CN202473642U - Bistable dissymmetrical permanent magnet operating mechanism - Google Patents
Bistable dissymmetrical permanent magnet operating mechanism Download PDFInfo
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- CN202473642U CN202473642U CN 201220077726 CN201220077726U CN202473642U CN 202473642 U CN202473642 U CN 202473642U CN 201220077726 CN201220077726 CN 201220077726 CN 201220077726 U CN201220077726 U CN 201220077726U CN 202473642 U CN202473642 U CN 202473642U
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- iron core
- permanent magnet
- outer yoke
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Abstract
The utility model relates to a bistable dissymmetrical permanent magnet operating mechanism for a large current vacuum generator circuit breaker. The structure is as follows: an outer yoke is arranged between a lower end cover and an upper cover; an active iron core is arranged in the cavity of the outer yoke and the active iron core is a variable cross-section cylinder; a connecting rod is fixed on the active iron core; and a closing coil, a permanent magnet ring, a magnetizer block and a separating break coil are sequentially arranged between the outer yoke and the active iron core from the lower end cover to the upper end cover. By utilizing the bistable state dissymmetrical permanent magnet operating mechanism, the heat loss is greatly lowed, the efficiency of the permanent magnet mechanism is improved, the reduction of the closing touching current on the premise of large remaining force of closing is benefited, and the bistable dissymmetrical permanent magnet operating mechanism has obvious advantages in energy conservation and load decreasing during the control protection period.
Description
Technical field
The utility model relates to a kind of permanent-magnet manipulating mechanism, relates in particular to a kind of big current vacuum generator outlet circuit breaker with the asymmetric permanent-magnet manipulating mechanism of bistable state.
Background technology
Big current vacuum generator outlet circuit breaker adopts the patent of invention (patent No.: " two contact " vacuum interrupter ZL200710012389.1); This vacuum interrupter is made up of master, two pairs of contacts of arc; Wherein main contact is high specific conductance, heavy in section main contact; Be used for carrying the long-term work electric current; Arcing contact is made up of refractory material (like
alloy); Be used for cut-offfing high rated short circuit current, and then realize accomplishing the requirement of carrying big rated current and cut-offfing high short circuit current simultaneously by single arc control device.Close in the process when this high current vacuum circuit breaker closes, arcing contact elder generation closure is also compressed certain distance
back main contact closure.When the circuit breaker breaking course begins; Main contact earlier separately and arcing contact still is in the close position; Release along with quiet arc contact end secondary spring; Quiet end arcing contact is covered compression distance
back and is separated with the moved end arcing contact, and all electric current is transferred on the arcing contact by main contact.Open in scope whole, electric arc burns between dynamic and static arcing contact.This moment, electric arc was extinguished easily owing to the existence in magnetic field.Because main contact separates earlier during separating brake, this moment, arcing contact still was in conducting state, and electric current will be transferred to arcing contact from main contact, and was finally accomplished the task of cut-offfing of short circuit current by arcing contact, and it closes, the structure of contact terminal sketch map is as illustrated in fig. 1 and 2 under the gate-dividing state.
Big current vacuum generator outlet breaker operation mechanism and power transmission and distribution circuit breaker are different, answer specialized designs.At first to adapt with the requirement of high rated short circuit drop-out current, big rated current.It not only should have suitable branch, closing speed, enough switching forces also should be arranged with the very big electrodynamic repulsion force of opposing, develops the event of making trouble in order to avoid contact is scolded.Because the big current vacuum generator circuit breaker main contact of particular design and arcing contact are in same arc control device; Load characteristic is the syllogic curve; Operating mechanism will satisfy arcing contact and close afterwards earlier and divide, and this and general vacuum circuit-breaker operating mechanism are different, so operating mechanism needs design again.
Summary of the invention
The utility model provides a kind of bistable state asymmetric permanent-magnet manipulating mechanism to the problem that exists in the above-mentioned prior art, has solved the big problem of combined floodgate pick-up current in the prior art, and the utility model improved movement velocity and efficient, has reduced loss.
