CN1319095C - Asymmetric double coil type permanent-magnetic mechanism - Google Patents
Asymmetric double coil type permanent-magnetic mechanism Download PDFInfo
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- CN1319095C CN1319095C CNB2003101058961A CN200310105896A CN1319095C CN 1319095 C CN1319095 C CN 1319095C CN B2003101058961 A CNB2003101058961 A CN B2003101058961A CN 200310105896 A CN200310105896 A CN 200310105896A CN 1319095 C CN1319095 C CN 1319095C
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- switching
- coil
- magnetic
- iron core
- movable iron
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- 238000004804 winding Methods 0.000 claims abstract description 32
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000004020 conductor Substances 0.000 claims description 6
- 230000005389 magnetism Effects 0.000 abstract description 7
- 230000005284 excitation Effects 0.000 abstract 1
- 230000014759 maintenance of location Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000002964 excitative effect Effects 0.000 description 2
- 230000003042 antagnostic effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Abstract
The present invention relates to an asymmetric double coil type permanent-magnetic mechanism which comprises a movable iron core and a switching off coil, a switching on coil and an intermediate magnetic pole, wherein the movable iron core is arranged in the shell; the switching off coil and the switching on coil are sheathed on the movable iron core; the intermediate magnetic pole is arranged between the switching off coil and the switching on coil; the width of the switching off coil is larger than the width of the switching on coil; the intermediate magnetic pole deflects towards the switching on coil. When the movable iron core is in the switching on position, after a power supply unit receives switching off signals, the switching off coil supplies power, and magnetic force generated by the switching off coil counteracts switching on retentivity; the movable iron core drives a circuit breaker and leads the circuit breaker to realize switching off; then, the switching off coil realizes power failure. The movable iron core is maintained in the switching off position by means of permanent-magnetic retentivity, and the switching on course of the circuit breaker realizes excitation by means of the switching on coil; the action course is similar to the switching off course. The asymmetric double coil type permanent-magnetic mechanism enlarges the cross section and the number of windings of the coils of the switching off coil and accelerates switching off speed in the switching off course; because magnetic paths on the left side and the right side of the intermediate magnetic pole are asymmetrical, switching on retentivity generated by permanent magnetism is enlarged, and the requirement that the permanent-magnetic mechanism has large retentivity in the switching on position is met.
Description
Technical field
The invention belongs to the device for switching field, particularly a kind of twin coil formula permanent magnet mechanism that is used for the asymmetric magnetic structure of 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 object of the present invention 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 twin coil formula permanent magnet mechanism of the asymmetric magnetic structure of opening velocity.
For achieving the above object, the technical solution used in the present invention 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 placement location of consequent pole departs from the center line of mechanism height direction and is partial to closing coil one side, up and down the magnetic circuit on both sides is asymmetric to make consequent pole, the below magnetic circuit of encirclement closing coil surrounds the top magnetic circuit of switching winding and will lack, the window of top switching winding is greater than the window of below closing coil, make the cross section and the number of turn of switching winding, greater than the cross section and the number of turn of closing coil.
Because the present invention has strengthened the cross section of switching winding, under coil wire diameter permanence condition, strengthen the switching winding number of turn, also promptly increased the switching winding number of ampere turns, compare with the permanent magnet mechanism of symmetrical magnetic circuits structure, under opening velocity the same terms, can reduce the current peak of switching winding in the separating brake process, alleviate the burden of permanent magnet mechanism power pack power electronic device.Because the both sides magnetic circuit is asymmetric up and down for middle permanent magnetism magnetic pole, 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 invention.
Embodiment
Referring to accompanying drawing, the present invention includes and be 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, because the consequent pole that permanent magnet 2 and magnetic conductor 4 constitute is positioned over the position of being partial to closing coil 3 below the mechanism height direction neutral line, the shared magnetic system window of switching winding and coil section are greater than the shared magnetic system window and the coil section of closing coil above making.Because the both sides magnetic circuit is asymmetric up and down for middle permanent magnetism magnetic pole, moving magnetic circuit when closing position unshakable in one's determination is short than symmetrical magnetic circuits.
Operation principle of the present invention 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 move upward, 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 of top, the making process of circuit breaker relies on closing coil 3 excitatory, the similar separating brake process of its course of action, the moving closing position that relies on the permanent magnetism confining force to remain on the below unshakable in one's determination.
