CN220528019U - Solid-state circuit breaker - Google Patents
Solid-state circuit breaker Download PDFInfo
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- CN220528019U CN220528019U CN202321910559.9U CN202321910559U CN220528019U CN 220528019 U CN220528019 U CN 220528019U CN 202321910559 U CN202321910559 U CN 202321910559U CN 220528019 U CN220528019 U CN 220528019U
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
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Abstract
The application provides a solid-state circuit breaker relates to piezoelectricity ware technical field, includes: the device comprises a power module, an isolating switch, a switching-off operating mechanism, a current limiting module, a power switch, a tripping control circuit, a shaping circuit and a driving circuit; one end of the isolating switch is connected with the power module, the other end of the isolating switch is connected with the power switch through the current limiting module, and the current limiting module comprises: the first input end of the tripping control circuit is connected with the shaping circuit, the output end of the tripping control circuit is connected with the isolating switch through the opening operation mechanism, the input end of the shaping circuit is connected with the photoelectric switch, the first output end of the tripping control circuit is connected with the second output end of the tripping control circuit, the driving circuit is connected with the output end of the driving circuit, the photoelectric switch outputs a turn-off signal to the shaping circuit under the current change of the inductor, and the turn-off signal is respectively output to the tripping control circuit and the driving circuit through the shaping circuit so as to break the isolating switch and the power switch. The solid-state circuit breaker is turned off through the hardware protection of the inductor and the photoelectric switch.
Description
Technical Field
The present application relates to the field of piezoelectric devices, and in particular, to a solid state circuit breaker.
Background
At present, most solid-state circuit breakers are short-circuit-protected in a mode that current is sampled through a current sensor such as a current divider or a current transformer and a current sampling circuit, and then short-circuit current and protection parameters are calculated through a Micro Controller Unit (MCU), so that protection actions are triggered, and short-circuit current is cut off.
However, the protection mode is highly dependent on a microcontroller, and for the complex field application environment of a power system, if the microcontroller fails or crashes, a large current is generated in a loop, but the microcontroller cannot trigger the protection action, in addition, a mode of hardware rapid protection is adopted by a solid-state circuit breaker, however, a differential circuit and a comparator are generally adopted by the hardware protection circuit to collect and identify the current rising rate, and the hardware protection circuit is easily influenced by external interference noise to cause misoperation.
Disclosure of Invention
The present application aims to provide a solid-state circuit breaker for achieving the turn-off of the solid-state circuit breaker through the hardware protection of an inductor and a photoelectric switch, aiming at the defects in the prior art.
In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:
in a first aspect, embodiments of the present application provide a solid state circuit breaker, the solid state circuit breaker comprising: the device comprises a power module, an isolating switch, a switching-off operating mechanism, a current limiting module, a power switch, a tripping control circuit, a shaping circuit and a driving circuit; one end of the isolating switch is connected with the power supply module, the other end of the isolating switch is connected with the power switch through the current limiting module, and the control end of the isolating switch is connected with the opening operation mechanism; the current limiting module includes: an inductor, an electromagnetic mechanism and a photoelectric switch;
the first input end of the tripping control circuit is connected with the shaping circuit, and the output end of the tripping control circuit is connected with the opening operation mechanism and is used for controlling the opening operation of the isolating switch;
the input end of the shaping circuit is connected with the photoelectric switch, the first output end of the shaping circuit is connected with the first input end of the tripping control circuit, and the second output end of the shaping circuit is connected with the first input end of the driving circuit; the output end of the driving circuit is connected with the power switch, and the power switch is used for being connected with an external load;
the electromagnetic mechanism changes in position under the current change of the inductor, the photoelectric switch outputs a turn-off signal to the shaping circuit according to the position change of the electromagnetic mechanism, and the turn-off signal is respectively output to the tripping control circuit and the driving circuit through the shaping circuit so as to break the isolating switch and the power switch.
In an alternative embodiment, the inductor, the electromagnetic mechanism and the photoelectric switch are sequentially connected;
when the current in the inductor is larger than a preset threshold value, electromagnetic force is generated to enable the electromagnetic mechanism to displace, so that the photoelectric switch is controlled to output a turn-off signal to the shaping circuit.
In an alternative embodiment, two ends of the inductor are respectively connected with the isolating switch and the power switch, the electromagnetic mechanism is connected with the inductor, the input end of the photoelectric switch is connected with the electromagnetic mechanism, and the output end of the photoelectric switch is connected with the driving circuit.
