Single-excitation rotary ultrasonic motor

An ultrasonic motor, single excitation technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc. Affect the motor torque and speed stability, poor motor torque and speed stability, etc., to achieve stable vibration performance, high energy conversion efficiency, and large power capacity

Inactive Publication Date: 2013-07-17
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the motor has the advantages of large output torque, the six piezoelectric ceramic sheets of the motor must be staggered and installed by 60 degrees according to the polarization partition, and its structure is complicated. Spiral motion (rotational force) can easily cause misalignment between piezoelectric ceramic sheets, and it is difficult to ensure the technical requirement of 60 degrees of misalignment between adjacent piezoelectric ceramic sheets; in addition,

Method used

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  • Single-excitation rotary ultrasonic motor
  • Single-excitation rotary ultrasonic motor

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Embodiment Construction

[0014] combine figure 1 As shown, a single-excitation rotary ultrasonic motor includes a stator and a rotor. The rotor includes a turntable 8 and a friction layer 9 bonded to the surface of the turntable 8; the stator includes an ultrasonic vibration transducer, an elliptical vibration mode converter 6 and a friction drive Block 10; the ultrasonic vibration transducer includes a bolt 1 and a rear cover 2, a piezoelectric ceramic sheet 3, an electrode sheet 4 and a front cover 5 which are sequentially sleeved on the bolt 1, and the front cover 5 and the bolt 1 are connected by threads Press and fix the rear cover 2, the piezoelectric ceramic sheet 3, the electrode sheet 4 and the front cover 5. The single-excitation rotary ultrasonic motor has only one set of longitudinal vibration piezoelectric ceramic sheets 3, the diameter of the piezoelectric ceramic transducer section is 30 mm, the material of the piezoelectric ceramic sheets 3 is PZT-8, and the size is: Ф30mm×Ф15mm×5mm ...

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Abstract

The invention discloses a single-excitation rotary ultrasonic motor. A rotor comprises a rotating disk and a frictional layer arranged on the surface of the rotating disk; a stator comprises an ultrasonic vibration transducer, an elliptical vibration mode converter and a friction drive block which is arranged at the front end of the elliptical vibration mode converter; the ultrasonic vibration transducer comprises a bolt and a rear cover plate, piezoelectric ceramic sheets, an electrode plate and a front cover plate which are sleeved on the bolt sequentially; the front end plate is in threaded connection with the bolt; the elliptical vibration mode converter is arranged at the front end of the front cover plate, and is cylindrical integrally; three staggered rectangular notches are formed on the upper side and the lower side of the elliptical vibration mode converter; and the elliptical vibration mode converter can convert longitudinal ultrasonic vibration generated by the ultrasonic vibration transducer to elliptical vibration of the tail end of the elliptical vibration mode converter and the friction drive block, and can drive the rotor to make continuous rotation motion.

Description

technical field [0001] The invention relates to the field of ultrasonic motors utilizing the inverse piezoelectric effect of piezoelectric ceramics, in particular to a single-excitation rotary ultrasonic motor. Background technique [0002] The rotary ultrasonic motor is a new type of micro-motor developed and applied rapidly in the 1980s. It is an electromechanical coupling device that uses the inverse piezoelectric effect of piezoelectric materials to convert electrical energy to mechanical energy. Through the friction between the stator and the rotor, the The micro-vibration of the elastomer is converted into the macro-rotational motion of the rotor, which directly drives the load. Because of its small size, light weight, low speed and high torque, low noise, fast response, high positioning accuracy, no electromagnetic interference and strong environmental adaptability, it has been increasingly widely used in medical, aerospace, robotics, MEMS and other technical fields. ...

Claims

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Application Information

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IPC IPC(8): H02N2/10H02N2/12
Inventor 殷振李华曹自洋李艳汪帮富谢鸥刘义生吴永芝任坤陈玉荣
Owner SUZHOU UNIV OF SCI & TECH
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