CN104851740A - Long stroke permanent magnetic actuator with auxiliary coil for high-voltage vacuum circuit breaker - Google Patents
Long stroke permanent magnetic actuator with auxiliary coil for high-voltage vacuum circuit breaker Download PDFInfo
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- CN104851740A CN104851740A CN201510281850.8A CN201510281850A CN104851740A CN 104851740 A CN104851740 A CN 104851740A CN 201510281850 A CN201510281850 A CN 201510281850A CN 104851740 A CN104851740 A CN 104851740A
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- permanent magnet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
Abstract
The present invention discloses a long stroke permanent magnetic actuator with an auxiliary coil for a high-voltage vacuum circuit breaker, belonging to the field of high-voltage vacuum circuit breakers. The long stroke permanent magnetic actuator comprises a permanent magnet maintaining mechanism, an electromagnetic drive mechanism and a guide rod. The permanent magnet maintaining mechanism comprises a closing static core, a closing permanent magnet, an auxiliary opening coil, an opening static core, an opening permanent magnet, an auxiliary closing coil and a maintaining moving core. The electromagnetic drive mechanism comprises a closing coil, a start-buffer coil, an opening coil, a driving static core and a driving moving core. A non-magnetic material gasket is arranged between the permanent magnet maintaining mechanism and the electromagnetic drive mechanism. The outer side wall of the driving moving core is provided with an axial groove. According to the long stroke permanent magnetic actuator, through arranging the auxiliary opening coil and the auxiliary closing coil in the permanent magnet maintaining mechanism, the permanent magnet influence of the permanent magnet mechanism can be rapidly eliminated in action, and thus the response speed of the permanent magnet mechanism is greatly improved.
Description
Technical field
The present invention relates to a kind of high-pressure vacuum breaker long-stroke permanent magnet operating mechanism with ancillary coil, belongs to high-pressure vacuum breaker field.
Background technology
Vacuum circuit-breaker is little, lightweight with its volume, be applicable to frequent operation, advantage that arc extinguishing need not overhaul, captured rapidly medium voltage breaker market, and developed to high pressure field further.Operating mechanism that vacuum circuit-breaker is joined has electromagnetic type, spring and magneto three kinds usually.Wherein permanent magnet drive mechanism rely on that it is highly reliable, low energy consumption, non-maintaining, and can the plurality of advantages such as simultaneous operation be realized, day by day cause the concern of people.The requirement that high-pressure vacuum breaker splits distance is comparatively large, and this just requires that operating mechanism has higher divide-shut brake speed.And, because dynamic stroke unshakable in one's determination is comparatively large, cause dynamic unshakable in one's determination when starting air-gap reluctance very large, this just needs magnetizing coil to pass into larger exciting curent, thus cause switching tube Selecting parameter excessive, control the series of problems such as difficulty increasing.These problems limit the application of permanent magnet mechanism in high-pressure vacuum breaker field.Meanwhile, due to the problem of traditional permanent magnet mechanism structure, at divide-shut brake stroke latter end, dynamic meeting accelerated motion unshakable in one's determination, having very large impulsive force when terminating motion, can cause contact bounce, and reduce the contact life-span when closing a floodgate.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of high-pressure vacuum breaker long-stroke permanent magnet operating mechanism of ancillary coil, solves the problem of three-winding permanent magnet mechanism divide-shut brake speed responsing overlong time.
