A magnetic blowout arc control device and circuit breaker

Abstract

The utility model discloses a kind of magnetic blowout arc control device and circuit breaker, the device includes being arranged in the main control module of circuit breaker, power supply module, magnetic blowing device and switch module;Switch module is connected with the one power supply terminal of circuit breaker's moving contact and external power respectively, moving contact is movably connected with static contact, static contact is connected with the another power supply terminal of external power, and switch module is used to control the on-off state between moving contact and external power;Power supply module is connected with main control module and external power respectively, for converting external power into direct current power supply and output to main control module, to power supply for main control module;Main control module is connected with switch module, magnetic blowing device and gate switch respectively, for controlling magnetic blowing device work according to the switch signal of gate switch, and delay control switch module's on-off state, to control the switch gate work of circuit breaker. The utility model can open arc extinguishing work before circuit breaker opening / closing gate, and arc extinguishing efficiency and effect are good.

Description

Technical Field

[0001] This utility model relates to the field of arc extinguishing technology, and in particular to a magnetic blowout arc extinguishing control device and circuit breaker. Background Technology

[0002] In power systems, circuit breakers are critical protective devices used to interrupt current in abnormal situations to protect circuits and equipment. Traditional circuit breakers often generate electric arcs when interrupting large alternating currents. These arcs not only cause wear and tear on the contact materials but can also lead to electromagnetic interference and overvoltage problems.

[0003] Current magnetic blowout circuit breakers incorporate a magnetic blowout device in series. When the circuit breaker trips, the fault current flows through the magnetic blowout coil in the device, generating a magnetic field positively correlated with the current intensity. This magnetic field exerts a Lorentz force (the force generated by the interaction of current and magnetic field) on the arc, forcing it to disperse outwards, thus achieving the magnetic blowout extinguishing function. However, current magnetic blowout devices only begin operation after the arc has been generated, meaning that by the time the magnetic blowout takes effect, the arc has already been running for some time, making it impossible to achieve rapid arc extinguishing and resulting in a poor extinguishing effect. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a magnetic blowout arc extinguishing control device and circuit breaker, which can start the arc extinguishing operation before the circuit breaker is opened / closed, with good arc extinguishing efficiency and effect.

[0005] To address the aforementioned technical problems, this utility model provides a magnetic blowout arc extinguishing control device, comprising a main control module, a power supply module, a magnetic blowout device, and a switch module disposed within a circuit breaker. The switch module is connected to the moving contact of the circuit breaker and one power terminal of an external power source. The moving contact is movably connected to a stationary contact, and the stationary contact is connected to the other power terminal of the external power source. The switch module controls the on / off state between the moving contact and the external power source. The power supply module is connected to the main control module and the external power source, converting the external power source into DC power and outputting it to the main control module to power it. The main control module is connected to the switch module, the magnetic blowout device, and a gate switch, controlling the operation of the magnetic blowout device according to the gate switch's switching signal and delaying the on / off state of the switch module, thereby controlling the circuit breaker's switching operation.

[0006] As an improvement to the above solution, the main control module includes a controller and a timer. The controller is connected to the power supply module, the switch module, the magnetic blow device, and the gate switch, respectively. The controller is also connected to the timer and is used to control the timer to start timing according to the switch signal of the gate switch and to receive the delay signal returned by the timer, thereby controlling the working state of the switch module according to the delay signal.

[0007] As an improvement to the above solution, the power supply module includes a rectifier module and a step-down module. The rectifier module is connected to the external power supply and the step-down module, and is used to rectify the external AC power supply into DC power supply and output it to the step-down module. The step-down module is connected to the main control module, and is used to step down the DC power supply into DC power supply and output it to the main control module to power the main control module.

[0008] As an improvement to the above solution, the control terminal of the switch module is connected to the main control module, and the two connection terminals of the switch module are respectively connected to one end of the moving contact and one power terminal of the external power supply, for controlling the on / off state between the moving contact and the external power supply according to the control signal output by the controller.

[0009] As an improvement to the above solution, the switching module is a MOSFET.

[0010] As an improvement to the above solution, the switching module is a relay.

[0011] As an improvement to the above solution, the controller includes an MCU module.

[0012] This utility model also provides a circuit breaker, including a circuit breaker body and the aforementioned magnetic blowout arc extinguishing control device, wherein the magnetic blowout arc extinguishing control device is disposed in the circuit breaker body.

