CN213185474U - Solid-state circuit breaker - Google Patents
Solid-state circuit breaker Download PDFInfo
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- CN213185474U CN213185474U CN202021362914.XU CN202021362914U CN213185474U CN 213185474 U CN213185474 U CN 213185474U CN 202021362914 U CN202021362914 U CN 202021362914U CN 213185474 U CN213185474 U CN 213185474U
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Abstract
The utility model provides a solid-state circuit breaker, includes main switch unit and the power device switch unit of establishing ties in the main loop, current acquisition module and the voltage acquisition module of being connected with the main loop respectively, the control module who is connected with main switch unit, power device switch unit, current acquisition module and voltage acquisition module respectively, and control module controls the main switch unit closure earlier when closing, then controls power device switch unit and switches on, and control module controls power device switch unit earlier and ends during the disconnection, then controls the disconnection of main switch unit, power device switch unit includes the power device switch, solid-state circuit breaker has the soft start function, and when the load starts, the control module drives the gradual increase of conduction angle of power device switch and realizes the soft start for the start-up of non-resistive load such as guarantee motor.
Description
Technical Field
The utility model relates to a switch field, concretely relates to solid state circuit breaker.
Background
The existing motor working system is composed of a circuit breaker, a soft starter, a contactor, a thermal relay and a motor. When circuit current is overloaded and short-circuited, the circuit breaker is subjected to tripping protection, the soft starter is controlled when the motor is started, the contactor controls the operation and stop of the motor, and the thermal relay is matched with the contactor to protect the circuit from three-phase imbalance, stalling, ground fault and the like.
Solid-state circuit breakers that employ power device switches as switching elements have been developed with the development of power electronics and are used in more and more applications. The existing solid-state circuit breaker has the functions of being incompatible with an alternating current circuit, lacking the functions of adjusting power in real time according to load current, realizing soft start and the like.
In addition, along with solid-state circuit breaker application occasion is more and more, compare and install in the block terminal in traditional circuit breaker mostly, solid-state circuit breaker's installation environment is comparatively diversified, but present solid-state circuit breaker's wiring mode still evolves from traditional circuit breaker form, and the nut naked eye of fixed business turn over line is visible, has the potential safety hazard.
In addition, the human-computer interface and the circuit breaker body of the existing solid-state circuit breaker are integrated, and if a user needs to operate the solid-state circuit breaker, a power distribution cabinet needs to be opened for operation, so that the mode for operating the solid-state circuit breaker is limited.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a solid-state circuit breaker simple structure, reliability are high.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a solid-state circuit breaker, includes main switch unit and the power device switch unit of establishing ties in the major loop, current acquisition module and the voltage acquisition module of being connected with the major loop respectively, the control module who is connected with main switch unit, power device switch unit, current acquisition module and voltage acquisition module respectively, control module controls the closure of main switch unit earlier when closing, then control power device switch unit switches on, and control module controls power device switch unit earlier and ends during the disconnection, then control the disconnection of main switch unit, power device switch unit includes the power device switch, solid-state circuit breaker has the soft start function, and when the load starts, the gradual increase of the angle of conduction of control module drive power device switch realizes soft start.
Preferably, the control module monitors current in real time through the current acquisition module in the load operation process, and if the current is larger than a preset power regulation current threshold, the control module drives the conduction angle of the power device switch to be reduced to realize power regulation.
Preferably, the solid-state circuit breaker comprises a human-computer interface module, the human-computer interface module is connected with the control module through the communication module, and whether the soft start function is started or not can be selected through the human-computer interface module.
Preferably, the power device switch unit includes two power device switches, the two power device switches are connected in series in the main loop, and voltage drop directions of the two power device switches are opposite.
Preferably, the two power device switches each include a parasitic diode, and the parasitic diodes of the two power device switches have opposite voltage drop directions in the main circuit.
Preferably, the control module comprises a main controller, the main controller is a microcontroller MCU or a single chip microcomputer, the main controller monitors current signals and voltage signals of the load through a current acquisition module and a voltage acquisition module, and when a fault occurs, the main controller control module firstly controls the power device switch unit to be cut off and then controls the main switch unit to be disconnected.
Preferably, the control module include main control unit and protection monitoring module, current acquisition module and voltage acquisition module are connected with protection monitoring module, protection monitoring module is connected with control module's main control unit, protection monitoring module monitor the electric current and the voltage signal of current acquisition module and voltage acquisition module transmission, protection monitoring module carries out data transmission with main control unit, main control unit carries out logic judgement to the data that protection monitoring module provided, drives the circuit breaker disconnection during the trouble.
Preferably, the solid-state circuit breaker further comprises a communication module, and the solid-state circuit breaker can communicate with an upper computer through the communication module; and a surge protection module is also arranged on a main loop of the solid-state circuit breaker.
Preferably, the main switching unit includes a relay or a contactor; the power device switch is a power semiconductor or an IGBT power tube or an MOSFET power tube or an NPN power tube or a thyristor or a controllable silicon or an IGCT or an IGET or a GTO.
