CN113241267B - Quick opening/closing electromagnetic repulsion mechanism and quick opening/closing switch - Google Patents
Quick opening/closing electromagnetic repulsion mechanism and quick opening/closing switch Download PDFInfo
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- CN113241267B CN113241267B CN202110333143.4A CN202110333143A CN113241267B CN 113241267 B CN113241267 B CN 113241267B CN 202110333143 A CN202110333143 A CN 202110333143A CN 113241267 B CN113241267 B CN 113241267B
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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
- H01H33/02—Details
- H01H33/42—Driving mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
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Abstract
The invention provides a rapid opening/closing electromagnetic repulsion mechanism and a rapid opening/closing switch, wherein the rapid opening/closing electromagnetic repulsion mechanism comprises: a transmission rod; an induction disc; the repulsion coil is only provided with one repulsion coil, and generates opening repulsion or closing repulsion to the induction disc; a plurality of electromagnetic coils; in the switching-on and switching-off process, at least one of the electromagnetic coils is an accelerating coil and at least one of the electromagnetic coils is a decelerating coil, the accelerating coil is electrified before the induction disc reaches a half position of the coil, and the decelerating coil is electrified only when the induction disc reaches the half position of the coil. The invention meets the requirement of a specific use occasion through one repulsion coil, meets the requirement of only needing higher opening speed or closing speed, can reduce the cost and simplify the structure. Meanwhile, the induction disc is accelerated by the accelerating coil, the integral opening and closing time is shortened, the induction disc is decelerated by the decelerating coil in the later stage, the phenomenon that the arc extinguish chamber or the operating mechanism body is impacted due to overlarge speed is avoided, and the service life is ensured.
Description
Technical Field
The invention relates to the technical field of high-voltage switch equipment, in particular to a rapid opening/closing electromagnetic repulsion mechanism and a rapid opening/closing switch.
Background
The existing mechanism of the rapid mechanical switch adopts a repulsion mechanism, the mechanism comprises a charger, an energy storage capacitor, a thyristor, a repulsion coil and a repulsion plate, and a moving end component comprises a moving contact, a moving contact seat and a transmission rod which drives the moving contact to move along the opening and closing direction. After a switch is powered on, a charger charges an energy storage capacitor and a buffer capacitor which are used for switching on and off, when the switch is switched on, a system receives a switch-on command and triggers a thyristor which controls discharge, the thyristor is switched on, current discharges to a switch-on repulsion coil through the thyristor, the repulsion coil generates force moving in the opposite direction due to the eddy current effect, and therefore the repulsion coil is pushed to drive a transmission shaft to move, the switch-on motion is achieved, and at the end of a stroke, the buffer coil is required to be involved to reduce the speed. When the system is in brake-off, the system receives a brake-off command to trigger a brake-off thyristor, the current of a brake-off repulsion coil generates vortex on a repulsion plate, and then the repulsion force pushing the repulsion plate to perform brake-off motion is generated, and at the end of a stroke, a buffer coil is required to be involved to decelerate the repulsion plate, so that the impact on the bottom is reduced.
The existing quick switch is limited by small-stroke on-off, still has the principle defect that the existing quick switch cannot exceed large-stroke on-off, and limits the development of the quick switch to the direction of large opening distance. On the premise of ensuring rapid opening and closing, various rapid switches are continuously developed towards a large stroke and an effective buffering direction, so that the intervention of peripheral hydraulic mechanical buffering is reduced, the mechanical structure tends to be simpler, and the reliability is improved, which becomes the design idea of the rapid mechanical switch.
In contrast, chinese patent application with application publication No. CN111415830A discloses an electromagnetic repulsion operating mechanism and a switch using the same, wherein the electromagnetic repulsion operating mechanism includes a transmission rod for transmission connection with a switch moving contact, a repulsion plate (i.e. an induction plate) is fixedly disposed on the transmission rod, an opening repulsion coil and a closing repulsion coil disposed at two axial sides of the repulsion plate, and at least one accelerating coil disposed between the opening and closing repulsion coils and surrounding the outer side of the repulsion plate to form a moving channel for axial movement of the repulsion plate therein, and current introduced into the accelerating coil can provide axial electromagnetic force to the repulsion plate, thereby increasing the moving speed of the repulsion plate and further increasing the opening and closing speed of the fast mechanical switch.
The electromagnetic repulsion operating mechanism has two problems in specific application: firstly, all the accelerating coils can only accelerate the opening and closing movement of the repulsion plate, so that the speed of the repulsion plate at the last stage of the opening and closing stroke is overlarge, great impact is caused on the arc extinguish chamber and the operating mechanism body, and the service lives of the arc extinguish chamber and the operating mechanism body are influenced; and secondly, the mechanism is provided with a brake-opening repulsive coil and a brake-closing repulsive coil, but for some quick switches, the application occasions of the mechanism are limited to only need higher brake-opening speed or only need higher brake-closing speed, and the other repulsive coil is not fully utilized at the moment, so that the resource waste is caused, particularly, the repulsive coil needs to be provided with an energy storage capacitor and a thyristor control circuit, the cost is higher, the manufacturing cost of the mechanism is increased, the structure of the mechanism is more complex, and the assembly difficulty is increased.
Disclosure of Invention
The invention aims to provide a rapid opening/closing electromagnetic repulsion mechanism which can reduce opening and closing impact, and can meet the requirement that only higher opening speed or only higher closing speed is needed to adapt to the requirement of a specific use occasion; the invention also aims to provide a rapid opening/closing switch which can reduce the opening/closing impact and meet the requirement that only a higher opening speed or a higher closing speed is needed to adapt to the requirement of a specific use occasion.