In an alternative embodiment, the solid state circuit breaker further comprises: the first output end of the control circuit is connected with the second input end of the tripping control circuit;
the second output end of the control circuit is connected with the second input end of the driving circuit;
the input end of the control circuit is connected with the power supply module.
In an optional implementation manner, a current collection end of the control circuit is connected with a loop where the isolating switch and the current limiting module are located;
one end of the voltage acquisition end of the control circuit is connected with the input end of the isolating switch, and the other end of the voltage acquisition end of the control circuit is connected with the output end of the power switch.
In an alternative embodiment, the control circuit includes: the device comprises a current acquisition module, a voltage acquisition module and a control module; the input end of the current acquisition module is used as a current acquisition end of a control circuit to be connected with a loop where the isolating switch and the current limiting module are located, and the output end of the current acquisition module is connected with the control module;
the input end of the voltage acquisition module is used as the voltage acquisition end of the control circuit, the first input end of the voltage acquisition module is connected with the input end of the isolating switch, the second input end of the voltage acquisition module is connected with the output end of the power switch, and the output end of the voltage acquisition module is connected with the control module;
and the output end of the control module is respectively connected with the tripping control circuit and the driving circuit.
In an alternative embodiment, the control circuit further comprises: the signal acquisition end of the breaking circuit is respectively connected with two sides of the current limiting module, one end of the breaking circuit is connected with the current acquisition module, the first output end of the breaking circuit is connected with the control module, and the second output end of the breaking circuit is connected with the driving circuit.
In an alternative embodiment, the control circuit further comprises: the communication module is in communication connection with the control module and is also used for connecting terminal equipment.
In an alternative embodiment, the control circuit is connected with the trip control circuit and the driving circuit through an isolation device, and the shaping circuit is connected with the driving circuit through an isolation device.
In an alternative embodiment, the isolation device includes: an optocoupler device, a capacitive coupler device, and a magnetic coupler device.
The beneficial effects of this application are:
the embodiment of the application provides a solid-state circuit breaker, which comprises: the device comprises a power module, an isolating switch, a switching-off operating mechanism, a current limiting module, a power switch, a tripping control circuit, a shaping circuit and a driving circuit; wherein, isolator's one end is connected power module, and isolator's the other end passes through current limiting module and connects power switch, and isolator's control end is connected and is separated floodgate operating device, and current limiting module includes: the device comprises an inductor, an electromagnetic mechanism and a photoelectric switch, wherein a first input end of a tripping control circuit is connected with a shaping circuit, an output end of the tripping control circuit is connected with a switching-off operation mechanism and used for controlling switching-off operation of an isolating switch, an input end of the shaping circuit is connected with the photoelectric switch, a first output end of the shaping circuit is connected with a first input end of the tripping control circuit, and a second output end of the shaping circuit is connected with a first input end of a driving circuit; the output end of the driving circuit is connected with a power switch, and the power switch is used for being connected with an external load; the electromagnetic mechanism changes in position under the current change of the inductor, the photoelectric switch outputs a turn-off signal to the shaping circuit according to the position change of the electromagnetic mechanism, and the turn-off signal is respectively output to the tripping control circuit and the driving circuit through the shaping circuit so as to break the isolating switch and the power switch.
The solid-state circuit breaker that this application provided detects the electric current in the return circuit through inductance, electromagnetic mechanism and photoelectric switch in the current-limiting module for electromagnetic mechanism takes place the position variation under the electric current variation of inductance, photoelectric switch is according to electromagnetic mechanism's position variation, to shaping circuit output turn-off signal, thereby make shaping circuit to tripping control circuit and drive circuit output turn-off signal, with control isolator and power switch carry out the brake operation of separating from each other, through inductance, electromagnetic mechanism and photoelectric switch's hardware protection circuit, but direct output turn-off signal realizes solid-state circuit breaker's turn-off, has the security height, the rapid characteristics of protection action.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a solid-state circuit breaker according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a current limiting module according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of another solid-state circuit breaker according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of another solid-state circuit breaker according to an embodiment of the present application.