[0013] Implementing this utility model has the following beneficial effects:

[0014] This invention can control the magnetic blower to perform magnetic blow operation in advance according to the switch signal of the circuit breaker gate switch, thereby improving the arc extinguishing effect and efficiency. After a predetermined delay time, it drives the switch module to control the on / off state between the moving contact and the external power supply, thereby controlling the switch operation of the circuit breaker. In turn, it automatically realizes the opening / closing and arc extinguishing functions of the circuit breaker through soft connection control, with excellent arc extinguishing efficiency and effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the magnetic blowout arc extinguishing control device of this utility model;

[0016] Figure 2 This is a schematic diagram of the main control module of this utility model;

[0017] Figure 3 This is a structural schematic diagram of the switch module of this utility model;

[0018] Figure 4 This is a structural schematic diagram of the power supply module of this utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] like Figure 1 As shown, this utility model provides a magnetic blowout arc extinguishing control device, including a main control module 1, a power supply module 2, a magnetic blowout device 3, and a switch module 4 installed in a circuit breaker. The switch module 4 is connected to the moving contact 5 of the circuit breaker and one power terminal of an external power supply 6. The moving contact 5 is movably connected to the stationary contact 7, and the stationary contact 7 is connected to the other power terminal of the external power supply 6. The switch module 4 is used to control the on / off state between the moving contact 5 and the external power supply 6, thereby controlling the contact or separation of the moving contact 5 and the stationary contact 7, and thus realizing the open / closed state of the circuit breaker. The external power supply 6 is an AC power supply.

[0023] The power supply module 2 is connected to the main control module 1 and the external power supply 6, respectively. It converts the external power supply 6 into DC power and outputs it to the main control module 1 to power the main control module 1 and ensure its stable operation. The main control module 1 is connected to the switch module 4, the magnetic blow-out device 3, and the gate switch 8, respectively. It controls the magnetic blow-out device 3 to perform magnetic blow-out operation according to the switch signal (such as a level change signal) input by the gate switch 8. After a predetermined delay time, it drives the switch module 4 to control the on / off state between the moving contact 5 and the external power supply 6, thereby controlling the contact or separation of the moving contact 5 and the stationary contact 7, and thus controlling the opening / closing operation of the circuit breaker. At this time, when the circuit breaker is opening / closing, the arc that may be generated will be quickly extinguished by the already working magnetic blow-out device 3, thereby improving the arc extinguishing efficiency and effect.

[0024] When the circuit breaker is in closed operation and the user operates the gate switch 8 to open the gate, a corresponding opening signal will be triggered to the main control module 1. For example, in a conventional push-button switch circuit, when the push-button switch is opened, a high / low level signal is triggered to the main control module 1. When the main control module 1 receives the opening signal, it first sends a trigger signal to control the magnetic blow-out device 3 to perform magnetic blow-out operation at the position of the moving contact 5 and the stationary contact 7. Then, after a predetermined delay, it sends a control signal to drive the switch module 4 to open, so that the moving contact 5 is disconnected from the external power supply 6. At this time, the moving contact 5 will separate from the stationary contact 7, the circuit will be broken, and an electric arc may be generated between the moving contact 5 and the stationary contact 7. The magnetic blow-out device 3, which is already in operation, will quickly extinguish the arc, improving the arc extinguishing efficiency and effect. Correspondingly, when the circuit breaker is in open operation and the user operates the gate switch 8 to close it, a corresponding closing signal will be triggered to the main control module 1. The main control module 1, based on the closing signal, first controls the magnetic blow-out device 3 to operate, and then, after a predetermined delay, sends a control signal to drive the switch module 4 to close, causing the moving contact 5 to close with the external power supply 6. At this time, the moving contact 5 will contact the stationary contact 7, and the circuit will be connected. An electric arc may be generated between the moving contact 5 and the stationary contact 7, and the magnetic blow-out device 3, which is already in operation, will quickly extinguish the arc, improving the arc extinguishing efficiency and effect. Therefore, this utility model can automatically realize the circuit breaker's opening / closing and arc extinguishing functions through a soft connection control method, with excellent arc extinguishing efficiency and effect, and the overall operation and structure are simple and the cost is low.

[0025] Specifically, such as Figures 1 to 2As shown, the main control module 1 includes a controller 11 and a timer 12. The controller 11 is connected to the power supply module 2, the switch module 4, the magnetic blow-out device 3, and the gate switch 8, respectively. The controller 11 is also connected to the timer 12. When the controller 11 receives the switch signal from the gate switch 8, it controls the magnetic blow-out device 3 to work and controls the timer 12 to start timing to obtain the required delay signal. When the delay time reaches the predetermined delay time, the controller 11 controls the on / off state of the switch module 4 according to the delay signal returned by the timer, so as to control the on / off state between the moving contact 5 and the external power supply 6, thereby controlling the on / off state of the circuit breaker and realizing the circuit breaker's opening / closing and arc extinguishing functions.

[0026] Secondly, when the circuit breaker performs the opening / closing arc extinguishing operation, that is, when the controller 11 controls the on / off state of the switch module 4, it also controls the timer 12 to perform arc extinguishing timing to obtain the arc extinguishing working time; when the arc extinguishing working time reaches the preset arc extinguishing time, it indicates that the generated arc has been completely processed, and at this time the magnetic blow-out device 3 is controlled to stop working.

[0027] Preferably, the controller 11 includes an MCU module.

[0028] Preferably, in other embodiments, the timer 12 may be a timer device built into the MCU module to further reduce device structure and cost.

