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Corona protecting method of stator winding cable of straight line motor

A linear motor, stator winding technology, applied in the shape/style/structure of winding insulation, electric components, organic insulators, etc., can solve the problems of loss of insulation performance, insulation aging, accelerated cable outer sheath and insulation layer corrosion, etc. Achieve the effect of suppressing local temperature rise, reducing field distortion rate and reducing corona discharge phenomenon

Inactive Publication Date: 2011-09-28
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the probability of corona discharge in the stator winding cable of a linear motor is much smaller than that of the stator bar of a traditional motor, long-term corona discharge will still accelerate the corrosion of the outer sheath and insulation layer of the cable, causing the insulation to age rapidly and lose Its insulating properties

Method used

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  • Corona protecting method of stator winding cable of straight line motor
  • Corona protecting method of stator winding cable of straight line motor
  • Corona protecting method of stator winding cable of straight line motor

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Embodiment Construction

[0011] figure 1 The structural representation of the linear motor stator 3 and the winding cable 4 of the present invention is provided. The specific embodiment of the present invention is to uniformly coat the surface of the cable outer sheath 9 located in the linear motor stator slot and at the slot opening 2 with the first Antihalation paint 10 (see image 3 ), the second anti-halation paint 11 is evenly coated on the surface of the cable outer sheath 9 at the overlapping position 1 of the two-phase cables at the end of the linear motor (see Figure 4 ), wherein the resistivity of the first anti-halation paint 10 is lower than the resistivity of the winding cable outer sheath 9, and the resistivity of the second anti-halation paint 11 is higher than the resistivity of the winding cable outer sheath 9.

[0012] The resistivity value of the first anti-halation paint 10 is about between 2~20Ω·cm, which can be obtained by adding nano-scale Al to the main insulating material o...

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Abstract

The invention discloses an anti-corona method for a stator winding cable of a linear motor, comprising the following steps of: coating first anti-corona varnish with resistivity lower than that of a winding cable outer protective covering on the cable surface of a stator groove and the cable surface of an outlet groove of the linear motor respectively, and coating second anti-corona varnish with resistivity higher than that of the winding cable outer protective covering on the position where two-phase cables are laminated on the end part of the linear motor. The coating of the first anti-corona varnish can ensure that electric field of the cable surface in the stator groove and the cable surface of the outlet groove is evenly distributed, thereby reducing groove electric potential, and reducing occurrence probability of corona on the position; and the second anti-corona varnish can reduce local field intensity of an air gap between adjacent windings, thereby reducing corona discharge of the end part of the motor. The method can be used in the anti-corona processing for the stator winding cable of the linear motor and the anti-corona processing for a high-voltage motor using other cables with similar structures as armature windings.

Description

technical field [0001] The invention relates to an anti-corona method for a linear motor stator winding cable, in particular to an anti-corona method for a linear motor stator winding cable used to drive a high-speed magnetic levitation train. Background technique [0002] The long stator linear motor winding cable is an important part of the drive system of the maglev high-speed train, and it is also a key technology of the high-speed maglev. In conventional motors that utilize high-voltage wire rods as coil windings, corona is one of the main causes of motor winding failure. In the new type of motor using the cable as the winding, the electric field inside the cable is greatly balanced, which effectively improves the electrical insulation performance of the cable. The stator winding cables of linear motors that drive maglev trains mostly adopt the following two structures, one is conductor, inner semiconductive layer, insulating layer, outer semiconductive layer, copper s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B3/40H01B3/00H02K3/40H02K41/02
Inventor 任成燕严萍王珏
Owner TONGJI UNIV
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