In order to achieve the purpose, the quick opening/closing electromagnetic repulsion mechanism adopts the following technical scheme:
a quick opening/closing electromagnetic repulsion mechanism comprises:
the transmission rod is in transmission connection with a moving contact in the arc extinguish chamber;
the induction disc is fixed on the transmission rod;
the quick opening/closing electromagnetic repulsion mechanism further comprises:
the repulsion coil is arranged at one axial side of the induction disc so as to generate opening repulsion force only for the induction disc or closing repulsion force only for the induction disc;
the repulsion coil control circuit is connected with the repulsion coil and is used for controlling the electrification and the outage of the repulsion coil;
the electromagnetic coils are arranged on one side of the repulsion coil and are arranged on the motion path of the induction disc so as to allow the induction disc and the transmission rod to penetrate through;
the electromagnetic coil control circuits are provided with a plurality of electromagnetic coils which are connected with each electromagnetic coil in a one-to-one correspondence manner so as to control the energization and the deenergization of the electromagnetic coils;
in the switching-on and switching-off process, at least one of the electromagnetic coils is an accelerating coil, and the accelerating coil is electrified only before the induction disc reaches a half position of the accelerating coil, so that the induction disc is moved by an accelerating force before reaching the half position of the accelerating coil and moved by inertia after passing through the half position of the accelerating coil;
in the opening and closing process, at least one of the electromagnetic coils is a speed reducing coil, and the speed reducing coil starts to be electrified only when the induction disc reaches a half position of the speed reducing coil, so that the induction disc moves by means of inertia before reaching the half position of the speed reducing coil and moves by speed reducing force after passing through the half position of the speed reducing coil.
The beneficial effects of the above technical scheme are that: the mechanism only comprises one repulsion coil, the repulsion coil is positioned at one axial side of the induction disc, only the opening repulsion force is generated for the induction disc or only the closing repulsion force is generated for the induction disc, the requirement of a specific use occasion can be met, the use requirement that only the opening speed is high or only the closing speed is high is met, the specific requirement is met through the repulsion coil, the resource waste caused when two repulsion coils are configured is avoided, the configuration of a control circuit can be reduced, the cost can be reduced, the structure of the mechanism can be simplified, and the assembly and the manufacture are convenient.
In addition, the mechanism of the invention also comprises a plurality of electromagnetic coils, in the switching-on and switching-off process, at least one of the electromagnetic coils is an accelerating coil, and the accelerating coil is electrified only before the induction disc reaches a half position of the accelerating coil, so that the induction disc is moved by an accelerating force before reaching the half position of the accelerating coil and moved by inertia after passing through the half position of the accelerating coil; at least one of the electromagnetic coils is a speed reducing coil, and the speed reducing coil starts to be electrified only when the induction disk reaches a half position of the speed reducing coil, so that the induction disk moves by inertia before reaching the half position of the speed reducing coil and moves by a speed reducing force after passing through the half position of the speed reducing coil.
The principle of the electromagnetic coil cannon is utilized, because when the induction disc passes through the electromagnetic coil, if the electromagnetic coil is electrified all the time, the first half section can generate acceleration force on the induction disc, and the second half section can generate resistance force on the induction disc. Therefore, the invention can control the power-on and power-off time of the electromagnetic coil through the electromagnetic coil control circuit, so that the electromagnetic coil is powered on only before the induction disc reaches the half position of the electromagnetic coil to form an accelerating coil, and in addition, the electromagnetic coil is powered on only when the induction disc reaches the half position of the electromagnetic coil to form a decelerating coil, so that in the process of opening and closing, the induction disc is accelerated by using the accelerating coil, the whole opening and closing time is shortened, meanwhile, the induction disc is decelerated by using the decelerating coil in the later stage of opening and closing, the phenomenon that the speed is overlarge to impact an arc extinguish chamber or an operating mechanism body is avoided, and the service lives of the operating mechanism and the arc extinguish chamber are ensured.
Furthermore, in order to adapt to the application occasions only needing higher opening speed and take the closing speed into consideration, the repulsion coil is an opening repulsion coil, and the number of the accelerating coils is larger than that of the decelerating coils in the closing process.
Furthermore, in order to enable the use design of the accelerating coils and the decelerating coils to be more reasonable in the brake separating process, the number of the accelerating coils is equal to or less than that of the decelerating coils in the brake separating process.
Furthermore, in order to adapt to the application occasions only needing higher closing speed and considering the opening speed, the repulsion coil is a closing repulsion coil, and the number of the accelerating coils is larger than that of the decelerating coils in the opening process.
Furthermore, in order to enable the use and design of the accelerating coils and the decelerating coils to be more reasonable in the switching-on process, the number of the accelerating coils is equal to or less than that of the decelerating coils in the switching-on process.
Furthermore, in order to facilitate the movement of the induction disc and the arrangement of the electromagnetic coils, the rapid opening/closing electromagnetic repulsion mechanism further comprises a cylinder body fixedly connected with the arc extinguish chamber, the repulsion coil is arranged at the end of the cylinder body, each electromagnetic coil is sleeved and fixed outside the cylinder body, the transmission rod and the induction disc are arranged in the cylinder body, and the induction disc is movably matched with the inner wall of the cylinder body in a guiding manner.
Furthermore, in order to simplify the structure and facilitate the manufacture, the induction disc is fixed at the end part of the transmission rod.
Furthermore, in order to improve the acceleration effect and optimize the power-on time, at least two acceleration coils are arranged in the switching-on and switching-off process, the acceleration coils comprise an early acceleration coil for the induction disc to pass through firstly and a later acceleration coil for the induction disc to pass through later, and the later acceleration coil starts to be powered on when the induction disc is about to leave the early acceleration coil.
Furthermore, in order to conveniently control the energization and the outage of the coil, the repulsion coil control circuit and the electromagnetic coil control circuit both comprise an energy storage capacitor and a thyristor.
In order to achieve the purpose, the quick opening/closing switch adopts the following technical scheme:
quick separating brake/combined floodgate switch, including explosion chamber and the moving contact of setting in the explosion chamber, quick separating brake/combined floodgate switch still includes quick separating brake/combined floodgate electromagnetism repulsion mechanism, and quick separating brake/combined floodgate electromagnetism repulsion mechanism includes:
the transmission rod is in transmission connection with the moving contact;
the induction disc is fixed on the transmission rod;
quick separating brake/closing electromagnetic repulsion mechanism still includes:
the repulsion coil is arranged at one axial side of the induction disc so as to generate opening repulsion force only for the induction disc or closing repulsion force only for the induction disc;
the repulsion coil control circuit is connected with the repulsion coil and is used for controlling the electrification and the outage of the repulsion coil;
the electromagnetic coils are arranged on one side of the repulsion coil and are arranged on the motion path of the induction disc so as to allow the induction disc and the transmission rod to penetrate through;
the electromagnetic coil control circuits are provided with a plurality of electromagnetic coils which are connected with each electromagnetic coil in a one-to-one correspondence manner so as to control the energization and the deenergization of the electromagnetic coils;
in the switching-on and switching-off process, at least one of the electromagnetic coils is an accelerating coil, and the accelerating coil is electrified only before the induction disc reaches a half position of the accelerating coil, so that the induction disc is moved by an accelerating force before reaching the half position of the accelerating coil and moved by inertia after passing through the half position of the accelerating coil;
in the switching-on and switching-off process, at least one of the electromagnetic coils is a speed reducing coil, and the speed reducing coil starts to be electrified only when the induction disc reaches the half position of the speed reducing coil, so that the induction disc moves by means of inertia before reaching the half position of the speed reducing coil and moves under the speed reducing force after passing through the half position of the speed reducing coil.
The beneficial effects of the above technical scheme are that: the mechanism only comprises one repulsion coil, the repulsion coil is positioned at one axial side of the induction disc, only a brake opening repulsion force is generated for the induction disc or only a brake closing repulsion force is generated for the induction disc, the requirement of a specific use occasion can be met, the use requirement that only a higher brake opening speed or only a higher brake closing speed is required is met, the specific requirement is met through the repulsion coil, so that the resource waste caused by the configuration of two repulsion coils is avoided, the configuration of a control circuit can be reduced, the cost can be reduced, the structure of the mechanism can be simplified, and the assembly and the manufacture are convenient.
In addition, the mechanism of the invention also comprises a plurality of electromagnetic coils, in the switching-on and switching-off process, at least one of the electromagnetic coils is an accelerating coil, and the accelerating coil is electrified only before the induction disc reaches a half position of the accelerating coil, so that the induction disc is moved by an accelerating force before reaching the half position of the accelerating coil and is moved by inertia after passing through the half position of the accelerating coil; at the same time, at least one of the electromagnetic coils is a deceleration coil, and the deceleration coil starts to be electrified only when the induction disk reaches a half position of the deceleration coil, so that the induction disk moves by inertia before reaching the half position of the deceleration coil and moves by deceleration force after passing through the half position of the deceleration coil.
The principle of the electromagnetic coil cannon is utilized, because when the induction disc passes through the electromagnetic coil, if the electromagnetic coil is electrified all the time, the first half section can generate acceleration force on the induction disc, and the second half section can generate resistance force on the induction disc. Therefore, the invention can control the power-on and power-off time of the electromagnetic coil through the electromagnetic coil control circuit, so that the electromagnetic coil is powered on only before the induction disc reaches the half position of the electromagnetic coil to form an accelerating coil, and in addition, the electromagnetic coil is powered on only when the induction disc reaches the half position of the electromagnetic coil to form a decelerating coil, so that in the process of opening and closing, the induction disc is accelerated by using the accelerating coil, the whole opening and closing time is shortened, meanwhile, the induction disc is decelerated by using the decelerating coil in the later stage of opening and closing, the phenomenon that the speed is overlarge to impact an arc extinguish chamber or an operating mechanism body is avoided, and the service lives of the operating mechanism and the arc extinguish chamber are ensured.
Furthermore, in order to adapt to the application occasions only needing higher opening speed and considering closing speed, the repulsion coil is an opening repulsion coil, and the number of the accelerating coils is larger than that of the decelerating coils in the closing process.
Furthermore, in order to enable the use and design of the accelerating coils and the decelerating coils to be more reasonable in the brake-separating process, the number of the accelerating coils is equal to or less than that of the decelerating coils in the brake-separating process.
Furthermore, in order to adapt to the application occasions only needing higher closing speed and considering the opening speed, the repulsion coil is a closing repulsion coil, and the number of the accelerating coils is larger than that of the decelerating coils in the opening process.
Furthermore, in order to enable the use and design of the accelerating coils and the decelerating coils to be more reasonable in the switching-on process, the number of the accelerating coils is equal to or less than that of the decelerating coils in the switching-on process.
Furthermore, in order to facilitate the movement of the induction disc and the arrangement of the electromagnetic coils, the rapid opening/closing electromagnetic repulsion mechanism further comprises a cylinder body fixedly connected with the arc extinguish chamber, the repulsion coil is arranged at the end part of the cylinder body, each electromagnetic coil is sleeved and fixed outside the cylinder body, the transmission rod and the induction disc are arranged in the cylinder body, and the induction disc is movably matched with the inner wall of the cylinder body in a guiding manner.
Furthermore, in order to simplify the structure and facilitate the manufacture, the induction disc is fixed at the end part of the transmission rod.
Furthermore, in order to improve the acceleration effect and optimize the power-on time, at least two acceleration coils are provided in the switching-on and switching-off process, the acceleration coils comprise an initial acceleration coil for the induction disc to pass through firstly and a subsequent acceleration coil for the induction disc to pass through secondly, and the subsequent acceleration coil starts to be powered on when the induction disc is about to leave the initial acceleration coil.
Furthermore, in order to conveniently control the energization and the outage of the coil, the repulsion coil control circuit and the electromagnetic coil control circuit both comprise an energy storage capacitor and a thyristor.
Drawings
Fig. 1 is a perspective view of a fast opening/closing switch according to an embodiment 1 of the present invention;
fig. 2 (a) is a structural diagram of the fast opening/closing switch of the present invention in which embodiment 1 is in a closing acceleration process (the first electromagnetic coil is energized);
fig. 2 (b) is a structural diagram of the embodiment 1 of the rapid opening/closing switch of the present invention during the acceleration of closing (the first electromagnetic coil starts to be de-energized);
fig. 3 (a) is a structural diagram of the fast opening/closing switch of embodiment 1 in the process of accelerating closing (the second electromagnetic coil starts to be energized);
fig. 3 (b) is a structural diagram of the fast opening/closing switch of embodiment 1 in the process of accelerating closing (the second electromagnetic coil starts to be de-energized);
fig. 4 (a) is a structural diagram of the fast opening/closing switch of embodiment 1 in the process of accelerating closing (the third electromagnetic coil starts to be energized);
fig. 4 (b) is a structural diagram of the embodiment 1 of the rapid opening/closing switch of the present invention during the acceleration of closing (the third electromagnetic coil starts to be de-energized);
fig. 5 (a) is a structural diagram of the embodiment 1 of the rapid opening/closing switch in the invention in a closing deceleration process (the fourth electromagnetic coil and the opening repulsion coil start to be electrified);
fig. 5 (b) is a structural diagram of the embodiment 1 of the fast opening/closing switch of the present invention when the switch is in the closed position;
fig. 6 (a) is a structural diagram of the embodiment 1 of the rapid opening/closing switch of the present invention during the opening acceleration (the fourth solenoid coil starts to be de-energized);
fig. 6 (b) is a structural diagram of the embodiment 1 of the rapid opening/closing switch of the present invention during the opening acceleration (the third electromagnetic coil starts to be de-energized);
fig. 6 (c) is a structural diagram of the embodiment 1 of the rapid opening/closing switch of the present invention in the opening deceleration process (the second electromagnetic coil starts to be energized);
fig. 6 (d) is a structural diagram of the fast opening/closing switch of embodiment 1 in the opening deceleration process (the first electromagnetic coil is energized);
fig. 7 is a perspective view of an embodiment 2 of the fast opening/closing switch of the present invention;
fig. 8 (a) is a structural diagram of an embodiment 2 of the rapid opening/closing switch of the present invention in a closing acceleration process (closing repulsive force coil and first electromagnetic coil start to be energized);
fig. 8 (b) is a structural view of an embodiment 2 of the rapid opening/closing switch of the present invention in a closing acceleration process (the first solenoid coil starts to be de-energized);
fig. 9 (a) is a structural view showing an embodiment 2 of the rapid opening/closing switch of the present invention in a closing acceleration process (the second solenoid coil starts to be de-energized);
fig. 9 (b) is a structural view of an embodiment 2 of the rapid opening/closing switch of the present invention in a closing deceleration process (the third solenoid coil starts to be energized);
fig. 9 (c) is a structural view showing a closing deceleration process (the fourth solenoid coil starts to be energized) in embodiment 2 of the rapid opening/closing switch of the present invention;
fig. 10 (a) is a structural view showing an embodiment 2 of the rapid opening/closing switch of the present invention in an opening acceleration process (the fourth solenoid coil starts to be de-energized);
fig. 10 (b) is a structural view showing an embodiment 2 of the rapid opening/closing switch of the present invention in an opening acceleration process (the third solenoid coil starts to be de-energized);
fig. 10 (c) is a structural view showing an embodiment 2 of the rapid opening/closing switch of the present invention in an opening acceleration process (the second solenoid coil starts to be de-energized);
fig. 10 (d) a structure diagram of an embodiment 2 of the rapid opening/closing switch of the present invention in the opening deceleration process (the first electromagnetic coil and the closing repulsive coil start to be energized).
In the figure: 1. a first electromagnetic coil; 2. a second electromagnetic coil; 3. a third electromagnetic coil; 4. a fourth electromagnetic coil; 5. a brake separating repulsion coil; 6. a first solenoid control circuit; 7. a second solenoid control circuit; 8. a third solenoid control circuit; 9. a fourth solenoid control circuit; 10. a brake separating repulsion coil control circuit; 11. a transmission rod; 12. a cylinder body; 13. an induction disc; 14. an arc extinguishing chamber; 15. closing repulsion coil; 16. closing repulsion coil control circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration only, not by way of limitation, i.e., the embodiments described are intended as a selection of the best mode contemplated for carrying out the invention, not as a full mode. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
An embodiment 1 of a fast opening/closing switch (hereinafter referred to as a switch) in the present invention is shown in fig. 1, where the switch includes an arc extinguish chamber 14 and a moving contact (not shown) disposed in the arc extinguish chamber 14, and the switch further includes a fast opening/closing electromagnetic repulsion mechanism (hereinafter referred to as an electromagnetic repulsion mechanism).
The electromagnetic repulsion mechanism includes: the arc extinguishing chamber induction device comprises a cylinder 12 fixedly connected with an arc extinguishing chamber 14, a transmission rod 11 in transmission connection with a moving contact in the arc extinguishing chamber 14, and an induction disc 13 fixed at the end part of the transmission rod 11, wherein the transmission rod 11 and the induction disc 13 are both arranged in the cylinder 12, and the induction disc 13 is in guide movement fit with the inner wall of the cylinder 12. The electromagnetic repulsion mechanism further comprises only one repulsion coil, the repulsion coil is located on one axial side of the induction disc 13, the repulsion coil in the embodiment is a brake-separating repulsion coil 5, the brake-separating repulsion coil 5 is arranged at the end of the cylinder 12 and located at a position close to the arc extinguishing chamber 14, and the transmission rod 11 penetrates through the brake-separating repulsion coil 5. The electromagnetic repulsion mechanism further comprises a brake separating repulsion coil control circuit 10 connected with the brake separating repulsion coil 5 and used for controlling the power-on and power-off of the brake separating repulsion coil 5, and the brake separating repulsion coil control circuit 10 specifically comprises an energy storage capacitor and a thyristor.
The electromagnetic repulsion mechanism further comprises four electromagnetic coils, each electromagnetic coil is located on one side of the opening repulsion coil 5 and arranged on a movement path of the induction disc 13, and each electromagnetic coil is sleeved and fixed outside the cylinder body 12, so that the induction disc 13 and the transmission rod 11 can penetrate through inner holes of the four electromagnetic coils.
Four electromagnetic coils are arranged at intervals in the axial direction of the cylinder body 12, which are the first electromagnetic coil 1, the second electromagnetic coil 2, the third electromagnetic coil 3, and the fourth electromagnetic coil 4, respectively. The electromagnetic repulsion mechanism also comprises four electromagnetic coil control circuits, each electromagnetic coil control circuit is connected with each electromagnetic coil in a one-to-one correspondence manner so as to control the electrification and the power failure of the electromagnetic coils, and the four electromagnetic coil control circuits are respectively as follows: the electromagnetic control device comprises a first electromagnetic coil control circuit 6 connected with a first electromagnetic coil 1, a second electromagnetic coil control circuit 7 connected with a second electromagnetic coil 2, a third electromagnetic coil control circuit 8 connected with a third electromagnetic coil 3, and a fourth electromagnetic coil control circuit 9 connected with a fourth electromagnetic coil 4, wherein each electromagnetic coil control circuit comprises an energy storage capacitor and a thyristor.
In addition, the electromagnetic repulsion mechanism further comprises a controller (not shown in the figure) respectively connected with the capacitor in each electromagnetic coil control circuit and the capacitor in the opening repulsion coil control circuit 10 in a control manner, and the electromagnetic repulsion mechanism further comprises a position sensor for detecting the motion position of the induction disc 13, and the position sensor is also connected with the controller so as to feed back the detection signal to the controller.
The working process of the switch of the invention is as follows:
when in a closing state, the accelerating stress mode is formed by sequentially discharging the capacitors connected with the first electromagnetic coil 1, the second electromagnetic coil 2 and the third electromagnetic coil 3 according to the sequence, and the decelerating stress mode is formed by the fourth electromagnetic coil 4 and the opening repulsion coil 5. The specific control logic is as follows:
after receiving the closing command, as shown in fig. 2 (a), the capacitor of the first electromagnetic coil 1 discharges, and at this time, the first electromagnetic coil 1 generates an electromagnetic attraction force on the inductive disc 13 to drive the inductive disc 13 to move forward (to the right in the drawing). According to the principle of the electromagnetic coil cannon, when the induction disc passes through the electromagnetic coil, if the electromagnetic coil is electrified all the time, the first half section can generate accelerating force on the induction disc, and the second half section can generate resistance on the induction disc. Therefore, in order to cause the first electromagnetic coil 1 to generate an accelerating force only on the inductive disk 13, that is, in order to cause the first electromagnetic coil 1 to function as an accelerating coil, it is necessary to cause the first electromagnetic coil 1 to be energized only before the inductive disk 13 reaches a half position of the first electromagnetic coil 1, and therefore, as shown in fig. 2 (b), when the leading end (one end in the moving direction is the leading end and the other end is the trailing end, and therefore the leading end is the right end at the time of closing) of the inductive disk 13 reaches a mark which is 1/2 of the width of the first electromagnetic coil 1, the capacitor is discharged completely, and thereafter the inductive disk 13 moves forward by inertia.
As shown in fig. 3 (a), when the head end of the sensing disc 13 goes to the tail end of the first electromagnetic coil 1, that is, when the sensing disc 13 is about to leave the first electromagnetic coil 1, the capacitance of the second electromagnetic coil 2 is discharged, at this time, the sensing disc 13 is attracted again for acceleration, and since the second electromagnetic coil 2 is used as an acceleration coil, the second electromagnetic coil 2 only generates an acceleration force on the sensing disc 13, so similarly to the first electromagnetic coil 1, the second electromagnetic coil 2 only needs to be energized before the sensing disc 13 reaches a half position of the second electromagnetic coil 2, as shown in fig. 3 (b), when the head end of the sensing disc 13 goes to 1/2 position of the second electromagnetic coil 2, that is, a mark position, the capacitance of the second electromagnetic coil 2 stops discharging, and thereafter, the sensing disc 13 continues to move forward due to inertia.
As shown in fig. 4 (a), when the head end of the inductive disk 13 is about to go out of the second electromagnetic coil 2, the capacitance of the third electromagnetic coil 3 starts to discharge, at this time, the inductive disk 13 is continuously accelerated by the electromagnetic attraction force again, the third electromagnetic coil 3 is also an accelerating coil, similarly to the first two accelerating coils, as shown in fig. 4 (b), when the head end of the inductive disk 13 goes to the central position of the third electromagnetic coil 3, i.e. the marked 1/2 position, the capacitance of the third electromagnetic coil 3 is completely discharged, and then the inductive disk 13 goes out of the third electromagnetic coil 3 by inertia.
After the induction disc 13 completely goes out of the third electromagnetic coil 3, the deceleration state is entered. Since the fourth electromagnetic coil 4 serves as a deceleration coil and generates a deceleration force only on the inductive disk 13, it is necessary to start energization of the fourth electromagnetic coil 4 only when the inductive disk 13 reaches a half position of the fourth electromagnetic coil 4, so that the inductive disk 13 moves by inertia before reaching the half position of the fourth electromagnetic coil 4 and moves by the deceleration force after passing through the half position of the fourth electromagnetic coil 4. Therefore, as shown in fig. 5 (a), when the end of the sensing disc 13 goes to the center position of the fourth electromagnetic coil 4, the capacitance of the fourth electromagnetic coil 4 starts to discharge, a force that hinders the forward movement of the sensing disc 13 is generated, and the whole mechanism starts to decelerate. When the inductive disc 13 completely goes out of the fourth electromagnetic coil 4, the capacitance of the opening repulsive coil 5 starts to discharge to generate repulsive force to act on the deceleration of the mechanism, and finally the mechanism is closed in place as shown in fig. 5 (b). The speed of moving to the terminal can be ensured to be very low by changing the capacitance and the voltage of the fourth electromagnetic coil 4 and the opening repulsive force coil 5, and the impact on a subsequent arc extinguish chamber is reduced.
Or, when the distance between the fourth electromagnetic coil 4 and the opening repulsive coil 5 is relatively short, when the end of the inductive disk 13 goes to the center position of the fourth electromagnetic coil 4, the capacitance of the fourth electromagnetic coil 4 and the capacitance of the opening repulsive coil 5 are discharged simultaneously, and a deceleration force is generated together.
In the above-mentioned closing process, the first electromagnetic coil 1, the second electromagnetic coil 2, and the third electromagnetic coil 3 of all the electromagnetic coils are used as accelerating coils, only the fourth electromagnetic coil 4 is used as a decelerating coil, and the number of accelerating coils is significantly larger than that of decelerating coils, so that the starting and accelerating of the induction disk 13 are all affected by the accelerating coils, and the decelerating action can be affected by the decelerating coils and the opening repulsive coils, so that the number of accelerating coils is designed to be larger.
Meanwhile, since the number of the acceleration coils is plural, the acceleration coil may be understood as including an early acceleration coil through which the induction disk 13 passes first and a late acceleration coil through which the induction disk 13 passes later, and the late acceleration coil starts to be energized when the induction disk 13 is about to leave the early acceleration coil. Of course, in other embodiments, the post-acceleration coil may be re-energized when the induction disc 13 is about to enter the post-acceleration coil.
And in the opening state, the accelerating stress mode is formed by sequentially discharging the capacitors connected with the opening repulsion coil 5, the fourth electromagnetic coil 4 and the third electromagnetic coil 3 according to the sequence, and the decelerating stress mode is formed by the second electromagnetic coil 2 and the first electromagnetic coil 1. The specific control logic is as follows:
after receiving the opening command, the thyristor of the opening repulsion coil 5 is conducted, the energy storage capacitor discharges through the opening repulsion coil 5, and at the moment, repulsion is generated to push the induction disc 13 to move towards the opening direction (leftwards in the figure). The fourth electromagnetic coil 4 is used as an accelerating coil, when the head end of the inductive disc 13 (the head end is the left end when the inductive disc is opened) goes to the head end of the fourth electromagnetic coil 4 along the opening direction, or when the head end of the inductive disc 13 is still a certain distance away from the fourth electromagnetic coil 4, the capacitor of the fourth electromagnetic coil 4 starts to discharge, and electromagnetic attraction force is generated to drive the inductive disc 13 to continue moving along the opening direction. Or after receiving a brake-off command, the capacitances of the brake-off repulsion coil 5 and the fourth electromagnetic coil 4 are discharged simultaneously to generate acting force on the induction disc 13 together.
As shown in fig. 6 (a), when the sensing plate 13 moves to the center of the fourth electromagnetic coil 4, i.e. 1/2 of the mark, the capacitance of the fourth electromagnetic coil 4 is discharged, and the sensing plate 13 continues to move forward by inertia. When the induction disc 13 goes out of the fourth electromagnetic coil 4, the thyristor of the third electromagnetic coil 3 is conducted, the energy storage capacitor starts to discharge, electromagnetic attraction is continuously generated to drive the induction disc 13 to perform accelerated opening movement, the third electromagnetic coil 3 serves as an acceleration coil, similarly to the fourth electromagnetic coil 4, as shown in fig. 6 (b), when the induction disc 13 goes to the center of the third electromagnetic coil 3, namely 1/2 of the marked position, the capacitor of the third electromagnetic coil 3 finishes discharging, and at this time, the induction disc 13 continuously moves forwards through inertia.
After the induction disc 13 exits the third electromagnetic coil 3, the mechanism starts to enter a deceleration state. When the induction disc 13 moves to the central position of the second electromagnetic coil 2, namely 1/2 of the marked position, in the opening direction, the energy storage capacitor thyristor of the second electromagnetic coil 2 starts to discharge, the generated force will block the motion of the induction disc 13, and the mechanism enters a deceleration state, as shown in fig. 6 (c). The first electromagnetic coil 1 also serves as a deceleration coil, and similarly to the second electromagnetic coil 2, as shown in fig. 6 (d), when the induction disk 13 moves to the central position of the first electromagnetic coil 1, i.e. 1/2 of the marked position, the energy storage capacitor of the first electromagnetic coil 1 starts to discharge, and continues to decelerate the mechanism. By adjusting the capacitance of the first electromagnetic coil 1 and the second electromagnetic coil 2 for damping and the capacitance of the voltage, the mechanism can be ideally decelerated.
In the opening process, the first electromagnetic coil 1 and the second electromagnetic coil 2 in all the electromagnetic coils are used as deceleration coils, the fourth electromagnetic coil 4 and the third electromagnetic coil 3 are used as acceleration coils, and the number of the acceleration coils is equal to that of the deceleration coils, so that the initial power can be provided for the induction disc 13 by considering the opening repulsion coil 5, and the number of the acceleration coils does not need to be too many.
In conclusion, in the switching-on and switching-off process of the switch, the power-on and power-off time of each electromagnetic coil is controlled, so that each electromagnetic coil forms an accelerating coil and a decelerating coil respectively, the accelerating coil is used for accelerating the induction disc, the integral switching-on and switching-off time is shortened, meanwhile, the decelerating coil is used for decelerating the induction disc in the later stage of switching-on and switching-off, the phenomenon that the arc extinguish chamber or the operating mechanism body is impacted due to overlarge speed is avoided, and the service lives of the operating mechanism and the arc extinguish chamber are ensured.
Meanwhile, only one repulsion coil is arranged in the embodiment, the repulsion coil is an opening repulsion coil, only opening repulsion is generated on the induction disc, the use requirement that only high opening speed is needed is met, the requirement of a specific use occasion can be met, and the number of the accelerating coils is reasonably designed, so that closing speed is also considered. Because the electromagnetic repulsion mechanism in the embodiment meets specific requirements through one repulsion coil, resource waste caused by the configuration of two repulsion coils is avoided, and the configuration of a control circuit can be reduced, so that the cost can be reduced, the structure of the mechanism can be simplified, and the assembly and the manufacture are convenient.
In a word, the switch adopting the electromagnetic repulsion mechanism can be quickly switched on and switched off at the highest speed, and the acceleration and deceleration coils can be used in a multi-stage superposition mode according to actual conditions, so that the electromagnetic repulsion mechanism can adapt to switches with different opening distances and strokes and can be quickly switched on and off, the switching-on and switching-off time of a large-stroke switch can be greatly reduced, the impact time of fault current on a power grid is reduced, and a foundation is laid for the stable operation of the whole power grid. Compared with the traditional product, the switch has the advantages that the light weight and the miniaturization are guaranteed powerfully, and the switch structure can be simplified due to the fact that the impact on the body is reduced. The product has more remarkable advantages in the aspects of cost, transportation, installation, maintenance, overhaul and the like, enhances the market competitiveness of the product, and provides a new theoretical method and thought for improving the opening and closing time of the large-stroke switch.
The electromagnetic repulsion mechanism also includes: the electromagnetic control device comprises a cylinder body 12, a transmission rod 11, an induction disc 13, a first electromagnetic coil 1, a second electromagnetic coil 2, a third electromagnetic coil 3, a fourth electromagnetic coil 4, a first electromagnetic coil control circuit 6, a second electromagnetic coil control circuit 7, a third electromagnetic coil control circuit 8 and a fourth electromagnetic coil control circuit 9, wherein the first electromagnetic coil control circuit, the second electromagnetic coil control circuit 7, the third electromagnetic coil control circuit 8 and the fourth electromagnetic coil control circuit 9 are respectively connected with the four electromagnetic coils in a one-to-one correspondence mode.
In addition, in the present embodiment, only one repulsive coil is provided, but it is different from embodiment 1 in that: the repulsion coil in this embodiment is a closing repulsion coil 15, and the closing repulsion coil 15 is located at one end of the cylinder 12 far away from the arc extinguish chamber 14. The electromagnetic repulsion mechanism further comprises a closing repulsion coil control circuit 16 connected with the closing repulsion coil 15 and used for controlling the power on and off of the closing repulsion coil 15, and the closing repulsion coil control circuit 16 also comprises an energy storage capacitor and a thyristor.
The working process of the switch in the embodiment is as follows:
in a closing state, the accelerating stress mode is formed by sequentially discharging capacitors connected with a closing repulsion coil 15, the first electromagnetic coil 1 and the second electromagnetic coil 2 according to a sequence, and the decelerating stress mode is formed by the third electromagnetic coil 3 and the fourth electromagnetic coil 4. The specific control logic is as follows:
after receiving the closing command, as shown in fig. 8 (a), the closing repulsive coil 15 and the thyristor of the first electromagnetic coil 1 are conducted to discharge capacitance, and the repulsive force formed by the eddy current generated by the induction disc and the attractive force generated by the first electromagnetic coil 1 are applied to the induction disc 13 at this time, so as to drive the induction disc 13 to accelerate and move forward. Of course, the capacitance of the closing repulsive coil 15 may be discharged first, and the capacitance of the first electromagnetic coil 1 may be discharged later. The first electromagnetic coil 1 is now used as an accelerating coil, and as shown in fig. 8 (b), when the sensing plate 13 goes to 1/2 of the width of the first electromagnetic coil 1, i.e., the center position, the capacitor discharge is completed, and thereafter the sensing plate 13 moves forward by inertia. When the sensing plate 13 is about to leave the first electromagnetic coil 1, the capacitance of the second electromagnetic coil 2 is discharged, the sensing plate 13 is accelerated by the attraction generated by the second electromagnetic coil 2 again, the second electromagnetic coil 2 is used as an acceleration coil, as shown in fig. 9 (a), when the sensing plate 13 goes to 1/2 of the width of the second electromagnetic coil 2, namely, the center position, the capacitance discharge is completed, and then the sensing plate 13 moves forward by inertia.
After the induction disk 13 moves out of the second electromagnetic coil 2, a deceleration state is performed. The third electromagnetic coil 3 is used as a deceleration coil, as shown in fig. 9 (b), when the end of the inductive disk 13 goes to the center position of the third electromagnetic coil 3, the capacitance of the third electromagnetic coil 3 discharges, the ampere force generated at this time will prevent the inductive disk from moving forward, and the whole mechanism starts to decelerate. Similarly to the third electromagnetic coil 3, the fourth electromagnetic coil 4 also serves as a deceleration coil, and as shown in fig. 9 (c), when the end of the induction disk 13 reaches the center position of the fourth electromagnetic coil 4, the capacitance of the fourth electromagnetic coil 4 is discharged, and deceleration is continued. The speed of moving to the terminal point is ensured to be very low by changing the capacitance and the voltage of the intervening buffer, and the impact on the subsequent arc extinguish chamber is reduced.
And in the opening state, the accelerating stress mode is formed by sequentially discharging the capacitors connected with the fourth electromagnetic coil 4, the third electromagnetic coil 3 and the second electromagnetic coil 2 according to the sequence, and the decelerating stress mode is formed by the first electromagnetic coil 1 and the closing repulsion coil 15. The specific control logic is as follows:
after receiving the opening command, the thyristor of the fourth electromagnetic coil 4 is turned on, the capacitor discharges through the fourth electromagnetic coil 4, an electromagnetic attraction force is generated on the electromagnetic coil to drive the induction disc 13 to move along the opening direction, the fourth electromagnetic coil 4, the third electromagnetic coil 3 and the second electromagnetic coil 2 are all used as accelerating coils, as shown in fig. 10 (a), when the induction disc 13 moves to the center position of the fourth electromagnetic coil 4, the capacitor discharges completely, and at this time, the induction disc 13 continues to move forward through inertia. When the induction disc 13 is going to go out of the fourth electromagnetic coil 4, the thyristor of the third electromagnetic coil 3 is conducted, the capacitor starts to discharge, and electromagnetic attraction is continuously generated to drive the induction disc to accelerate brake-separating movement. Similarly, as shown in fig. 10 (b), when the sensing plate 13 moves to the center position of the third electromagnetic coil 3, the capacitor is discharged, and the sensing plate 13 continues to move forward by inertia. When the induction disc 13 is going to go out of the third electromagnetic coil 3, the thyristor of the second electromagnetic coil 2 is conducted, the capacitor starts to discharge, and electromagnetic attraction is continuously generated to drive the induction disc to accelerate brake-separating movement. As shown in fig. 10 (c), when the sensing plate 13 moves to the center position of the second electromagnetic coil 2, the capacitor is discharged, and the sensing plate 13 continues to move forward by inertia.
After completely exiting the second solenoid 2, the mechanism starts to enter a deceleration state. The first electromagnetic coil 1 is used as a deceleration coil, as shown in fig. 10 (d), when the inductive disc 13 continues to move to the midpoint of the first electromagnetic coil 1 by inertia, the capacitance of the first electromagnetic coil 1 starts to discharge at this time, and the capacitance of the closing repulsion coil 15 also starts to discharge at this time, and the electromagnetic attraction force and the opposite repulsion force generated at this time jointly provide a deceleration force for the motion of the inductive disc. Of course, the capacitance of the first electromagnetic coil 1 may be discharged first, and the capacitance of the closing repulsive coil 15 may be discharged later.
The embodiment has the same technical effect as the embodiment 1, only one repulsion coil is arranged, and the repulsion coil is used for closing, so that closing repulsion is generated only for the induction disc, the use requirement of high closing speed is met, and the requirement of a specific use occasion can be met. In addition, the number of the accelerating coils is larger than that of the decelerating coils through reasonable design in the switching-off process, so that the switching-off speed is considered, the number of the accelerating coils is equal to that of the decelerating coils in the switching-on process, the accelerating and decelerating effects are optimized, the phenomenon that the arc extinguish chamber or the operating mechanism body is impacted due to overlarge speed is avoided, and the service lives of the operating mechanism and the arc extinguish chamber are ensured. The embodiment also meets specific requirements through one repulsion coil, thereby avoiding resource waste caused by the configuration of two repulsion coils, reducing the configuration of a control circuit, not only reducing the cost, but also simplifying the structure of the mechanism and facilitating assembly and manufacture.
In other embodiments of the fast opening/closing switch, the repulsive coil control circuit and the electromagnetic coil control circuit may also both include a power supply and a switch, and the controller controls the on and off of the switch to energize and de-energize the coil.
In other embodiments of the fast opening/closing switch, instead of detecting the movement position of the sensing plate by a position sensor, the time required for the sensing plate to reach different positions of the electromagnetic coil is calculated by parameters such as the width, number, interval, voltage and the like of the electromagnetic coil, so that the controller controls the corresponding electromagnetic coil to be powered on or powered off at different times.
In other embodiments of the rapid opening/closing switch, the number of the accelerating coils in the opening/closing process can be set to be more according to the requirement of the opening stroke, and is not limited to two or three, and the decelerating coils are also set in the same way.
In other embodiments of the quick opening/closing switch, the sensing plate may not be disposed at the end of the transmission rod, for example, the transmission rod may extend completely through the sensing plate.
In other embodiments of the fast opening/closing switch, the fast opening/closing electromagnetic repulsion mechanism may not include the cylinder, and since the transmission rod is in transmission connection with the moving contact in the arc extinguishing chamber, the transmission rod and the induction disc can be ensured to move stably to some extent.
In other embodiments of the fast opening/closing switch, when the repulsion coil is a closing repulsion coil, because the closing repulsion coil provides the initial closing power, the number of the accelerating coils in the closing process can also be smaller than the number of the decelerating coils, for example, three electromagnetic coils, one accelerating coil and two decelerating coils are provided.
In other embodiments of the fast opening/closing switch, when the repulsion coil is an opening repulsion coil, the number of the acceleration coils can be smaller than that of the deceleration coils in the opening process because the opening repulsion coil provides the opening initial power.
In other embodiments of the fast opening/closing switch, whether the repulsion coil is a closing repulsion coil or an opening repulsion coil, the number of the accelerating coils in each electromagnetic coil can also be equal to the number of the decelerating coils.
The embodiment of the rapid opening/closing electromagnetic repulsion mechanism comprises the following steps: the specific structure of the electromagnetic repulsion mechanism for fast opening/closing is the same as that of the electromagnetic repulsion mechanism for fast opening/closing in the above-mentioned embodiment of the fast opening/closing switch, and will not be repeated here.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all equivalent structural changes made by using the contents of the specification and the drawings of the present invention should be covered by the scope of the present invention.
Claims (9)
1. A quick opening/closing electromagnetic repulsion mechanism comprises:
the transmission rod (11) is used for being in transmission connection with a moving contact in the arc extinguish chamber (14);
the induction disc (13) is fixed on the transmission rod (11);
its characterized in that, quick separating brake/combined floodgate electromagnetism repulsion mechanism still includes:
the repulsion coil is arranged at one axial side of the induction disc (13) so as to generate opening repulsion to the induction disc (13) or closing repulsion to the induction disc (13);
the repulsion coil control circuit is connected with the repulsion coil and is used for controlling the electrification and the outage of the repulsion coil;
the electromagnetic coils are arranged on one side of the repulsion coil and are arranged on the motion path of the induction disc (13) so as to allow the induction disc (13) and the transmission rod (11) to pass through;
the electromagnetic coil control circuits are provided with a plurality of electromagnetic coils and are connected with each electromagnetic coil in a one-to-one correspondence manner so as to control the electrification and the outage of the electromagnetic coils;
in the switching-on and switching-off process, at least one of the electromagnetic coils is an accelerating coil, and the accelerating coil is electrified only before the induction disc (13) reaches the half position of the accelerating coil, so that the induction disc (13) is moved by an accelerating force before reaching the half position of the accelerating coil and moved by inertia after passing through the half position of the accelerating coil;
in the switching-on and switching-off process, at least one of the electromagnetic coils is a speed reducing coil, and the speed reducing coil starts to be electrified only when the induction disk (13) reaches the half position of the speed reducing coil, so that the induction disk (13) moves by means of inertia before reaching the half position of the speed reducing coil and moves under the speed reducing force after passing through the half position of the speed reducing coil;
the rapid opening/closing electromagnetic repulsion mechanism further comprises a barrel (12) fixedly connected with the arc extinguish chamber (14), repulsion coils are arranged at the end of the barrel (12), each electromagnetic coil is sleeved and fixed outside the barrel (12), the transmission rod (11) and the induction disc (13) are arranged in the barrel (12), and the induction disc (13) is in guiding movement fit with the inner wall of the barrel (12).
2. The electromagnetic repulsion mechanism for rapid opening/closing according to claim 1, characterized in that the repulsion coil is an opening repulsion coil (5), and the number of accelerating coils is larger than that of decelerating coils during closing.
3. The electromagnetic repulsion mechanism for rapid opening/closing according to claim 2, characterized in that the number of accelerating coils is equal to or less than the number of decelerating coils during opening.
4. The electromagnetic repulsion mechanism of rapid opening/closing according to claim 1, characterized in that the repulsion coil is closing repulsion coil (15), and the number of accelerating coils is larger than that of decelerating coils during opening.
5. The electromagnetic repulsion mechanism for rapid opening/closing according to claim 4, characterized in that the number of accelerating coils is equal to or less than the number of decelerating coils during closing.
6. The rapid opening/closing electromagnetic repulsion mechanism according to any one of claims 1 to 5, characterized in that the induction disc (13) is fixed at the end of the transmission rod (11).
7. The rapid opening/closing electromagnetic repulsion mechanism according to any one of claims 1 to 5, characterized in that there are at least two accelerating coils in the opening/closing process, the accelerating coils include an early accelerating coil for the induction disc (13) to pass through first and a late accelerating coil for the induction disc (13) to pass through later, and the late accelerating coil starts to be energized when the induction disc (13) is about to leave the early accelerating coil.
8. The rapid opening/closing electromagnetic repulsion mechanism according to any one of claims 1 to 5, characterized in that the repulsion coil control circuit and the electromagnetic coil control circuit both comprise an energy storage capacitor and a thyristor.
9. The fast opening/closing switch comprises an arc extinguish chamber (14) and a moving contact arranged in the arc extinguish chamber (14), and is characterized by further comprising the fast opening/closing electromagnetic repulsion mechanism according to any one of claims 1 to 8.
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