Medium voltage winding cable for electric generator, motor and transformer

A winding and cable technology, applied in the field of new electrical materials, can solve the problems of lack of metal shielding and sheath, poor mechanical strength and insufficient flexibility of cables

Active Publication Date: 2008-01-30
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of cross-linked polyethylene as insulation, this kind of cable is not flexible enough. The bending diameter of the cable is about 20 times the outer diameter of the cable, so the use is limited, and there is no protection of metal shielding and sheathing, and the mechanical strength of the cable is poor.

Method used

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  • Medium voltage winding cable for electric generator, motor and transformer
  • Medium voltage winding cable for electric generator, motor and transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Medium Voltage Long Stator Winding Cable Used as Magnetic Suspension

[0020] Rated voltage -10kV

[0021] The conductor is made of 60 annealed aluminum wires, which are divided into 5 layers and twisted tightly. The stranding directions of adjacent layers are opposite, and the compression coefficient is 91%. And annealed in a heating furnace, the conductivity is 62% IACS.

[0022] Conductor shielding and insulating shielding are the same, and the formula components are 90 parts of EPDM, 10 parts of ethylene-vinyl acetate copolymer, 5 parts of lubricant, 2.5 parts of crosslinking agent, 70 parts of conductive carbon black, 1.5 parts of anti-aging agent, 20 parts processing oil. Its volume resistivity at 20°C is 1.0Ω·m, and its elongation at break exceeds 400%.

[0023] The insulation formula components are 90 parts of EPDM, 10 parts of ethylene-vinyl acetate copolymer, 5 parts of lubricant, 2.5 parts of crosslinking agent, 60 parts of calcined clay, 1.5 pa...

Embodiment 2

[0029] Example 2: Winding cable used as a transformer

[0030] Rated voltage -10kV

[0031] The conductors are stranded in 5 layers, the inner two layers are copper round wires, and the outer three layers of aluminum conductors have a Z-shaped section, and the adjacent layers are twisted in opposite directions, and are annealed in a heating furnace.

[0032] Conductor shielding and insulating shielding are the same, and the formula components are 70 parts of EPDM, 30 parts of ethylene-vinyl acetate copolymer, 10 parts of lubricant, 3 parts of crosslinking agent, 90 parts of conductive carbon black, 2 parts of anti-aging agent, 15 parts of processing oil.

[0033] The insulation formula components are 70 parts of EPDM, 30 parts of ethylene-vinyl acetate copolymer, 10 parts of lubricant, 3 parts of crosslinking agent, 80 parts of calcined clay, 2 parts of anti-aging agent, and 15 parts of processing oil.

[0034] The conductive sheath formula consists of 100 parts of rubber, 1...

Embodiment 3

[0036] Example 3: Cables used as generator windings

[0037] Rated voltage -35kV

[0038] The conductor is stranded in 4 layers using soft copper wires, the outer 2 layers of aluminum wires have a tile-shaped cross-section, and the stranding directions of adjacent layers are opposite, and are annealed in a heating furnace.

[0039] Conductor shielding and insulating shielding are the same, and the formula components are 80 parts of EPDM, 20 parts of ethylene-vinyl acetate copolymer, 3 parts of lubricant, 4 parts of crosslinking agent, 60 parts of conductive carbon black, 3 parts of anti-aging agent, 10 parts processing oil.

[0040] The insulation formula consists of 80 parts of EPDM, 20 parts of ethylene-vinyl acetate copolymer, 3 parts of lubricant, 4 parts of crosslinking agent, 70 parts of calcined clay, 3 parts of anti-aging agent, and 10 parts of processing oil.

[0041] The conductive sheath formula consists of 100 parts of rubber, 7 parts of metal oxide active agent,...

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Abstract

The disclosed high flexible medium voltage cable insulated by rubber is a new type electric material. Conductor, conductor screen, insulation, insulation shielding, conductive jacket and conductive coating constitute the cable, which is applicable to winding cables in generators, electromotor (especially, linear motor) and transformer.

Description

technical field [0001] The invention relates to a high-flexibility rubber-insulated medium-voltage cable, which belongs to a new type of electrical material. The invention can be used as winding cables of generators, motors (especially linear motors) and transformers. Background technique [0002] Generators, motors and transformers have been using enameled wire windings for more than 100 years. In recent years, electric motors, generators and transformers have begun to use power cables as windings. This new concept of winding has introduced the high voltage generator (Powerformer TM ), new wind power generation system (Windformer TM ) and new transformers (Dfyformer TM ) and a series of new motors with good development prospects also make it possible for a new high-speed rail transit—maglev train. [0003] At present, the cables used for generators, motors and transformer windings are mostly cross-linked polyethylene insulated cables, which are composed of conductors, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/04H01B7/17H01B3/28H01B3/18H01F27/28H02K3/30
Inventor 张秀松吴祥明刘旌平季世泽黄靖宇王佩龙毛伟杰曾纪刚田义龙
Owner TONGJI UNIV
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