CN101847528A - Permanent-magnet operating mechanism for circuit breaker - Google Patents
Permanent-magnet operating mechanism for circuit breaker Download PDFInfo
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- CN101847528A CN101847528A CN201010178287A CN201010178287A CN101847528A CN 101847528 A CN101847528 A CN 101847528A CN 201010178287 A CN201010178287 A CN 201010178287A CN 201010178287 A CN201010178287 A CN 201010178287A CN 101847528 A CN101847528 A CN 101847528A
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Abstract
The invention relates to an operating mechanism for a medium-high voltage distribution line circuit breaker, belonging to electrical equipment. The permanent-magnet operating mechanism comprises a movable shaft, coils and a permanent magnet, wherein the movable shaft is positioned at the axial lines of the coils; the permanent magnet is circular and fixed on the movable shaft, and the outer diameter of the permanent magnet is less than the inner diameter of each coil; the number of the coils is at least two; and the coils are coaxially arranged in a circular cylinder body. On the basis of the structure, the invention can also have the structure that the cylinder body can conduct magnetism and has an axial section which is in a hollow H shape, and both ends of the cylinder body are provided with an upper cover plate and a lower bottom plate which both can conduct magnetism. The invention strengthens the interaction among magnetic fields, increases the utilization ratio of the magnetic fields, realizes the idle work of the on-off state of the circuit breaker operating mechanism, optimizes the on-off state characteristics of the circuit breaker operating mechanism, enhances the controllability of the circuit breaker, has the advantages of simple structure and low cost, and enhances the reliability of the whole circuit breaker.
Description
Affiliated technical field
The present invention relates to a kind of operating mechanism that is used for mesohigh distribution line circuit breaker, belong to electric equipment.
Background technology
At present, in the power industry at home and abroad, the vacuum circuit breaker operating mechanism that is used for distribution line mainly is a principle of utilizing the electromagnetic fields attract ferromagnetic material, promptly by attracting to be fixed on armature on the movable axis for respectively coil electricity near movable axis upper end or lower end, up or down move thereby drive movable member, realize the combined floodgate or the separating brake of circuit breaker.Because this operating mechanism is to utilize electromagnet that the suction of ferromagnetic material is ordered about the moving component motion, so moving component can only quicken, can not slow down in the process of motion, the divide-shut brake performance of operating mechanism is not ideal enough, and can not realize the idle maintenance (promptly need energising, consumed power in coil keeps separating brake or "on" position) of opening and closing state.Continuous development along with technology, scientific and technical personnel have carried out significant improvement to it: install permanent magnet additional between two coils, when circuit breaker is in "on" position, the magnetic field that permanent magnet produces interacts with armature on the movable axis that moves to the top, it is motionless to get final product the holding armature position under the situation that coil need not to switch on, and realizes the idle maintenance of "on" position; When circuit breaker was in gate-dividing state, same, the magnetic field that permanent magnet produces interacted with armature on the movable axis that moves to the below, realizes the idle maintenance of gate-dividing state.Circuit breaker operation mechanism after this improvement, by installing the permanent magnet that is used for idle maintenance specially additional, solved the idle maintenance problem (promptly having realized bistable state) of opening and closing state, but the while makes that also the structure of whole circuit breaker operation mechanism is complicated more, cost is higher, reliability is poorer, and the making process of circuit breaker still can only quicken, can not slow down, the combined floodgate performance is not ideal enough, and controllability is relatively poor.
Summary of the invention
Technical problem to be solved by this invention be to vacuum circuit-breaker design that a kind of controllability is good, reliability is high, simple in structure, cheap, can realize bistable operating mechanism simultaneously.
The permanent-magnet operating mechanism of circuit breaker proposed by the invention includes movable axis, coil and permanent magnet, and movable axis is positioned at the axial location of coil; Permanent magnet is a ring-type, is fixed on the movable axis, and the permanent magnet external diameter is less than internal coil diameter; Coil is divided into two at least, the coaxial annular cylinder that places.
On the basis of above structure, the present invention can also be: cylinder body wherein is a magnetic conduction, and its axial cross section is hollow " H " type; The cylinder body two ends are provided with the upper cover plate and the lower shoe of magnetic conduction.
The present invention is owing to be fixed on permanent magnet on the movable axis, and alternative armature has served as the driving element of divide-shut brake, has improved the magnetic field utilance greatly, and the structure that simplifies the internal structure of an organization has reduced production cost, has improved the reliability of whole circuit breaker; Hot-wire coil has repulsion again to the existing suction of permanent magnet, makes can quicken in the operating mechanism divide-shut brake process and can slow down, and has better divide-shut brake characteristic; Simultaneously, utilize permanent magnet also can realize the idle maintenance of circuit breaker operation mechanism opening and closing state to the suction of two ends ferromagnetic material about the mechanism.
