Railway train and double-end transmission permanent magnet motor thereof

Abstract

The invention discloses a railway train and a double-end transmission permanent magnet motor thereof. The double-end transmission permanent magnet motor comprises a rotor structure; a stator structurewhich sleeves the outer side of the rotor structure; a front end cover, a rear end cover and an exhaust fan. A through ventilating duct is axially formed in a base of the stator structure; the frontend of the stator structure is fixedly connected with the front end cover in a sealed mode, an air inlet is formed in the front end cover in the radial direction, and the air inlet is communicated with the ventilating duct; the rear end of the stator structure is fixedly connected with the rear end cover in a sealed mode, an air outlet is formed in the rear end cover in the radial direction, and the air outlet is communicated with the ventilating duct; and the exhaust fan is mounted at the air outlet of the rear end cover. According to the invention, the front end cover, the rear end cover andthe stator structure form the enclosed space of the motor, and the exhaust fan is located outside the enclosed space of the motor, thereby guaranteeing the cleanness of the interior of the motor, andenabling the motor to work more safely and reliably. The air inlet of the front end cover and the air outlet of the rear end cover are both arranged to be of a radial structure, and the requirement of a double-end transmission traction motor for radial air inlet of a driven motor can be met.

Description

technical field [0001] The invention relates to the technical field of low-floor trams, in particular to a railway train and a double-end transmission permanent magnet motor thereof. Background technique [0002] Permanent magnet motors are excited by rare earth permanent magnets, which can generate permanent magnetic fields after being magnetized. Its excitation performance is excellent, so it is superior to electric excitation motors in terms of weight and loss reduction. In recent years, with the rapid development of modern science and technology, the performance and process of electromagnetic materials, especially rare earth electromagnetic materials, have been gradually improved and improved. Coupled with the rapid development of power electronics, power transmission technology, and automatic control technology, the permanent magnet synchronous motor Performance just keeps getting better and better. Furthermore, permanent magnet synchronous motors have the advantages ...

AI Technical Summary

Problems solved by technology

However, this structure will cause poor heat dissipation performance of the motor, resulting in excessive temperature of the permanent magnet in the rotor, which will cause the permanent magnet to lose its magnetism and reduce the service life of the motor.

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