Technical scheme: for achieving the above object, the technical solution used in the present invention is: a kind of high-pressure vacuum breaker long-stroke permanent magnet operating mechanism with ancillary coil, comprise permanent magnet holding mechanism (2), electromagnetic drive mechanism (3) and guide rod (1)
Described permanent magnet holding mechanism (2) comprises top permanent magnet holding mechanism and bottom permanent magnet holding mechanism, described top permanent magnet holding mechanism and bottom permanent magnet holding mechanism are oppositely arranged, and be provided with maintenance dynamic (10) unshakable in one's determination between described top permanent magnet holding mechanism and bottom permanent magnet holding mechanism, and described maintenance dynamic (10) the unshakable in one's determination middle centre bore be provided with for location guide (1); Described top permanent magnet holding mechanism comprises opening-core (4), combined floodgate permanent magnet (6), auxiliary switching winding (7), keeps dynamic (10) unshakable in one's determination; Described combined floodgate permanent magnet (6), auxiliary switching winding (7) are arranged at opening-core (4) inside, and described auxiliary switching winding (7) is arranged at the downside of combined floodgate permanent magnet (6); Described bottom permanent magnet holding mechanism comprises closing-core (5), auxiliary switching-in coil (8), separating brake permanent magnet (9), it is inner that described auxiliary switching-in coil (8), separating brake permanent magnet (9) are arranged at closing-core (5), and described auxiliary switching-in coil (8) is positioned at the downside of separating brake permanent magnet (9);
Described electromagnetic drive mechanism (3) comprises closing coil (12), startup-buffer coil (13), switching winding (14), drives fixed core (15), drives dynamic (16) unshakable in one's determination; Described driving is moved (16) unshakable in one's determination and is arranged in driving fixed core (15), and is slidably connected between described driving dynamic (16) unshakable in one's determination and driving fixed core (15); Described driving fixed core (15) inside is provided with first, second, third coil groove from top to bottom, and the opening of described first, second, third coil groove is all towards dynamic (16) side unshakable in one's determination of driving, and described closing coil (12) is positioned in First Line ring recess, startup-buffer coil (13) is positioned in the second coil groove, and switching winding (14) is positioned in tertiary coil groove;
Nonmagnetic substance pad (11) is provided with between described permanent magnet holding mechanism (2) and electromagnetic drive mechanism (3); Described guide rod (1) is from top to bottom successively through top permanent magnet holding mechanism, bottom permanent magnet holding mechanism, nonmagnetic substance pad (11) and driving fixed core (15), and with top permanent magnet holding mechanism, bottom permanent magnet holding mechanism, nonmagnetic substance pad (11) and drive fixed core (15) to be slidably connected, simultaneously described guide rod (1) respectively with keep the centre bore of dynamic (10) unshakable in one's determination, drive dynamic iron core (16) to be fixedly connected with.
Preferred: described opening-core (4) comprises the first opening-core and the second opening-core that are oppositely arranged, described first opening-core and the second opening-core offer the first mounting groove of coupling mutually, and described combined floodgate permanent magnet (6), auxiliary switching winding (7) are arranged in the first mounting groove; Described closing-core (5) comprises the first closing-core and the second closing-core, described first closing-core and the second closing-core offer the second mounting groove of coupling mutually, and described auxiliary switching-in coil (8), separating brake permanent magnet (9) are arranged in the second mounting groove.
Preferred: described maintenance dynamic unshakable in one's determination (10) is greater than the solid disk of combined floodgate permanent magnet (6) and separating brake permanent magnet (9) external diameter for radius.
Preferred: the shape of described permanent magnet holding mechanism (2), electromagnetic drive mechanism (3) can be columniform or cuboid.
Preferred: described auxiliary switching winding (7) is identical with the internal-and external diameter of combined floodgate permanent magnet (6), and auxiliary switching-in coil (8) is identical with the internal-and external diameter of separating brake permanent magnet (9).
A kind of separating brake method of the high-pressure vacuum breaker long-stroke permanent magnet operating mechanism with ancillary coil: when permanent magnet holding mechanism (2), electromagnetic drive mechanism (3) receive sub-gate signal, startup-buffer coil (13), auxiliary switching winding (7) pass into same direction current simultaneously, produce magnetomotive force; The magnetic fields that startup-buffer coil (13) produces is in driving dynamic (16) unshakable in one's determination; The electromagnetic field that auxiliary switching winding (7) produces is contrary with the permanent magnetic field direction that combined floodgate permanent magnet (6) produces, and the confining force that maintenance dynamic (10) unshakable in one's determination is subject to reduces rapidly; Along with electric current increases, when electric current reaches certain value, the downward electromagnetic force that startup-buffer coil (13) produces is greater than the confining force upwards that combined floodgate permanent magnet (6) produces with auxiliary switching winding (7) resultant magnetic field, now drive dynamic (16) unshakable in one's determination to move downward, now switching winding (14) passes into the electric current identical with starting-buffer coil (13) direction; When the upper surface driving dynamic (16) upper surface unshakable in one's determination lower than fixed core between closing coil (12) and startup-buffer coil (13), the magnetic field that startup-buffer coil (13) electric current produces starts to hinder driving dynamic (16) unshakable in one's determination to move downward, thus realizes driving the deceleration buffer effect moving (16) unshakable in one's determination; When driving dynamic iron core to reach the lower end limit, startup-buffer coil and switching winding stop energising simultaneously.