Preferably, the main switch unit comprises a relay K1, three groups of contacts of the relay K1 are respectively connected in series on a U, V, W three-phase main loop, and a coil of the relay K1 is coupled with the control module; the power device switch unit comprises three groups of power device switches which are respectively connected to U, V, W three-phase main loops, each group of power device switches comprises two power device switches, the two power device switches are connected in series in the corresponding phase main loops, the voltage drop directions of the two power device switches are opposite, and the control end of each power device switch is connected with the control module.
Preferably, the main switch unit comprises relays K1 and K2, relays K1 and K2 are connected in series in the main loop, the power device switch unit comprises two power device switches Q1 and Q2, the power device switches Q1 and Q2 are connected in series in the main loop, voltage drop directions of the power device switches Q1 and Q2 are opposite, coils of the two relays K1 and K2 are coupled with the control module, and control terminals of the power device switches Q1 and Q2 are connected with the control module.
The utility model discloses a solid-state circuit breaker, main switch unit and power device switch unit are established ties on the major loop, and control module controls the main switch unit closure earlier when closing, then control power device switch unit switches on, and control module controls power device switch unit earlier and ends when breaking off, then controls the main switch unit disconnection, realizes physical isolation through the main switch unit, ensures the safety of power consumption, realizes no arc through the power device switch unit and breaks off; moreover, the solid-state circuit breaker has a soft start function, and the control module realizes soft start by controlling the conduction angle of the power device switch.
In addition, the solid-state circuit breaker carries out real-time current monitoring through the current acquisition module, when load current is too big, realizes power regulation through the conduction angle of drive regulation power device switch, and protection circuit and equipment can be as starting and protection system, replace contactor, thermal relay and soft starter to be connected with the motor, and the cost is reduced also ensures that the system is safe high-efficient more simultaneously. Furthermore, the human-computer interface module can selectively adopt soft start, when the load is a non-resistive load such as a motor, the soft start is adopted, and when the load is a resistive load, the soft start can be closed, so that the solid-state circuit breaker can be suitable for various use environments.
In addition, the power device switch unit of the solid-state circuit breaker comprises two power device switches with opposite voltage drop directions in the main loop, and the universal alternating current and direct current and the non-arcing circuit closing and opening can be realized.
In addition, the main controller and the protection monitoring module through the control module can realize multiple protections according to the collected current and voltage signals, and guarantee the safety of electric equipment and electricity utilization.
Drawings
Fig. 1 is a block diagram of a circuit configuration of a first embodiment of a solid-state circuit breaker of the present invention;
fig. 2 is a block diagram of a circuit configuration of a second embodiment of the solid-state circuit breaker of the present invention;
fig. 3 is a block diagram of a circuit configuration of a third embodiment of the solid-state circuit breaker of the present invention;
fig. 4 is a circuit schematic of an embodiment of a single-phase solid state circuit breaker of the present invention;
fig. 5 is a schematic circuit diagram of a three-phase solid state circuit breaker embodiment of the present invention;
fig. 6-8 are schematic structural views of the detachable solid-state circuit breaker body and the human-machine interface unit of the present invention;
fig. 9 is an embodiment of the assembly of the solid state circuit breaker body and the human interface unit of the present invention;
fig. 10 is yet another embodiment of the assembly of the solid state circuit breaker body and the human interface unit of the present invention;
fig. 11 is yet another embodiment of the assembly of the solid state circuit breaker body and the human interface unit of the present invention;
fig. 12-14 are schematic structural views of the solid-state circuit breaker with screw hole covers according to the present invention.
Detailed Description
The following description will further describe a specific embodiment of a solid-state circuit breaker according to the present invention with reference to the embodiments shown in the drawings. The present invention is not limited to the description of the following embodiments.
The utility model discloses a solid-state circuit breaker, including main switch unit and the power device switch unit of establishing ties in the major loop, respectively with the control module of main switch unit and power device switch unit connection, the control module controls the main switch unit closure earlier when closed, then controls power device switch unit and switches on, and control module controls power device switch unit earlier during the disconnection and ends, then controls the main switch unit disconnection. The power device switch unit of the solid-state circuit breaker is closed later, and the control mode of breaking is adopted firstly, so that the power device switch unit can effectively eliminate electric arcs at the moment of carrying out closing and breaking of a main loop, and meanwhile, the main switch unit can realize physical isolation, ensure the electricity utilization safety and does not need to be provided with a corresponding arc extinguish chamber like the traditional circuit breaker.
Preferably, the main switch unit includes an electromagnetic drive switch such as a relay or a contactor, the power device switch unit includes a power device switch, and the power device switch is a power device such as a power semiconductor, an IGBT power tube, a MOSFET power tube, an NPN power tube, a thyristor, an IGCT, an IGET, or a GTO. The control module comprises a main controller, the main controller is a microcontroller MCU or a singlechip and the like, and the main controller is connected with a coil of the main switch unit, or the main controller is connected with the electromagnetic drive switch through a drive circuit, or is connected with a control end of a relay or a contactor so as to drive the electromagnetic drive switch to be switched on or switched off; the main controller is connected with the control end of the power device switch to drive the power device switch to be switched on or switched off.