The technical scheme of the utility model is following:
Outer yoke is fixed between bottom end cover and the upper end cover, and moving iron core places the outer yoke inner chamber, and moving iron core is the cylinder of variable cross-section; Connecting rod is fixed on the moving iron core; Closing coil, permanent-magnetic clamp, magnetic inductive block and switching winding are housed from the bottom end cover to the upper end cover between outer yoke and the moving iron core successively.
Described outer yoke is a hollow cylinder.
Described permanent-magnetic clamp is made up of at least one permanent magnet, and at least one permanent magnet is in a plane and radially be symmetry shape and arrange, and is that the center of circle surrounds a circle with moving axle center unshakable in one's determination.
Described permanent-magnetic clamp is added by magnetic inductive block and outer yoke and fastens.
Described closing coil and switching winding are wound on the hard skeleton respectively.
The outside, two ends of described moving iron core is provided with upper and lower guider respectively.
Described moving iron core radially offers groove.
The utility model has the advantages of as follows:
1, adopts cylindrical structural,, reduce the overall dimension of device to increase the magnetic conductive area of outer yoke.
2, asymmetrical moving core construction can reduce the permanent magnetism confining force of permanent magnet on the separating brake position, also can reduce the quality of permanent-magnet manipulating mechanism moving part as much as possible, and motion of mechanism speed is very favourable for improving.
3, moving iron core is radially slotted, and reduces the heating loss greatly, improves the efficient of permanent magnet mechanism.
4, help under the bigger prerequisite of closing retention force, reducing the combined floodgate pick-up current of operating mechanism, will have clear superiority with the burden aspect that reduces to control guard period from energy-conservation.
Description of drawings
Fig. 1 is two contact large-current vacuum arc extinguishing chamber contact gate-dividing state structural representations.
Fig. 2 is two contact large-current vacuum arc extinguishing chamber contact "on" position structural representations.
Fig. 3 is a permanent magnet mechanism symmetrical structure sketch map.
Fig. 4 is a permanent magnet mechanism asymmetric structural representation.
Fig. 5 is the asymmetric permanent-magnet manipulating mechanism structural representation of the utility model bistable state.
Fig. 6 is the moving notching construction sketch map unshakable in one's determination of the utility model.
Among the figure, 101, the arc guide electric pole, 102, quiet main contact, 103, the quiet arc contact, 104, moving arcing contact, 105, moving main contact, 106, moving leading electric pole; 1, lower end fairlead; 2, bottom end cover; 3, outer yoke; 4, closing coil; 5, permanent-magnetic clamp; 6, magnetic inductive block; 7, moving unshakable in one's determination; 8, switching winding; 9, upper end cover; 10, upper end fairlead; 11, connecting rod.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Embodiment
As shown in Figure 5, outer yoke 3 is a hollow cylinder, and outer yoke 3 is fixed between bottom end cover 2 and the upper end cover 9 and fixes through nut; Moving unshakable in one's determination 7 place outer yoke 3 inner chambers, and moving unshakable in one's determination 7 is the cylinder of variable cross-section, and moving unshakable in one's determination 7 radially offer groove, and the outside, moving unshakable in one's determination 7 two ends is provided with upper and lower guider respectively; Connecting rod 11 is fixed on moving unshakable in one's determination 7 and is fixed by nut; 9 closing coil 4, permanent-magnetic clamp 5, magnetic inductive block 6 and switching winding 8 are housed successively from bottom end cover 2 to upper end cover between the outer yoke 3 and moving unshakable in one's determination 7.Permanent-magnetic clamp 5 is added by magnetic inductive block 6 and outer yoke 3 and fastens, and permanent-magnetic clamp 5 is made up of at least one permanent magnet, and at least one permanent magnet is in a plane and radially be symmetry shape and arrange, and is that the center of circle surrounds a circle to move axle center unshakable in one's determination.Described closing coil 4 is wound on the hard skeleton respectively with switching winding 8.