[0029] Furthermore, such as Figure 1 and Figure 3 As shown, the control terminal of the switch module 4 is connected to the main control module 1. The two connection terminals of the switch module 4 are respectively connected to one end of the moving contact and one power terminal of the external power supply 6, used to control the on / off state between the moving contact 5 and the external power supply 6 according to the control signal output by the controller 11. For example, when the controller 11 receives the opening signal from the gate switch 8, the controller 11 sends a control signal to the control terminal of the switch module 4 after a delay, causing the switch module 4 to open, and the moving contact 5 to be disconnected from the external power supply 6, thus realizing the circuit breaker opening function. Correspondingly, when the controller 11 receives the closing signal from the gate switch 8, it can control the switch module 4 to conduct after a delay, causing the moving contact 5 to conduct from the external power supply 6, thus realizing the circuit breaker tripping function.

[0030] In this embodiment, the switch module 4 is preferably a relay 41. The controller 11 sends a control signal to control the relay 41 to operate, thereby connecting or disconnecting the moving contact 5 from the external power supply 6. In other embodiments, other switch modules 4 with circuit on / off control functions, such as MOSFETs, can be selected according to actual needs, without further restrictions.

[0031] Furthermore, such as Figure 1 and Figure 4 As shown, the power supply module 2 includes a rectifier module 21 and a step-down module 22. The rectifier module 21 is connected to the external power supply 6 and the step-down module 22, and is used to rectify the externally input AC power into DC power and output it to the step-down module 22. The step-down module 22 is connected to the main control module 1, and is used to step down the DC power into DC power and output it to the main control module 1 to power the main control module 1 and ensure that the main control module 1 is stably powered on and operates. The rectifier module 21 and the step-down module 22 used are existing technologies, and their specific structures and working principles will not be further described here.

[0032] This utility model also provides a circuit breaker, including a circuit breaker body and the aforementioned magnetic blowout arc extinguishing control device, wherein the magnetic blowout arc extinguishing control device is disposed in the circuit breaker body. Since the aforementioned magnetic blowout arc extinguishing control device has the aforementioned technical effects, the circuit breaker including the aforementioned magnetic blowout arc extinguishing control device should also have the aforementioned technical effects, and will not be elaborated further here.

[0033] In summary, this utility model can control the magnetic blow-out device to perform magnetic blow-out operation in advance according to the switch signal of the circuit breaker gate switch, thereby improving the arc extinguishing effect and efficiency. After a predetermined delay time, it drives the switch module to control the on / off state between the moving contact and the external power supply, thereby controlling the switch operation of the circuit breaker. In turn, it automatically realizes the circuit breaker's opening / closing and arc extinguishing functions through a soft connection control method, with excellent arc extinguishing efficiency and effect.

[0034] Finally, it should be noted that the above-described embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. These modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A magnetic blowout arc extinguishing control device, characterized in that, This includes the main control module, power supply module, magnetic blow device, and switch module installed in the circuit breaker; The switch module is connected to the moving contact of the circuit breaker and one power terminal of the external power supply, respectively. The moving contact is movably connected to the stationary contact, and the stationary contact is connected to the other power terminal of the external power supply. The switch module is used to control the on / off state between the moving contact and the external power supply. The power supply module is connected to the main control module and the external power supply respectively, and is used to convert the external power supply into DC power supply and output it to the main control module to power the main control module. The main control module is connected to the switch module, the magnetic blow device, and the gate switch respectively. It is used to control the operation of the magnetic blow device according to the switch signal of the gate switch, and to delay the on / off state of the switch module, thereby controlling the switching operation of the circuit breaker.

2. The magnetic blowout arc extinguishing control device according to claim 1, characterized in that, The main control module includes a controller and a timer, and the controller is connected to the power supply module, the switch module, the magnetic blow device and the gate switch respectively; The controller is also connected to the timer and is used to control the timer to operate according to the switch signal of the gate switch and to receive the delay signal returned by the timer, thereby controlling the working state of the switch module according to the delay signal.

3. The magnetic blowout arc extinguishing control device according to claim 1, characterized in that, The power supply module includes a rectifier module and a step-down module. The rectifier module is connected to the external power supply and the step-down module, and is used to rectify the external AC power supply into DC power supply and output it to the step-down module. The step-down module is connected to the main control module and is used to step down the DC power supply into a DC power supply and output it to the main control module to power the main control module.

4. The magnetic blowout arc extinguishing control device according to claim 2, characterized in that, The control terminal of the switch module is connected to the main control module. The two connection terminals of the switch module are respectively connected to one end of the moving contact and one power terminal of the external power supply, and are used to control the on / off state between the moving contact and the external power supply according to the control signal output by the controller.

5. The magnetic blowout arc extinguishing control device according to claim 4, characterized in that, The switching module is a MOSFET.

6. The magnetic blowout arc extinguishing control device according to claim 4, characterized in that, The switching module is a relay.

7. The magnetic blowout arc extinguishing control device according to claim 2, characterized in that, The controller includes an MCU module.

8. A circuit breaker, characterized in that, The circuit breaker includes a circuit breaker body and a magnetic blowout arc extinguishing control device as described in any one of claims 1 to 7, wherein the magnetic blowout arc extinguishing control device is disposed in the circuit breaker body.

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