Double-stator rotor-yoke-free oriented silicon steel sheet permanent magnet linear motor

Abstract

The invention provides a double-stator rotor-yoke-free oriented silicon steel sheet permanent magnet linear motor. The permanent magnet linear motor comprises U-shaped double stators, a rotor iron core and a rotor bearing plate. The U-shaped double stators have a U-shaped structure formed by two vertical plates and one transverse plate. Two rows of permanent magnets are installed on the internal walls of the two side vertical plates of the U-shaped structure. A guide rail is installed on the top part of each side vertical plate. The double-stator double-air-gap structure is used, and the rotoruses the iron core structure so that the air gap magnetic co-nergy can be enhanced and the thrust density of the motor can be effectively increased. Besides, the anisotropic magnetic performance of the oriented silicon steel sheets and the magnetic circuit characteristics of the motor are combined, and the magnetic line direction of the rotor teeth and the high magnetic performance direction of the rolling direction of the oriented silicon steel sheets are consistent; and the characteristic of great magnetic performance of the rolling direction of the oriented silicon steel sheets is utilized, the saturation working point can be enhanced and the magnetomotive force produced by the stator current can be increased so that the stator tooth magnetic flux density and the air gap magnetic fluxdensity can be enhanced and the objective of enhancing the thrust density under the unit volume of the linear motor can be achieved.

Description

Technical field: [0001] The invention belongs to the technical field of motors, and specifically relates to a permanent magnet linear motor structure with oriented silicon steel sheets with dual stators and no mover yoke. Background technique: [0002] The iron core linear motor is a winding coil on a silicon steel sheet. It is widely used in high-speed CNC machining center cores, vertical lifting conveyor systems, high-speed ground transportation systems, reciprocating air compressors and other fields. It can provide high rapid response capabilities and move more quickly. Heavy load, and the rigidity can be guaranteed during machining or thrusting. [0003] In the application of this type of motor, thrust density is one of the most important performance indicators. It is hoped that a smaller volume can output higher thrust and at the same time have smaller thrust fluctuations. Therefore, many scholars at home and abroad have focused on how to optimize the thrust performance of th...

AI Technical Summary

Problems solved by technology

Therefore, many scholars at home and abroad focus on how to optimize the thrust performance of this type of linear motor, and propose methods such as concentrated winding structures and high-performance permanent magnets to increase the thrust density, and propose the use of structures such as semi-closed slots, inclined poles or inclined slots, and fractional slots. Reduced thrust fluctuations, but no progress

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