CN214255832U - Permanent magnet switch protection system - Google Patents
Permanent magnet switch protection system Download PDFInfo
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- CN214255832U CN214255832U CN202120324789.1U CN202120324789U CN214255832U CN 214255832 U CN214255832 U CN 214255832U CN 202120324789 U CN202120324789 U CN 202120324789U CN 214255832 U CN214255832 U CN 214255832U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The application discloses permanent magnetism switch protection system includes: the energy storage capacitor is connected with an external alternating current power supply and receives the voltage output by the external alternating current power supply to carry out floating charging; the closing loop is connected with the energy storage capacitor in parallel, receives the forward discharge voltage output by the energy storage capacitor and executes closing action; the brake separating loop is connected with the energy storage capacitor in parallel, receives the reverse discharge voltage output by the energy storage capacitor and executes brake separating action; the state monitoring equipment is respectively connected with the switching-off loop and the switching-on loop in parallel, receives a state feedback signal output by the switching-on loop when switching-on action is executed and a state feedback signal output by the switching-off loop when switching-off action is executed, and outputs a level pulse signal; and the standby power supply loop is connected with the state monitoring equipment in parallel, receives the level pulse signal output by the state monitoring equipment, and outputs a forward discharge voltage to the closing loop or outputs a reverse discharge voltage to the opening loop. The protection switch can correctly and reliably act when the permanent magnet switch breaks down.
Description
Technical Field
The application relates to the technical field of permanent magnet switches, in particular to a permanent magnet switch protection system.
Background
The permanent magnet switch is a novel operating mechanism, mainly comprises a permanent magnet, a switching-on and switching-off coil, an energy storage capacitor and other components, and realizes the switching-on and switching-off maintenance of the vacuum circuit breaker by utilizing the permanent magnet. In practical application, the permanent magnet switch is frequently used for defects of breakdown of an energy storage capacitor of switching-on and switching-off, unstable power voltage of the energy storage capacitor, disconnection of a loop contact of the energy storage capacitor, failure of an energy storage capacitor controller and the like, so that switching-on and switching-off faults are caused. Particularly, in an important load power supply loop, the permanent magnet switch has misoperation and failure due to switching-on and switching-off faults, and can cause great negative effects on important auxiliary machines or power supply systems in the power supply loop.
How to effectively ensure the permanent magnet switch to realize correct action and realize safe and reliable operation of important auxiliary machines and power supply systems in a power supply loop is a technical problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
An object of the embodiments of the present application is to provide a protection system for a permanent magnet switch, so as to solve the problem that the failure of the permanent magnet switch causes incorrect operation.
In order to solve the above technical problem, the present specification is implemented as follows:
in a first aspect, a permanent magnet switch protection system is provided, comprising:
a permanent magnet switching device, the permanent magnet switching device comprising:
the energy storage capacitor is connected with an external alternating current power supply and receives the voltage output by the external alternating current power supply to carry out floating charging;
the closing loop is connected with the energy storage capacitor in parallel, receives the positive discharging voltage output by the energy storage capacitor and executes closing action;
the brake separating loop is connected with the energy storage capacitor in parallel, receives the reverse discharge voltage output by the energy storage capacitor and executes brake separating action; and
a switch protection device, the switch protection device comprising:
the state monitoring equipment is respectively connected with the switching-off loop and the switching-on loop in parallel, receives a state feedback signal output by the switching-on loop when switching-on action is executed and a state feedback signal output by the switching-off loop when switching-off action is executed, and outputs a level pulse signal;
and the standby power supply loop is connected with the state monitoring equipment in parallel, receives the level pulse signal output by the state monitoring equipment, and outputs a forward discharge voltage to the closing loop or outputs a reverse discharge voltage to the opening loop.
Optionally, the method further includes:
and the voltage stabilizing power supply is connected between the external alternating current power supply and the energy storage capacitor, stabilizes the voltage output by the external alternating current power supply and outputs the stabilized voltage for performing floating charging on the energy storage capacitor.
Optionally, the standby power supply loop includes a standby dc power supply and a first switch, the first switch is connected in series with the standby dc power supply,
the first contact of the first switch is connected with one end of the state monitoring device, the second contact of the first switch is connected with the first electrode end of the standby direct-current power supply, the second electrode end of the standby direct-current power supply is connected with the other end of the state monitoring device, and the first switch receives the level pulse signal output by the state monitoring device and closes the first contact and the second contact of the first switch.
