CN2650320Y - Asymmetrical twin coil permanent-magnet mechanism - Google Patents
Asymmetrical twin coil permanent-magnet mechanism Download PDFInfo
- Publication number
- CN2650320Y CN2650320Y CN 200320109735 CN200320109735U CN2650320Y CN 2650320 Y CN2650320 Y CN 2650320Y CN 200320109735 CN200320109735 CN 200320109735 CN 200320109735 U CN200320109735 U CN 200320109735U CN 2650320 Y CN2650320 Y CN 2650320Y
- Authority
- CN
- China
- Prior art keywords
- switch
- coil
- iron core
- closing
- dynamic iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Electromagnets (AREA)
Abstract
An asymmetrical dual coil type permanent magnetic mechanism is provided, which comprises a dynamic iron core arranged in a housing, and a switch-off coil and a switch-on coil suited on the dynamic iron core; a middle magnet pole is arranged between the switch-off coil and the switch-on coil, the width of the switch-off coil is higher than that of the switch-on coil, the middle magnet pole is close to the switch-on coil. When the dynamic iron core is located at the switch-on position, the supply unit provides the power to the switch-off coil after received the switch-off signal, the magnetic force generated by the switch-off coil counteracts the switch-on confining force, the dynamic iron core drives the breaker and switches-off, then the switch-off coil is powered off, the dynamic iron core can be kept at the switch-off position with a permanent magnetic confining force, the switch-on process of breaker depends on the excitation of the switch-on coil, the actuating process is similar to that of the switch-off process. The utility model enlarges the cross section of the switch-off coil and the number of turns of coil; during switch-off process, the switch-off speed is increased, both left and right sides of the middle magnet pole have asymmetrical magnetic pathes, the switch-on confining force generated by the permanent magnet is increased, thereby meeting with the requirements of higher confining force of the permanent magnetic mechanism at the switch-on position.
Description
Technical field
The utility model belongs to the device for switching field, particularly a kind of separating brake and closing coil asymmetric double coil type permanent magnet mechanism that is used for the vacuum circuit-breaker operation.
Background technology
The vacuum circuit-breaker permanent-magnet operating mechanism of Tui Chuing in recent years, because it is simple in structure, the reliability height is progressively replacing existing spring operating mechanism, obtains promoting in medium voltage network.The cross section of the divide-shut brake coil of existing permanent magnet mechanism is identical, the permanent-magnet operating mechanism of symmetrical configuration has drum type brake and flat two kinds, it provides the separating brake of switching winding and closing coil by power supply unit and closes a floodgate excitatoryly, and ferromagnet partly comprises: the consequent pole of being made up of permanent magnet and magnetic conductor; Moving iron core and shell.The consequent pole of existing structure is in the midline position of permanent magnet mechanism, thereby separating brake is identical with the closing coil cross section, the magnetic system symmetrical configuration.If moving iron core is that circuit breaker is in closing position, after the power supply unit of being made up of power electronic device is accepted sub-gate signal, power supply unit is powered to switching winding, the magnetic field force that switching winding produces has been offset closing retention force, makes iron core to left movement, drives circuit breaker and makes its separating brake, switching winding outage then, the moving separating brake position that relies on the permanent magnetism confining force to remain on the left side unshakable in one's determination, the making process of circuit breaker relies on closing coil excitatory, the similar separating brake process of its course of action.Concerning the operation of vacuum circuit-breaker, require from switching characteristic, opening velocity is required than higher, generally speaking, the rate request that arrives 6mm when stroke is 0.8～1.2m/s, then less demanding to closing speed, the omnidistance closing speed of motion is 0.4～0.6m/s, because opening velocity height, thereby require the number of ampere turns of switching winding big, under the certain condition of coil section, have only by strengthening the winding wire footpath, improve the opening velocity that coil current increases circuit breaker, thereby the electric current of the switching winding of the identical divide-shut brake coil permanent magnet mechanism of existing window section is much larger than the electric current of closing coil.Excessive switching winding peak current has increased the burden of the permanent magnet mechanism supply control unit of forming with power electronic device, causes the difficulty in the control unit design.Another shortcoming that the permanent magnet mechanism of existing divide-shut brake coil symmetrical structure exists is: when moving iron core is in closing position, its confining force and moving iron core are in the confining force that the promptly moving iron core in separating brake position moves to the left side and are close, and concerning circuit breaker, closing position is owing to will overcome the counter-force of touch spring and antagonistic spring, requirement closing retention force height, and in the separating brake position, reaction force is very little, the confining force that requires is very low, thereby the confining force of existing symmetrical structure two positions can not require to be complementary with reality.