In an embodiment of the solid-state circuit breaker of the present invention, the main switch unit includes a relay, the power device switch unit includes an IGBT power tube, a contact of the relay is connected in series to the main circuit between the input terminal and the output terminal of the solid-state circuit breaker, and a C pole and an E pole of the IGBT power tube are connected in series to the main circuit between the input terminal and the output terminal of the solid-state circuit breaker; the control module comprises a main controller of a microcontroller MCU (microprogrammed control unit), and the microcontroller MCU is connected with a coil of the relay through a driving circuit and used for controlling the relay to be switched on or switched off; the microcontroller MCU is connected with the G pole of the IGBT power tube, when the solid-state circuit breaker is closed, the microcontroller MCU firstly controls the main switch unit to be closed, then controls the IGBT power tube to be switched on, and when the solid-state circuit breaker is switched off, the microcontroller MCU firstly controls the IGBT power tube to be switched off, and then controls the relay to be switched off.
As an improved embodiment of the present invention, the power device switch unit includes two power device switches connected in series according to opposite voltage drop directions, and the ac-dc circuit is implemented in common.
As shown in the embodiment of fig. 4, a working topology structure diagram of a single-phase solid-state circuit breaker, the main switch unit includes two electromagnetic driving switches, the two electromagnetic driving switches are relays K1 and K2, and the relays K1 and K2 are connected in series in the main circuit, so as to realize physical isolation of the circuit, completely cut off the power, and ensure safety; the power device switch unit comprises two power device switches Q1 and Q2, the power device switches Q1 and Q2 are connected in series in a main loop, voltage drop directions of the power device switches Q1 and Q2 are opposite, the power device switches Q1 and Q2 are connected in series in the main loop according to opposite directions of conducting pin terminals, a power switch with high power and high rated voltage is adopted, the circuit is operated under high voltage, coils of two relays K1 and K2 are coupled with a control module, and control terminals of the power device switches Q1 and Q2 are connected with the control module. When the circuit breaker is closed, the control module firstly closes the relays K1 and K2 to realize the closing of the main switch, and then switches on the power device switches Q1 and Q2; when the circuit breaker is disconnected, the control module firstly disconnects the power device switches Q1 and Q2 and then disconnects the main switches K1 and K2. Because the power device switch bears the energy generated at the moment of closing and opening the circuit, the non-arcing closing and opening of the circuit are realized, and the damage and safety accidents caused by the electric arc are avoided. In addition, parasitic diodes exist in the power device switches, so that voltage drop directions of the power device switches Q1 and Q2 in a main loop are opposite, namely voltage drop directions of the parasitic diodes of the power device switches Q1 and Q2 in the main loop are opposite, short circuit is avoided, current in a positive half cycle and current in a negative half cycle in a circuit can be controlled through the design, and alternating current and direct current can be achieved.
Specifically, as shown in fig. 4, the contacts of two relays K1 and K2 are respectively connected in series at two ends of the main circuit, two power device switches Q1 and Q2 are connected in series between two relays K1 and K2, in this embodiment, the two power device switches Q1 and Q2 are MOS transistors, the gates G of the control pins 1 of the two power device switches Q1 and Q2 are connected to the control module, the drain D of the first connection pin 2 of the power device switch Q1 is connected to the relay K1, the source S of the second connection pin 3 is connected to the source S of the second connection pin 3 of the power device switch Q2, the drain D of the first connection pin 2 of the power device switch Q2 is connected to the relay K2, that is, the power device switches Q1 and Q2 are connected in reverse to the main circuit conducting pin terminals, the drains D of the two power device switches Q1 and Q2 are connected to the two relays K1 and K2, respectively, the two power device switches each include a parasitic diode, the voltage drop directions of the parasitic diodes of the two power device switches in the main loop are opposite, in the figure, the anodes of the two parasitic diodes of the power device switches Q1 and Q2 are respectively connected with the two relays K1 and K2, and the cathodes of the two parasitic diodes are mutually connected. The two power device switches are connected in series in a mode that the voltage drop directions are opposite, and the universal use of the alternating current-direct current circuit is realized.
As shown in fig. 5, the operation topology of a three-phase solid-state circuit breaker is the same as that of a single-phase solid-state circuit breaker. The main switch unit comprises an electromagnetic drive switch, the electromagnetic drive switch is a relay K1, three groups of contacts of a relay K1 are respectively connected in series on a U, V, W three-phase main loop, a coil of the relay K1 is coupled with the control module, and the circuit physical isolation is realized through the main switch unit, so that the power is completely cut off, and the safety is guaranteed; the power device switch unit comprises three groups of power device switches which are respectively connected to U, V, W three-phase main loops, each group of power device switches comprises two power device switches, the two power device switches are connected in series in the corresponding phase main loops, the voltage drop directions of the two power device switches are opposite, and the control end of each power device switch is connected with the control module. Specifically, as shown in fig. 4, the power device switch unit includes power device switches Q1, Q2, Q3, Q4, Q5, and Q6, the power device switches Q1 and Q2 are connected in series to the main circuit of the U-phase, the power device switches Q1 and Q2 are connected in the main circuit of the U-phase in opposite voltage drop directions, the power device switches Q3 and Q4 are connected in series to the main circuit of the V-phase, the power device switches Q3 and Q4 are connected in opposite voltage drop directions, the power device switches Q5 and Q6 are connected in series to the main circuit of the W-phase, and the power device switches Q5 and Q6 are connected in opposite voltage drop directions. When the circuit breaker is closed, the control module firstly closes the relay K1 to close the main switch, and then switches on the power device switches Q1-Q6; when the circuit breaker is disconnected, the control module firstly disconnects the power device switches Q1-Q6 and then disconnects the relay K1. Because the power device switch bears the energy generated at the moment of closing and opening the circuit, the non-arcing closing and opening of the circuit are realized, and the damage and safety accidents caused by the electric arc are avoided; the two power device switches are connected in series in a mode that the voltage drop directions are opposite, and the universal use of the alternating current and direct current circuit is realized.
