Dual-driving foot longitudinal-vibration mode stacked linear ultrasonic motor and working mode and electric exciting manner

A mode superposition and ultrasonic motor technology, applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve problems such as low speed, low efficiency, and small output force

Inactive Publication Date: 2007-11-14
JIANGSU FENGKE ULTRASONIC MOTORS TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two forms of mode superposition linear ultrasonic motors have simple structure and flexible design, but they have low efficiency, low speed and small output force.

Method used

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  • Dual-driving foot longitudinal-vibration mode stacked linear ultrasonic motor and working mode and electric exciting manner
  • Dual-driving foot longitudinal-vibration mode stacked linear ultrasonic motor and working mode and electric exciting manner
  • Dual-driving foot longitudinal-vibration mode stacked linear ultrasonic motor and working mode and electric exciting manner

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Embodiment Construction

[0013] A dual-drive foot longitudinal vibration mode superimposed linear ultrasonic motor is shown in Figure 1. Its characteristics: The stator is composed of two piezoelectric vibrators connected symmetrically. Each piezoelectric vibrator is composed of a middle block 21, a front end cover 41, a rear end cover 11, and piezoelectric ceramics 31. The piezoelectric ceramics are distributed between both sides of the middle block and between the front and rear end covers, and are tightened by pressing bolts 12. Compression, used to excite the stator to vibrate. The front covers of the two piezoelectric vibrators are connected into one body, and two driving feet 42 are distributed on the lower end thereof. The mover is composed of a slide bar 61 , the upper surface of which is bonded with a friction layer 51 . Use the same frequency sinusoidal signal with a phase difference of π / 2 to simultaneously excite the left and right piezoelectric vibrators to respectively excite the two v...

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Abstract

Stator of motor is composed of two identical piezoelectric vibrators (PV) connected symmetrically. PV includes back end-cover, front end-cover, intermediate block, and piezoelectric ceramics. Two PVs are connected symmetrically on the front end-cover, where there are two drive feet. Movers of the motor are slide bars with friction layer on surface. Working states include modes: when two PVs do longitudinal vibrations (LV) inverted each other, anti symmetrical vibration (SV) mode of the stator is excitated; when two PVs of the stator do in phase LV, SV mode is excitated. Using two sinusoid signals with phase difference (PD) as pi /2 excites two PVs of stator simultaneously so as to excite mode of vibration of stator in co-frequency with PD as pi /2. Thus, the up drive foot of the stator drives particle of the drive foot to do elliptic motion so as to drive movers to do rectilinear motion (RM) continuously. Advantages are: outputting RM in large moment, high speed and high efficiency.

Description

Technical field: [0001] The dual-drive foot longitudinal vibration mode superimposed linear ultrasonic motor, working mode and electric excitation method of the present invention belong to the field of ultrasonic motors. Background technique: [0002] Ultrasonic motor is a new type of power output device that utilizes the inverse piezoelectric effect of piezoelectric ceramics and ultrasonic vibration. Linear ultrasonic motors are a major category of ultrasonic motors. Among them, the multi-mode superimposed linear ultrasonic motor is a kind of linear ultrasonic motor. At present, the mode superposition methods often used in the mode superposition linear ultrasonic motor include the superposition of the longitudinal vibration mode and the bending vibration mode, and the superposition of the bending vibration mode and the bending vibration mode. These two forms of modal superimposed linear ultrasonic motors use two modal vibrations with close frequencies of the stator elasti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/00H02N2/02H02N2/04
Inventor 赵淳生李玉宝
Owner JIANGSU FENGKE ULTRASONIC MOTORS TECH
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