Optionally, the standby dc power supply includes a storage battery or a charger.
Optionally, the condition monitoring device comprises a monitoring circuit and an initiator,
the monitoring circuit is respectively connected with the switching-off loop and the switching-on loop in parallel, receives a state feedback signal output by the switching-on loop when switching-on action is executed and a state feedback signal output by the switching-off loop when switching-off action is executed, and outputs a first level pulse signal;
the starter is connected with the monitoring circuit in parallel, receives the first level pulse signal and outputs a second level pulse signal to a first switch of the standby power supply loop;
the first switch receives the second level pulse signal and closes the first contact and the second contact.
Optionally, the number of the permanent magnet switch devices is multiple, the number of the switch protection devices is one, and the switch protection devices are respectively connected in parallel with the multiple permanent magnet switch devices.
Optionally, the switching-on loop includes a second switch and a switching-on coil, the second switch is connected in series with the switching-on coil,
the first contact of the second switch is respectively connected with one end of the standby power supply loop and one end of the energy storage capacitor, the second contact of the second switch is connected with one end of the closing coil, the other end of the closing coil is connected with the other end of the standby power supply loop and the other end of the energy storage capacitor, the second switch receives a closing signal sent by an external control system and closes the first contact and the second contact, and the closing coil receives a forward discharge voltage output by the standby power supply loop or the energy storage capacitor and executes a closing action.
Optionally, the switching-off loop includes a third switch and a switching-off coil, the third switch is connected in series with the switching-off coil,
the first contact of the third switch is respectively connected with one end of the standby power supply loop and one end of the energy storage capacitor, the second contact of the third switch is connected with one end of the opening coil, the other end of the opening coil is connected with the other end of the standby power supply loop and the other end of the energy storage capacitor, the third switch receives an opening signal sent by an external control system and closes the first contact and the second contact, and the opening coil receives a reverse discharge voltage output by the standby power supply loop or the energy storage capacitor and executes opening action.
Optionally, the method further includes: a current limiting resistor and an isolating diode, wherein the current limiting resistor and the isolating diode are connected in series between the external alternating current power supply and the energy storage capacitor,
the current limiting resistor receives and limits current of alternating current output by the external alternating current power supply, and outputs the voltage after current limiting to the isolation diode;
and the isolation diode receives and isolates the current-limiting voltage and outputs the isolated voltage to the energy storage capacitor.
In a second aspect, a permanent magnet switch protection system is provided, comprising:
the voltage stabilizing power supply receives and stabilizes the alternating current power supply output by the external alternating current power supply;
the energy storage capacitor is connected with the stabilized voltage power supply in parallel and receives the stabilized voltage output by the stabilized voltage power supply to carry out floating charging;
the closing loop is connected with the energy storage capacitor in parallel, receives the positive discharging voltage output by the energy storage capacitor and executes closing action;
the brake separating loop is connected with the energy storage capacitor in parallel, receives the reverse discharge voltage output by the energy storage capacitor and executes brake separating action;
the monitoring circuit is respectively connected with the switching-off loop and the switching-on loop in parallel, receives a state feedback signal output by the switching-on loop when switching-on action is executed and a state feedback signal output by the switching-off loop when switching-off action is executed, and outputs a first level pulse signal;
the starter is connected with the monitoring circuit in parallel, receives the first level pulse signal and outputs a second level pulse signal;
and the standby power supply loop is connected with the starter in parallel, receives the second level pulse signal output by the starter, and outputs a forward discharge voltage to the closing loop or outputs a reverse discharge voltage to the opening loop.
In the embodiment of the application, the switch protection device comprising the state monitoring equipment and the standby power supply loop is adopted, so that the switch protection device can be started only when the opening and closing actions of the permanent magnet switch are abnormal without interfering with the original loop action mode that the energy storage capacitor provides the opening and closing voltage. The reliable action of switching on and off of the permanent magnet switch can be realized when the energy storage voltage fault occurs in the permanent magnet switch, and the original energy storage capacitor loop of the permanent magnet switch can be maintained without power outage.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a circuit diagram of a permanent magnet switch protection system according to a first embodiment of the present application.
Fig. 2 is a circuit diagram of a permanent magnet switch protection system according to a second embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The reference numbers in the present application are only used for distinguishing the steps in the scheme and are not used for limiting the execution sequence of the steps, and the specific execution sequence is described in the specification.