Preferred: described auxiliary switching-in coil (8) is open-circuit condition in separating brake process.
Beneficial effect: a kind of high-pressure vacuum breaker long-stroke permanent magnet operating mechanism with ancillary coil provided by the invention, compared to existing technology, has following beneficial effect:
The present invention is directed to three-winding permanent magnet mechanism maintaining body and be separated the feature that the magnetic circuit that causes is separated with operating mechanism, auxiliary separating closing coil is added in permanent magnet holding mechanism, weak magnetic is carried out to permanent magnetic field, shortens the start-up time of divide-shut brake fast, improve the response speed of operating mechanism.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention at closing position;
Fig. 2 a is the magnetic flux path figure of the present invention at closing position;
Magnetic flux path figure when Fig. 2 b is separating brake process of the present invention startup;
Fig. 2 c is the magnetic flux path figure of separating brake process latter end of the present invention buffering;
Fig. 2 d is the magnetic flux path figure of open position of the present invention;
In figure: 1 guide rod, 2 permanent magnet holding mechanisms, 3 electromagnetic drive mechanisms, 4 opening-cores, 5 closing-cores, 6 combined floodgate permanent magnets, 7 auxiliary switching windings, 8 auxiliary switching-in coils, 9 separating brake permanent magnets, 10 keep dynamic iron core, 11 nonmagnetic substance pads, 12 closing coils, 13 startup-buffer coils, 14 switching windings, 15 driving fixed cores, 16 to drive dynamic unshakable in one's determination; Dotted line is the magnetic line of force that coil produces, and solid line is the magnetic line of force that permanent magnet produces.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
With a high-pressure vacuum breaker long-stroke permanent magnet operating mechanism for ancillary coil, as shown in Figure 1, comprise permanent magnet holding mechanism 2, electromagnetic drive mechanism 3 and guide rod 1,
Described permanent magnet holding mechanism 2 comprises top permanent magnet holding mechanism and bottom permanent magnet holding mechanism, described top permanent magnet holding mechanism and bottom permanent magnet holding mechanism are oppositely arranged, and be provided with maintenance dynamic unshakable in one's determination 10 between described top permanent magnet holding mechanism and bottom permanent magnet holding mechanism, and the unshakable in one's determination 10 middle centre bores be provided with for location guide 1 are moved in described maintenance; Described top permanent magnet holding mechanism comprises opening-core 4, combined floodgate permanent magnet 6, auxiliary switching winding 7, keeps dynamic unshakable in one's determination 10; Described combined floodgate permanent magnet 6, auxiliary switching winding 7 are arranged at opening-core 4 inside, and described auxiliary switching winding 7 is arranged at the downside of combined floodgate permanent magnet 6; Described bottom permanent magnet holding mechanism comprises closing-core 5, auxiliary switching-in coil 8, separating brake permanent magnet 9, and it is inner that described auxiliary switching-in coil 8, separating brake permanent magnet 9 are arranged at closing-core 5, and described auxiliary switching-in coil 8 is positioned at the downside of separating brake permanent magnet 9; Described opening-core 4 comprises the first opening-core and the second opening-core that are oppositely arranged, described first opening-core and the second opening-core offer the first mounting groove of coupling mutually, and described combined floodgate permanent magnet 6, auxiliary switching winding 7 are arranged in the first mounting groove.
Described electromagnetic drive mechanism 3 comprises closing coil 12, startup-buffer coil 13, switching winding 14, drives fixed core 15, drives dynamic unshakable in one's determination 16; Described driving is moved unshakable in one's determination 16 and is arranged in driving fixed core 15, and is slidably connected between described driving dynamic unshakable in one's determination 16 and driving fixed core 15; Described driving fixed core 15 inside is provided with first, second, third coil groove from top to bottom, and the opening of described first, second, third coil groove is all towards dynamic 16 sides unshakable in one's determination of driving, and described closing coil 12 is positioned in First Line ring recess, startup-buffer coil 13 is positioned in the second coil groove, and switching winding 14 is positioned in tertiary coil groove; Described closing-core 5 comprises the first closing-core and the second closing-core, described first closing-core and the second closing-core offer the second mounting groove of coupling mutually, and described auxiliary switching-in coil 8, separating brake permanent magnet 9 are arranged in the second mounting groove.
