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Motor based on direct piezoelectric impact rotation

A piezoelectric and direct technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., which can solve the problems of affecting service life, unstable long-term operation, and difficult structure. , to achieve the effect of improving the service life

Inactive Publication Date: 2009-12-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the characterization of this type of motor is very complicated and its structure is difficult to miniaturize; the wear of the rotor / stator junction seriously affects its service life (only 2000 hours), and the long-term operation is unstable

Method used

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  • Motor based on direct piezoelectric impact rotation
  • Motor based on direct piezoelectric impact rotation
  • Motor based on direct piezoelectric impact rotation

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Such as figure 1 As shown, the present invention includes an outer ring 1, an L-shaped elastic rotor 2 and a piezoelectric stack 3 stacked on an inner side of the L-shaped elastic rotor 2; The electric impact energy and the cogging rotation of the entire inner circle of the outer ring 1 rotate.

[0017] The mass block 4 is arranged on the piezoelectric stack 3 to increase the inertial impact capability, so as to improve the efficiency of motor rotation.

[0018] The L-shaped elastic rotor 2 is made of elastic material with equal length on both sides, such as spring steel sheet.

[0019] The ultrasonic motor is composed of an outer ring 1, an L-shaped elastic rotor 2, and a precisely controlled piezoelectric stack 3. The two end points (A, B) of the L-shaped structure are not fixedly connected to the outer ring 1, and high-precision matching tooth grooves are made on the end points and the outer ring 1 to reduce the gap between the outer ring 1 and the inner L-shaped e...

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Abstract

The invention discloses a motor based on direct piezoelectric impact rotation. It includes the outer ring, the L-shaped elastic rotor and the piezoelectric stack stacked on the inner side of the L-shaped elastic rotor; the serrations at the two ends of the L-shaped elastic rotor are due to the direct piezoelectric impact energy and the cogging of the entire inner circle of the outer ring Mesh rotation. Compared with the traveling wave motor, which transmits the piezoelectric vibration wave from the stator membrane and relies on friction to push the rotor to move, the present invention adopts the direct piezoelectric vibration transposition method. Obviously, the rotational movement of the direct piezoelectric impact is beneficial to improve the torque of the motor; in addition, when the L-shaped elastic rotor of the present invention rotates, there is no friction with the outer ring, and the two ends of the L-shaped elastic rotor match the shape of the outer ring. The possibility of sliding between the fixed end and the outer ring is eliminated, and these designs greatly improve the service life of the motor. The invention can be widely used in the fields of consumer electronics, micro-electromechanical equipment, micro-medical devices and micro-robots.

Description

technical field [0001] The invention relates to a piezoelectric ultrasonic motor, in particular to a motor based on direct piezoelectric impact rotation. Background technique [0002] The market demand for practical micro-motors is huge, but due to the effect of scaling down, although traditional electromagnetic motors have a high rotational speed, they are difficult to be practical due to their low efficiency and too small torque (the torque of a 1cm3 micro-electromagnetic motor is only a few μNm). Many research groups have therefore turned to the development of high-energy piezo-actuated motors, often referred to as ultrasonic motors, due to the high frequency of piezoelectric actuation, usually in the ultrasonic frequency range. Ultrasonic motors can be divided into two categories: linear ultrasonic motors and rotary ultrasonic motors. [0003] In fact, miniature linear ultrasonic motors have been successfully applied in many fields (optical memory storage and medical d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/10H02N2/12
Inventor 刘伟庭傅新凯撒-斯特方尼保罗-达里奥乔凡尼-奥兰帝
Owner ZHEJIANG UNIV
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