Homopolar permanent magnet linear synchronous motor

Abstract

The invention discloses a homopolar permanent magnet linear synchronous motor, and belongs to the field of linear synchronous motors. The motor comprises a primary, a secondary and two air gaps formedbetween the primary and the secondary, the primary comprises a primary iron core, a primary armature winding, an excitation iron core and a permanent magnet; the secondary comprises a secondary backyoke iron core and iron core tooth pole arrays, the iron core tooth pole arrays are divided into two groups, the distance between two adjacent iron core teeth in the same group is tau, tau is the poledistance, the two groups of iron core teeth are arranged in a staggered manner, the staggered distance is tau, and the electrical angle difference is 180 degrees. The armature windings are wound on the primary iron core in a centralized mode, the permanent magnets are arranged at the left end and the right end of the primary iron core, the secondary structure is simple, eddy-current loss is small, efficiency is high, machining cost is low, self-suspension can be achieved, mechanical contact is avoided, the permanent magnet synchronous motor is suitable for occasions with large air gaps, suchas the field of high-speed maglev trains, and requirements for rails are reduced.

Description

technical field [0001] The invention belongs to the field of linear synchronous motors, and more specifically relates to a permanent magnet linear synchronous motor with the same polarity. Background technique [0002] With the exploration and development of linear motor technology, linear motors are increasingly used as driving devices in the field of transportation. The linear motor saves the intermediate transmission coupling device, which has great advantages compared with the rotary motor. With the pursuit of speed by human beings, maglev trains have become a research hotspot in the field of transportation. The permanent magnet linear synchronous motor has many advantages as the drive of the maglev train. The permanent magnet linear motor can generate thrust and levitation force at the same time, which can save the support device for separate levitation, making the structure simple. In addition, the permanent magnet is used as the excitation Source, no need for electr...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention proposes a permanent magnet linear synchronous motor with the same polarity to reduce the eddy current loss generated in the secondary of the linear motor, so that the secondary structure can adopt a solid iron core, and the processing technology becomes simple. Solve the problem of large secondary eddy current loss and high processing cost of permanent magnet linear synchronous motor

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