Nonmagnetic substance pad 11 is provided with between described permanent magnet holding mechanism 2 and electromagnetic drive mechanism 3; Described guide rod 1 is from top to bottom successively through top permanent magnet holding mechanism, bottom permanent magnet holding mechanism, nonmagnetic substance pad 11 and driving fixed core 15, and with top permanent magnet holding mechanism, bottom permanent magnet holding mechanism, nonmagnetic substance pad 11 and drive fixed core 15 to be slidably connected, simultaneously described guide rod 1 respectively with keep the dynamic centre bore of unshakable in one's determination 10, drive dynamic iron core 16 to be fixedly connected with.
Described maintenance is moved unshakable in one's determination 10 for radius and is greater than the solid disk of combined floodgate permanent magnet 6 and separating brake permanent magnet 9 external diameter.
The shape of described permanent magnet holding mechanism 2, electromagnetic drive mechanism 3 can be columniform or cuboid.
Described auxiliary switching winding 7 is identical with the internal-and external diameter of combined floodgate permanent magnet 6, and auxiliary switching-in coil 8 is identical with the internal-and external diameter of separating brake permanent magnet 9.
A kind of separating brake method of the high-pressure vacuum breaker long-stroke permanent magnet operating mechanism with ancillary coil: as shown in Figure 2, when permanent magnet holding mechanism 2, electromagnetic drive mechanism 3 receive sub-gate signal, startup-buffer coil 13, auxiliary switching winding 7 pass into same direction current simultaneously, produce magnetomotive force; The magnetic fields that startup-buffer coil 13 produces is in driving dynamic unshakable in one's determination 16; The electromagnetic field that auxiliary switching winding 7 produces is contrary with the permanent magnetic field direction that combined floodgate permanent magnet 6 produces, and makes maintenance move unshakable in one's determination 10 confining forces be subject to and reduces rapidly; Along with electric current increases, when electric current reaches certain value, the downward electromagnetic force that startup-buffer coil 13 produces is greater than the confining force upwards that combined floodgate permanent magnet 6 produces with auxiliary switching winding 7 resultant magnetic field, now drive dynamic unshakable in one's determination 16 to move downward, now switching winding 14 passes into and starts-identical the electric current in buffer coil 13 direction; When the upper surface driving dynamic 16 upper surfaces unshakable in one's determination lower than fixed core between closing coil 12 and startup-buffer coil 13, the magnetic field that startup-buffer coil 13 electric current produces starts to hinder driving dynamic unshakable in one's determination 16 to move downward, thus realizes driving the deceleration buffer effect moving unshakable in one's determination 16; When driving dynamic iron core to reach the lower end limit, startup-buffer coil and switching winding stop energising simultaneously.
It is to be noted, when keeping dynamic iron core 10 gradually near auxiliary switching-in coil 8, auxiliary switching-in coil 8 can respond to the magnetic field that generation current offsets the generation of separating brake permanent magnet 9, and mechanism cannot remain on gate-dividing state, therefore, auxiliary switching-in coil 8 must be kept to open a way in separating brake process.
