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Single-mode driven dual-driving-feet n-shaped linear ultrasonic motor and control method thereof

A linear ultrasonic motor, dual-drive technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc. Operating frequency bandwidth, high space utilization, compact structure

Active Publication Date: 2018-08-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It will cause coupling vibration of the stator structure and clamping components, and reduce the structural stability of the motor

Method used

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  • Single-mode driven dual-driving-feet n-shaped linear ultrasonic motor and control method thereof
  • Single-mode driven dual-driving-feet n-shaped linear ultrasonic motor and control method thereof
  • Single-mode driven dual-driving-feet n-shaped linear ultrasonic motor and control method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A single-mode driven double-drive foot-shaped linear ultrasonic motor designed by the present invention is as follows: figure 1 shown. It includes a stator 1, a mover 2, a pre-pressure applying device 3 and a base 4. Specifically, a pillar 41 is arranged on the base 4 to support the stator 1 and keep the stator 1 suspended in the air during operation, so as to keep the stator 1 and the mover 2 in contact only at the driving foot. The mover is formed by connecting two guide rails 22 through a platform 21. Two ridges 23, 24 are arranged on the platform, one of which 23 is pasted with a friction ceramic sheet, and is in contact with the driving foot on one side of the stator, and the other ridge The strip 24 is used to fix the prestressing device 3 . The pre-pressure device 3 is used to apply a pre-pressure between the stator 1 and the mover 2, and paste the friction ceramic sheet to contact with the other driving foot of the stator 1. When the preloading device 3 exert...

Embodiment 2

[0048] The difference between this embodiment and Embodiment 1 lies in that the structure of the pre-pressure applying device is different. Figure 7 Shown is a schematic structural diagram of the second pre-pressure applying device of a single-mode-driven double-drive foot-shaped linear ultrasonic motor. It includes a hinge support 35 , a preload spring 36 , a force applying bolt 37 and a force applying hole 38 . Wherein, the hinge support 35 is hinged on the mover 2 by a bolt, and a friction ceramic sheet is pasted on the side close to the stator to contact the driving foot 17 . The force application hole 38 is a threaded hole located on the mover 2, and is far enough away from the hinge point. The threaded side of the force applying bolt 37 has a large radius and is matched with the force applying hole 38 ; the non-threaded side has a small radius and can pass through the pre-compression spring 36 against the hinge support 35 . When the force applying bolt 37 is tightened...

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Abstract

The invention discloses a single-mode driven dual-driving-feet n-shaped linear ultrasonic motor and a control method thereof. The linear ultrasonic motor consists of a stator, a mover, a pre-pressureapplying apparatus and a base; the stator comprises two driving feet fixed on the base through a clamping apparatus; and the mover is a rectangular platform and connected with the base through two sliding guiding rails. The motor adopts the single mode driving pattern, and can drive the mover to perform linear motion in two directions, and the operating direction and speed can be changed by regulating frequency; the motor is compact in structure, and by virtue of design of the dual driving feet, increasing of the output efficiency and space utilization rate of the motor can be facilitated, sothat high thrust output in a small structure can be realized; by virtue of the single mode driving pattern, the motor design difficulty is lowered, and the motor has the advantages of wide driving frequency band and high interference resistance; and compared with the conventional pre-pressure applying mode, a spring and the stator are isolated in the invention, so that stator vibration does not cause coupled vibration of the pre-pressure applying apparatus, thereby improving structural stability of the motor and reducing heating and energy loss.

Description

technical field [0001] The invention discloses a single-mode driven double-drive foot-shaped linear ultrasonic motor, which belongs to the technical field of ultrasonic motors. Background technique [0002] Ultrasonic motor is a new type of micro motor that was developed and applied rapidly in the 1980s. It uses the inverse piezoelectric effect of piezoelectric elements and the ultrasonic vibration of metal blocks, and through the friction between the stator and the mover, the metal block The micro-vibration of the mover is converted into the macro-linear (rotational) motion of the mover, which directly pushes the load. It has the advantages of compact structure, high torque at low speed, fast response, high positioning accuracy and electromagnetic compatibility. It has broad application prospects in aerospace, weapon equipment and precision drive fields. However, the insufficient output characteristics of existing motors limit its application. The linear ultrasonic motor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/02H02N2/04H02N2/06
CPCH02N2/028H02N2/043H02N2/06
Inventor 姚志远黄帅军简月
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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