A driving method of a tilting sub-tower piezoelectric motor with anti-friction and modal drive

Abstract

The invention belongs to the piezoelectric motors and discloses an anti-friction and modal driven oblique-rotor tower-shaped piezoelectric motor and a drive method thereof. The anti-friction and modal driven oblique-rotor tower-shaped piezoelectric motor is composed of a tower-shaped stator and an oblique rotor. The stator comprises a tower-shaped metal element and ten three-phase piezoelectric ceramics. The tower-shaped metal element is composed of a drive foot, a flexible amplification round hole and two rectangular columns. The three-phase piezoelectric ceramics are symmetrically attached to the surface of the tower-shaped metal element. The oblique rotor is a linear guide rail obliquely arranged and compressed on the drive foot of the tower-shaped stator under precompression. The motor is provided with a resonant drive method and a non-resonant drive method. In the resonant drive method, the tower-shaped stator drives the guide rail to do forward and reverse motion under the anti-friction and modal drive; in the non-resonant drive method, the tower-shaped stator drives the guide rail to do forward and reverse motion under the anti-friction and forced vibration drive. Compared with the prior art, the anti-friction and modal driven oblique-rotor tower-shaped piezoelectric motor has the advantages that output power is increased, drive frequency band is wide, and operation is reliable.

Description

[0001] Technical field: [0002] The anti-friction and modal-driven oblique sub-tower piezoelectric motor of the present invention belongs to the field of piezoelectric motors. [0003] Background technique: [0004] Piezoelectric motor is a new type of power output device that uses the inverse piezoelectric effect of piezoelectric ceramics to work. Among them, the linear piezoelectric motor is a kind of piezoelectric motor. Compared with traditional electromagnetic motors, piezoelectric motors have the advantages of low speed and large torque, fast transient response, high positioning accuracy, good control characteristics, no magnetic field and no magnetic field influence, etc. and other fields have broad application prospects. [0005] According to the literature search of the existing oblique actuator piezoelectric motor, the inventors of the patent are Huang Weiqing and Chen Qianwei, and the patent authorization number is ZL 200910185020.X. A tower-shaped linear piezoel...

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Problems solved by technology

[0008] The inventors of the patent are Huang Weiqing and Chen Qianwei, and the patent authorization number is ZL 200910185020.X. The Chinese patent "Bidirectional Single-mode Inclined Rail Tower-shaped Linear Ultrasonic Motor and Electric Excitation Method" describes the oblique mover sticking chip tower-shaped linear piezoelectric motor The disadvantage is that the piezoelectric motor adopts a single-mode drive, which is a mature design scheme; but from the perspective of technological progress, it should be pasted on the oblique mover described in this patent. On the basis of the single-mode driving mechanism of electric motors, other driving mechanisms are incorporated to develop new piezoelectric motors

[0009] The inventors of the patent are Chen Qianwei, Zhou Kuanjian and Zhou Xia, and the patent application number is CN201310365952.9. The single-drive foot-plate piezoelectric motor described in the Chinese patent "Single-mode and anti-friction-driven single-foot-shaped piezoelectric motor and its working mode" The disadvantage of the electric motor is that: the single-mode driving mechanism of the piezoelectric motor adopts the E(3,1) vibration mode with asymmetric excitation and asymmetric attenuation; The E(3,1) vibration mode with symmetrical excitation and asymmetric attenuation has specific requirements on the structural form and structural size of the plate-shaped piezoelectric motor, which limits the scope of application of the piezoelectric motor; in addition, the piezoelectric motor is in The driving of forced vibration in the non-resonant driving mode is the "stick-slip" driving mode. The typical feature of the "stick-slip" driving mode is that the stator and the mover are always in contact during the driving process, which limits the power output of the motor

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