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
CN101071995AInactive Publication Date: 2007-11-14JIANGSU FENGKE ULTRASONIC MOTORS TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU FENGKE ULTRASONIC MOTORS TECH
Publication Date
2007-11-14
Estimated Expiration
Not applicable · inactive patent

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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.
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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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