As shown in fig. 1, as another embodiment of the present invention, a solid-state circuit breaker includes a main switch unit and a power device switch unit connected in series in a main circuit, a current collecting module and a voltage collecting module respectively connected to the main circuit, and a control module respectively connected to the main switch unit, the power device switch unit, the current collecting module and the voltage collecting module, wherein the control module controls the main switch unit to be closed first when being closed, then controls the power device switch unit to be turned on, and controls the power device switch unit to be turned off first when being turned off, and then controls the main switch unit to be turned off; the control module monitors the current signal and the voltage signal of the load through the current acquisition module and the voltage acquisition module, and controls the circuit breaker to be disconnected to realize protection.
The current acquisition module and the voltage acquisition module respectively acquire a current signal and a voltage signal of a load and transmit the current signal and the voltage signal to the control module, a main controller of the control module analyzes and judges whether a fault exists or not, for example, instantaneous short-circuit protection and overload protection are performed, the current acquisition module is a current transformer, a main loop passes through the current transformer, the main controller judges whether a short circuit or overload occurs or not based on the current signal, when the short circuit or overload occurs, the control module firstly controls a power device switch unit to be cut off and then controls the main switch unit to be disconnected, and the short circuit and the overload protection of the solid-state circuit breaker are realized. Certainly, other fault judgment can be performed to realize protection based on the collected current and voltage signals, for example, the collected voltage is compared with an overvoltage threshold to judge whether the voltage is overvoltage or not, the collected voltage is compared with an undervoltage threshold to judge whether the voltage is undervoltage or not, the collected current is compared with an overcurrent threshold to judge whether the current is overcurrent or not, when the overvoltage or undervoltage or overcurrent exists, the control module drives the circuit breaker to be disconnected, overvoltage, undervoltage and overcurrent protection of the solid-state circuit breaker is realized, the performance requirement of the main controller is higher if excessive protection is realized, and the operation efficiency is reduced. The current collection module can be coupled between the power device switch unit and the load and arranged on the output side of the circuit breaker, and the voltage collection module can be connected to two ends of the load.
Preferably, as shown in fig. 1, the solid state circuit breaker further includes a communication module, and the solid state circuit breaker can communicate with the upper computer through the communication module. The communication mode of the communication module can be wired and/or wireless. The wired communication mode can adopt a Modbus protocol, and an RJ45 socket is arranged on the solid-state circuit breaker; the wireless communication mode is Bluetooth or wifi. Of course, other communication means may be used.
Preferably, as shown in fig. 1, the utility model discloses a solid-state circuit breaker still includes the human-computer interface module, and the human-computer interface module passes through communication module and is connected with control module, carries out information interaction and control, the human-computer interface is LED or LCD screen. The control module can display the working state of the solid-state circuit breaker, the monitored current and voltage information and the fault information; and carrying out parameter configuration on the circuit breaker through a human-computer interface.
Preferably, as shown in fig. 1, a surge protection module is further disposed on the main circuit of the solid-state circuit breaker to prevent components from being damaged by surge voltage and current in the circuit. The main controller is connected with the power device switch unit through an isolation driving circuit, for example, the main controller can be isolated through an optical coupler or a transformer to drive the power device switch unit to be switched on and off, and the main controller and the power device switch unit are protected. The main controller may also drive the main switch unit to be closed and opened through a driving circuit (not shown in the figure).
As shown in fig. 2, as another embodiment of the present invention, the present embodiment is different from the embodiment of fig. 1 in that a protection monitoring module is further provided, the current collecting module and the voltage collecting module are connected to the protection monitoring module, and the protection monitoring module is connected to the main controller of the control module.
The protection monitoring module monitors current and voltage signals transmitted by the current acquisition module and the voltage acquisition module, the protection monitoring module and the main controller perform data transmission and realize undervoltage protection, overcurrent protection, overvoltage protection, locked rotor protection, blocking protection, open-phase protection, ground protection, current unbalance protection, start overtime protection and the like in a matching way, and when a fault occurs, the main controller controls the power device switch unit to be cut off and then controls the main switch unit to be disconnected. Protection monitoring module includes the electric energy measurement chip, and the full-time collection and the calculation of being responsible for data provide perfect electric energy parameter data, main control unit be microprocessor MCU, carry out logic judgement to the data that protection monitoring module provided, drive circuit breaker disconnection during the trouble, through communication module and human-computer interface or not carry out the communication yet, reduce main control unit's work through the electric energy measurement chip that sets up, improve main control's reaction rate, be convenient for provide efficient circuit protection. The electric energy metering chip is a three-phase electric energy metering chip, a single-phase electric energy metering chip or other electric energy metering chips, for example, an ATT7022E electric energy metering chip is adopted.