Description of drawings
Fig. 1 is the structure principle chart of the embodiment of the invention;
Fig. 2 is the structural representation that the present invention is applied to vacuum circuit-breaker.
Embodiment
Describe the present invention below in conjunction with drawings and Examples, but technical scheme of the present invention is not limited thereto.In actual applications, vacuum circuit-breaker is generally to erect and places, and vacuum chamber is positioned at the operating mechanism top; Can certainly oppositely erect placement, horizontal positioned or the placement of tilting according to actual needs.
In embodiments of the invention shown in Figure 1, include movable axis 2, go up coil 4, lower coil 6 and permanent magnet 3.Movable axis 2 is positioned at the axial location of coil 4 and lower coil 6.Last coil 4 and lower coil 6 coaxial being positioned in the annular cylinder 5.Each internal coil diameter is that 50mm, external diameter are 98mm, highly are 28mm, and two coil arranged in co-axial alignment are in the upper and lower part of cylinder body.Cylinder body plays the effect of installation and fixed coil as the support frame of last lower coil, and the cylinder body wall thickness is 10mm, thereby guarantees enough mechanical strengths.Above last coil 4, can also be provided with upper cover plate 1, below lower coil 6, can also be provided with lower shoe 7, upper cover plate 1 links to each other with cylinder body 5 upper and lower ends respectively with lower shoe 7, and two coils are surrounded, and coil is arranged in the inner chamber that cylinder body 5, upper cover plate 1 and lower shoe 7 threes constitute.Permanent magnet 3 and movable axis 2 are arranged in the vacancy of cylinder body 5.Permanent magnet 3 is a ring-type, highly is 40mm, and its external diameter is 45mm, less than internal coil diameter, be fixed on diameter and be on the movable axis 2 of 12mm (can fix by screw element, also can adopt modes such as welding, riveted joint to fix), can drive the upper and lower together motion of movable axis 2.When lower coil 6 fed reverse current (making coil produce the direction in magnetic field and the opposite electric current of direction in permanent magnet 3 magnetic fields at permanent magnet 3 places), permanent magnet 3 was subjected to coil 6 and pushes away the repulsion that it makes progress; Otherwise when last coil 4 feeding reverse currents, when producing the magnetic field opposite with the permanent magnetic field direction at permanent magnet 3 places, permanent magnet 3 is subjected to coil 4 and pushes away its downward repulsion; And when feeding forward current (making coil produce the direction in magnetic field and the identical electric current of direction in permanent magnet 3 magnetic fields at permanent magnet 3 places) in the coil, will produce suction between coil and the permanent magnet 3 and attract each other.Therefore,, just can make permanent magnet 3 be subjected to up or down active force, up or down moving together thereby make permanent magnet 3 drive movable axises 2 by change feeding the electric current in the coil.Permanent magnet 3 has served as the driving element of divide-shut brake in the present invention, and both directly integral body was processed into required shape, can be again assembled by the polylith of same diameter.Movable axis 2 is non-magnet material (for example stainless steel, an aluminium alloy etc.), in order to avoid the magnetic field between permanent magnet 3 and the coil is exerted an influence.
Among the present invention, the cylinder body 5 of coil 4 and lower coil 6 can also be magnetic conduction (for example DT4C, No. 20 steel etc.) in the placement, the upper cover plate 1 of cylinder body 5 tops and the lower shoe 7 of below also can be magnetic conduction (for example DT4C, No. 20 steel etc.), and cylinder body 5, upper cover plate 1 and lower shoe 7 threes have constituted the unobstructed magnetic loop of closed in itself.That is the outer end of two coils wrapped up by ferromagnetic material respectively, and permanent magnet moves in coil and inner chamber that ferromagnetic material is gone, thus retrain greatly the magnetic line of force trend, reduce magnetic resistance.The thickness of ferromagnetic material will guarantee that its magnetic field is unsaturated.Annular cylinder 5 can also be designed to the form that axial cross section is hollow " H " type, be that the cylinder body middle part has a ring-type " crossbeam ", two coils lay respectively at the upper and lower part of cylinder body " H " type " crossbeam ", be surrounded on respectively in upper and lower two inner chambers of cylinder body 5, upper cover plate 1 and lower shoe 7 threes formation, so not only significantly reduced leakage field, also making in the time of can not forming mutual inductance phenomenon, electric current of make-and-break between two coils not can the phase mutual interference, and response speed and handling will be improved.Upper cover plate 1 and lower shoe 7 can also interact with permanent magnet 3, thereby realize the bistable state of circuit breaker: when movable axis 2 moves upward to correct position, permanent magnet 3 attracts each other with upper cover plate 1, realizes idle maintenance; When movable axis 3 moves downward correct position, permanent magnet 3 attracts each other with lower shoe 7, realizes idle maintenance.Simultaneously, when circuit breaker is in "on" position, utilize the very big suction of 1 pair of permanent magnet of upper cover plate, 3 generations, can obviously improve the contact pressure of circuit breaker dynamic/static contact, reduce its resistance.