In order to solve the problems in the prior art, an embodiment of the present application provides a permanent magnet switch protection system, and fig. 1 shows a structural circuit diagram of the permanent magnet switch protection system according to a first embodiment of the present application.
As shown in fig. 1, the permanent magnet switch protection system includes a permanent magnet switch device and a switch protection device 10, the permanent magnet switch device specifically includes an energy storage capacitor 22, a closing loop 24 and an opening loop 26, and the switch protection device 10 includes a state monitoring device 12 and a standby power supply loop.
The energy storage capacitor 22 is connected to an external ac power source, and receives the voltage output from the external ac power source to perform float charging. The closing circuit 24 is connected in parallel with the energy storage capacitor 22, receives the forward discharge voltage output by the energy storage capacitor 22 and performs closing operation, and the opening circuit 26 is connected in parallel with the energy storage capacitor 22, receives the reverse discharge voltage output by the energy storage capacitor 22 and performs opening operation.
In one embodiment, as shown in fig. 1, the closing circuit 24 includes a second switch KM2 and a closing coil 242, and the second switch KM2 is connected in series with the closing coil 242. A first contact of the second switch KM2 is connected to one end of the standby power supply loop and one end of the energy storage capacitor 22, a second contact of the second switch KM2 is connected to one end of the closing coil 242, the other end of the closing coil 242 is connected to the other end of the standby power supply loop and the other end of the energy storage capacitor 22, the second switch KM2 receives a closing signal sent by an external control system (not shown) and closes the first contact and the second contact, and the closing coil 242 receives a forward discharge voltage output by the standby power supply loop or the energy storage capacitor 22 and performs a closing action.
In one embodiment, as shown in fig. 1, the opening loop 26 includes a third switch KM3 and an opening coil 262, and the third switch KM3 is connected in series with the opening coil 262. The first contact of the third switch KM3 is respectively connected with one end of the standby power supply loop and one end of the energy storage capacitor 22, the second contact of the third switch KM3 is connected with one end of the opening coil 262, the other end of the opening coil 262 is connected with the other end of the standby power supply loop and the other end of the energy storage capacitor 22, the third switch KM3 receives an opening signal sent by an external control system and closes the first contact and the second contact, and the opening coil 262 receives a reverse discharge voltage output by the standby power supply loop or the energy storage capacitor 22 and performs opening action.
That is, the closing circuit 24 is connected in parallel with the opening circuit 26, and both are connected in parallel with the backup power circuit and the energy storage capacitor 22, respectively, and the backup power circuit or the energy storage capacitor 22 provides a voltage for performing the closing operation or the opening operation. The energy storage capacitor 22 can provide the voltage for the closing circuit 24 and the opening circuit 26 to perform the closing action or the opening action, in case the energy storage capacitor 22 does not have any fault. Normally, the voltage required for the closing circuit 24 and the opening circuit 26 to perform the closing operation or the opening operation is 170V or more. If the energy storage capacitor 22 fails to provide the switching-off and switching-on voltages normally, or the energy storage capacitor 22 is attenuated to provide a voltage lower than 170V, the switching-on and switching-off operations of the switching-on and switching-off circuits 24 and 26 cannot be performed correctly. At this time, the standby power supply circuit needs to provide a voltage for switching on and off, which will be described later.
Now, a specific process of supplying the voltage for opening and closing when the energy storage capacitor 22 has no fault is described.
The ac power input received by the energy storage capacitor 22 is the system operating power, typically 220V ac. The ac power input is provided to the energy storage capacitor 22 to charge the energy storage capacitor, where the charging mode is floating charging, so that the energy storage capacitor 22 is always in a full charge state.
After receiving a closing signal sent by an external control system, the second switch KM2 of the closing circuit 24 connected in parallel with the energy storage capacitor 22 closes the first contact and the second contact, that is, the second switch KM2 is closed. Thus, the energy storage capacitor 22 outputs a forward discharge voltage to the closing circuit 24 instantaneously, so that a forward current is applied to the closing coil 242 of the closing circuit 24 through the second switch KM2, and a magnetic field generated by the current of the closing coil 242 and a magnetic field generated by the permanent magnet of the permanent magnet switch are superimposed in a forward direction. And a downward suction force is generated on the lower end surface of the movable armature of the permanent magnet switch at the working air gap, and the movable armature starts to move downwards to drive the permanent magnet switch to be switched on.
