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Pulse-overvoltage-suppressing high voltage feed cable with embedded magnetic ring

A feeder cable, overvoltage technology, applied in power cables, bendable cables, insulated cables, etc., can solve the problems of non-repetitive pulse overvoltage suppression, system electromagnetic interference, etc., to avoid electromagnetic interference, prolong service life, The effect of suppressing spectral components

Active Publication Date: 2017-02-22
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the problem that the common feeder cable in the prior art cannot effectively suppress the repetitive pulse overvoltage, resulting in serious electromagnetic interference in the system

Method used

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  • Pulse-overvoltage-suppressing high voltage feed cable with embedded magnetic ring
  • Pulse-overvoltage-suppressing high voltage feed cable with embedded magnetic ring
  • Pulse-overvoltage-suppressing high voltage feed cable with embedded magnetic ring

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Embodiment Construction

[0040] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0041] Such as figure 1 As shown, the pulse overvoltage suppression high-voltage feeder cable with embedded magnetic ring provided in this embodiment includes a cable core 1, an inner insulating layer 2, an outer insulating layer 3, a metal protective sheath 4 and rubber The sheath 5 and the outer insulating layer 3 are embedded with a magnetic ring 6; the embedded magnetic ring 6 is pressed by magnetic powder and insulating material 7 to produce a filter circuit; wherein, the cable core 1 is a cable used for ordinary feeder cables. The core conductor and the magnetic powder have a preset relative magnetic permeability, and the relative magnetic permeability of the magnetic powder ranges from 100...

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Abstract

The invention relates to the technical field of cable equipment, and particularly relates to a pulse-overvoltage-suppressing high voltage feed cable with an embedded magnetic ring. The pulse-overvoltage-suppressing high voltage feed cable with the embedded magnetic ring comprises a cable core, an inner insulating layer, an outer insulating layer, a metal protective sleeve and a rubber sheath which are nested in sequence from inside to outside, wherein a magnetic ring is embedded in the outer insulating layer; and the embedded magnetic ring is prepared from magnetic powder and an insulating material in a pressing manner to generate a filtering circuit, wherein the magnetic powder has preset magnetic conductivity. According to the pulse-overvoltage-suppressing high voltage feed cable with the embedded magnetic ring, the magnetic ring is embedded in the outer insulating layer on the basis of a common feed cable to form the filtering circuit; and the filtering circuit can effectively suppress repeated pulse overvoltage to suppress frequency spectrum component which can cause overvoltage pulse, so as to avoid a severe electromagnetic interference phenomenon of the system and to further avoid accumulative damage to a high-power device, a motor and a cable of the system, so that the service life is prolonged consequently.

Description

technical field [0001] The invention relates to the technical field of cable equipment, in particular to a pulse overvoltage suppression high-voltage feeder cable embedded with a magnetic ring. Background technique [0002] Due to its excellent speed regulation performance, high safety and reliability, high equipment utilization rate and good power saving effect, frequency conversion speed regulation technology is widely used in electric drives in rail transit and other fields. A notable feature of the application of power transmission to rail transit is large capacity (greater than 10MW) and high voltage (higher than 20kV), which usually requires the use of large-capacity high-voltage feeder cables to realize power transmission. However, ordinary large-capacity high-voltage feeder cables transmit the pulse voltage output by the power electronic components of the frequency converter, which will cause repetitive pulse overvoltage problems, because the rising edge of the pulse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/18H01B7/04H01B7/02H01B9/00
CPCH01B7/0216H01B7/04H01B7/18H01B9/00
Inventor 黄靖宇唐章宏李君王群曹强高阳张龙陈恒王东洲尚立威张严生汪鹏
Owner TONGJI UNIV
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