A high positioning precision hybrid magnetic source magnetic lead screw and its multi-harmonic coordinated modulation method

Abstract

The invention discloses a high positioning precision mixed magnetic source magnetic lead screw and its multi-harmonic coordinated modulation method, which includes two parts, a magnetic nut and a magnetic screw rod, which are coaxially placed; according to the characteristics of the helical structure, through permanent magnets and The space coordination of the magnetic modulation module introduces a new effective harmonic order, which not only satisfies the modulation mechanism in the linear direction, but also satisfies the modulation mechanism in the circumferential direction, realizing multi-harmonic coordinated modulation; The winding realizes the adjustment of the air gap magnetic field of the magnetic screw and improves the positioning accuracy. The invention proposes a high positioning precision mixed magnetic source magnetic lead screw, which solves the disadvantages of the existing magnetic lead screw such as single magnetic field modulation, large magnetic flux leakage, and insufficient positioning accuracy under the premise of ensuring high reliability and high thrust density.

Description

technical field [0001] The invention relates to a design method of a mixed magnetic source magnetic lead screw with high positioning accuracy and multi-harmonic coordinated modulation, and is especially designed to a helical magnetic drive and a mixed magnetic source magnetic field modulation technology, which is suitable for aerospace, high-end machine tools, etc. with high positioning accuracy and high The application of thrust density belongs to the technical field of design and manufacture of new electric actuators. Background technique [0002] The magnetic screw has the characteristics of high thrust density, no contact friction, and simple maintenance, so it has a good application prospect in many fields such as aerospace, marine power generation and so on. At present, most of the research on magnetic screw is the surface-mounted magnetic screw with alternating N and S poles of permanent magnets radially magnetized. However, this structure has the characteristics of s...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the prior art, and propose a high positioning precision hybrid magnetic source magnetic lead screw and its multi-harmonic coordinated modulation mechanism, which solves the problem of existing problems under the premise of ensuring reliability and economy. The disadvantages of magnetic lead screw magnetic field modulation are single and the air gap magnetic field cannot be adjusted, which significantly improves the force-energy density and positioning accuracy of existing permanent magnet actuators

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