On the contrary, the third switch KM3 of the switching-out loop 26 connected in parallel with the energy storage capacitor 22 closes the first contact and the second contact, that is, the third switch KM3, after receiving the switching-out signal sent by the external control system. Thus, the energy storage capacitor 22 outputs a reverse discharge voltage to the opening circuit 26 instantaneously, so that a reverse current is introduced to the opening coil 262 of the opening circuit 26 through the third switch KM3, and a magnetic field generated by the current of the opening coil 262 is reversely superposed with a magnetic field generated by the permanent magnet of the permanent magnet switch. When the resultant magnetic field force of the movable armature at the working air gap is smaller than the resultant force of the contact spring and the opening spring, the movable armature starts to move upwards to drive the permanent magnet switch to open the switch. In the whole process of opening, the opening coil 262 only needs to provide a current for counteracting the magnetic field force of the permanent magnet, and the opening energy is mainly provided by an opening spring and a contact spring.
As described above, if the energy storage voltage fails and the voltages for opening and closing the opening and closing coils cannot be normally supplied, the standby power supply circuit needs to supply the voltages for opening and closing. However, before switching the mode in which the energy storage capacitor supplies voltage to the mode in which the backup power supply circuit supplies voltage, it is necessary to determine in advance that the energy storage capacitor has failed. Therefore, the present application introduces the state monitoring device 12 of the switching protection device 10, and the state monitoring device 12 monitors the state feedback condition when the opening circuit or the closing circuit performs the corresponding opening and closing operation.
Specifically, the state monitoring device 12 is connected in parallel to the opening circuit 26 and the closing circuit 24, receives a state feedback signal output by the closing circuit 24 when closing operation is performed and a state feedback signal output by the opening circuit 26 when opening operation is performed, and outputs a level pulse signal.
The standby power supply circuit is connected in parallel to the state monitoring device 12, receives the level pulse signal output from the state monitoring device 12, and outputs a forward discharge voltage to the closing circuit 24 or outputs a reverse discharge voltage to the opening circuit 26.
In one embodiment, as shown in fig. 2, the state monitoring device includes a monitoring circuit 122 and an initiator 124, the monitoring circuit 122 is connected in parallel with the opening circuit 262 and the closing circuit 242, respectively, receives a state feedback signal output by the closing circuit 242 performing the closing action and a state feedback signal output by the opening circuit 262 performing the opening action, and outputs a first level pulse signal.
In one embodiment, as shown in fig. 1, the backup power circuit includes a backup dc power source 14 and a first switch KM1, the first switch KM1 being connected in series with the backup dc power source 14. A first contact of the first switch KM1 is connected to one end of the state monitoring device 12, a second contact of the first switch KM1 is connected to a first electrode terminal (illustrated as a positive terminal) of the backup dc power supply 14, a second electrode terminal (illustrated as a negative terminal) of the backup dc power supply 14 is connected to the other end of the state monitoring device 12, and the first switch KM1 receives a level pulse signal output from the state monitoring device 12 and closes the first contact and the second contact of the first switch KM 1.
Optionally, the standby dc power supply includes a storage battery or a charger, and a voltage range of the standby dc power supply includes 170V to 220V.
Specifically, when the second switch KM2 of the closing circuit 242 receives a closing signal transmitted from the external control system, for example, the closing signal is represented as 1 by a high level pulse signal, and the second switch KM2 is closed, thereby performing a closing operation. The energy storage capacitor 22 normally inputs a forward current to the closing coil 242 of the switching circuit, but if the energy storage capacitor 22 fails at this time and the closing operation cannot be normally performed, the monitoring circuit 122 monitors the permanent magnet switch to output a low level pulse signal, which is, for example, 0. By comparing the closing signal sent by the external control system with the state feedback signal fed back by the closing loop, the monitoring circuit 122 determines that the energy storage capacitor 22 has a fault and cannot normally provide the closing voltage. At this time, the monitoring circuit 122 outputs a first level pulse signal, which triggers the starter 124 to start the standby power loop.
