A Tangentially Magnetized Flux Reverse Hybrid Excitation Linear Motor

Abstract

The invention discloses a tangentially magnetized magnetic flux reverse mixed excitation linear motor, comprising a primary mover and a secondary stator, the primary mover is formed by connecting primary modules in parallel, the primary mover and The secondary stators are all made of magnetically permeable materials, the secondary stators are salient pole structures with equal tooth widths, there is an air gap between the primary movers and the secondary stators, and the two sides of the primary module are respectively There are two armature teeth, an excitation tooth is arranged between the two armature teeth, a set of armature windings is wound around each of the armature teeth, and a set of armature windings is wound around each of the excitation teeth. The field winding is covered, and two pieces of tangentially magnetized permanent magnets with opposite polarities are attached to the ends of the armature teeth. The risk of irreversible demagnetization of the permanent magnet is reduced, and the reliability of the motor is improved. It solves the problem that the narrow magnetic bridge is easy to saturate. The fault tolerance performance of the motor is improved. Suitable for applications requiring a wide range of variable speed operation.

Description

technical field [0001] The invention relates to a flux reversal motor, in particular to a tangentially magnetized flux reversal hybrid excitation linear motor. Background technique [0002] Where linear transmission is required, linear motors have higher transmission efficiency than rotary motors, which can improve the performance of the entire system. Especially in the wheel-rail transportation system, the linear motor has the advantages of strong climbing ability, strong line applicability, low engineering cost and low noise. Today, induction linear motors have been used in urban rail transit in various countries. However, induction motors have large excitation losses and low power factors. Compared with induction motors, permanent magnet linear motors have higher power index, higher efficiency, and higher power factor. However, for traditional permanent magnet linear motors, no matter whether the winding or permanent magnets are laid along the track, the manufacturing ...

AI Technical Summary

Problems solved by technology

However, the width of the magnetic bridge is narrow and easy to saturate, which restricts the magnetic adjustment ability of the motor

Segmented rotors also bring troubles to manufacturing, processing and installation

In addition, in the above motor structure, the magnetization direction of the permanent magnet is radial, and the magnetic potential generated by the current passing through the armature and the field winding is connected in series. The permanent magnet is prone to irreversible demagnetization, which will cause the motor to fail.

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