Linear motor

Abstract

The invention discloses a linear motor. The motor comprises a mounting mechanism, the mounting mechanism is fixedly connected with a plurality of permanent magnets; at least one permanent magnet formsa permanent magnet group; at least four permanent magnet groups form a permanent magnet column; the two permanent magnet columns are distributed in parallel; three coil groups are arranged between the two permanent magnet columns; and magnetic poles in the same side of all permanent magnet groups of one permanent magnet column are arranged according to the following rules: the magnetic pole polarity of the first permanent magnet group is N pole, the magnetic pole polarity of the second permanent magnet group is S pole, the magnetic pole polarity of the odd-numbered permanent magnet group is the same as the magnetic pole polarity of the previous permanent magnet group from the third permanent magnet group, and the magnetic pole polarity of the even-numbered permanent magnet group is opposite to the magnetic pole polarity of the previous permanent magnet group. When the same driving force is output, a smaller number of permanent magnets are used, the size of the linear motor is reduced,the production cost is reduced, the utilization efficiency of the permanent magnet single bodies is improved, and the practicability is high.

Description

[technical field] [0001] The invention relates to a linear motor. [Background technique] [0002] Linear motors are widely used in rail transit, machine tools, amusement facilities and other equipment. The permanent magnet arrangement structure of existing linear motors generally consists of several permanent magnet monomers (magnets) of the same specification arranged side by side to form two parallel permanent magnets. In the magnet row, the polarities of the opposite permanent magnet single poles between the two permanent magnet rows are opposite, and the polarities of all the permanent magnet single poles on one side of one permanent magnet row are alternately arranged with N poles and S poles. In order to obtain sufficient driving force, the existing linear motor needs to use a large number of permanent magnets, the utilization efficiency of the permanent magnet is low, the volume of the linear motor is large, and the production cost is high. Under the condition that t...

AI Technical Summary

Problems solved by technology

In order to obtain sufficient driving force, the existing linear motors need to use a large number of permanent magnets. The utilization efficiency of permanent magnets is low, the volume of linear motors is large, and the production cost is high.

In the case of constant output power, the driving force of the existing linear motor fluctuates in a large range, generally as high as 15%, which is not conducive to the normal and stable operation of the equipment

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