Due to the nature of permanent magnet switches, the closing action is typically around 20 milliseconds. Thus, the monitoring circuit 122 may initiate a delay timer in advance, for example, in the range of 15-30 milliseconds, if at the end of the delay timer the permanent magnet switch has not yet performed a closing action. That is, the closing signal and the state feedback signal do not coincide with each other, the monitoring circuit 122 outputs a trigger signal such as a high-level pulse to the starter 124.
The starter 124 is connected in parallel with the monitoring circuit 122, receives the first level pulse signal output by the monitoring circuit 122, and outputs the second level pulse signal to the first switch KM1 of the standby power loop, and the first switch KM1 receives the second level pulse signal and closes the first contact and the second contact thereof.
The starter 124, upon receiving the trigger signal of the first level pulse signal, transmits, for example, a high level pulse signal to start the closing of the first switch KM1 of the backup power supply loop. Thus, the switching is performed such that the standby dc power supply of the standby power supply circuit directly inputs the forward current to the closing coil 242 of the closing circuit. By starting the closing coil 242, the permanent magnet switch is ensured to correctly and reliably execute the closing action.
When the third switch KM3 of the switching-off loop 262 receives a switching-off signal sent by an external control system, for example, the switching-off signal is represented as 0 by a low-level pulse signal, the third switch KM3 is closed, and the switching-off action is performed. Normally, the energy storage capacitor 22 inputs a reverse current to the opening coil 262 of the opening circuit, but if the opening operation cannot be performed normally due to a fault of the energy storage capacitor 22, the monitoring circuit 122 monitors the permanent magnet switch to output a high level pulse signal, for example, indicated as 1. By comparing the opening signal sent by the external control system with the state feedback signal fed back by the opening loop, the monitoring circuit 122 determines that the energy storage capacitor 22 has a fault and cannot normally provide the closing voltage. At this time, the monitoring circuit 122 outputs a first level pulse signal, which triggers the starter 124 to start the standby power loop.
Similarly, considering the characteristics of the permanent magnet switch, the monitoring circuit 122 may start a delay timer in advance, if at the end of the delay timer, the permanent magnet switch has not performed the opening action. I.e., the opening signal and the state feedback signal do not coincide, the monitoring circuit 122 outputs a trigger signal such as a high level pulse to the starter 124.
The starter 124, after receiving the first level pulse signal output from the monitoring circuit 122, outputs a second level pulse signal to the first switch KM1 of the backup power supply loop to close the first contact and the second contact of the first switch KM 1. Thus, the switching is turned on by the backup power supply circuit, and the backup dc power supply directly inputs a reverse current to the opening coil 262 of the opening circuit. By starting the opening coil 262, the permanent magnet switch is ensured to execute opening action correctly and reliably.
In one embodiment, as shown in fig. 2, the permanent magnet switch protection system of the present application further comprises: and a regulated power supply 25 connected between an external ac power supply (not shown) and the energy storage capacitor 22, for regulating the voltage output from the external ac power supply and outputting a regulated voltage for float charging the energy storage capacitor.
As shown in fig. 2, the method further includes: a current limiting resistor 21 and an isolating diode 23, wherein the current limiting resistor 21 and the isolating diode 23 are connected in series between an external alternating current power supply and the energy storage capacitor 22. The current limiting resistor 21 receives and limits the current of the ac power output from the external ac power source, and outputs the limited voltage to the isolation diode. The isolation diode 23 receives the current-limited voltage and isolates the current-limited voltage, and outputs the isolated voltage to the energy storage capacitor 22.
The current-limiting resistor can prevent overvoltage and overcurrent from occurring to the voltage output by the voltage-stabilizing power supply 25, and the isolating diode can prevent inversion from occurring to the voltage output by the voltage-stabilizing power supply 25, so that the purpose of voltage stabilization is achieved.
In one embodiment, the number of the permanent magnet switching devices including the energy storage capacitor 22, the closing circuit 24 and the opening circuit 26 shown in fig. 1 or fig. 2 may be multiple, and the number of the switching protection device 10 is one, and the switching protection devices are respectively arranged in parallel with the multiple permanent magnet switching devices.
A plurality of permanent magnet switch cabinets of a power plant are arranged in parallel in a row to form a switch section, the permanent magnet switch cabinets are connected in parallel in a multi-path mode, and a switch protection device is installed beside each switch section in a unified mode. The state monitoring equipment of the switch protection device monitors the opening and closing action states of the permanent magnet switches in the switch cabinets, and when the energy storage capacitors are found to be in fault, corresponding standby power supply loops are switched to provide voltages required by opening and closing. Therefore, the switch protection device included in the permanent magnet switch protection system can realize multiple belts in one machine, namely, one switch protection device can monitor the switching-off and switching-on states of a plurality of permanent magnet switch devices and protect a standby power supply loop. Therefore, the protection cost of the permanent magnet switch protection system is saved, and the utilization rate of system protection is improved.
