Bilateral magnetic flux switching permanent magnet linear motor

Abstract

The invention discloses a bilateral magnetic flux switching permanent magnet linear motor which comprises secondary cores, primary cores, primary coils and a permanent magnet. The primary cores are vertically arranged; the secondary cores are located on the left and right sides of the primary cores; the primary coils are wound in the primary cores; and the permanent magnet is located between two adjacent primary cores. Due to the bilateral structure of the bilateral magnetic flux switching permanent magnet linear motor disclosed by the invention, the normal attractive force formed between the primary cores and the secondary cores can be canceled out, and the air gap fluctuation produced by excessive attractive force is weakened, thus the performance of electromagnetic thrust and the operation stability of the motor are improved, and the motor provided by the invention is suitable for the long-distance linear motion; and moreover, the bilateral structure has small gaps in which impurities such as scrap iron cannot fall easily, and the motor maintenance cost is reduced.

Description

technical field [0001] The invention relates to an electric motor, especially a linear electric motor. Background technique [0002] With the rapid development of economy and society, people's demand for linear motors is becoming increasingly fierce. This can be well reflected in fields from industrial automation to machining, mainly because linear motors do not require additional motion conversion devices to convert rotary motion into linear motion compared with traditional rotary motors, which can Increases the efficiency of the motor and avoids energy loss during motion conversion. [0003] Commonly used linear motors mainly include linear induction motors and linear synchronous motors. The secondary structure of the linear induction motor is relatively simple, but its power factor and efficiency are low; the linear synchronous motor has the advantages of high efficiency and high power density, but because its winding and permanent magnet are respectively located in the...

AI Technical Summary

Problems solved by technology

The ratio of the thrust of the motor and the suction between the stator and the mover of this structure is 1:10~15. For the large-thrust unilateral linear motor, there is a problem of excessive suction, and the track supporting the mover needs to use a solid structure.

In addition, there is a certain friction between the motor mover and the guide rail. If the suction force is too large, it will produce obvious friction resistance and hinder the movement of the motor. Therefore, this structure has certain limitations.

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