Mixed excitation magnetic suspension feeding platform

Abstract

The invention discloses a mixed excitation magnetic suspension feeding platform. The mixed excitation magnetic suspension feeding platform is composed of a suspended working table, a V-shaped guide rail and two linear motors, wherein the suspended working table is a frame structure which is structurally matched with the V-shaped guide rail; the suspended working table and the V-shaped guide rail are symmetrically about a central axis; the two linear motors are mounted on the suspended working table and the V-shaped guide rail and are symmetrically about the central axis. Each linear motor comprises an iron core rotor and an iron core stator, wherein the iron core rotor is connected with the suspended working table, and the iron core stator is mounted on the V-shaped guide rail. According to the mixed excitation magnetic suspension feeding platform, by arranging a simple structure without any electromagnet, the suspension power consumption can be reduced, the cost can be saved, meanwhile, the equipment complexity can be reduced, and the suspension stability and the positioning precision can be improved.

Description

technical field [0001] The invention relates to a feeding platform technology of a numerical control machine tool, in particular to a hybrid excitation magnetic levitation feeding platform. Background technique [0002] During the feeding process of CNC machine tools, there is friction between the moving parts and the guide rail, and the existence of this friction is harmful to the feeding movement. First, it increases the power loss of the drive system, reduces efficiency, motion accuracy and service life, and increases maintenance costs. Second, it generates motion noise and system heat, and even deforms delicate components. Due to the non-linear relationship between friction and motion speed, especially in the case of small amount and low-speed feed, this non-linear relationship is difficult to grasp, and may even cause crawling, which seriously damages the drive system for high speed. Performance requirements for precision and high responsiveness. [0003] Industry R&...

AI Technical Summary

Problems solved by technology

First, the vertical suspension force, horizontal guidance force, and horizontal driving force of the suspension system are independently generated by different systems, and the structure is relatively complex, and at least three controllers are required, including the suspension controller, the guidance controller, and the drive controller. There are many links to be controlled and the cost is expensive

Second, in addition to the useful electromagnetic driving force provided by the linear motor, there is also an inherent normal magnetic attraction force, which is often much larger than the electromagnetic driving force, and will change with the change of the armature current, thus affecting Suspension Stability and Positioning Accuracy of Suspended Platform

Images