The permanent magnet switch protection system provided by the embodiment of the application can start the switch protection device only when the opening and closing actions of the permanent magnet switch are abnormal without interfering with the original loop action mode of providing the opening and closing voltage by the energy storage capacitor by adopting the switch protection device comprising the state monitoring equipment and the standby power supply loop. The permanent magnet switch has the advantages that the reliable action of switching on and switching off of the permanent magnet switch can be realized, the original energy storage capacitor circuit of the permanent magnet switch can be maintained without power outage, the permanent magnet switch does not need to be shut down immediately after the energy storage capacitor goes wrong, and the permanent magnet switch is switched to the standby power supply circuit in time to realize the normal switching on and switching off operation of the permanent magnet switch.
In addition, the standby power supply loop adopts a standby direct-current power supply, such as a storage battery or a charger, and has the advantages of small floor area and small investment.
Optionally, an embodiment of the present application further provides a permanent magnet switch protection system, and fig. 2 is a structural circuit diagram of the permanent magnet switch protection system according to a second embodiment of the present application.
As shown in fig. 2, the permanent magnet switch protection system includes:
a regulated power supply 25 for receiving and stabilizing an ac power output from an external ac power supply;
the energy storage capacitor 22 is connected with the stabilized voltage power supply in parallel and receives the stabilized voltage output by the stabilized voltage power supply to carry out floating charging;
a closing loop 24, connected in parallel with the energy storage capacitor, for receiving the forward discharge voltage output by the energy storage capacitor and executing a closing action;
a switching-off loop 26, connected in parallel with the energy storage capacitor, for receiving the reverse discharge voltage output by the energy storage capacitor and performing switching-off operation;
a monitoring circuit 122, connected in parallel to the switching-off loop and the switching-on loop, respectively, for receiving a state feedback signal output by the switching-on loop when performing a switching-on operation and a state feedback signal output by the switching-off loop when performing a switching-off operation, and outputting a first level pulse signal;
a starter 124 connected in parallel with the monitoring circuit, receiving the first level pulse signal, and outputting a second level pulse signal;
and the standby power supply loop is connected with the starter in parallel, receives the second level pulse signal output by the starter, and outputs a forward discharge voltage to the closing loop or outputs a reverse discharge voltage to the opening loop.
Each component of the permanent magnet switch protection system provided in the embodiment of the present application can implement each process implemented by the same component corresponding to the embodiment of fig. 1, and is not described herein again in order to avoid repetition.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A permanent magnet switch protection system, comprising:
a permanent magnet switching device, the permanent magnet switching device comprising:
the energy storage capacitor is connected with an external alternating current power supply and receives the voltage output by the external alternating current power supply to carry out floating charging;
the closing loop is connected with the energy storage capacitor in parallel, receives the positive discharging voltage output by the energy storage capacitor and executes closing action;
the brake separating loop is connected with the energy storage capacitor in parallel, receives the reverse discharge voltage output by the energy storage capacitor and executes brake separating action; and
a switch protection device, the switch protection device comprising:
the state monitoring equipment is respectively connected with the switching-off loop and the switching-on loop in parallel, receives a state feedback signal output by the switching-on loop when switching-on action is executed and a state feedback signal output by the switching-off loop when switching-off action is executed, and outputs a level pulse signal;
and the standby power supply loop is connected with the state monitoring equipment in parallel, receives the level pulse signal output by the state monitoring equipment, and outputs a forward discharge voltage to the closing loop or outputs a reverse discharge voltage to the opening loop.
2. The system of claim 1, further comprising:
and the voltage stabilizing power supply is connected between the external alternating current power supply and the energy storage capacitor, stabilizes the voltage output by the external alternating current power supply and outputs the stabilized voltage for performing floating charging on the energy storage capacitor.