Description of main reference numerals: 110-a power module; 120-a current limiting module; 130-trip control circuitry; 140-shaping circuits; 150-a driving circuit; 160-a control circuit; 161-a current acquisition module; 162-a voltage acquisition module; 163-control module; 164-breaking the circuit; 165-a communication module; k1-isolating switch; a K2-power switch; k3-photoelectric switch; d1-a brake separating operation mechanism; d2-an electromagnetic mechanism; l-inductance.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of 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 apparent that the described embodiments are some embodiments of the present application, but not all embodiments.
Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be noted that, if the terms "upper", "lower", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or an azimuth or the positional relationship that is commonly put when the product of the application is used, it is merely for convenience of description and simplification of the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present application.
Furthermore, the terms first, second and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that, without conflict, features in embodiments of the present application may be combined with each other.
The solid state circuit breaker provided herein is specifically illustrated by a number of examples with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a solid-state circuit breaker according to an embodiment of the present application. As shown in fig. 1, the solid state circuit breaker includes: the power supply module 110, the isolating switch K1, the switching-off operating mechanism D1, the current limiting module 120, the power switch K2, the tripping control circuit 130, the shaping circuit 140 and the driving circuit 150; wherein, isolator K1 one end is connected power module 110, and isolator K1's the other end passes through current limiting module 120 and connects power switch K2, and isolator K1's control end is connected separating brake operating device D1, and current limiting module 120 includes: an inductance L, an electromagnetic mechanism D2 and a photoelectric switch K3.
In this embodiment, the power module 110 is configured to provide power to the trip control circuit 130, the shaping circuit 140 and the driving circuit 150, and the input power of the power module 110 is provided by the input bus of the solid-state circuit breaker, and since the power module 110 is connected to one end of the isolating switch K1, the power module 110 can provide power to the trip control circuit 130, the shaping circuit 140 and the driving circuit 150 without affecting the normal operation of the main circuit, even if the isolating switch K1 is in the open state.
The isolating switch K1 can be used for a maintainer to turn off the isolating switch K1 when the circuit is maintained or checked, so that the current in the main loop circuit is cut off, the maintainer can check conveniently, and meanwhile, when the solid-state circuit breaker is in a fault state, the isolating switch K1 can be turned off to disconnect a load connected with the power switch K2 from the main loop, so that the solid-state circuit breaker and the load are prevented from being damaged by faults.
The first input end of the trip control circuit 130 is connected to the shaping circuit 140, and the output end of the trip control circuit 130 is connected to the opening operation mechanism D1 for controlling the opening operation of the isolating switch K1.
The opening operation mechanism D1 may be a magnetic flux release, one end of the opening operation mechanism D1 is connected to the control end of the isolating switch K1, and the other end is connected to the trip control circuit 130, so that the opening operation mechanism D1 controls the isolating switch K1 to perform opening operation according to an opening control signal output by the trip control circuit 130, and the trip control circuit 130 mainly drives the opening operation mechanism D1 according to a shutdown signal output by the shaping circuit 140, so that the opening operation mechanism D1 controls the isolating switch K1 to open.
An input end of the shaping circuit 140 is connected with the photoelectric switch K3, a first output end of the shaping circuit 140 is connected with a first input end of the tripping control circuit 130, and a second output end of the shaping circuit 140 is connected with a first input end of the driving circuit 150; the output end of the driving circuit 150 is connected with a power switch K2, and the power switch K2 is used for being connected with an external load;
the electromagnetic mechanism D2 changes its position under the current change of the inductor L, and the photoelectric switch K3 outputs a turn-off signal to the shaping circuit 140 according to the position change of the electromagnetic mechanism D2, and the turn-off signal is output to the trip control circuit 130 and the driving circuit 150 through the shaping circuit 140, so as to break the isolating switch K1 and the power switch K2.
The power switch K2 is a core component of the solid-state circuit breaker, and may be a high-power field effect transistor (Metal Oxide Semiconductor, MOS), an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT), a thyristor, etc., where the power switch K2 is connected in series in a loop of the solid-state circuit breaker, and can bear a larger current and a higher turn-off voltage. The driving circuit 150 is used for latching and holding a control signal of the power switch K2 and driving and controlling the power switch K2, and realizes connection and disconnection with an external load by controlling the power switch K2. When the shaping circuit 140 outputs the off signal to lock and hold, and the fault is not relieved, the power switch K2 is always in the off state, and the driving circuit 150 drives the power switch K2 to mainly convert the off signal into a suitable voltage and current signal to drive the power switch K2 to be turned off.