Due to the symmetry of structure, making process and separating brake process similar, repeat no more herein.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. the long-stroke permanent magnet operating mechanism of the high-pressure vacuum breaker with ancillary coil, comprises permanent magnet holding mechanism (2), electromagnetic drive mechanism (3) and guide rod (1), it is characterized in that:
Described permanent magnet holding mechanism (2) comprises top permanent magnet holding mechanism and bottom permanent magnet holding mechanism, described top permanent magnet holding mechanism and bottom permanent magnet holding mechanism are oppositely arranged, and be provided with maintenance dynamic (10) unshakable in one's determination between described top permanent magnet holding mechanism and bottom permanent magnet holding mechanism, and described maintenance dynamic (10) the unshakable in one's determination middle centre bore be provided with for location guide (1); Described top permanent magnet holding mechanism comprises opening-core (4), combined floodgate permanent magnet (6), auxiliary switching winding (7), keeps dynamic (10) unshakable in one's determination; Described combined floodgate permanent magnet (6), auxiliary switching winding (7) are arranged at opening-core (4) inside, and described auxiliary switching winding (7) is arranged at the downside of combined floodgate permanent magnet (6); Described bottom permanent magnet holding mechanism comprises closing-core (5), auxiliary switching-in coil (8), separating brake permanent magnet (9), it is inner that described auxiliary switching-in coil (8), separating brake permanent magnet (9) are arranged at closing-core (5), and described auxiliary switching-in coil (8) is positioned at the downside of separating brake permanent magnet (9);
Described electromagnetic drive mechanism (3) comprises closing coil (12), startup-buffer coil (13), switching winding (14), drives fixed core (15), drives dynamic (16) unshakable in one's determination; Described driving is moved (16) unshakable in one's determination and is arranged in driving fixed core (15), and is slidably connected between described driving dynamic (16) unshakable in one's determination and driving fixed core (15); Described driving fixed core (15) inside is provided with first, second, third coil groove from top to bottom, and the opening of described first, second, third coil groove is all towards dynamic (16) side unshakable in one's determination of driving, and described closing coil (12) is positioned in First Line ring recess, startup-buffer coil (13) is positioned in the second coil groove, and switching winding (14) is positioned in tertiary coil groove;
Nonmagnetic substance pad (11) is provided with between described permanent magnet holding mechanism (2) and electromagnetic drive mechanism (3); Described guide rod (1) is from top to bottom successively through top permanent magnet holding mechanism, bottom permanent magnet holding mechanism, nonmagnetic substance pad (11) and driving fixed core (15), and with top permanent magnet holding mechanism, bottom permanent magnet holding mechanism, nonmagnetic substance pad (11) and drive fixed core (15) to be slidably connected, simultaneously described guide rod (1) respectively with keep the centre bore of dynamic (10) unshakable in one's determination, drive dynamic iron core (16) to be fixedly connected with.
2. the high-pressure vacuum breaker long-stroke permanent magnet operating mechanism of band ancillary coil according to claim 1, it is characterized in that: described opening-core (4) comprises the first opening-core and the second opening-core that are oppositely arranged, described first opening-core and the second opening-core offer the first mounting groove of coupling mutually, and described combined floodgate permanent magnet (6), auxiliary switching winding (7) are arranged in the first mounting groove; Described closing-core (5) comprises the first closing-core and the second closing-core, described first closing-core and the second closing-core offer the second mounting groove of coupling mutually, and described auxiliary switching-in coil (8), separating brake permanent magnet (9) are arranged in the second mounting groove.
3. the high-pressure vacuum breaker long-stroke permanent magnet operating mechanism of band ancillary coil according to claim 3, is characterized in that: described maintenance dynamic unshakable in one's determination (10) is greater than the solid disk of combined floodgate permanent magnet (6) and separating brake permanent magnet (9) external diameter for radius.
4. the high-pressure vacuum breaker long-stroke permanent magnet operating mechanism of band ancillary coil according to claim 4, is characterized in that: the shape of described permanent magnet holding mechanism (2), electromagnetic drive mechanism (3) can be columniform or cuboid.
5. the high-pressure vacuum breaker long-stroke permanent magnet operating mechanism of band ancillary coil according to claim 5, it is characterized in that: described auxiliary switching winding (7) is identical with the internal-and external diameter of combined floodgate permanent magnet (6), and auxiliary switching-in coil (8) is identical with the internal-and external diameter of separating brake permanent magnet (9).
