Linear motor with controllable magnetic field type primary permanent magnet structure for city railway train

Abstract

The invention discloses a linear motor with a controllable magnetic field type primary permanent magnet structure for a city railway train, comprising a primary pole (1) and a secondary pole (2). Theprimary pole (1) and the secondary pole (2) both adopt a salient pole structure, wherein the primary pole (1) comprises a permanent magnet (3), an armature winding (4), an excitation winding (5) and aprimary iron core (6); the secondary pole (2) comprises a secondary iron core (7); the permanent magnet (3) is arranged in the primary iron core (6) on the primary pole (1), the armature winding (4)is a concentrated winding to be wound on teeth of the primary iron core (6), and the excitation winding (5) is wound on the teeth of the primary iron core (6); the primary pole (1) is arranged on thetrain; and the secondary pole (2) is a magnetoconductivity steel rail arranged on a rail of the train. The invention has the magnetic field regulation capacity, can lower the rail traffic cost, enhance the motor efficiency, and has very high theoretical and practical values.

Description

technical field [0001] The invention relates to the fields of electrician, motor and rail transit, in particular to a novel hybrid excitation linear motor suitable for urban rail transit. Background technique [0002] With the acceleration of urbanization and the density of urban buildings, urban rapid rail transportation tools such as subways and light rails play an important role in the sustainable development of cities with their advantages of low energy consumption, less pollution, and punctuality. As the requirements for the safety, speed and comfort of rail vehicles are getting higher and higher, the performance of traction motors driving rail transit trains is also required to be higher, and the research in this field has also been related. Scholars are increasingly paying attention. [0003] In terms of technology, electrified urban rail traction motors can mainly adopt two technical approaches: rotary motors and linear motors. Urban rail trams using linear motors ...

AI Technical Summary

Problems solved by technology

Then, there is an important problem in the three main primary permanent magnet linear motor structures that appear at present, that is, the unipolar flux pulsation type, the bipolar flux switching type, and the bipolar flux reversal type, that is, the magnetic field It is produced by a single magnetic source of permanent magnets, and cannot be adjusted in time and quickly according to the requirements of train operation performance

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