To a rated voltage is 12KV, rated current is 1250A, drop-out current is that the asymmetric and two kinds of structures of the twin coil formula symmetrical magnetic circuits structure 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 opening characteristic of table 1 unsymmetric structure and symmetrical structure relatively
| Form | d(mm) | N (circle) | R(Ω) | I(A) | V 1 minute(m/s ) | V 2 minutes(m/s) |
| 0.67 | 1073 | 13.86 | 5.86 | 0.91 | 1.00 |
| Asymmetric | 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 symmetrical structure only can be around 726 circles.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 |
Table 4 shows the opening characteristic test of asymmetric magnetic circuit and two kinds of structure model machines of symmetrical magnetic circuits and compares.
The branch test of table 4 unsymmetric structure and symmetrical structure relatively
(the charging voltage U=110V of capacitor)
| Form | d(mm) | The N circle) | R(Ω) | I(A) | V 1 minute(m/s) |
| Asymmetric | 0.75 | 825 | 8.02 | 8.3 | 0.98 |
| Symmetry | 0.75 | 726 | 7.01 | 9.12 | 0.99 |
As can be seen from Table 4, result of the test and result of calculation are basic identical.
Claims (1)
- A kind of twin coil formula permanent magnet mechanism of asymmetric magnetic structure, 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 placement location of the consequent pole that is made of permanent magnet [2] and magnetic conductor [4] departs from the center line of mechanism height direction and is partial to closing coil [3] one sides, up and down the magnetic circuit on both sides is asymmetric to make consequent pole, the below magnetic circuit of encirclement closing coil surrounds the top magnetic circuit of switching winding and will lack, the window of top switching winding [1] is greater than the window of below closing coil [3], make the cross section and the number of turn of switching winding [1], greater than the cross section and the number of turn of closing coil [3].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101058961A CN1319095C (en) | 2003-11-07 | 2003-11-07 | Asymmetric double coil type permanent-magnetic mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101058961A CN1319095C (en) | 2003-11-07 | 2003-11-07 | Asymmetric double coil type permanent-magnetic mechanism |
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| CN1542883A CN1542883A (en) | 2004-11-03 |
| CN1319095C true CN1319095C (en) | 2007-05-30 |
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| CNB2003101058961A Expired - Lifetime CN1319095C (en) | 2003-11-07 | 2003-11-07 | Asymmetric double coil type permanent-magnetic mechanism |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109058B (en) * | 2009-12-25 | 2015-03-25 | 浙江三花制冷集团有限公司 | Bistable state electromagnetic valve and method for manufacturing same |
| CN101789318B (en) * | 2010-03-30 | 2012-05-23 | 西安交通大学 | Novel bistable permanent magnetic actuator capable of increasing instantaneous opening speed |
| CN104347310B (en) * | 2014-08-22 | 2017-01-11 | 重庆大学 | Permanent magnet spring mechanism switch of divided conductor power transmission line ice melting device |
| CN105374617A (en) * | 2015-11-26 | 2016-03-02 | 国家电网公司 | Coal mine explosion-proof enclosed split-phase direct-driven vacuum circuit breaker |
| CN111415830B (en) * | 2020-02-25 | 2022-03-29 | 平高集团有限公司 | Electromagnetic repulsion force operating mechanism and switch using same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1381855A (en) * | 2002-05-23 | 2002-11-27 | 江苏东源电器集团股份有限公司 | Permanent-magnet manipulating mechanism |
| CN2650320Y (en) * | 2003-11-07 | 2004-10-20 | 西安交通大学 | Asymmetrical twin coil permanent-magnet mechanism |
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2003
- 2003-11-07 CN CNB2003101058961A patent/CN1319095C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1381855A (en) * | 2002-05-23 | 2002-11-27 | 江苏东源电器集团股份有限公司 | Permanent-magnet manipulating mechanism |
| CN2650320Y (en) * | 2003-11-07 | 2004-10-20 | 西安交通大学 | Asymmetrical twin coil permanent-magnet mechanism |
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| Publication number | Publication date |
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| CN1542883A (en) | 2004-11-03 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20041103 Assignee: Changshu Switchgear Mfg. Co.,Ltd.(Former Changshu Switchgear Plant) Assignor: Xi'an Jiaotong University Contract record no.: 2013610000022 Denomination of invention: Asymmetric double coil type permanent-magnetic mechanism Granted publication date: 20070530 License type: Common License Record date: 20130423 |
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Granted publication date: 20070530 |
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