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Built-in type permanent-magnet linear motor

A permanent magnet linear motor, built-in technology, applied in electrical components, electromechanical devices, electric components, etc., can solve the problems affecting the application of permanent magnet linear motors, the suspension force of permanent magnets and the low weight of the secondary pole, etc., and achieve variable speed operation performance. Good, good running performance, wide speed range effect

Inactive Publication Date: 2006-12-27
SOUTHEAST UNIV
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Problems solved by technology

[0005] The application of permanent magnet linear motors is becoming more and more widespread, because our country is a big country of rare earth permanent magnet materials. Permanent magnet materials provide high-density magnetic energy products, replacing coil structures, making the structure simple, but the levitation force provided by permanent magnets and the weight of secondary poles relatively low, which affects the application of permanent magnet linear motors

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  • Built-in type permanent-magnet linear motor
  • Built-in type permanent-magnet linear motor

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Embodiment Construction

[0017] Although permanent magnet linear motors are used in machine tool control systems, ordinary permanent magnet linear motors cannot provide a magnetic field that is sinusoidally distributed along the space on the secondary pole, so the harmonic magnetic field will generate harmonic levitation force, causing the linear motor to fluctuate , affecting the running performance of the linear motor. In order to break this limitation, we propose a new type of permanent magnet motor with multi-winding and Halbach permanent magnet rotor, such as figure 1 As shown, the primary winding passes through the three-phase current to generate a traveling wave magnetic field, which generates a traction force on the secondary, prompting the secondary pole to move. Halbach permanent magnet, its magnetization direction according to figure 2 Arranged, so it can generate a sinusoidally distributed magnetic field in space. It generates a strong magnetic field above the magnet, and a weaker magne...

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Abstract

The built-in permanent magnetic linear motor comprises: a primary iron core (1) and coiling (2) opposite to (4), a secondary Halbach permanent magnet (3) opposite to (1) and iron core (4), and the pole shoes (5) on (3) to hold some gap with (1), wherein the magnetizing direction for (3) is clockwise and rotated every 90deg. This invention releases load of compensation system, and has wide application.

Description

technical field [0001] The invention is a novel permanent magnet linear motor that can be applied to high-speed trains, numerical control machine tools, and magnetic levitation launches, and realizes no contact and friction between the stator and moving parts, and belongs to the technical field of linear motor manufacturing. technical background [0002] The linear motor magnetic levitation technology is based on the interaction of electromagnetic force between the stator (primary pole) and the rotor (secondary pole). This interaction force is divided into the force in the traction direction and the force in the levitation direction. The levitation force is mainly provided by the magnetic field of the secondary pole, and the traction force is mainly formed by the magnetic field generated by the three-phase current of the primary pole winding. [0003] High-speed maglev trains are one example of the application of linear motors. The high-speed maglev train is powered by a la...

Claims

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Application Information

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IPC IPC(8): H02K41/02
Inventor 余海涛胡敏强郑建勇秦申蓓
Owner SOUTHEAST UNIV
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