3. The system of claim 1, wherein the backup power supply loop comprises a backup DC power supply and a first switch, the first switch being connected in series with the backup DC power supply,
the first contact of the first switch is connected with one end of the state monitoring device, the second contact of the first switch is connected with the first electrode end of the standby direct-current power supply, the second electrode end of the standby direct-current power supply is connected with the other end of the state monitoring device, and the first switch receives the level pulse signal output by the state monitoring device and closes the first contact and the second contact of the first switch.
4. The system of claim 3, wherein the backup dc power source comprises a battery or charger.
5. The system of claim 3, wherein the condition monitoring device comprises a monitoring circuit and an initiator,
the monitoring circuit is respectively connected with the switching-off loop and the switching-on loop in parallel, receives a state feedback signal output by the switching-on loop when switching-on action is executed and a state feedback signal output by the switching-off loop when switching-off action is executed, and outputs a first level pulse signal;
the starter is connected with the monitoring circuit in parallel, receives the first level pulse signal and outputs a second level pulse signal to a first switch of the standby power supply loop;
the first switch receives the second level pulse signal and closes the first contact and the second contact.
6. The system of claim 1, wherein the number of the permanent magnet switch devices is plural, the number of the switch protection devices is one, and the switch protection devices are respectively connected in parallel with the plural permanent magnet switch devices.
7. The system of claim 1, wherein the closing circuit comprises a second switch and a closing coil, the second switch in series with the closing coil,
the first contact of the second switch is respectively connected with one end of the standby power supply loop and one end of the energy storage capacitor, the second contact of the second switch is connected with one end of the closing coil, the other end of the closing coil is connected with the other end of the standby power supply loop and the other end of the energy storage capacitor, the second switch receives a closing signal sent by an external control system and closes the first contact and the second contact, and the closing coil receives a forward discharge voltage output by the standby power supply loop or the energy storage capacitor and executes a closing action.
8. The system of claim 1, wherein the opening loop includes a third switch and an opening coil, the third switch being connected in series with the opening coil,
the first contact of the third switch is respectively connected with one end of the standby power supply loop and one end of the energy storage capacitor, the second contact of the third switch is connected with one end of the opening coil, the other end of the opening coil is connected with the other end of the standby power supply loop and the other end of the energy storage capacitor, the third switch receives an opening signal sent by an external control system and closes the first contact and the second contact, and the opening coil receives a reverse discharge voltage output by the standby power supply loop or the energy storage capacitor and executes opening action.
9. The system of claim 1, further comprising: a current limiting resistor and an isolating diode, wherein the current limiting resistor and the isolating diode are connected in series between the external alternating current power supply and the energy storage capacitor,
the current limiting resistor receives and limits current of alternating current output by the external alternating current power supply, and outputs the voltage after current limiting to the isolation diode;
and the isolation diode receives and isolates the current-limiting voltage and outputs the isolated voltage to the energy storage capacitor.
10. A permanent magnet switch protection system, comprising:
the voltage stabilizing power supply receives and stabilizes the alternating current power supply output by the external alternating current power supply;
the energy storage capacitor is connected with the stabilized voltage power supply in parallel and receives the stabilized voltage output by the stabilized voltage power supply to carry out floating charging;
the closing loop is connected with the energy storage capacitor in parallel, receives the positive discharging voltage output by the energy storage capacitor and executes closing action;
the brake separating loop is connected with the energy storage capacitor in parallel, receives the reverse discharge voltage output by the energy storage capacitor and executes brake separating action;
the monitoring circuit is respectively connected with the switching-off loop and the switching-on loop in parallel, receives a state feedback signal output by the switching-on loop when switching-on action is executed and a state feedback signal output by the switching-off loop when switching-off action is executed, and outputs a first level pulse signal;
the starter is connected with the monitoring circuit in parallel, receives the first level pulse signal and outputs a second level pulse signal;
and the standby power supply loop is connected with the starter in parallel, receives the second level pulse signal output by the starter, and outputs a forward discharge voltage to the closing loop or outputs a reverse discharge voltage to the opening loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120324789.1U CN214255832U (en) | 2021-02-04 | 2021-02-04 | Permanent magnet switch protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120324789.1U CN214255832U (en) | 2021-02-04 | 2021-02-04 | Permanent magnet switch protection system |
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| Publication Number | Publication Date |
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| CN214255832U true CN214255832U (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120324789.1U Active CN214255832U (en) | 2021-02-04 | 2021-02-04 | Permanent magnet switch protection system |
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| CN (1) | CN214255832U (en) |
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