Manufacturing technology of linear electric machine traction laminated induction board

Abstract

This invention discloses a manufacturing method for linear motor traction laminated inducting boards used in railroads, which processes up and down two rows of holes on a narrow strip along the length direction in distance to be made to laminations then to be stacked to form a secondary iron core, then connects the conducting ends at both sides of the core with a conducting strip in the hole of the secondary coil to prepare a linear motor traction laminated sensing board then processes the top of the sensing board with the railroad as the primary standard, in which, the sensing board increases the action of cutting magnetic force lines by secondary leads and reduces secondary core vortex loss, the performance is prior to the sensing board made of compound materials.

Description

technical field [0001] The invention relates to a manufacturing process of a secondary coil of a linear motor, in particular to a manufacturing process of a linear motor traction laminated induction plate used for railways. Background technique [0002] At present, the transportation system using linear motor traction has been successfully operated in the underground railways of individual cities in China. Compared with traditional DC or AC rotary traction motors, the linear motor transportation system has strong climbing ability, small passing curve radius, low noise, It has many advantages such as energy saving, less wheel-rail wear, no influence of wheel-rail surface adhesion, less maintenance, and reduced operating costs. [0003] Compared with rotating motors of the same capacity, the power factor and efficiency of linear motors are relatively low. Especially for linear motors used for underground railway traction, due to the relatively large structural and installatio...

AI Technical Summary

Problems solved by technology

[0005] First, the induction plate made of composite materials makes the air gap of the linear motor large, the reluctance is large, the secondary eddy current loss is large, and the efficiency and power factor of the linear motor are low;

[0006] Second, in order to ensure the consistency of the size and shape of the induction plate, its dimensional accuracy and geometric tolerance requirements are relatively strict, which increases the difficulty of manufacturing and increases the production cost. In addition, the collision during transportation and warehouse storage can easily damage the induction plate surface and shape;

[0007] Third, use induction plates with strict size and shape to install on sleepers with loose size and shape, and only rely on adjusting the thickness of the gasket under the fastening bolts of the induction plate to ensure the flatness, height and centerline of the induction plate surface, no doubt Increased difficulty and cost of on-site installation;

[0008] Fourth, the induction board produced by the manufacturer can only be short (1.25 meters, 2.5 meters, 5 meters) and linear, and the secondary of the linear motor laid on the subway track with such an induction board will cause its cracks A lot, especially in the curved line segment and the slope line segment, there will be more broken seams between the induction plates, and the distance between the broken seams will be larger

The crack gap of the induction plate cuts off the secondary induced magnetic field and induced current of the linear motor, which increases the excitation current of the linear motor and reduces the efficiency of the linear motor

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