Summary of the invention
The purpose of this utility model is to provide a kind of electric current that can reduce switching winding, the burden of the power supply unit that reduction is made up of power electronic device, and increase closing retention force, the movement velocity that can add the snap-action iron core in the separating brake process are the asymmetric double coil type permanent magnet mechanism of opening velocity.
For achieving the above object, the technical solution adopted in the utility model is: comprise the moving iron core that is arranged in the housing, on moving iron core, be set with switching winding and closing coil, between switching winding and closing coil, also be provided with the consequent pole that constitutes by permanent magnet and magnetic conductor, be characterized in, the width of switching winding is greater than the width of closing coil, and is partial to closing coil by the consequent pole that permanent magnet and magnetic conductor constitute.
Another characteristics of the present utility model are: the coil turn of switching winding is greater than the coil turn of closing coil.
Because the utility model has strengthened the cross section of switching winding, under coil wire diameter permanence condition, strengthen coil turn, also promptly increase the coil number of ampere turns, thereby in the separating brake process, added snap-action movement velocity, i.e. opening velocity unshakable in one's determination.Because middle permanent magnetism magnetic pole left and right sides magnetic circuit is asymmetric, moving magnetic circuit when closing position unshakable in one's determination is short than symmetrical magnetic circuits, has strengthened the closing retention force that permanent magnetism produces, and has satisfied permanent magnet mechanism in the big requirement of closing position confining force.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
Embodiment
Referring to accompanying drawing, the utility model comprises and is arranged on moving unshakable in one's determination 5 in the housing 6, on moving unshakable in one's determination 5, be set with the switching winding 1 and the closing coil 3 of different cross section, between switching winding 1 and closing coil 3, also be provided with the consequent pole that constitutes by permanent magnet 2 and magnetic conductor 4, the thickness of switching winding 1 is greater than the thickness of closing coil 3, and is partial to closing coil 3 by the consequent pole that permanent magnet 2 and magnetic conductor 4 constitute.
Operation principle of the present utility model is as follows: if moving iron core 5 is that circuit breaker is in closing position, after the power supply unit of being made up of power electronic device is accepted sub-gate signal, power supply unit is to switching winding 1 power supply, the magnetic field force that switching winding 1 produces has been offset closing retention force, make unshakable in one's determination 5 to left movement, drive circuit breaker and make its separating brake, switching winding 1 outage then, moving unshakable in one's determination 5 rely on the permanent magnetism confining force to remain on the separating brake position on the left side, the making process of circuit breaker relies on closing coil 3 excitatory, the similar separating brake process of its course of action.
To a rated voltage is 12KV, and rated current is 1250A, and drop-out current is that the asymmetric and two kinds of structures of symmetric coil of the indoor permanent magnet mechanism of vacuum circuit-breaker of 20KA design, and makes model machine, to two kinds of mechanism's dynamic characteristic result of calculations as shown in Table 1 and Table 2.