Specifically, the current limiting module 120 includes: the current limiting module 120 is connected in series between the isolating switch K1 and the power switch K2, the current limiting characteristic of the inductor L in the current limiting module 120 can reduce the rising rate of loop current, the larger the inductance L is, the stronger the current inhibiting capability is, and damage of surge current to the power switch K2 and an external load of the power switch K2 can be reduced. The photoelectric switch K3 in the current limiting module 120 may be a photoelectric sensor, and is used for connecting the shaping circuit 140, when the circuit breaker fails, the current in the inductance L in the current limiting module 120 is normal, the position of the electromagnetic mechanism D2 is not changed, the photoelectric switch K3 outputs a stable preset level signal to the shaping circuit 140, and may be a low level signal or a high level signal, at this time, the shaping circuit 140 does not output a turn-off signal to the trip control circuit 130 and the driving circuit 150, but when the circuit breaker fails, the current in the inductance L in the current limiting module 120 increases sharply, and is greater than a preset threshold, the position of the electromagnetic mechanism D2 changes, the photoelectric switch K3 outputs a level signal opposite to the preset level signal to the shaping circuit 140 according to the position change of the electromagnetic mechanism D2, for example, if the preset level signal is a low level signal, the photoelectric switch K3 outputs a high level signal to the shaping circuit 140, so that the shaping circuit 140 filters burrs of the received level signal, and simultaneously outputs turn-off signals to the trip control circuit 130 and the driving circuit 150, so as to control the isolation switch K1 and the power switch K2 to perform a switching operation.
It should be noted that, since the isolating switch K1 is connected to the trip control circuit 130 through the opening operation mechanism D1, and the driving circuit 150 is connected between the power switches K2, the switching speed of the power switches K2 and the response speed of the magnetic flux trip have a difference, when the trip control circuit 130 and the driving circuit 150 simultaneously receive the turn-off signal output by the shaping circuit 140, firstly the power switch K2 will be turned off, and secondly the isolating switch K1 will be turned off, so that the influence of the breaking arc on the isolating switch K1 can be avoided.
In summary, the embodiment of the present application provides a solid-state circuit breaker, including: the device comprises a power module, an isolating switch, a switching-off operating mechanism, a current limiting module, a power switch, a tripping control circuit, a shaping circuit and a driving circuit; wherein, isolator's one end is connected power module, and isolator's the other end passes through current limiting module and connects power switch, and isolator's control end is connected and is separated floodgate operating device, and current limiting module includes: the device comprises an inductor, an electromagnetic mechanism and a photoelectric switch, wherein a first input end of a tripping control circuit is connected with a shaping circuit, an output end of the tripping control circuit is connected with a switching-off operation mechanism and used for controlling switching-off operation of an isolating switch, an input end of the shaping circuit is connected with the photoelectric switch, a first output end of the shaping circuit is connected with a first input end of the tripping control circuit, and a second output end of the shaping circuit is connected with a first input end of a driving circuit; the output end of the driving circuit is connected with a power switch, and the power switch is used for being connected with an external load; the electromagnetic mechanism changes in position under the current change of the inductor, the photoelectric switch outputs a turn-off signal to the shaping circuit according to the position change of the electromagnetic mechanism, and the turn-off signal is respectively output to the tripping control circuit and the driving circuit through the shaping circuit so as to break the isolating switch and the power switch.
The solid-state circuit breaker that this application provided detects the electric current in the return circuit through inductance, electromagnetic mechanism and photoelectric switch in the current-limiting module for electromagnetic mechanism takes place the position variation under the electric current variation of inductance, photoelectric switch is according to electromagnetic mechanism's position variation, to shaping circuit output turn-off signal, thereby make shaping circuit to tripping control circuit and drive circuit output turn-off signal, with control isolator and power switch carry out the brake operation of separating from each other, through inductance, electromagnetic mechanism and photoelectric switch's hardware protection circuit, but direct output turn-off signal realizes solid-state circuit breaker's turn-off, has the security height, the rapid characteristics of protection action.
With continued reference to fig. 1, the inductor L, the electromagnetic mechanism D2, and the photoelectric switch K3 are sequentially connected.
When the current in the inductor L is greater than a preset threshold, an electromagnetic force is generated to displace the electromagnetic mechanism D2, so as to control the photoelectric switch K3 to output a turn-off signal to the shaping circuit 140, where the electromagnetic mechanism D2 may include devices such as an iron core and a spring, and may perform a displacement action, and the photoelectric switch K3 may also be replaced by a hall proximity switch, an electromagnetic/capacitive proximity switch, a micro switch, and the like, which are not limited herein.