In the present invention, 6 pairs of built-in permanent magnets 3 of coil 4 and lower coil drive the performance that can significantly improve whole circuit-breaker switching on-off in the employing.When circuit breaker is in the separating brake position, permanent magnet 3 is in nearest position with lower coil 6, this moment is if feed reverse current for lower coil 6, then the upwards repulsion that produced of 6 pairs of permanent magnets 3 of lower coil is maximum, moving component under this repulsion effect up the motion closing operation and the closing speed that quicken to drive improve rapidly.When combined floodgate proceeds to latter end, for the combined floodgate end speed that makes circuit breaker (is avoided producing excessive impulsive contact force in the moment of closing a floodgate) in reasonable range, can disconnect the reverse current in the lower coil 6 and feed reverse current for last coil 4, permanent magnet 3 distance this moment last coil 4 is nearer, the downward repulsion that 4 pairs of permanent magnets of last coil 3 produce is bigger, thereby makes the closing speed of circuit breaker drop to the closing operation that desirable scope is interior, carry out deceleration rapidly.Acceleration in the separating brake process and decelerating phase are similarly.
In addition, in making process, also can adopt two coils to feed electric current simultaneously permanent magnet 3 is quickened to drive and deceleration, thereby, improve the controllability of mechanism the electromagnetic actuation force linearisation in the whole making process.Promptly when needs quicken to drive to permanent magnet 3, feed reverse current for lower coil 6 and permanent magnet 3 is produced repulsion upwards, feed forward current for simultaneously last coil 4 and permanent magnet 3 is produced suction upwards by it by it.If in the time of need carrying out deceleration to permanent magnet 3, feed forward current for lower coil 6 and permanent magnet 3 is produced downward suction by it, feed reverse current for simultaneously last coil 4 and permanent magnet 3 is produced downward repulsion by it.Like this permanent magnet 3 in the combined floodgate accelerator in the suffered total electromagnetic force that makes progress, the combined floodgate moderating process suffered downward total electromagnetic force and its moving displacement be approximated to linear relationship, the combined floodgate controllability of mechanism obviously improves.Acceleration in the separating brake process and decelerating phase are similarly.
Be applied among the embodiment of vacuum circuit-breaker in the present invention shown in Figure 2, movable axis 2 in the operating mechanism 10 and the vacuum chamber moving contact that stretches out from vacuum chamber 89 are consolidated by screw thread, movable axis 2 just can drive moving contact of breaker 10 and moves up and down together like this, thereby realizes the combined floodgate and the separating brake of circuit breaker.
For example: when circuit breaker carries out closing operation, feed reverse current for lower coil 6,6 pairs of permanent magnets of lower coil 3 produce electromagnetic repulsion force upwards, the suction sum of the pulling force of electromagnetic force and vacuum chamber 8 and 1 pair of permanent magnet 3 of upper cover plate is greater than the gravity sum of the suction and the movable member of 7 pairs of permanent magnets 3 of lower shoe at this moment, permanent magnet 3 drives movable axis 2 and moving contact 9 up motion together under the effect of bonding force, implement closing operation, when combined floodgate proceeds to latter end, disconnect the reverse current in the lower coil 6 and feed reverse current for last coil 4,4 pairs of permanent magnets of coil 3 produce downward electromagnetic repulsion force in the event, the suction of 1 pair of permanent magnet 3 of upper cover plate this moment and the pulling force sum of vacuum chamber 8 are less than electromagnetic force, the suction of 7 pairs of permanent magnets 3 of lower shoe and the gravity sum of movable member, moving component reduces speed now, the combined floodgate of realizing ideal.Finish after the combined floodgate, disconnect the electric current that feeds in the coil, this moment, permanent magnet 3 will be bordering on lower shoe 7 apart from upper cover plate 1, the suction of 1 pair of permanent magnet 3 of upper cover plate and vacuum chamber pulling force sum will be much larger than the gravity sums of the suction and the movable member of 7 pairs of permanent magnets 3 of lower shoe, thereby guarantee the specified clossing pressure of dynamic/static contact, realize the reliable idle maintenance of "on" position.In like manner, successively in last coil 4, lower coil 6, feed effective separating brake that reverse current just can be realized circuit breaker, change the electric current that feeds coil and just can control effectively the separating brake process.After separating brake is finished, the suction of 1 pair of permanent magnet 3 of upper cover plate and vacuum chamber pulling force sum will be much smaller than the gravity sums of the suction and the movable member of 7 pairs of permanent magnets 3 of lower shoe, utilize the gravity sum of the suction of 7 pairs of permanent magnets 3 of lower shoe and movable member just can realize the reliable idle maintenance of gate-dividing state.More than be to make an explanation, but technical scheme of the present invention is not limited thereto according to the mode that circuit breaker is vertically placed.
