaft 3. The ultrasonic motor with a multi-stator planar array structure includes a stator plate 10, and the stator plate 10 is provided with at least Two stators 1, each corresponding to two rotors 2; the stator 1 includes a hollow stator ring 12 and a piezoelectric ceramic module, the stator ring 12 is provided with annularly distributed welding pads, and the piezoelectric ceramic module Including N piezoelectric ceramic elements 13, the piezoelectric ceramic elements 13 are welded and fixed on the pads of the stator ring 12, wherein, N is a multiple of 8; between the stator ring 12 and the stator plate 10, a stator The ring 12 vibrates in the gap 14, and the stator ring 12 is connected with the stator plate 10 through a support connecting hinge 15; the stator plate 10 is also provided with driving electrodes, and the electrodes...

Embodiment 2

[0063] On the basis of Embodiment 1, this embodiment is different from Embodiment 1 in that it adopts a four-phase driving method, and the arrangement rule and signal connection mode of the piezoelectric ceramic elements 13 on the stator ring 12 on the pads are different from Embodiment 1. Specifically:

[0064] like Image 6As shown, the piezoelectric ceramic element 13 and the electrodes include 4 groups of standing wave drive units, which are respectively unit a, unit b, unit c and unit d, and each unit includes two piezoelectric ceramic elements on the front side of the stator ring 12 13 and two piezoelectric ceramic elements 13 on the opposite side of the stator ring 12, the piezoelectric ceramic elements 13 are arranged in sequence according to unit a, unit b, unit c, and unit d, and are arranged circularly on the front and back sides of the stator ring 12;

[0065] In the unit a, unit b, unit c, and unit d, the polarized positive poles 131 of the two piezoelectric cera...

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Abstract

The invention provides an ultrasonic motor of a multi-stator planar array structure. The ultrasonic motor comprises stators, rotors, output shafts and a stator plate, wherein at least two stators are arranged on the stator plate, each stator comprises a hollow stator ring and a piezoelectric ceramic module, an annularly distributed bonding pad is arranged on each stator ring, each piezoelectric ceramic module comprises N piezoelectric ceramic elements, and the piezoelectric ceramic elements are fixed on the bonding pad of the corresponding stator ring in a welded manner; a gap for the corresponding stator ring to vibrate is formed between the stator plate and the corresponding stator ring, and the stator rings are connected with the stator plate through connecting pieces; driving electrodes are arranged on the stator plate, and the electrodes, with same signals, of the piezoelectric ceramic elements are electrically connected with the corresponding driving electrodes; the rotors are in contact with the surfaces of the piezoelectric ceramic modules, and the stators drive the rotors to rotate so as to form power output. Through the technical scheme of the invention, the driving for a plurality of motor arrays is easy to form, the operating life of the motor is longer, the reliability of the motor is higher, the energy efficiency utilization rate is high, and the electromechanical conversion efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to an ultrasonic motor with a multi-stator planar array structure. Background technique [0002] The ultrasonic motor is a non-electromagnetic motor that uses the inverse piezoelectric effect of piezoelectric ceramics to excite the stator to vibrate in the ultrasonic frequency domain, and converts the vibration into the motion output of the rotor to drive the load through the friction between the stator and the rotor. Compared with electromagnetic motors, it has the characteristics and advantages of small size, light weight, compact structure, fast response, low noise, no electromagnetic interference, high torque density, high torque at low speed, and direct drive. At present, it has been used in many fields such as micro-robots, automobiles, aerospace, precision locators, optical instruments, etc., and has broad application prospects. Traveling wave rotary ultrasonic motor is curre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/02H02N2/04H02N2/06
CPCH02N2/02H02N2/046H02N2/06
Inventor 彭太江伍晓宇梁雄罗峰石鸿雁徐斌
Owner SHENZHEN UNIV
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