Specifically, when the breaker fails, the current in the inductance L in the current limiting module 120 is normal, the electromagnetic mechanism D2 connected with the inductance L does not generate a displacement action, so that the photoelectric switch K3 outputs a stable preset level signal to the shaping circuit 140, at this time, the shaping circuit 140 does not output a turn-off signal to the trip control circuit 130 and the driving circuit 150, but when the breaker fails, the current in the inductance L in the current limiting module 120 increases sharply, and is greater than a preset threshold, a strong electromagnetic force is generated, so that the electromagnetic mechanism D2 connected with the inductance L generates a displacement action, thereby providing a trigger signal to the photoelectric switch K3, so that the photoelectric switch K3 outputs a level signal opposite to the preset level signal to the shaping circuit 140, and the shaping circuit 140 filters burrs of the received level signal and simultaneously outputs turn-off signals to the trip control circuit 130 and the driving circuit 150, so as to control the isolating switch K1 and the power switch K2 to perform a switching-off operation.
Fig. 2 is a schematic structural diagram of a current limiting module according to an embodiment of the present application. As shown in fig. 2, two ends of the inductor L are respectively connected with the isolating switch K1 and the power switch K2, the electromagnetic mechanism D2 is connected with the inductor L, an input end of the photoelectric switch K3 is connected with the electromagnetic mechanism D2, and an output end of the photoelectric switch K3 is connected with the driving circuit 150.
The two ends of the inductor L are connected in series to the two ends of the isolating switch K1 and the power switch K2, the electromagnetic mechanism D2 is connected to the middle position of the inductor L, for inducing electromagnetic force generated by the inductor L, and the input end of the photoelectric switch K3 is connected with the electromagnetic mechanism D2, for receiving a trigger signal that the electromagnetic mechanism D2 generates displacement and outputs an off signal to the output shaping circuit 140.
Fig. 3 is a schematic structural diagram of another solid-state circuit breaker according to an embodiment of the present application. As shown in fig. 3, the solid-state circuit breaker further includes: the first output end of the control circuit 160 is connected to the second input end of the trip control circuit 130, the second output end of the second control circuit 160 is connected to the second input end of the driving circuit 150, and the input end of the second control circuit 160 is connected to the power module 110.
Optionally, the current collecting end of the control circuit 160 is connected to the circuit where the isolating switch K1 and the current limiting module 120 are located.
One end of the voltage acquisition end of the control circuit 160 is connected with the input end of the isolating switch K1, and the other end of the voltage acquisition end of the control circuit 160 is connected with the output end of the power switch K2.
Specifically, the control circuit 160 is the control core of the overall solid state circuit breaker. The control circuit 160 can collect current signals and voltage signals in the loop through the current collection terminal and the voltage collection terminal, judge the fault type through a preset current threshold value and a preset voltage threshold value, and protect the fault through protection modes corresponding to different fault types, wherein the protection modes can comprise: overload protection, short-circuit protection, overvoltage protection, undervoltage protection and other protection modes. When the solid-state circuit breaker fails, a turn-off signal can be sent to the driving circuit 150 according to a threshold value set by the circuit, so that the driving circuit 150 can rapidly cut off the power switch K2, and meanwhile, a turn-off signal is sent to the trip control circuit 130, so that the trip control circuit 130 controls the opening operation mechanism D1 to rapidly cut off the isolating switch K1, and fault protection is realized. When the solid-state circuit breaker breaks down, the control circuit 160 receives the signal of the circuit breaker to be powered on again, and resets the protection signal latched by the driving circuit 150 when the fault protection is generated, so as to control the power switch K2 to be turned on.
Optionally, the control circuit 160 is connected to the trip control circuit 130 and the driving circuit 150 through an isolation device, and the shaping circuit 140 is connected to the driving circuit 150 through an isolation device.
Optionally, the isolation device comprises: an optocoupler device, a capacitive coupler device, and a magnetic coupler device.
Specifically, the control circuit 160 is connected with the trip control circuit 130 and the driving circuit 150 through an isolation device, so that electrical isolation is realized, the shaping circuit 140 and the trip control circuit 130 are in one circuit, share a group of power sources and are not electrically isolated, the control circuit 160 and the driving circuit 150 respectively and independently use a group of power sources, the shaping circuit 140 is connected with the driving circuit 150 through the isolation device, and a burr signal generated by interference of the shaping circuit 140 is prevented from being output to the driving circuit 150, so that the power switch K2 is turned off erroneously.
