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Rare-earth magnetostrictive magnetic drive switch gear for electric power systems

A power system and switchgear technology, applied in the field of rare earth magnetostrictive power system magnetic drive switchgear, can solve the problems of high-frequency oscillating impact current and overvoltage, switching time cannot be controlled, etc., and achieve accurate and controllable switching time , large displacement and large, high-precision effects

Inactive Publication Date: 2010-02-17
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the deficiencies of the above-mentioned prior art, and proposes a rare-earth magnetostrictive power system magnetically driven switch device, which uses a magnet to produce a mechanism of telescopic switch effect caused by rotation or movement or elongation under the action of a magnetic field. And the size of the switch displacement and switch force generated is controllable, the precision of the opening and closing displacement can reach the micron level, the switching time is accurate and the error is in the millisecond level, especially it is easy to generate instantaneous and accurate large displacement and large switch stress, which solves the problem of Due to the uncontrollable switching time, high-frequency oscillation occurs in the circuit, resulting in the problem of inrush current and overvoltage

Method used

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  • Rare-earth magnetostrictive magnetic drive switch gear for electric power systems
  • Rare-earth magnetostrictive magnetic drive switch gear for electric power systems
  • Rare-earth magnetostrictive magnetic drive switch gear for electric power systems

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, this embodiment includes: a vacuum contactor 26, a contact opening and closing spring 25, a magnetically driven telescopic mechanism 22, and a base frame 23. The magnetically driven telescopic mechanism 22 is a permanent magnet telescopic mechanism, wherein: the vacuum contactor 26 includes an upper The contact 26-1, the lower contact 26-2, the ceramic vacuum bag 26-3, the upper contact 26-1 is set inside the ceramic vacuum bag 26-3, and the lower contact 26-2 is placed in the ceramic vacuum bag 26-3 Inside, one end of the lower contact 26-2 is connected to the telescopic end of the permanent magnet telescopic mechanism, and the contact opening and closing spring 25 is set on one end of the lower contact 26-2, and placed in the ceramic vacuum bag 26-3 and the permanent magnet telescopic mechanism. Between the mechanisms, the basic frame 23 is a rigid cuboid, the outer wall of the ceramic vacuum bag 26-3 is fixed on one end of the basic frame 2...

Embodiment 2

[0039] Such as figure 2 As shown, the overall structure of this embodiment is the same as that of Embodiment 1, and the magnetically driven telescopic mechanism 22 is still a permanent magnet telescopic mechanism. The difference between this embodiment and the embodiment is that the upper contact 26 of the vacuum contactor 26- The initial state between 1 and the lower contact 26-2 is closed, the permanent magnet stretch mechanism is connected with the lower contact of the vacuum contactor through the frame body 21, and the middle part of the first housing 5 of the permanent magnet stretch mechanism is fixedly connected to the base frame 23, the permanent magnet expansion mechanism is placed in the frame body 21, the outer end surface of the upper displacement output rod 6 of the permanent magnet expansion mechanism is fixedly connected with the upper end cover 10 of the first housing 5, and the lower displacement output rod 7 of the permanent magnet expansion mechanism It is ...

Embodiment 3

[0043] Such as figure 1 , 6 As shown, this embodiment includes: a vacuum contactor 26, a contact opening and closing spring 25, a magnetically driven telescopic mechanism 22, and a base frame 23. The magnetically driven telescopic mechanism 22 is a rare earth magnetostrictive mechanism, wherein the vacuum contactor 26 includes The upper contact 26-1, the lower contact 26-2, the ceramic vacuum bag 26-3, the upper contact 26-1 is set inside the ceramic vacuum bag 26-3, and the lower contact 26-2 is placed in the ceramic vacuum bag 26- 3 Inside, one end of the lower contact 26-2 is connected with the retractable end of the rare earth magnetostrictive mechanism, the lower contact 26-2 can move up and down, the outer wall of the ceramic vacuum bag 26-3 is fixedly connected with the basic frame 23, and the contact opens The closing spring 25 is sleeved on one end of the lower contact 26-2, and placed between the ceramic vacuum bag 26-3 and the rare-earth magnetostrictive mechanism,...

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Abstract

The invention relates to a rare-earth magnetostrictive magnetic drive switch gear for electric power systems, which belongs to the technical field of power transmission. The switch gear comprises a vacuum contactor, a contact opening-closing spring, a magnetostrictive mechanism and a basic frame, wherein the vacuum contactor comprises an upper contact, a lower contact and a ceramic vacuum bag; theupper contact is arranged at the upper part of the ceramic vacuum bag, and the lower contact is arranged at the lower part of the ceramic vacuum bag; the lower contact is connected with a retractableend of the magnetostrictive mechanism; the contact opening-closing spring is sheathed on one end of the lower contact and arranged between the ceramic vacuum bag and the magnetostrictive mechanism; the basic frame forms a rigid cuboid; the outer wall of the ceramic vacuum bag is fixed at one end of the basic frame; and the magnetostrictive mechanism is fixed in the basic frame. Under the action of a magnetic field, the magnet rotates, extends or moves to form a mechanism with the effect of a retractable switch; and the magnitudes of the produced switch displacement and the switch force are controllable, the precision for the opening and closing displacement is high, and the time for opening and closing is accurate and controllable.

Description

[0001] The present invention is a divisional patent application with the patent application number: 200810032740.8, the patent application name: "Magnetic drive switch device for electric power system", the patent applicant: Shanghai Jiaotong University, and the patent application date: January 17, 2008. technical field [0002] The invention relates to a device in the field of electric power technology, in particular to a rare-earth magnetostrictive power system magnetic drive switch device. Background technique [0003] As a complete set of power distribution devices for power systems and basic unit devices for switch cabinets, some switch systems used in the power industry, such as high and low voltage vacuum contact switch systems, are currently widely used in metallurgy, mining, petrochemical, construction and other departments and In the power distribution system of factories and mines, it is used to control the load power equipment from hundreds of volts to tens of tho...

Claims

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Application Information

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IPC IPC(8): H01H55/00H01H33/66
Inventor 杨斌堂孟光
Owner SHANGHAI JIAO TONG UNIV