As shown in fig. 3, as another embodiment of the utility model, the utility model discloses a solid-state circuit breaker and the difference of the embodiment of fig. 2 lie in that solid-state circuit breaker still has the soft start function, control module realizes the soft start through the angle of conduction of control power device switch, can start through the soft start mode when the motor is as the load, when the load starts, main control unit output drive signal, the ever-increasing voltage, the angle of conduction of power device switch is progressively increased, the motor accelerates gradually, switch on all until the power device switch, the motor works at rated voltage, realize smooth start, reduce starting current, solid-state circuit breaker overcurrent tripping operation when avoiding starting, insert solid-state circuit breaker between power and the motor stator. When the solid-state circuit breaker is closed, soft start is adopted to protect load equipment, so that the starting current meets the requirements of the relevant standards of the power quality of a power grid, the voltage sag amplitude is reduced, and the content of higher harmonics is reduced.
Preferably, the solid-state circuit breaker of this embodiment has the power regulatory function of current real time monitoring, and in load equipment operation process, the control module carries out real-time current monitoring through current acquisition module, if the electric current is too big, is greater than preset power regulation current threshold, and the control module drives the conduction angle of power device switch and reduces, reduces the electric current, realizes power regulation, protection circuit and load equipment. The control module obtains a current signal of the current acquisition module, and when the current is too large, the control module adjusts the conduction angle of the power device switch, so that the conduction angle of the power device switch is reduced, the current is reduced, and the power adjustment is realized.
The solid-state circuit breaker of this embodiment has soft start control function and real-time current monitoring power control function, and when the major loop was closed, through soft start control function, the protection of non-resistance nature loads such as realization motor, at the operation in-process, through real-time current monitoring function, realization power control makes the utility model discloses a solid-state circuit breaker can regard as starting and protection system, replaces contactor, thermal relay, soft starter to be connected with the motor, and the cost is reduced also ensures that the system is safe high-efficient more simultaneously.
Preferably, the solid-state circuit breaker comprises a human-computer interface module, the human-computer interface module is connected with the control module through the communication module, and whether the soft start function is started or not can be selected through the human-computer interface module. A user can select whether to open the soft start control technology according to the load characteristics, when the load is a non-resistive load such as a motor, the soft start control is opened, and when the load is a pure resistive load, the soft start control can be closed.
As shown in fig. 6-8, the utility model discloses a solid-state circuit breaker's improvement still, including solid-state circuit breaker body 100 and with the independent human-computer interface unit 200 that can solid-state circuit breaker body 100 separation, solid-state circuit breaker body 100 and human-computer interface unit 200 pass through communication module and connect, human-computer interface unit 200 can assemble on solid-state circuit breaker body 100, also can take off from solid-state circuit breaker body 100, when the user has remote operation's demand, can take out human-computer interface unit 200, install human-computer interface unit 200 alone and use, for example, install on the switch board cabinet door, when needs control solid-state circuit breaker body 100 break-make, need not to open the switch board door, the mode of operation solid-state circuit breaker is nimble various.
The communication mode between the solid-state circuit breaker body 100 and the human-machine interface unit 200 can be wired and/or wireless. The wired communication mode preferably adopts a Modbus protocol, an RJ45 socket is arranged on the solid-state circuit breaker body 100, an RJ45 socket is arranged on the back of the human-computer interface unit 200, and the solid-state circuit breaker body 100 and the human-computer interface unit 200 can be connected through a data line of an RJ45 plug when assembled together or separated from each other to complete data communication. The wireless communication mode is preferably bluetooth or wifi, and the solid-state circuit breaker body 100 and the human-computer interface unit 200 can communicate in the wireless communication mode when assembled together or separated.
Preferably, when the solid-state circuit breaker body 100 and the human-machine interface unit 200 communicate in a wired manner, the human-machine interface unit 200 is powered by the solid-state circuit breaker body 100, and the solid-state circuit breaker body 100 supplies power to the human-machine interface unit 200 through the RJ45 port.
Preferably, when the solid-state circuit breaker body 100 communicates with the human-computer interface unit 200 in a wireless manner, a storage battery is arranged in the human-computer interface unit 200, when the human-computer interface unit 200 is installed on the solid-state circuit breaker body 100, the solid-state circuit breaker body 100 charges the storage battery of the human-computer interface unit 200 in a wireless charging manner, and after the wireless charging is completed, the requirement for electric energy during remote control after the human-computer interface unit 200 is detached from the solid-state circuit breaker body 100 can be met. Of course, the human-computer interface unit 200 may also be provided with a charging jack, through which the battery is charged.
The main internal functions of the solid-state circuit breaker body 100 include circuit protection and circuit monitoring, and include a control module, a main circuit module for performing on/off of a main circuit, a communication module (including a wired communication circuit and/or a wireless communication circuit), a current collection module, a voltage collection module, and a power supply module for supplying power to circuits such as the control module. Preferably also a wireless charging circuit. The main loop module can be formed by mixing a main switch unit and a power device switch unit to be connected in series on a main loop as in the previous embodiment; the power device switch unit can be a mechanical switch which only comprises the power device switch unit connected in series and is not provided with the main switch unit, and the power device switch unit is connected with the control module. The control module comprises a main controller, the main controller is a microcontroller MCU or a singlechip, the main controller controls the on-off of a main loop and protects the on-off of the main loop, the main controller is communicated with the human-computer interface unit 200 through the communication module, and the main controller controls the on-off of the main loop when receiving the on-off command of the human-computer interface unit 200; the main controller can realize the on-off and protection of the main circuit under the condition of not being controlled by the human-computer interface unit 200.