When the solid-state circuit breaker fails and the control circuit 160 operates normally, the control circuit 160 outputs the off signal to the driving circuit 150 and the trip control circuit 130 through the shaping circuit 140 by detecting the current and voltage signals in the circuit. When the solid-state circuit breaker fails, but the control circuit 160 cannot work normally, the control circuit 160 cannot output the turn-off signal to the driving circuit 150 and the trip control circuit 130, at this time, the electromagnetic mechanism D2 in the current limiting module 120 corresponds to the photoelectric switch K3, and outputs the turn-off signal to the shaping circuit 140, so that the shaping circuit 140 outputs the turn-off signal to the driving circuit 150 and the trip control circuit 130, thereby completing the protection of the circuit breaker failure.
Fig. 4 is a schematic structural diagram of another solid-state circuit breaker according to an embodiment of the present application. As shown in fig. 4, the control circuit 160 includes: a current collection module 161, a voltage collection module 162, and a control module 163; the input end of the current collection module 161 is used as the current collection end of the control circuit 160 to connect the loop where the isolating switch K1 and the current limiting module 120 are located, and the output end of the current collection module 161 is connected to the control module 163.
The input end of the voltage acquisition module 162 serves as the voltage acquisition end of the control circuit 160, the first input end of the voltage acquisition module 162 is connected with the input end of the isolating switch K1, the second input end of the voltage acquisition module 162 is connected with the output end of the power switch K2, and the output end of the voltage acquisition module 162 is connected with the control module 163.
The output terminal of the control module 163 is connected to the trip control circuit 130 and the driving circuit 150, respectively.
Specifically, the control circuit 160 acquires a loop current signal, an input voltage signal and an output voltage signal in the main loop of the solid-state circuit breaker through the current acquisition module 161 and the voltage acquisition module 162, and transmits the acquired current signal and voltage signal to the control module 163, so that the control module 163 can judge the fault type according to the acquired current signal, voltage signal and preset current threshold and voltage threshold, and output control signals to the driving circuit 150 and the trip control circuit 130.
With continued reference to fig. 4, the control circuit 160 further includes: the breaking circuit 164, the inductance L collection end of the breaking circuit 164 is connected with two sides of the current limiting module 120 respectively, one end of the breaking circuit 164 is connected with the current collection module 161, the first output end of the breaking circuit 164 is connected with the control module 163, and the second output end of the breaking circuit 164 is connected with the driving circuit 150.
The voltage signals at two ends of the inductor L of the current limiting module 120 are connected to the breaking circuit 164 in the control circuit 160, the breaking circuit 164 judges whether the breaker fails according to the collected inductor L signal, the current signal collected by the current collecting module 161 and a preset voltage threshold value, and if the breaker fails, the breaking circuit sends a turn-off signal to the driving circuit 150.
It should be noted that, the voltage signals at two ends of the inductance L of the current limiting module 120 are connected to the breaking circuit 164 in the control circuit 160, so as to implement differentiation of the line current. The differential voltage signal amplitude is uin=l×di/dt, where L is the inductance of the inductance L, and the differential voltage signal indicates the rate of change of the loop current. When the differential voltage signal is greater than the preset threshold, the hardware fast protection of the electromagnetic mechanism D2 and the photoelectric switch K3 in the current limiting module 120 is triggered, and the power switch K2 is turned off by directly transmitting the turn-off signal to the driving circuit 150 through the shaping circuit 140, but not controlled by the control circuit 160, and the action time of the hardware fast protection is more rapid than that of the control circuit 160 detecting the current value and then controlling.
With continued reference to fig. 4, the control circuit 160 further includes: and a communication module 165, the communication module 165 being communicatively connected to the control module 163, the communication module 165 being further adapted to connect to a terminal device.
Specifically, the communication module 165 may send the collected current and voltage parameters, the device status, the fault code, etc. to other devices through an internal communication interface, so as to facilitate subsequent analysis and processing.
