Permanent magnet linear motor

Abstract

The invention is applicable to the field of motors, and provides a permanent magnet linear motor, and the motor comprises a primary side, an armature winding, a permanent magnet and secondary sides, wherein an N pole, an S pole and the armature winding of the permanent magnet are embedded on the primary side; the permanent magnet linear motor depends on secondary magnetic field modulation. The linear induction motor has the advantages of simple structure, non-adhesive direct drive and the like of a conventional linear induction motor, the armature winding and the permanent magnet can realize electromechanical energy conversion between the primary pole and the secondary side by means of the strong coupling modulation effect of the secondary sides, and the electromagnetic thrust of the motoris increased. The secondary sides are made of common magnetic conductive materials, have five topological structures including a stacked barrier modulation type secondary side, an auxiliary cage barstacked barrier type secondary side, an auxiliary stacked barrier concentric cage type secondary, an auxiliary stacked barrier equidistant cage type secondary side and an auxiliary stacked barrier double-layer cage type secondary side, has excellent magnetic field conversion capacity, and is firm, durable, safe, reliable and high in efficiency; and the manufacturing cost can be reduced, so the motor has a good application prospect in the field of rail transit.

Description

technical field [0001] The invention belongs to the field of motors, in particular to a permanent magnet linear motor. Background technique [0002] At present, the traction motors used in rail transit mainly adopt two types: rotary motors and linear motors. Compared with rotary motor drive, the application of linear motor drive in rail transit has significant advantages. [0003] Linear induction motors are a type of linear motors, evolved from rotary motors. The linear induction motor has no conversion device from rotary motion to linear motion, and can directly convert electrical energy into linear mechanical energy. It has the advantages of good acceleration performance and large electromagnetic thrust. With the advantages of small size and non-viscous drive, the rail transit system driven by linear induction motors has been put into practical application in more than 20 lines around the world. [0004] However, the primary and secondary of the linear induction motor ...

AI Technical Summary

Problems solved by technology

[0006] However, in the traditional permanent magnet linear motor, the armature winding is placed on the primary side of the motor, and the permanent magnet arrangement is placed on the secondary side of the motor, which makes the manufacturing and maintenance costs of the permanent magnet linear motor high, which limits the application of permanent magnet linear motors in cities. Applications in long-distance running occasions such as rail transit

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