Manufacturing process of braking magnetic pole for linear eddy current braking device

Abstract

The invention discloses a manufacturing process of a brake magnetic pole for a linear eddy current brake device. The manufacturing process comprises the following steps: arranging a thermal shrinkageribbon in a groove at the periphery of an iron core; binding an insulating layer on the periphery of the iron core, so that the thermal shrinkage ribbon is limited in the groove of the iron core; winding a coil outside the insulating layer; arranging a supporting layer on the periphery of the coil, and welding and transferring a welding interface of the thermal shrinkage ribbon into a groove of the iron core; performing thermal shrinkage on the fixed ribbon, fixing the coil, the insulating layer and the supporting layer together and keeping the coil, the insulating layer and the supporting layer at the periphery of the iron core; placing a binding post on one side of the coil, and electrically connecting the end of a cable of the coil with the binding post through a crimping terminal; andputting the product into a glue pouring mold to be subjected to vacuum glue pouring, and conducting curing. According to the invention, the fixing ribbons are placed in the rectangular grooves in theperiphery of the iron core, so that the aluminum flat wire has more winding space, the groove fullness rate is improved, the ampere-turns number is increased, and the net increase of the braking forcereaches 0.2%. The brake magnetic pole manufactured by the method can meet the requirements of a new generation of maglev train.

Description

technical field [0001] The invention belongs to the technical field of rail vehicle braking systems, and in particular relates to a manufacturing process of a braking magnetic pole suitable for a maglev train. Background technique [0002] Existing maglev trains mostly use linear eddy current braking devices for emergency braking. The linear eddy current braking technology uses the magnetic field generated by the energization of the braking magnetic poles to generate eddy currents on the side guide rails under high-speed conditions. The power is finally transmitted to the vehicle bogie through the brake magnetic pole iron core, the magnetic yoke and the tie rod assembly to realize vehicle braking. [0003] The maximum speed of the Shanghai Maglev train is 500km / h. The magnetic pole used for the linear eddy current braking device used on the train has a rated magnetomotive force of 20.4kA for a single pole. Due to the strict limitations of space and weight, the magnetomotiv...

AI Technical Summary

Problems solved by technology

[0005] Thin-film aluminum wire winding coil technology: on the basis of the existing scheme, increase the number of turns and reduce the cross-sectional area of ​​the aluminum film. In this way, the current density of the aluminum wire increases, which is easy to burn out the coil, resulting in brake failure and serious consequences.

Reducing the thickness of the insulating diaphragm can also increase the slot full rate, but the current diaphragm thickness is equivalent to the thickness of the enameled wire paint film, and if the thickness is reduced, the dielectric strength is difficult to guarantee, and it is easy to cause short circuit failure

Aluminum film wire wound coil technology is extremely difficult and challenging in terms of increasing the slot full rate and ampere-turns, both in terms of technical realization possibility and process guarantee feasibility

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