An eddy current damping magnetic spring based on multiple halbach permanent magnet arrays

Abstract

The invention relates to an electric eddy current damping magnetic spring based on multiple halbach permanent magnet arrays. The electric eddy current damping magnetic spring comprises a first halbach permanent magnet array and a second halbach permanent magnet array; and the first halbach permanent magnet array and the second halbach permanent magnet array can relatively move. The electric eddy current damping magnetic spring further comprises a third halbach permanent magnet array; and the third halbach permanent magnet array and the first halbach permanent magnet array can relatively move. The electric eddy current damping magnetic spring further comprises a first electric eddy current damping piece and the second eddy current damping piece. The electric eddy current damping magnetic spring can increase the dynamic damping characteristics of a positioning spring through adopting the electric eddy current damping pieces, so that the positioning spring is buffered during acting, the whole acting process is more gentle, and the phenomenon of excessive actions of the positioning spring is prevented.

Description

technical field [0001] The invention relates to a damping positioning component, in particular to an eddy current damping magnetic force spring based on a plurality of halbach permanent magnet arrays. Background technique [0002] Rotary springs with positioning function are widely used in industrial fields and daily life. For example, the spring doors of buildings can be positioned in the "open" and "closed" states; Angle switch. High positioning rigidity and quick switching of positioning angles are the basic requirements for industrial positioning rotary springs. [0003] The Halbach magnetic pole array forms a single-sided high-intensity magnetic field by assembling the magnetic poles arranged in a rotating magnetic field angle. The stator and rotor composed of halbach magnetic pole arrays have higher magnetic field strength than ordinary magnetic pole arrays, so they can provide higher positioning torque and switching speed. For example, US Patent No. 7,265,470A disc...

AI Technical Summary

Problems solved by technology

However, since the positioning and rotating spring disclosed in the above patent has no damping, excessive centrifugal force is easily caused when rotating too fast, which makes the balance point vibrate and brings unnecessary shaking and impact to the equipment mounted on the spring.

For example, if the rotation positioning spring of the above-mentioned patent is installed on the spring door, during the opening / closing switching process, the spring door will violently move to the balance point of opening or closing, which is obviously not conducive to the use and maintenance of the spring door

Therefore, ordinary positioning springs have the problem of excessive rotation or linear motion without buffering

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