The human-computer interface unit 200 mainly includes a unit power circuit, a unit communication module (wired communication circuit and/or wireless communication circuit), a battery and battery management unit module, and a human-computer interface interaction module. Preferably, the wireless charging receiving circuit is further included. The unit power circuit may receive wired power from the solid state circuit breaker body 100 and power from the battery to provide electrical power to the human interface unit 200. The human-computer interface interaction module comprises a unit controller, the unit controller is a microcontroller MCU or a single chip microcomputer and is used for controlling parameter input and data display, as shown in fig. 3, the human-computer interface interaction module comprises a display screen and/or control keys 202 and/or status indicator lights 203 which are connected with the unit controller, the display screen is a touch screen 201, control parameters can be input through the touch screen 201 and/or the control keys 202, the control keys 202 comprise keys for controlling the states of the solid-state circuit breaker body 100, such as start, standby and stop, the touch screen 201 can display data, and the status indicator lights 203 can also display data.
Preferably, the human-computer interface unit 200 and the solid-state circuit breaker body 100 may perform one-to-one communication control, or may perform one-to-many communication control, and the communication control setting between the control unit and the solid-state circuit breaker body 100 may be modified.
Preferably, as shown in the three embodiments of fig. 9 to 11, the solid-state circuit breaker body 100 and the human-machine interface unit 200 are fixed by a structure of a snap and/or a card slot, and can be easily disassembled.
As shown in the embodiment of fig. 9, a back protrusion 212 is formed on the back surface of the human-computer interface unit 200 connected to the solid-state circuit breaker body 100, an assembly groove 211 for accommodating the back protrusion 212 is formed on the front surface of the solid-state circuit breaker body 100 connected to the human-computer interface unit 200, a limit clip groove is formed on the side edge of the back protrusion 212, a limit clip is arranged on the corresponding side edge of the assembly groove 211, the back protrusion 212 of the human-computer interface unit 200 is installed in the assembly groove 211, and the limit clip groove is fixed to the limit clip groove in a matching manner. Specifically, back bellying 212 becomes square bulge, square bulge's area slightly is less than the back area of human-computer interface unit 200, back bellying 212 forms rounding off all around, be equipped with the first spacing draw-in groove 214 of bar at the downside side of back bellying 212, the upside side is equipped with a plurality of first spacing buckle bumps, the side forms rounding off inclined plane to the bottom direction all around in assembly groove 211 of corresponding human-computer interface unit 200, and assembly groove 211 is equipped with the spacing buckle strip 213 of bellied second with first spacing draw-in groove 214 complex, and with the spacing draw-in groove 215 of a plurality of first spacing buckle bump complex second. When assembled, the human interface unit 200 is push-fitted in a direction perpendicular to the front surface of the solid-state circuit breaker body 100.
As shown in the embodiment of fig. 10, a U-shaped slot 221 formed by a U-shaped limiting protruding rib is disposed on the front surface of the solid-state circuit breaker body 100 connected to the human-computer interface unit 200, an opening of the U-shaped slot 221 faces upward, a limiting protrusion 222 matched with the U-shaped slot 221 is disposed on the back surface of the human-computer interface unit 200 connected to the solid-state circuit breaker body 100, and the limiting protrusion 222 slides downward from the side above the opening of the U-shaped slot 221 and is clamped into the U-shaped slot 221, so that the solid-state circuit breaker body 100 and the human-computer interface unit 200 are mounted. Furthermore, guide limiting grooves arranged along the assembly direction are formed in the side walls of the two sides of the U-shaped clamping groove 221, raised guide limiting strips matched with the guide limiting grooves are formed in the side walls of the two sides of the limiting projection 222, and when the limiting projection 222 of the human-computer interface unit 200 is slidably mounted in the U-shaped clamping groove 221, the guide limiting strips are inserted into the guide limiting grooves.
As shown in fig. 11, the upper and lower sides of the front surface of the solid-state circuit breaker body 100 connected to the human-machine interface unit 200 are respectively provided with a protruding elastic latching arm 231, the distance between the elastic latching arms 231 on the upper and lower sides is matched with the height of the human-machine interface unit 200, the human-machine interface unit 200 is integrally latched in the latching slot formed by the elastic latching arms 231 on the upper and lower sides, and the elastic latching arm 231 plays a role in supporting and latching the human-machine interface unit 200. During assembly, the human-computer interface unit 200 is obliquely placed on the lower elastic buckling arm 231, and then the lower elastic buckling arm 231 is used as a support to be rotatably pushed into the clamping groove, so that the upper elastic buckling arm 231 is clamped with the upper side of the human-computer interface unit 200.
Of course, the solid-state circuit breaker body 100 and the human-machine interface unit 200 may be fixed by other fastening and/or fastening structures.
