Permanent magnet linear motor with simultaneous movement of armature and permanent magnet yoke and its operating method

Abstract

The invention discloses a permanent-magnet linear motor with simultaneous motion of armatures and permanent magnet yokes and an operation method thereof. The permanent-magnet linear motor comprises amover, a stator and two linear bearings. The mover consists of an armature, a mover fixed connection structure, two permanent-magnet yokes and three armature connection terminals. The stator includesa stator bracket and two permanent magnet groups; the permanent magnets are magnetized along an air gap direction and are fixed at the stator bracket vertically and downwardly; the linear bearings arearranged at the stator bracket along the two sides of the permanent magnets; and the armature and the permanent-magnet yokes are connected at the top of the motor by the mover fixed connection structure to form a mover of the motor, and the lower part of the mover is connected with the linear bearings to realize linear motion of the motor. The permanent-magnet linear motor has advantages of simple structure, low cost, light weight, and great easiness in controlling; the motor weight and the cost can be reduced effectively; and the power density and thrust density of the permanent-magnet linear motor are improved.

Description

technical field [0001] The invention belongs to the field of motors, and in particular relates to a permanent magnet linear motor with simultaneous movement of an armature and a permanent magnet yoke and an operating method thereof. Background technique [0002] Because permanent magnet linear motors have the advantages of simple structure, high thrust density, high power density, high operating accuracy, high acceleration, and simple maintenance, they are widely used in industries, rail transit, and national defense. Permanent magnet linear motors can adopt two structural forms: moving armature and moving permanent magnet. [0003] On November 5, 2014, Liu Jizhu of Soochow University and others published the "Permanent Magnet Linear Synchronous Motor", which adopts a moving permanent magnet structure, and the stator part is longer, requiring segmental control, which increases the complexity of motor control. Therefore, when large thrust and high acceleration are required, ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a permanent magnet linear motor and its operation method with simultaneous movement of the armature and the permanent magnet yoke, which solves the problem that the permanent magnet yoke of the existing moving armature permanent magnet linear motor is in an invalid state

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