Permanent magnet synchronous linear motor for suppressing magnetic resistance

Abstract

The invention relates to a permanent magnet synchronous linear motor for suppressing magnetic resistance. The permanent magnet synchronous linear motor comprises a primary winding and a secondary winding, wherein the secondary winding is provided with a linear guide rail; the primary winding is arranged on the linear guide rail; an air gap is reserved between the primary winding and the secondary winding; the primary winding comprises an active cell iron core formed by stacking a plurality of straight slot type silicon steel sheets, and a plurality of hollow coils; each hollow coil is embedded into each straight slot of each straight slot type silicon steel sheet; one half coil and the other half coil of each hollow coil are respectively embedded into two adjacent straight slots; one half coil of each of two adjacent hollow coils is embedded into the same straight slot; and insulation layers are arranged between two adjacent hollow coils and between each hollow coil and each straight slot type silicon steel sheet. The width D of the straight slot in the end of each straight slot type silicon steel sheet is smaller than the width L of the straight slot in the middle of each straight slot type silicon steel sheet; and the height b of a straight tooth at the end of each straight slot type silicon steel sheet is smaller than the height m of a straight tooth in the middle of each straight slot type silicon steel sheet. By the permanent magnet synchronous linear motor, tooth groove force and end force are reduced; the magnetic resistance is effectively suppressed; and therefore, thrust fluctuation in a running process is reduced, and the positioning precision is improved.

Description

technical field [0001] The invention relates to a linear motor, in particular to a permanent magnet synchronous linear motor which suppresses magnetic resistance. Background technique [0002] Generally, linear motion is converted by a rotary motor by using a ball or roller screw or a belt or pulley, but the traditional "rotary motor + screw" indirect drive structure has backlash, motion hysteresis, friction And other shortcomings, so the concept of "direct drive" appeared. Linear motor is a device that directly converts electrical energy into linear motion mechanical energy. It is a linear transmission device that does not require any intermediate conversion mechanism. It can be regarded as a rotating motor that is cut radially and developed into a plane. become. However, due to the unique mechanical structure of the linear motor, there are still the following deficiencies: first, the end of the mover core of the linear motor is discontinuous, resulting in the end force o...

AI Technical Summary

Problems solved by technology

[0003] The invention mainly solves the technical problems that the original linear motor has large magnetic resistance, which causes thrust fluctuations and low positioning accuracy of the linear motor during operation; it provides a permanent magnet synchronous linear motor that suppresses the magnetic resistance. It can well suppress the magnetic resistance, effectively reduce the thrust fluctuation during operation, and improve the positioning accuracy

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