The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes or substitutions are covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A solid state circuit breaker, the solid state circuit breaker comprising: the device comprises a power module, an isolating switch, a switching-off operating mechanism, a current limiting module, a power switch, a tripping control circuit, a shaping circuit and a driving circuit; the utility model discloses a power supply module, isolator, power switch, current limiting module, isolating switch, power switch, separating switch's one end is connected power module, isolating switch's the other end is passed through current limiting module connects power switch, isolating switch's control end is connected separating brake operating device, current limiting module includes: an inductor, an electromagnetic mechanism and a photoelectric switch;
the first input end of the tripping control circuit is connected with the shaping circuit, and the output end of the tripping control circuit is connected with the opening operation mechanism and is used for controlling the opening operation of the isolating switch;
the input end of the shaping circuit is connected with the photoelectric switch, the first output end of the shaping circuit is connected with the first input end of the tripping control circuit, and the second output end of the shaping circuit is connected with the first input end of the driving circuit; the output end of the driving circuit is connected with the power switch, and the power switch is used for being connected with an external load;
the electromagnetic mechanism changes in position under the current change of the inductor, the photoelectric switch outputs a turn-off signal to the shaping circuit according to the position change of the electromagnetic mechanism, and the turn-off signal is respectively output to the tripping control circuit and the driving circuit through the shaping circuit so as to break the isolating switch and the power switch.
2. The circuit breaker of claim 1, wherein the inductor, the electromagnetic mechanism and the optoelectronic switch are connected in sequence;
when the current in the inductor is larger than a preset threshold value, electromagnetic force is generated to enable the electromagnetic mechanism to displace, so that the photoelectric switch is controlled to output a turn-off signal to the shaping circuit.
3. The circuit breaker according to claim 2, wherein the isolating switch and the power switch are connected to two ends of the inductor, the electromagnetic mechanism is connected to the inductor, the input end of the photoelectric switch is connected to the electromagnetic mechanism, and the output end of the photoelectric switch is connected to the shaping circuit.
4. The circuit breaker of claim 1, wherein the solid state circuit breaker further comprises: the first output end of the control circuit is connected with the second input end of the tripping control circuit;
the second output end of the control circuit is connected with the second input end of the driving circuit;
the input end of the control circuit is connected with the power supply module.
5. The circuit breaker of claim 4, wherein a current collection terminal of the control circuit connects the isolation switch to a circuit in which the current limiting module is located;
one end of the voltage acquisition end of the control circuit is connected with the input end of the isolating switch, and the other end of the voltage acquisition end of the control circuit is connected with the output end of the power switch.
6. The circuit breaker of claim 5, wherein the control circuit comprises: the device comprises a current acquisition module, a voltage acquisition module and a control module; the input end of the current acquisition module is used as a current acquisition end of a control circuit to be connected with a loop where the isolating switch and the current limiting module are located, and the output end of the current acquisition module is connected with the control module;
the input end of the voltage acquisition module is used as the voltage acquisition end of the control circuit, the first input end of the voltage acquisition module is connected with the input end of the isolating switch, the second input end of the voltage acquisition module is connected with the output end of the power switch, and the output end of the voltage acquisition module is connected with the control module;
and the output end of the control module is respectively connected with the tripping control circuit and the driving circuit.
7. The circuit breaker of claim 6, wherein the control circuit further comprises: the signal acquisition end of the breaking circuit is respectively connected with two sides of the current limiting module, one end of the breaking circuit is connected with the current acquisition module, the first output end of the breaking circuit is connected with the control module, and the second output end of the breaking circuit is connected with the driving circuit.
8. The circuit breaker of claim 6, wherein the control circuit further comprises: the communication module is in communication connection with the control module and is also used for connecting terminal equipment.
9. The circuit breaker of claim 4, wherein the control circuit is connected to the trip control circuit and the drive circuit through an isolation device, and wherein the shaping circuit is connected to the drive circuit through an isolation device.
10. The circuit breaker of claim 9, wherein the isolation device comprises: an optocoupler device, a capacitive coupler device, and a magnetic coupler device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321910559.9U CN220528019U (en) | 2023-07-19 | 2023-07-19 | Solid-state circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321910559.9U CN220528019U (en) | 2023-07-19 | 2023-07-19 | Solid-state circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220528019U true CN220528019U (en) | 2024-02-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321910559.9U Active CN220528019U (en) | 2023-07-19 | 2023-07-19 | Solid-state circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220528019U (en) |
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2023
- 2023-07-19 CN CN202321910559.9U patent/CN220528019U/en active Active
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