The asymmetric opening characteristic with symmetric coil of table 1 compares
| Form | d(mm) | N (circle) | R(Ω) | I(A) | V 1 minute(m/s) | V 2 minutes(m/s) |
| Asymmetric | 0.67 | 1073 | 13.86 | 5.86 | 0.91 | 1.00 |
| 0.75 | 825 | 8.51 | 7.8 | 1.01 | 1.11 | |
| 0.8 | 744 | 6.74 | 8.77 | 1.05 | 1.16 | |
| 0.9 | 588 | 4.21 | 11.45 | 1.15 | 1.28 |
| Symmetry | 0.67 | 925 | 11.95 | 6.74 | 0.93 | 1.02 |
| 0.75 | 726 | 7.49 | 8.84 | 1.02 | 1.13 | |
| 0.8 | 651 | 5.9 | 10.0 | 1.07 | 1.19 | |
| 0.9 | 532 | 3.81 | 12.46 | 1.17 | 1.30 |
The combined floodgate characteristic of table 2 asymmetric coils and symmetric coil relatively
| Form | d(mm) | N (circle) | R(Ω) | I(A) | V 1 closes(m/s) | V 2 close(m/s) |
| Asymmetric | 0.58 | 1050 | 18.1 | 5.31 | 1.03 | 0.45 |
| 0.62 | 920 | 13.89 | 6.23 | 1.12 | 0.51 | |
| 0.67 | 814 | 10.52 | 7.28 | 1.2 | 0.57 | |
| Symmetry | 0.58 | 1218 | 21 | 4.53 | 1.02 | 0.44 |
| 0.62 | 1080 | 16.29 | 5.23 | 1.09 | 0.5 | |
| 0.67 | 925 | 11.95 | 6.3 | 1.17 | 0.56 |
D in the table (mm) is the line footpath of coil, and N (circle) is the number of turn of coil, and R (Ω) is the D.C. resistance of coil, and I (A) is the peak current of divide-shut brake coil, V
1 minute(m/s) be the opening velocity of moving contact when just dividing 6mm of vacuum circuit-breaker; V
2 minutes(m/s) be the average opening velocity of the moving contact separating brake overall process of vacuum circuit-breaker; V
1 closes(m/s) be the moving contact of the vacuum circuit-breaker closing speed during 6mm before just closing; V
2 close(m/s) be the average closing speed of the switch on of moving contact overall process of vacuum circuit-breaker.
From table 1 data as can be seen: two kinds of structures are compared, and under the same terms of the online footpath of unsymmetric structure, because the number of turn increases, under the basic permanence condition of opening velocity, the separating brake current peak has reduced.For example line taking footpath d=0.75mm compares, and asymmetric coils is because the switching winding window section is big, and the number of turn is 825 circles, and only can be around 726 circles to symmetrical structure.At opening velocity V
1 minuteAnd V
2 minutesBasically under the permanence condition, asymmetric coils separating brake electric current I=7.8A, symmetrical structure is I=8.84A then, and visible switching winding current peak has descended.Can find out from table 2 data: two kinds of structures are compared, and under the same terms of the online footpath of unsymmetric structure, because the closing coil number of turn reduces, under the basic permanence condition of closing speed, the switching current peak value has increased.For example, line taking footpath d=0.62mm compares, and asymmetric coils is because the closing coil window section diminishes, and the number of turn is the N=920 circle, at closing speed V
1 closesAnd V
1 closesBasically under the permanence condition, asymmetric coils switching current I=6.23A, symmetrical structure is I=5.23A then.Although switching current employing unsymmetric structure can be bigger than symmetry, but because the separating brake current peak is always greater than switching current, also be that power supply maximum load current peak value is decided by the branch brake current, even, be to have descended to the maximum load current peak value of power supply but adopt unsymmetric structure so peak switching current increases to some extent.
Adopt unsymmetric structure can strengthen closing retention force, table 3 shows the comparison of two kinds of structure confining forces.
The asymmetric comparison with the symmetrical structure closing retention force of table 3
| Form | Closing retention force F (N) |
| Asymmetric | 2820 |
| Symmetry | 2745 |
Branch, combined floodgate attribute testing that table 4 shows asymmetric coils and two kinds of structure model machines of symmetric coil compare.
The branch of table 4 asymmetric coils and symmetric coil, combined floodgate attribute testing are relatively
(the charging voltage U=110V of capacitor)
| Form | Deciliter state | d(mm) | N (circle) | R(Ω) | I(A) | V 1 minute(m/s) | V 1 minute(m/s) |
| Asymmetric | Separating brake | 0.75 | 825 | 8.02 | 8.3 | 0.98 | - |
| Close a floodgate | 0.62 | 920 | 13.04 | 6.7 | - | 0.48 | |
| Symmetry | Separating brake | 0.75 | 726 | 7.01 | 9.12 | 0.99 | - |
| Close a floodgate | 0.75 | 726 | 7.12 | 8.52 | - | 0.63 |
As can be seen from Table 4, result of the test and result of calculation are basic identical.
