Asymmetric double coil type permanent-magnetic mechanism

A permanent magnet mechanism, double coil technology, applied in circuits, high-voltage air circuit breakers, power devices inside switches, etc., can solve the problem that the peak current of the opening coil increases the burden on the power supply control unit, the design of the control unit is difficult, and the closing The problem of high holding force can achieve the effect of large holding force, increasing closing holding force and reducing current peak value

Inactive Publication Date: 2007-05-30
XI AN JIAOTONG UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive peak current of the opening coil increases the burden on the power supply control unit of the permanent magnet mechanism composed of power electronic devices, causing difficulties in the design of the control unit
Another disadvantage of the existing permanent magnet mechanism with a symmetrical structure of the opening and closing coils is that when the moving iron core is in the closing position, its holding force is close to the holding force of the moving iron core in the opening position, that is, when the moving iron core moves to the left. For the circuit breaker, the closing position requires a high closing holding force due to the need to overcome the reaction force of the contact spring and the reaction spring, while in the opening position, the reaction force is small and the required holding force is very low. There are symmetrical structures where the holding force in two positions cannot match the actual requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Asymmetric double coil type permanent-magnetic mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] Referring to the accompanying drawings, the present invention includes a moving iron core 5 arranged in a casing 6, on which the opening coil 1 and closing coil 3 of different cross-sections are set, and between the opening coil 1 and the closing coil 3 there is a The intermediate magnetic pole composed of permanent magnet 2 and magnetic conductor 4 is provided. Since the intermediate magnetic pole composed of permanent magnet 2 and magnetic conductor 4 is placed below the neutral line in the height direction of the mechanism, it is biased towards the closing coil 3, so that the upper opening coil The occupied magnetic system window and coil cross section of the closing coil are larger than the occupied magnetic system window and coil cross section of the closing coil. Because the magnetic circuits on the upper and lower sides of the middle permanent magnet pole are asymmetrical, the magnetic circuit of the moving iron core is shorter than the symmetrical magnetic circui...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

An asymmetric double coil permanent magnetic unit includes a moving iron core in a case, an open coil and a closing coil sleeved on the core with a mid-magnetic pole in between and the open coil is wider than the closing coil close to the mid-magnetic pole. When the core is at the closing position, the power unit supplies power to the open coil after receiving open signals and the magnetic field force generated by open coil balances the kept closing force, the core drives the breaker to open it to cut off the open coil and remains at the open position relying on the permanent magnetic force. The closing of the breaker depends on the excitation of the closing coil. This invention increases the cross section and turn numbers of the open coil and speeds up its velocity, the asymmetrical paths for right and left of the mid pole increase the closing force generated by the magnet.

Description

technical field [0001] The invention belongs to the field of switching appliances, in particular to a double-coil permanent magnet mechanism with an asymmetrical magnetic circuit structure used for the operation of a vacuum circuit breaker. Background technique [0002] Due to its simple structure and high reliability, the permanent magnet operating mechanism of vacuum circuit breakers introduced in recent years is gradually replacing the existing spring operating mechanism and has been popularized in medium voltage systems. The cross-section of the opening and closing coils of the existing permanent magnet mechanism is the same, and there are two types of permanent magnet operating mechanisms with symmetrical structures: cylindrical and flat. The power supply unit provides the opening and closing excitation of the opening coil and the closing coil. The part includes: the middle magnetic pole composed of permanent magnet and magnetizer; moving iron core and shell. The middl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/666H01H33/38H01H3/28
Inventor 陈德桂游一民
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products