Preferably, as shown in fig. 12 to 14, in another embodiment, the surface of the solid-state circuit breaker provided with the human-machine interface unit 200 is a front surface, a screw hole for accommodating a binding screw is provided on the front surface of the solid-state circuit breaker, and the solid-state circuit breaker further includes a screw hole cover 300, wherein the screw hole cover 300 is in snap-fit connection with the solid-state circuit breaker and covers the screw hole. As shown in fig. 12, a first connection terminal and a second connection terminal are respectively arranged at two ends of the solid-state circuit breaker and are used as an input end and an output end, a first screw hole 141 and a second screw hole 142 for installing connection screws corresponding to the first connection terminal and the second connection terminal are arranged on the front surface of the solid-state circuit breaker, the screw hole cover 300 is connected with the solid-state circuit breaker in a buckling mode and covers the first screw hole 141 and the second screw hole 142, after wiring of a user is completed, the screw hole cover 300 is installed to cover the screw holes for fixing incoming and outgoing lines, so that the connection screws in the screw hole cover are invisible, and safety is improved.
As shown in fig. 12 to 14, the solid-state circuit breaker includes a solid-state circuit breaker body 100 and a human-machine interface unit 200, in this embodiment, the human-machine interface unit 200 and the solid-state circuit breaker body 100 are an integrated structure, the human-machine interface unit 200 is fixedly mounted on the solid-state circuit breaker body 100, and of course, the human-machine interface unit 200 and the solid-state circuit breaker body 100 may also be a detachable assembly structure. A control module, a main circuit module for executing the on-off of a main circuit, a communication module and the like are arranged in the solid-state circuit breaker body 100, and the main circuit module can be formed by mixing a main switch unit and a power device switch unit and connected in series on the main circuit as in the previous embodiment; the circuit breaker also can be a mechanical switch which only comprises a power device switch unit connected in series and is not provided with a main switch unit, the power device switch unit is connected with a control module, and the control module drives the power device switch unit to be switched on or switched off to realize the on-off of the circuit breaker. The control module comprises a main controller which is a microcontroller MCU or a singlechip, and the main controller controls the on-off of the main loop and protects the main loop
Preferably, the screw hole cover 300 is an independent plastic cover, the screw hole cover 300 is integrally formed, and a unit avoiding hole 302 for avoiding the human-machine interface unit 200 is formed in the middle of the screw hole cover, so that the human-machine interface unit 200 can protrude. The size of the screw hole cover 300 is determined according to the position of the solid-state circuit breaker body 100 and the first screw hole 141 and the second screw hole 142, and is substantially matched with the area of the front surface of the solid-state circuit breaker body 100.
Preferably, the screw hole cover 300 is fixed to the solid-state circuit breaker by means of a snap and/or a slot. As shown in fig. 13 to 14, a cover plate slot 141 is provided on the solid-state circuit breaker body 100, a cover plate protruding rib 301 that is matched with the cover plate slot 141 is provided on the back surface of the screw hole cover 300 connected to the solid-state circuit breaker body 100 in a protruding manner, and when the screw hole cover 300 is installed on the solid-state circuit breaker body 100, the cover plate protruding rib 301 is clamped into the cover plate slot 141 and fixed. Of course, the solid-state circuit breaker body 100 may be provided with a clip, and the screw hole cover 300 may be provided with a card slot.
Preferably, the two ends of the solid-state circuit breaker body 100 are both provided with a cover plate clamping groove 141, the cover plate clamping groove 141 at one end is located between the plurality of first screw holes 141 at one end of the solid-state circuit breaker body 100, and the cover plate clamping groove 141 at the other end is located between the plurality of second screw holes 142 at the other end of the solid-state circuit breaker body 100; the two ends of the screw hole cover 300 are correspondingly provided with cover plate convex ribs 301.
Preferably, the cover plate slot 141 is T-shaped, and the cover plate rib 301 is T-shaped.
Preferably, the screw hole cover 300 is provided with an observation hole 303 at a position corresponding to the cover plate rib 301, so as to facilitate assembly.
As another preferred embodiment, solid-state circuit breaker body 100 and human-computer interface unit 200 be detachable assembly structure, human-computer interface unit 200 is installed on solid-state circuit breaker body 100 through the mode of buckle and/or draw-in groove, and the face of solid-state circuit breaker body 10 installation human-computer interface unit 200 is the solid-state circuit breaker openly, screw escutcheon 300 middle part be equipped with unit dodge hole 302, and the side of unit dodge hole 302 is to keeping away from the protruding hole lateral wall that dodges that forms in one side of solid-state circuit breaker body 100, dodge the side of hole lateral wall and keep away from solid-state circuit breaker body 100 to unit dodge hole 302 extension and be equipped with the spacing arch of side for spacing human-computer interface unit 200's front edge. When the screw hole cover 300 is installed on the solid-state circuit breaker body 100, the front edge of the human-machine interface unit 200 is simultaneously limited through the screw hole cover 300, and the display and operation of the human-machine interface unit 200 are not affected.
