A high-speed resonance impulse piezoelectric motor

Abstract

The invention discloses a high-speed resonance impact type piezoelectric motor, which comprises a stator, a mover, a first vibrator driving mechanism and a second vibrator driving mechanism. The stator is fixed at the middle position of the two vibrator driving mechanisms as an output end. The surface of the rotor forms a quasi-sawtooth wave vibration. The mover is a cross-roller slide table, which is fixed on a one-dimensional fine-tuning platform. The front side of the mover contacts with the stator through the friction interface to generate frictional force to form a stick-slip effect, and thus drives the motor. child for directional movement. The invention realizes cross-scale output with both high speed and high resolution through cross-frequency excitation, can effectively improve the operating frequency and output speed of the impact piezoelectric motor, is beneficial to high-power output, and is suitable for high-speed motion.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric motors, and more particularly relates to a resonance impact piezoelectric motor. Background technique [0002] Piezoelectric motors use the inverse piezoelectric effect of piezoelectric materials to generate micro-deformation by applying voltage to them to achieve motor motion. They have the advantages of fast response time and no electromagnetic interference. They are widely used in robotics, aerospace and medical fields. At present, there are two main types of piezoelectric motors: resonant type and quasi-static type. [0003] The resonant piezoelectric motor mainly refers to the ultrasonic motor, which uses the stator to generate high-frequency elliptical motion in the ultrasonic frequency band, and converts the elliptical motion of the stator into the continuous linear or rotational output of the mover through friction coupling, thereby realizing the conversion of electrical energy into ...

AI Technical Summary

Problems solved by technology

[0004] The traditional impact motor works at a non-resonant frequency, most of which are soft ceramics, which can achieve large displacement, the material is PZT5 called soft ceramics, and the materials are PZT4 and PZT8 called hard ceramics, their main differences The mechanical quality factor is different. The mechanical quality factor of soft ceramics is much lower than that of hard ceramics, which is not suitable for high-speed movement.

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