Claims (2)
1, a kind of asymmetric double coil type permanent magnet mechanism, comprise the moving iron core [5] that is arranged in the housing [6], on moving [5] unshakable in one's determination, be set with switching winding [1] and closing coil [3], between switching winding [1] and closing coil [3], also be provided with the consequent pole that constitutes by permanent magnet [2] and magnetic conductor [4], it is characterized in that: the width of said switching winding [1] is greater than the width of closing coil [3], and the consequent pole deflection closing coil [3] that is made of permanent magnet [2] and magnetic conductor [4].
2, asymmetric double coil type permanent magnet mechanism according to claim 1, it is characterized in that: the coil turn of said switching winding [1] is greater than the coil turn of closing coil [3].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320109735 CN2650320Y (en) | 2003-11-07 | 2003-11-07 | Asymmetrical twin coil permanent-magnet mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320109735 CN2650320Y (en) | 2003-11-07 | 2003-11-07 | Asymmetrical twin coil permanent-magnet mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2650320Y true CN2650320Y (en) | 2004-10-20 |
Family
ID=34343373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320109735 Expired - Fee Related CN2650320Y (en) | 2003-11-07 | 2003-11-07 | Asymmetrical twin coil permanent-magnet mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2650320Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319095C (en) * | 2003-11-07 | 2007-05-30 | 西安交通大学 | Asymmetric double coil type permanent-magnetic mechanism |
| CN101256919B (en) * | 2007-04-24 | 2010-05-19 | 上海电器股份有限公司人民电器厂 | Asymmetry parallel excitation type bistable state permanent magnet control mechanism |
| CN101789318A (en) * | 2010-03-30 | 2010-07-28 | 西安交通大学 | Novel bistable permanent magnetic actuator capable of increasing instantaneous opening speed |
-
2003
- 2003-11-07 CN CN 200320109735 patent/CN2650320Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319095C (en) * | 2003-11-07 | 2007-05-30 | 西安交通大学 | Asymmetric double coil type permanent-magnetic mechanism |
| CN101256919B (en) * | 2007-04-24 | 2010-05-19 | 上海电器股份有限公司人民电器厂 | Asymmetry parallel excitation type bistable state permanent magnet control mechanism |
| CN101789318A (en) * | 2010-03-30 | 2010-07-28 | 西安交通大学 | Novel bistable permanent magnetic actuator capable of increasing instantaneous opening speed |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202217627U (en) | Magnetic latching relay | |
| CN104733230A (en) | Permanent magnet intelligent contactor having electromagnetic controllable counterforce and capable of guaranteeing normal switching-off | |
| CN202977311U (en) | Electromagnetic relay and switching device | |
| CN2650320Y (en) | Asymmetrical twin coil permanent-magnet mechanism | |
| CN1319095C (en) | Asymmetric double coil type permanent-magnetic mechanism | |
| CN2904231Y (en) | Reverse instantaneous watt consumption electromagnetic electric appliance | |
| CN1201355C (en) | Drive devices for interrupter units in power supply switching devices | |
| CN2877026Y (en) | Two-state magnetoelectric AC relay | |
| CN102013355B (en) | Control method for prolonging service life of permanent magnet driven vacuum circuit breaker | |
| CN2706856Y (en) | Low-interference electromagnetic relay | |
| CN1252758C (en) | Permanent Magnet Operating Mechanism | |
| CN2614378Y (en) | Energy-saving electromagnetic switch | |
| CN206210716U (en) | A kind of motor-driven two phase relay | |
| CN110085487B (en) | Novel permanent-magnet electromagnetic relay | |
| CN115547743A (en) | Bidirectional rotary electromagnetic operating mechanism | |
| CN212625400U (en) | Novel magnetic latching relay structure | |
| CN2251780Y (en) | Half-hard magnet electromagnet and control circuit thereof | |
| CN2684356Y (en) | Push and pull type bistable permanent-magnet operating mechanism | |
| CN103377857B (en) | Electromagnetic relay and switching device | |
| CN2626035Y (en) | Monostable permanent-magnetic operating mechanism having manual gate-disbranch magnetic short circuit ring equipment | |
| CN201302957Y (en) | Multi-coil electromagnetic system of electromagnetic relay | |
| CN217955766U (en) | Relay with series and parallel contacts controlled by double electromagnetic loops | |
| CN203406226U (en) | Permanent magnetism vacuum circuit breaker | |
| CN2456280Y (en) | Permenant magnet operating mechanism | |
| CN215118812U (en) | Switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |