CN111739746B - Switch - Google Patents
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- CN111739746B CN111739746B CN202010706740.2A CN202010706740A CN111739746B CN 111739746 B CN111739746 B CN 111739746B CN 202010706740 A CN202010706740 A CN 202010706740A CN 111739746 B CN111739746 B CN 111739746B
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- 230000009471 action Effects 0.000 claims abstract description 71
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 230000008859 change Effects 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims description 88
- 238000007599 discharging Methods 0.000 claims description 25
- 230000014759 maintenance of location Effects 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 14
- 238000011161 development Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a switch. The switch includes: the switch assembly is used for executing the opening and closing actions of the circuit when the circuit works normally or fails; a drive mechanism comprising one or more drive coils for driving the action of the switch assembly; and a control circuit for controlling the current through the one or more drive coils and the rate of change thereof, wherein the current through the one or more drive coils and the rate of change thereof when the circuit is operating normally are less than the current through the one or more drive coils and the rate of change thereof when the circuit is malfunctioning. The number of the rapid opening and closing actions of the switch is reduced, so that the probability of fatigue damage is reduced, and the service life and the safety of the switch are ensured.
Description
Technical Field
The invention relates to the field of electric power, in particular to a switch.
Background
Along with the rapid development of industrialization and town, the power demand will continuously increase in a longer period. The development task of the power grid is heavy, and the development of the intelligent power distribution network is more urgent. The research and development of a new generation of high-reliability intelligent high-speed circuit breaker (or called a switch) can provide powerful technical guarantee for the safety and reliability of power supply of an intelligent power distribution network.
Conventionally, in order to secure the safety of the power grid, a fault circuit is cut off, and a circuit breaker is generally used to break the fault circuit. However, the switching-off speed is low, and a fault circuit is switched off within 30ms-40ms after an arc fault occurs, so that the switching equipment and personal safety cannot be protected in time.
In recent years, high-speed circuit breakers have also been driven by electromagnetic repulsion mechanisms. The electromagnetic repulsion mechanism has the advantages of simple structure, rapid action and convenience in electronic control, and can well meet the requirement of opening speed. However, the electromagnetic repulsion mechanism has high opening and closing movement speed and large impact force, and the service life and safety of the high-speed circuit breaker are reduced.
Disclosure of Invention
The invention aims to provide a switch which can solve the problems of service life reduction and safety reduction of a high-speed switch in the related technology.
According to one aspect of the present invention, there is provided a switch comprising: the switch assembly is used for executing the opening and closing actions of the circuit when the circuit works normally or fails; a drive mechanism comprising one or more drive coils for driving the action of the switch assembly; and a control circuit for controlling the current flowing through the one or more drive coils and the rate of change thereof, wherein the current and the rate of change thereof when the circuit is operating normally are less than the current and the rate of change thereof when the circuit is malfunctioning.
Preferably, the control circuit includes: one or more capacitors for discharging the one or more drive coils to generate the current; and one or more control switches in series with the one or more capacitors and the one or more drive coils for controlling discharge of the one or more capacitors to the one or more drive coils.
Preferably, the control circuit includes: a first capacitor C1, a second capacitor C2 and a third capacitor C3 for discharging a first coil L1, a second coil L2 and a third coil L3, respectively, wherein the first coil L1, the second coil L2 and the third coil L3 are connected in series and included in the driving coil, a first control switch K1 is connected in series with the first capacitor C1 and the first coil L1, a second control switch K2 is connected in series with the second capacitor C2 and the second coil L2, and a third control switch K3 is connected in series with the third capacitor C3 and the third coil L3, wherein the control circuit further comprises: a fourth capacitor C4 for discharging the driving coil, and a fourth control switch K4 connected in series with the fourth capacitor C4 and the fourth coil L4.
Preferably, the first coil L1, the second coil L2, and the third coil L3 are used for three-phase switching.
Preferably, the control circuit includes: a first control switch K1 and a first capacitor C1 connected in series, in the first control branch, for discharging the driving coil L; and a second control switch K4 and a fourth capacitor C4 connected in series, in a second control branch connected in parallel with the first control branch, for discharging the driving coil L, wherein a capacitance value of the fourth capacitor C4 is smaller than a capacitance value of the first capacitor C1.
Preferably, the control circuit includes: the first control switch K1 and the first driving coil L1 which are connected in series in the first control branch, the fourth control switch K4 and the fourth driving coil L4 which are connected in series in the second control branch which is connected in parallel with the first control branch, and a capacitor C which is used for discharging the first driving coil L1 or the fourth driving coil L4, wherein the inductance value of the fourth driving coil L4 is larger than that of the first driving coil L1.
Preferably, the control circuit further includes: one or more current limiting resistors in series with the one or more drive coils for reducing the current flowing through the one or more drive coils and the rate of change thereof.
Preferably, the control circuit includes: a capacitor C for discharging the driving coil L; a first control switch K1, in the first control branch, for controlling the discharge of the capacitor C to the driving coil L; and a fourth control switch K4 and a current limiting resistor R which are connected in series are used for controlling the discharge of the capacitor C to the driving coil L in a second control branch which is connected in parallel with the first control branch.
Preferably, the control circuit includes: a capacitor C for discharging the driving coil L; a first control switch K1 connected in series with the capacitor C and the driving coil L; and a fourth control switch K4 and a current limiting resistor R which are connected in parallel are connected in series with the first control switch K1 and are used for jointly controlling the discharge of the capacitor C to the driving coil L.
Preferably, the control circuit includes: a capacitor C for discharging the driving coil L; the fourth control switch K4 and the current limiting resistor R which are connected in series are connected in parallel with the capacitor C and are used for discharging the capacitor C; and a first control switch K1 connected in series with the driving coil L for controlling the discharge of the capacitor C after the discharge to the driving coil L.
Preferably, the drive mechanism comprises at least one of: the repulsion mechanism, the electromagnetic mechanism and the elastic mechanism.
Preferably, the holding mode of the opening and closing state of the driving mechanism includes at least one of the following: magnetic retention, elastic element retention, and mechanism latch retention.
Preferably, the control circuit comprises at least one of: the device comprises a silicon controlled rectifier, an insulated gate bipolar transistor IGBT, a relay and an electromagnetic switch.
In the invention, the control circuit 3 in the switch controls the current flowing through the driving coil of the driving mechanism 2 and the change rate thereof according to different operation conditions of the circuit, so that the switch assembly 1 executes the opening and closing actions (opening and closing actions) of the circuit at the most proper speed, namely, the combination of the rapid opening and closing actions and the constant-speed opening and closing actions is realized. As the number of rapid opening and closing actions is reduced, the probability of fatigue damage is reduced, and the service life and the safety of the switch are ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic diagram of a switch according to an embodiment of the invention;
FIG. 2 is a schematic diagram I of a control circuit according to an embodiment of the invention;
FIG. 3 is a schematic diagram II of a control circuit according to an embodiment of the invention;
FIG. 4 is a schematic diagram III of a control circuit according to an embodiment of the invention;
FIG. 5 is a schematic diagram IV of a control circuit according to an embodiment of the invention;
FIG. 6 is a schematic diagram five of a control circuit according to an embodiment of the invention; and
fig. 7 is a schematic diagram six of a control circuit according to an embodiment of the present invention.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
The embodiment of the invention provides a switch. Fig. 1 is a schematic diagram of a switch according to an embodiment of the invention, as shown in fig. 1, including: the switch assembly 1 is used for executing the opening and closing actions of the circuit when the circuit works normally or fails; a driving mechanism 2 including one or more driving coils for driving the operation of the switch assembly 1; and a control circuit 3 for controlling the current flowing through the one or more driving coils and the rate of change thereof, wherein the current flowing through the one or more driving coils and the rate of change thereof are smaller when the circuit is operating normally than when the circuit is malfunctioning.
In the related art, the electromagnetic repulsion mechanism of the high-speed switch has high breaking and closing movement strength, so that fatigue damage is caused when the high-speed switch is used for a long time, and the service life and the safety of the high-speed switch are reduced. In the embodiment of the invention, the control circuit 3 controls the current flowing through the driving coil of the driving mechanism 2 and the change rate thereof according to different operation conditions of the circuit, so that the switch assembly 1 executes the opening and closing actions (opening and closing actions) of the circuit at the most proper speed, namely, the combination of the rapid opening and closing actions and the constant-speed opening and closing actions is realized. As the number of rapid opening and closing actions is reduced, the probability of fatigue damage is reduced, and the service life and safety of the switch are ensured.
In the present embodiment, the switch assembly 1 includes a vacuum interrupter (shown as a shadow), a stationary contact 11, and a moving contact 12. The moving contact 12 is connected with the driving mechanism 2, and is used for realizing disconnection or contact with the fixed contact 11 under the driving of the driving mechanism 2, so as to realize the opening and closing actions of a circuit.
In this embodiment, the driving mechanism 2 may be one or more of a repulsive force mechanism, an electromagnetic mechanism, and an elastic mechanism.
In this embodiment, the holding manner of the opening/closing state may be one or more of magnetic holding, elastic element holding, and mechanism locking holding.
In this embodiment, the control switch 3 may be one or more of a silicon controlled rectifier, an IGBT, a relay, and an electromagnetic switch.
According to an embodiment of the invention, the control circuit comprises one or more capacitors for discharging a drive coil of the drive mechanism 2 to generate a current through the drive coil. Meanwhile, the control circuit further comprises one or more control switches connected in series with the one or more capacitors and the driving coil and used for controlling the discharge of the one or more capacitors to the driving coil.
In this embodiment, the current flowing through the drive coil of the drive mechanism 2 and its rate of change are controlled by one or more control switches and capacitors. For example, when the circuit fails and a rapid opening and closing action is required, the capacitor is directly discharged to the driving coil of the driving mechanism 2, and a current as large as possible is input to the driving coil or a current change rate as large as possible is provided to the driving coil, so that the switching assembly 1 is driven to perform the rapid opening and closing action of the circuit. For another example, when the circuit is operating normally so that the constant-speed opening and closing action can be adopted, the capacitor can be discharged to the driving coil of the driving mechanism 2 in a proper manner, and a small current or a small current change rate is input to the driving coil, wherein the current is smaller than the current required by the quick opening and closing action and the change rate thereof, so that the switch assembly 1 is driven to execute the constant-speed opening and closing action of the circuit. Among them, the above-mentioned suitable means may include, but are not limited to: (1) discharging the capacitor to the three-phase coil in series; (2) connecting a current limiting resistor in series to the drive coil; (3) the capacitor is reduced in voltage before discharging.
The implementation of the above embodiment of the present invention will be described in detail with reference to the accompanying drawings. In order to clearly distinguish between the rapid opening and closing operation and the constant-speed opening and closing operation, reference numerals are defined as follows.
(1) The capacitances for the rapid opening and closing actions are labeled C, C, C2 and C3.
(2) The capacitor used for the constant-speed opening and closing action is marked as C4;
(3) Coils for rapid opening and closing actions are marked as L, L, L2 and L3;
(4) The coil used for the constant-speed opening and closing action is marked as L4;
(5) The switches used for rapid opening and closing actions are marked as K1, K2 and K3;
(6) Marking a switch for constant-speed opening and closing action as K4; and
(7) And the current limiting resistor for the constant-speed opening and closing action is marked as R.
Example 1
Example 1 involves discharging a capacitor pair in series with three-phase coils. Specifically, the capacitor for the rapid opening and closing operation is directly connected to the three-phase coil, and the capacitor for the constant-speed opening and closing operation is respectively connected to the three-phase coil.
Fig. 2 is a schematic diagram of a control circuit according to an embodiment of the invention. As shown in fig. 2, the first capacitor C1, the second capacitor C2 and the third capacitor C3 are used to discharge the first coil L1, the second coil L2 and the third coil L3, respectively, wherein the first coil L1, the second coil L2 and the third coil L3 are connected in series and form a driving coil. Preferably, the first, second and third coils L1, L2 and L3 may also be connected in series and included in the driving coil. Furthermore, a first control switch K1 is connected in series with the first capacitor C1 and the first coil L1, and is configured to control the first capacitor C1 to discharge the first coil L1; the second control switch K2 is connected in series with the second capacitor C2 and the second coil L2, and is used for controlling the second capacitor C2 to discharge the second coil L2; and a third control switch K3 connected in series with the third capacitor C3 and the third coil L3 for controlling the third capacitor C3 to discharge the third coil L3. In addition, the control circuit further includes: a fourth capacitor C4 for discharging the driving coil, and a fourth control switch K4 connected in series with the fourth capacitor C4 and the fourth coil L4 for controlling the fourth capacitor C4 to discharge the fourth coil L4.
The working principle of this example 1 is: when the rapid switching-on and switching-off actions are executed, the first control switch K1, the second control switch K2 and the third control switch K3 are closed, and the first capacitor C1, the second capacitor C2 and the third capacitor C3 are respectively discharged to the first coil L1, the second coil L2 and the third coil L3 in the three-phase driving coil, so that the rapid switching-on and switching-off actions are realized; when the constant-speed opening and closing action is executed, the fourth control switch K4 is closed, and the fourth capacitor C4 discharges to the three-phase driving coil, so that the constant-speed opening and closing action is realized.
Example 2
Example 2 relates to using different capacitances for the fast and constant opening and closing actions.
Fig. 3 is a schematic diagram of a control circuit according to an embodiment of the invention. As shown in fig. 3, the control circuit includes: a first control switch K1 and a first capacitor C1 connected in series, in the first control branch, for discharging the driving coil L; and a second control switch K4 and a fourth capacitor C4 connected in series, in the second control branch connected in parallel with the first control branch, for discharging the driving coil L, wherein the capacitance value of the fourth capacitor C4 is smaller than the capacitance value of the first capacitor C1.
The working principle of this example 2 is: when the rapid switching-on and switching-off action is executed, the first control switch K1 is closed, and the first capacitor C1 with a larger capacitance value discharges the driving coil L to realize the rapid switching-on and switching-off action; when the constant-speed opening and closing action is executed, the fourth control switch K4 is closed, and the fourth capacitor C4 with smaller capacitance value discharges the driving coil L, so that the constant-speed opening and closing action is realized.
Example 3
Example 3 relates to using different drive coils for the fast and constant speed opening and closing actions.
Fig. 4 is a schematic diagram III of a control circuit according to an embodiment of the invention. As shown in fig. 4, the control circuit includes: the first control switch K1 and the first driving coil L1 which are connected in series in the first control branch, the fourth control switch K4 and the fourth driving coil L4 which are connected in series in the second control branch which is connected in parallel with the first control branch, and a capacitor C which is used for discharging the first driving coil L1 or the fourth driving coil L4, wherein the inductance value of the fourth driving coil L4 is larger than that of the first driving coil L1.
The working principle of this example 3 is: when the rapid switching-on and switching-off action is executed, the first control switch K1 is closed, the capacitor C discharges to the first driving coil L1 with a smaller inductance value, and the rapid switching-on and switching-off action is realized; when the constant-speed opening and closing action is executed, the capacitor C discharges to the first driving coil L4 with a larger inductance value, so that the constant-speed opening and closing action is realized.
Examples 4 to 6 below all relate to current limiting resistors for reducing the current flowing through the drive coil and its rate of change.
Example 4
Example 4 involves connecting a current limiting resistor in series to the drive coil.
Fig. 5 is a schematic diagram of a control circuit according to an embodiment of the invention. As shown in fig. 5, the control circuit includes: a capacitor C for discharging the driving coil L; a first control switch K1 in the first control branch for controlling the discharge of the capacitor C to the driving coil L; and a fourth control switch K4 and a current limiting resistor R connected in series, in a second control branch connected in parallel with the first control branch, for controlling the discharge of the capacitor C to the driving coil L as well.
The working principle of this example 4 is: when the quick opening and closing action is executed, the first control switch K1 is closed, and the capacitor C discharges to the driving coil L, so that the quick opening and closing action is realized; when the constant-speed opening and closing action is executed, the fourth control switch K4 is closed, the first control switch K1 is kept open, and the capacitor C discharges to the driving coil L through the current-limiting resistor R, so that the constant-speed opening and closing action is realized.
Example 5
Example 5 involves shorting a current limiting resistor connected in series to the drive coil.
Fig. 6 is a schematic diagram five of a control circuit according to an embodiment of the invention. As shown in fig. 6, the control circuit includes: a capacitor C for discharging the driving coil L; a first control switch K1 connected in series with the capacitor C and the driving coil L; and a fourth control switch K4 and a current limiting resistor R connected in parallel are connected in series with the first control switch K1 and are used for jointly controlling the discharge of the capacitor C to the driving coil L.
The working principle of example 5 is: when the rapid switching-on and switching-off action is executed, the first control switch K1 and the fourth control switch K4 are closed, and the capacitor C discharges the driving coil L to realize the rapid switching-on and switching-off action; when the constant-speed opening and closing action is executed, the first control switch K1 is closed, the fourth control switch K4 is opened, and the capacitor C discharges the driving coil L through the current-limiting resistor R, so that the constant-speed opening and closing action is realized.
Example 6
Example 6 involves dropping capacitor C before discharging.
Fig. 7 is a schematic diagram six of a control circuit according to an embodiment of the present invention. As shown in fig. 7, the control circuit includes: a capacitor C for discharging the driving coil L; the fourth control switch K4 and the current limiting resistor R which are connected in series are connected in parallel with the capacitor C and are used for discharging the capacitor C; and a first control switch K1 connected in series with the driving coil L for controlling the discharge of the capacitor C to the driving coil L after the discharge.
The working principle of example 6 is: when the quick opening and closing action is executed, the first control switch K1 is closed, and the capacitor C discharges the driving coil L to realize the quick opening and closing action; when the constant-speed opening and closing action is executed, the fourth control switch K4 is closed, the capacitor C discharges through the current-limiting resistor R, when the voltage is reduced to the constant-speed opening and closing action voltage, the fourth control switch K4 is opened, the first control switch K1 is closed, and the capacitor C discharges to the driving coil L after the voltage is reduced, so that the constant-speed opening and closing action is realized.
Those skilled in the art will appreciate that examples 2 to 6 are applicable to single-phase or three-phase switches except example 1 which is applicable to three-phase switches only.
In summary, according to the above embodiments of the present invention, a switch is provided. The switch includes: the switch assembly is used for executing the opening and closing actions of the circuit when the circuit works normally or fails; a drive mechanism comprising one or more drive coils for driving the action of the switch assembly; and a control circuit for controlling the current through the one or more drive coils and the rate of change thereof, wherein the current through the one or more drive coils and the rate of change thereof when the circuit is operating normally are less than the current through the one or more drive coils and the rate of change thereof when the circuit is malfunctioning. According to different operation conditions of the circuit, the control circuit 3 in the switch controls the current flowing through the driving coil of the driving mechanism 2 and the change rate of the current, so that the switch assembly 1 executes the opening and closing actions (opening and closing actions) of the circuit at the most proper speed, namely, the combination of the rapid opening and closing actions and the constant-speed opening and closing actions is realized. As the number of rapid opening and closing actions is reduced, the probability of fatigue damage is reduced, and the service life and safety of the switch are ensured.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A switch, comprising:
the switch assembly is used for executing the opening and closing actions of the circuit when the circuit works normally or fails;
a driving mechanism including a driving coil for driving the action of the switch assembly; and
a control circuit for controlling a current flowing through the driving coil and a rate of change thereof; the current and the rate of change thereof are less when the circuit is operating normally than when the circuit is malfunctioning, the circuit being usable for single phase switching;
the switch assembly includes: the vacuum arc extinguishing chamber, the fixed contact and the moving contact are connected with the driving mechanism and used for being disconnected or contacted with the fixed contact under the driving of the driving mechanism, so that the opening and closing actions of the circuit are realized;
the control circuit includes:
-a capacitor (C) for discharging the drive coil (L) to generate the current;
a fourth control switch (K4) and a current limiting resistor (R) connected in series and connected in parallel with the capacitor (C) for discharging the capacitor (C); and
a first control switch (K1) connected in series with the driving coil (L) for controlling the discharge of the capacitor (C) to the driving coil (L) after the discharge;
when the quick opening and closing action is executed, the first control switch (K1) is closed, and the capacitor (C) discharges the driving coil (L) to realize the quick opening and closing action; when the constant-speed opening and closing action is executed, the fourth control switch (K4) is closed, the capacitor (C) discharges through the current-limiting resistor (R), when the voltage is reduced to the constant-speed opening and closing action voltage, the fourth control switch (K4) is opened, the first control switch (K1) is closed, and the capacitor (C) discharges to the driving coil (L) after the voltage is reduced, so that the constant-speed opening and closing action is realized.
2. The switch of claim 1, wherein the drive mechanism comprises at least one of: the repulsion mechanism, the electromagnetic mechanism and the elastic mechanism.
3. The switch of claim 2, wherein the manner of maintaining the on-off state of the drive mechanism comprises at least one of: magnetic retention, elastic element retention, and mechanism latch retention.
4. A switch according to any one of claims 1 to 3, wherein the control circuit comprises at least one of: the device comprises a silicon controlled rectifier, an insulated gate bipolar transistor IGBT, a relay and an electromagnetic switch.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010664438 | 2020-07-10 | ||
| CN2020106644385 | 2020-07-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111739746A CN111739746A (en) | 2020-10-02 |
| CN111739746B true CN111739746B (en) | 2024-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010706740.2A Active CN111739746B (en) | 2020-07-10 | 2020-07-21 | Switch |
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| Country | Link |
|---|---|
| CN (1) | CN111739746B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101399124A (en) * | 2007-09-24 | 2009-04-01 | 王光顺 | Control circuit for bistable state permanent magnet operating mechanism |
| CN103165342A (en) * | 2013-04-09 | 2013-06-19 | 滁州学院 | Intelligent controller for split phase type quick permanent magnet vacuum circuit breaker |
| CN103560040A (en) * | 2013-11-08 | 2014-02-05 | 宁夏天地经纬电力设备工程有限公司 | Permanent magnetic operating mechanism of intelligent circuit breaker |
| JP2016225101A (en) * | 2015-05-29 | 2016-12-28 | 三菱電機株式会社 | Drive circuit for electromagnetic operation mechanism |
| CN108538685A (en) * | 2017-03-03 | 2018-09-14 | 株式会社日立产机系统 | Electromagnetic operator and Electromagnetically-operating formula opening and closing device |
-
2020
- 2020-07-21 CN CN202010706740.2A patent/CN111739746B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101399124A (en) * | 2007-09-24 | 2009-04-01 | 王光顺 | Control circuit for bistable state permanent magnet operating mechanism |
| CN103165342A (en) * | 2013-04-09 | 2013-06-19 | 滁州学院 | Intelligent controller for split phase type quick permanent magnet vacuum circuit breaker |
| CN103560040A (en) * | 2013-11-08 | 2014-02-05 | 宁夏天地经纬电力设备工程有限公司 | Permanent magnetic operating mechanism of intelligent circuit breaker |
| JP2016225101A (en) * | 2015-05-29 | 2016-12-28 | 三菱電機株式会社 | Drive circuit for electromagnetic operation mechanism |
| CN108538685A (en) * | 2017-03-03 | 2018-09-14 | 株式会社日立产机系统 | Electromagnetic operator and Electromagnetically-operating formula opening and closing device |
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| Publication number | Publication date |
|---|---|
| CN111739746A (en) | 2020-10-02 |
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