The operation principle of the utility model is following:
Have simple in structurely based on permanent magnet mechanism, actuating is rapid, reliable and stable, the advantage of long service life, and decision adopts bistable-state permanent magnet mechanism to match with the large-current vacuum arc extinguishing chamber load characteristic.The utility model, bistable-state permanent magnet mechanism adopts cylindrical structural, to increase the magnetic conductive area of outer yoke, reduces the overall dimension of device.
Stressed self-closing power, bellows counter-force, the confining force of permanent magnet and gravity, frictional force and the damping etc. of moving component that comprise touch spring counter-force, vacuum interrupter moving unshakable in one's determination of permanent-magnet manipulating mechanism in the utility model.In the separating brake process; The gravity of touch spring counter-force and moving component and the electromagnetic force of switching winding are in the same way; As long as overcome the frictional force and the damping of self-closing power, bellows counter-force and moving component of confining force, the vacuum interrupter of permanent magnet, moving unshakable in one's determinationly just can move to the separating brake position from closing position.Because the touch spring counter-force only just works in the excess of stroke stage, thereby moving iron core does not need too big confining force on the separating brake position.If electromagnetic system adopts symmetrical structure up and down shown in Figure 3, when moving iron core was on separating brake and closing position, permanent magnet mechanism equated at the permanent magnetism confining force of divide-shut brake position basically; Inequality (power of touch spring is 6060N during the combined floodgate of circuit breaker and circuit breaker is in the power that imposes on permanent magnet mechanism of divide-shut brake position; And in the separating brake position, the self-closing power of vacuum interrupter and the counter-force of bellows be approximately 923.131N), so permanent magnet mechanism carry out branch, when closing a floodgate; The starting current of divide-shut brake coil just differs greatly; Starting current is bigger during combined floodgate, and is also bigger through the peak current of closing coil, not only causes energy loss and condenser capacity to increase; And the component parameters of the switch current of control unit also must correspondingly improve, and the cost of whole circuit breaker will increase.Based on above reason, the utility model has adopted a kind of asymmetric permanent-magnet manipulating mechanism, and " asymmetric " is embodied on the moving structure unshakable in one's determination.Visible by Fig. 5, moving iron core is the cylinder of a variable section structure.The power of touch spring is 6060N during the combined floodgate of circuit breaker, thereby moving iron core needs bigger confining force on closing position, so it is bigger to move the area of combined floodgate end face unshakable in one's determination.Because the touch spring counter-force only just works in the excess of stroke stage, thereby moving iron core does not need too big confining force on the separating brake position.Because air-gap reluctance and area of core section are inversely proportional to, can increase air-gap reluctance again, so just can reduce the permanent magnetism confining force of permanent magnet on the separating brake position through the contact area that reduces dynamic and static iron core on the separating brake position.
The project organization moving unshakable in one's determination of this " asymmetric " also can reduce the quality of permanent-magnet manipulating mechanism moving part on the other hand as much as possible, also is very favourable for improving motion of mechanism speed.
Permanent-magnet manipulating mechanism can produce eddy current in the magnetic conductor in course of action; This eddy current can slow down the speed that electric current rises, the run duration of the moving iron core that extended to the growth of anti-flux; Simultaneously eddy current again with the form consumption of resistance heating in magnetic conductor, reduced the efficient of permanent magnet mechanism.Square being directly proportional of eddy current and magnetic flux density, therefore eddy current effect is remarkable especially on moving iron core, as with it perpendicular to eddy current direction fluting (promptly along cylinder radially fluting unshakable in one's determination), then can reduce the heating loss greatly, improve the efficient of permanent magnet mechanism.
When while permanent-magnet manipulating mechanism branch, combined floodgate, moving rapid movement unshakable in one's determination.Because permanent-magnet manipulating mechanism is a relative obturator, the air when moving quick acting unshakable in one's determination in the air gap has little time to discharge, so air receives compression to a certain degree, the resistance of the moving iron core motion of formation resistance, thereby reduction closing speed.When moving unshakable in one's determination when radially making otch, these otch both can reduce eddy current, can reduce air drag again.The utility model has carried out fluting to moving iron core to be handled.As shown in Figure 6.