Make a general survey of whole invention, because permanent magnet is fixed on the movable axis, alternative armature has served as the driving element of divide-shut brake, also serve as simultaneously the power source of idle maintenance, promptly, improved the magnetic field utilance greatly, the structure that simplifies the internal structure of an organization by attracting upper cover plate 1 and lower shoe 7 to realize bistable state, reduce production cost, improved the reliability of whole circuit breaker; Adopt hot-wire coil that built-in permanent magnet is driven, hot-wire coil has repulsion again to the existing suction of permanent magnet, make and can quicken in the operating mechanism divide-shut brake process and can slow down, also can be by changing the divide-shut brake speed that feeds the real-time control operation of the size and Orientation mechanism of electric current in the coil, obviously promoting the divide-shut brake performance of whole circuit breaker; Last lower coil switched on simultaneously also the magnetic field linearisation of permanent magnet moving region further can be significantly improved the controllability of circuit breaker; Axial cross section is the magnetic conduction cylinder body 5 of hollow H type, also can significantly improve the magnetic circuit in magnetic field, and effectively suppresses to go up the mutual inductance between coil 4 and the lower coil 6, thereby has accelerated the response speed of electric current of make-and-break in the coil greatly, has improved the control performance of whole operation mechanism.The present invention has effectively promoted the stability and the reliability of circuit breaker, obviously improves the combination property of circuit breaker, satisfies industry standard and instructions for use, can be used for the mesohigh distribution line.
Claims (3)
1. the permanent-magnet operating mechanism of a circuit breaker includes movable axis, coil and permanent magnet, and movable axis is positioned at the axial location of coil, it is characterized in that: permanent magnet is a ring-type, is fixed on the movable axis, and the permanent magnet external diameter is less than internal coil diameter; Coil is divided into two at least, the coaxial annular cylinder that places.
2. the permanent-magnet operating mechanism of circuit breaker according to claim 1, it is characterized in that: described cylinder body is a magnetic conduction, its axial cross section is hollow " H " type.
3. the permanent-magnet operating mechanism of circuit breaker according to claim 1, it is characterized in that: described cylinder body two ends are provided with the upper cover plate and the lower shoe of magnetic conduction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010178287A CN101847528A (en) | 2010-05-14 | 2010-05-14 | Permanent-magnet operating mechanism for circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010178287A CN101847528A (en) | 2010-05-14 | 2010-05-14 | Permanent-magnet operating mechanism for circuit breaker |
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| CN101847528A true CN101847528A (en) | 2010-09-29 |
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| CN201010178287A Pending CN101847528A (en) | 2010-05-14 | 2010-05-14 | Permanent-magnet operating mechanism for circuit breaker |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928245A (en) * | 2014-04-11 | 2014-07-16 | 北京博瑞莱智能科技集团有限公司 | Bi-stability permanent magnetic mechanism and application method thereof |
| CN112327102A (en) * | 2020-11-02 | 2021-02-05 | 国网山东省电力公司威海供电公司 | Outdoor circuit breaking maintenance device for intelligent power distribution network |
| CN112713050A (en) * | 2020-12-11 | 2021-04-27 | 平高集团有限公司 | Electromagnetic quick mechanism and quick mechanical switch |
| CN113241267A (en) * | 2021-03-29 | 2021-08-10 | 平高集团有限公司 | Quick opening/closing electromagnetic repulsion mechanism and quick opening/closing switch |
-
2010
- 2010-05-14 CN CN201010178287A patent/CN101847528A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928245A (en) * | 2014-04-11 | 2014-07-16 | 北京博瑞莱智能科技集团有限公司 | Bi-stability permanent magnetic mechanism and application method thereof |
| CN112327102A (en) * | 2020-11-02 | 2021-02-05 | 国网山东省电力公司威海供电公司 | Outdoor circuit breaking maintenance device for intelligent power distribution network |
| CN112713050A (en) * | 2020-12-11 | 2021-04-27 | 平高集团有限公司 | Electromagnetic quick mechanism and quick mechanical switch |
| CN113241267A (en) * | 2021-03-29 | 2021-08-10 | 平高集团有限公司 | Quick opening/closing electromagnetic repulsion mechanism and quick opening/closing switch |
| CN113241267B (en) * | 2021-03-29 | 2023-02-17 | 平高集团有限公司 | Quick opening/closing electromagnetic repulsion mechanism and quick opening/closing switch |
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Application publication date: 20100929 |