A switch reluctance linear motor without linear bearing

Abstract

A switch reluctance linear motor without a linear bearing is composed of a mover and a stator with an air gap therebetween. The length of the stator is larger than the length of the rotor. The statorconsists of n thrust mechanisms, n + 1 bearingless mechanisms, 2n + 1 ''E'' type rotor teeth, 2n + 2 bias excitation sources, n thrust coils, n + 1 suspension coils and 2n + 1 magnetic isolation mechanisms. The bearingless mechanism comprises ''E'' type rotor teeth, a bias excitation source a, a bias excitation source b and a suspension coil, wherein the suspension coil is wound on the middle tooth of the ''E'' type rotor tooth, and the bias excitation source a and the bias excitation source b have opposite excitation directions; the single thrust mechanism comprises ''E'' type rotor teeth anda thrust coil, and the thrust coil is wound on the middle teeth of the ''E'' type rotor teeth; and the ''E'' type rotor teeth of the thrust mechanism and the ''E'' type rotor teeth of the bearinglessmechanism are adjacent structures. The interval design of the bearingless mechanism and the thrust mechanism realizes the decoupling of the suspension magnetic field and the thrust magnetic field from the mechanical structure.

Description

technical field [0001] The invention belongs to the field of linear motors, in particular to a linear bearing-free switched reluctance linear motor. Background technique [0002] With the development of industrial applications, linear motors are used more and more widely. In the case of linear drive, compared with rotary motors, linear motors directly convert electrical energy into mechanical energy for linear motion without intermediate conversion links. The structure is simple, the dynamic response is fast, the efficiency is high, and the construction cost is low. Linear motors are supported by linear bearings to ensure the size of the air gap. Linear bearings will affect the mechanical characteristics and life of linear motors. The combination of bearingless magnetic levitation technology and linear motor can solve this problem and lead to some new technologies, such as magnetic levitation trains, production conveyor lines, etc. In the selection of linear motors, perman...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem that the existing bearingless magnetic levitation technology is applied to the switched reluctance linear motor, which has the coupling of the levitation force magnetic field and the thrust magnetic field, the control algorithm is complicated, and the levitation force control needs to know the position information of the stator. Non-linear bearing switched reluctance linear motor, its bearingless mechanism and thrust mechanism are decoupled on the mechanical structure, through the special design of the motor structure and the bearingless mechanism, the air gap permeance of the levitation coil is constant, that is, the levitation force current control Decoupled from the stator position, the levitation force does not change with the stator position

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