High-thrust piezoelectric linear motor driven by three-phase longitudinal vibration modality driven

Abstract

The invention discloses a high-thrust piezoelectric linear motor driven by three-phase longitudinal vibration modality, which comprises a stator component, a rotor component, and a pedestal component. The high-thrust piezoelectric linear motor driven by three-phase longitudinal vibration modality is characterized in that: the stator component is connected with the pedestal component through a bolt; the rotor component is connected with the pedestal component through a rolling rail pair; and the stator component is connected with the rotor component through a friction pair. The high-thrust piezoelectric linear motor driven by three-phase longitudinal vibration modality has the technical effects that: (1) d33 effect of a piezoelectric lamination is used to excite the longitudinal vibration of cross rods and longitudinal rods to push, which can drive a motor to output a larger power; (2) two longitudinal rods in the stator component alternatively drive the rotor component in the same vibration period, which can drive the motor to output a larger speed and increase the thrust of the motor; high stator vibration frequency, small drive step pitch and high position distinguishability can drive the motor to realize submicron-grade and even higher-grade locating precision; the stator component is of a plane H structure, which is beneficial for realizing the thinning and lightening of the motor; the rotor component is designed into a structure with proper flexibility, which can guarantee an ideal contact state between the stator component and the rotor component, and is beneficial for improving the stability of the motor and reducing the heating of the motor; moreover, a rolling rail is adopted between the rotor component and the pedestal component, which can greatly reduce the running resistance of the motor, and is beneficial for improving the efficiency and response speed of the motor.

Description

technical field [0001] The invention relates to a linear motor, in particular to a large-thrust piezoelectric linear motor driven by a three-phase longitudinal vibration mode. Background technique [0002] Piezoelectric Linear Motor (PLM) is an important branch of ultrasonic motor. It uses the inverse piezoelectric effect of piezoelectric ceramics to excite the ultrasonic vibration of the elastic body to convert mechanical energy into electrical energy, and then through the contact between the stator and the mover. The friction process converts the micro-vibration of the elastic body into the macro-linear motion of the mover and pushes the load. Compared with electromagnetic motors, PLM has a series of advantages such as high power density, fast response, direct drive, accurate positioning, no noise, flexible structure, electromagnetic compatibility, small and light weight, etc. It has broad application prospects in many fields such as machinery and biomedical engineering, ...

AI Technical Summary

Problems solved by technology

[0003] Looking at the development and status quo of PLM technology at home and abroad, it can be clearly seen that on the one hand, the development of PLM is very rapid at present, and its application pace is accelerating. However, at the same time, it is not difficult to find that the PLM technology so far is far from being mature, and it still has a series of problems such as small output power, low efficiency, unstable performance, and short lifespan. , there is still a long way to go before wide industrial application

In particular, the current PLM is still extremely limited in structure, making it unable to meet the requirements of large power, high precision, faster response, and diverse structures in the application field.

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