6. the separating brake method based on the high-pressure vacuum breaker long-stroke permanent magnet operating mechanism of band ancillary coil according to claim 1, it is characterized in that: when permanent magnet holding mechanism (2), electromagnetic drive mechanism (3) receive sub-gate signal, startup-buffer coil (13), auxiliary switching winding (7) pass into same direction current simultaneously, produce magnetomotive force; The magnetic fields that startup-buffer coil (13) produces is in driving dynamic (16) unshakable in one's determination; The electromagnetic field that auxiliary switching winding (7) produces is contrary with the permanent magnetic field direction that combined floodgate permanent magnet (6) produces, and the confining force that maintenance dynamic (10) unshakable in one's determination is subject to reduces rapidly; Along with electric current increases, when electric current reaches certain value, the downward electromagnetic force that startup-buffer coil (13) produces is greater than the confining force upwards that combined floodgate permanent magnet (6) produces with auxiliary switching winding (7) resultant magnetic field, now drive dynamic (16) unshakable in one's determination to move downward, now switching winding (14) passes into the electric current identical with starting-buffer coil (13) direction; When the upper surface driving dynamic (16) upper surface unshakable in one's determination lower than fixed core between closing coil (12) and startup-buffer coil (13), the magnetic field that startup-buffer coil (13) electric current produces starts to hinder driving dynamic (16) unshakable in one's determination to move downward, thus realizes driving the deceleration buffer effect moving (16) unshakable in one's determination; When driving dynamic iron core to reach the lower end limit, startup-buffer coil and switching winding stop energising simultaneously.
7. the separating brake method of the high-pressure vacuum breaker long-stroke permanent magnet operating mechanism of band ancillary coil according to claim 6, is characterized in that: described auxiliary switching-in coil (8) is open-circuit condition in separating brake process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510281850.8A CN104851740B (en) | 2015-05-28 | 2015-05-28 | A kind of long-stroke permanent magnet operating mechanism of the high-pressure vacuum breaker with ancillary coil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510281850.8A CN104851740B (en) | 2015-05-28 | 2015-05-28 | A kind of long-stroke permanent magnet operating mechanism of the high-pressure vacuum breaker with ancillary coil |
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| CN104851740A true CN104851740A (en) | 2015-08-19 |
| CN104851740B CN104851740B (en) | 2017-06-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105280432A (en) * | 2015-10-09 | 2016-01-27 | 东南大学 | Long-stroke permanent magnet operating mechanism with magnetic bridge and auxiliary weak magnetic coil for high-voltage vacuum circuit breaker |
| CN105304402A (en) * | 2015-10-23 | 2016-02-03 | 东南大学 | Combined-type long-stroke high-voltage monostable permanent magnetic operating mechanism and opening and closing method |
| CN105762010A (en) * | 2016-04-26 | 2016-07-13 | 国家电网公司 | High-speed switch based on permanent magnet holding mechanism |
| CN107086164A (en) * | 2016-02-16 | 2017-08-22 | Ls 产电株式会社 | By-pass switch |
| CN114526342A (en) * | 2022-01-13 | 2022-05-24 | 中科首望无水染色智能装备(苏州)有限公司 | Long-range electromagnetic sealing flash explosion device and working method |
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| CN201975320U (en) * | 2011-04-12 | 2011-09-14 | 浙宝开关(杭州)有限公司 | Permanent-magnet repulsion mechanism |
| CN104167326A (en) * | 2014-07-30 | 2014-11-26 | 东南大学 | Three-coil permanent magnet mechanism used for high-voltage vacuum circuit breaker |
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| DE4304921C1 (en) * | 1993-02-18 | 1994-08-25 | E I B S A | Bistable magnetic drive for an electrical switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105280432A (en) * | 2015-10-09 | 2016-01-27 | 东南大学 | Long-stroke permanent magnet operating mechanism with magnetic bridge and auxiliary weak magnetic coil for high-voltage vacuum circuit breaker |
| CN105304402A (en) * | 2015-10-23 | 2016-02-03 | 东南大学 | Combined-type long-stroke high-voltage monostable permanent magnetic operating mechanism and opening and closing method |
| CN107086164A (en) * | 2016-02-16 | 2017-08-22 | Ls 产电株式会社 | By-pass switch |
| CN105762010A (en) * | 2016-04-26 | 2016-07-13 | 国家电网公司 | High-speed switch based on permanent magnet holding mechanism |
| CN114526342A (en) * | 2022-01-13 | 2022-05-24 | 中科首望无水染色智能装备(苏州)有限公司 | Long-range electromagnetic sealing flash explosion device and working method |
| CN114526342B (en) * | 2022-01-13 | 2023-09-08 | 中科首望无水染色智能装备(苏州)有限公司 | Long-range electromagnetic sealing flash explosion device and working method |
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