Rotary ultrasonic motor driven by multiple feet in bending vibration mode

A technology of bending vibration and ultrasonic motor, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problems of difficult processing, complex stator structure, large volume, etc. , to achieve the effect of small processing difficulty, small overall volume and simple driving control method
CN110971141APending Publication Date: 2020-04-07XIAMEN CITY UNIV XIAMEN RADIO & TV UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
XIAMEN CITY UNIV XIAMEN RADIO & TV UNIV
Publication Date
2020-04-07

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Abstract

The invention discloses a rotary ultrasonic motor driven by multiple feet in a bending vibration mode. The rotary ultrasonic motor comprises a shell, a stator installed in the shell, a rotor capable of penetrating through the stator in a rotating mode and a driving power source installed outside the shell. The stator comprises a hollow multi-frame-shaped elastic body and a plurality of piezoelectric ceramic pieces; two piezoelectric ceramic pieces are arranged on each outer edge of the multi-frame-shaped elastic body, and driving feet extend out of the inner edges of the multi-frame-shaped elastic body respectively; the two piezoelectric ceramic pieces located on the same outer edge are located on the two sides of the driving feet on the corresponding inner edges; each piezoelectric ceramic piece is divided into two groups, the two groups of piezoelectric ceramic pieces are electrically connected with the corresponding output ends of the driving power supply respectively, the two piezoelectric ceramic pieces on the same outer edge are located in different groups respectively, and the two adjacent piezoelectric ceramic pieces are also located in different groups respectively. Compared with the prior art, the structure is simple, the driving control mode is simple, and the output efficiency of the rotary ultrasonic motor is improved; meanwhile, the processing difficulty of each part is low.
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Description

technical field

[0001] The present invention relates to a rotary ultrasonic motor, more particularly to a rotary ultrasonic motor driven by multiple legs using a bending vibration mode. Background technique

[0002] Ultrasonic motor is a new type of micro motor. Rotary ultrasonic motor is a type of ultrasonic motor. Its working principle is to use the inverse piezoelectric effect of piezoelectric elements to convert the input electrical energy into mechanical energy and excite the ultrasonic frequency of the stator vibrating body. Mechanical vibration (micron level), and directly drives the rotor to rotate through the frictional coupling between the stator and the rotor.

[0003] Compared with traditional electromagnetic motors, ultrasonic motors have the advantages of fast response speed (millisecond level), high positioning accuracy, no electromagnetic interference, and self-locking when power is off. Wide application prospects. However, the current rotary ultrasonic mot...

Claims

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