The utility model main with 18kV/10000A/31.5kA (80kA) greatly current vacuum generator outlet circuit breaker be used.
Claims (7)
1. the asymmetric permanent-magnet manipulating mechanism of bistable state is characterized in that outer yoke is fixed between bottom end cover and the upper end cover, and moving iron core places the outer yoke inner chamber, and moving iron core is the cylinder of variable cross-section; Connecting rod is fixed on the moving iron core; Closing coil, permanent-magnetic clamp, magnetic inductive block and switching winding are housed from the bottom end cover to the upper end cover between outer yoke and the moving iron core successively.
2. the asymmetric permanent-magnet manipulating mechanism of bistable state according to claim 1 is characterized in that described outer yoke is a hollow cylinder.
3. the asymmetric permanent-magnet manipulating mechanism of bistable state according to claim 1; It is characterized in that described permanent-magnetic clamp is made up of at least one permanent magnet; At least one permanent magnet is in a plane and radially be symmetry shape and arrange, and is that the center of circle surrounds a circle with moving axle center unshakable in one's determination.
4. the asymmetric permanent-magnet manipulating mechanism of bistable state according to claim 1 is characterized in that described permanent-magnetic clamp is added by magnetic inductive block and outer yoke to fasten.
5. the asymmetric permanent-magnet manipulating mechanism of bistable state according to claim 1 is characterized in that described closing coil and switching winding are wound on the hard skeleton respectively.
6. the asymmetric permanent-magnet manipulating mechanism of bistable state according to claim 1 is characterized in that the outside, two ends of described moving iron core is provided with upper and lower guider respectively.
7. the asymmetric permanent-magnet manipulating mechanism of bistable state according to claim 1 is characterized in that described moving iron core radially offers groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220077726 CN202473642U (en) | 2012-03-05 | 2012-03-05 | Bistable dissymmetrical permanent magnet operating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220077726 CN202473642U (en) | 2012-03-05 | 2012-03-05 | Bistable dissymmetrical permanent magnet operating mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN202473642U true CN202473642U (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220077726 Expired - Fee Related CN202473642U (en) | 2012-03-05 | 2012-03-05 | Bistable dissymmetrical permanent magnet operating mechanism |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103500672A (en) * | 2013-10-12 | 2014-01-08 | 东南大学 | Permanent magnet operating mechanism for circuit breaker |
| CN103854888A (en) * | 2012-11-30 | 2014-06-11 | 沈阳工业大学 | Bistable square permanent-magnet operating mechanism with eddy-current slowdown function |
| CN110010407A (en) * | 2019-05-14 | 2019-07-12 | 云南电网有限责任公司电力科学研究院 | A kind of electromagnetic operating mechanism and breaker |
| CN110660609A (en) * | 2018-06-29 | 2020-01-07 | 上海索菱电力科技有限公司 | Indoor vacuum circuit breaker |
-
2012
- 2012-03-05 CN CN 201220077726 patent/CN202473642U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854888A (en) * | 2012-11-30 | 2014-06-11 | 沈阳工业大学 | Bistable square permanent-magnet operating mechanism with eddy-current slowdown function |
| CN103854888B (en) * | 2012-11-30 | 2017-12-19 | 沈阳工业大学 | It is a kind of to have the square permanent-magnet manipulating mechanism of bistable state for being vortexed slow function |
| CN103500672A (en) * | 2013-10-12 | 2014-01-08 | 东南大学 | Permanent magnet operating mechanism for circuit breaker |
| CN103500672B (en) * | 2013-10-12 | 2016-06-01 | 东南大学 | Isolating switch permanent-magnet manipulating mechanism |
| CN110660609A (en) * | 2018-06-29 | 2020-01-07 | 上海索菱电力科技有限公司 | Indoor vacuum circuit breaker |
| CN110010407A (en) * | 2019-05-14 | 2019-07-12 | 云南电网有限责任公司电力科学研究院 | A kind of electromagnetic operating mechanism and breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20140305 |