When the solid-state circuit breaker is mounted, overhauled and disassembled, the screw hole cover is taken down, and the nut for fixing the incoming and outgoing lines can be operated; after accomplishing installation, maintenance and dismantling solid state circuit breaker, on putting back the solid state circuit breaker body with the screw hole cover, the screw hole is sheltered like this, promotes the product security.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (10)
1. The utility model provides a solid-state circuit breaker, includes main switch unit and the power device switch unit of establishing ties in the major loop, current acquisition module and the voltage acquisition module of being connected with the major loop respectively, the control module who is connected with main switch unit, power device switch unit, current acquisition module and voltage acquisition module respectively, control module controls the main switch unit closure earlier when closing, then control power device switch unit switches on, control module controls power device switch unit earlier during the disconnection and ends, then control the disconnection of main switch unit, power device switch unit includes the power device switch, its characterized in that: the solid-state circuit breaker has a soft start function, and when a load is started, the control module drives the conduction angle of the power device switch to gradually increase to realize soft start.
2. The solid state circuit breaker of claim 1, wherein: and in the load operation process, the control module carries out real-time current monitoring through the current acquisition module, and if the current is greater than a preset power regulation current threshold value, the control module drives the conduction angle of the power device switch to be reduced to realize power regulation.
3. The solid state circuit breaker of claim 1, wherein: the solid-state circuit breaker comprises a human-computer interface module, the human-computer interface module is connected with the control module through the communication module, and whether the soft start function is started or not can be selected through the human-computer interface module.
4. The solid state circuit breaker of claim 1, wherein: the power device switch unit comprises two power device switches which are connected in series in the main loop, and the voltage drop directions of the two power device switches are opposite.
5. The solid state circuit breaker of claim 4, wherein: the two power device switches comprise parasitic diodes, and the voltage drop directions of the parasitic diodes of the two power device switches in the main loop are opposite.
6. The solid state circuit breaker of claim 1, wherein: the control module comprises a main controller, the main controller is a microcontroller MCU or a single chip microcomputer, the main controller monitors current signals and voltage signals of loads through a current acquisition module and a voltage acquisition module, and when a fault occurs, the main controller control module firstly controls the power device switch unit to be cut off and then controls the main switch unit to be disconnected.
7. The solid state circuit breaker of claim 1, wherein: the control module comprises a main controller and a protection monitoring module, the current acquisition module and the voltage acquisition module are connected with the protection monitoring module, the protection monitoring module is connected with the main controller of the control module, the protection monitoring module monitors current and voltage signals transmitted by the current acquisition module and the voltage acquisition module, the protection monitoring module and the main controller carry out data transmission, the main controller carries out logic judgment on data provided by the protection monitoring module, and the circuit breaker is driven to be disconnected during faults.
8. The solid state circuit breaker of claim 1, wherein: the solid-state circuit breaker also comprises a communication module, and the solid-state circuit breaker can communicate with an upper computer through the communication module; and a surge protection module is also arranged on a main loop of the solid-state circuit breaker.
9. The solid state circuit breaker of claim 1, wherein: the main switch unit comprises a relay or a contactor; the power device switch is an IGBT power tube or a MOSFET power tube or an NPN power tube or a thyristor or an IGCT.
10. The solid state circuit breaker of claim 1, wherein: the main switch unit comprises a relay K1, three groups of contacts of the relay K1 are respectively connected in series on a U, V, W three-phase main loop, and a coil of the relay K1 is coupled with the control module; the power device switch unit comprises three groups of power device switches which are respectively connected to U, V, W three-phase main loops, each group of power device switches comprises two power device switches, the two power device switches are connected in series in the corresponding phase main loops, the voltage drop directions of the two power device switches are opposite, and the control end of each power device switch is connected with the control module;
or, the main switch unit comprises relays K1 and K2, the relays K1 and K2 are connected in series in a main loop, the power device switch unit comprises two power device switches Q1 and Q2, the power device switches Q1 and Q2 are connected in series in the main loop, voltage drop directions of the power device switches Q1 and Q2 are opposite, coils of the two relays K1 and K2 are coupled with the control module, and control terminals of the power device switches Q1 and Q2 are connected with the control module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021362914.XU CN213185474U (en) | 2020-07-13 | 2020-07-13 | Solid-state circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021362914.XU CN213185474U (en) | 2020-07-13 | 2020-07-13 | Solid-state circuit breaker |
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| CN213185474U true CN213185474U (en) | 2021-05-11 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113852051A (en) * | 2021-09-13 | 2021-12-28 | 中国科学院电工研究所 | Direct-current solid-state circuit breaker with bidirectional breaking and soft starting functions and control method |
| WO2023202624A1 (en) * | 2022-04-20 | 2023-10-26 | 施耐德电气工业公司 | Method and apparatus for operating conduction assembly, starting apparatus and computer readable medium |
| CN117333971A (en) * | 2023-10-23 | 2024-01-02 | 苏州琨山通用锁具有限公司 | Intelligent lockset-based room electricity taking control system and electricity taking method |
| CN117439012A (en) * | 2023-12-21 | 2024-01-23 | 天津航空机电有限公司 | Solid-state combined type power electronic hybrid switch protection device based on direct current system |
| CN117437712A (en) * | 2023-11-01 | 2024-01-23 | 苏州琨山通用锁具有限公司 | Smart home power management system |
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2020
- 2020-07-13 CN CN202021362914.XU patent/CN213185474U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113852051A (en) * | 2021-09-13 | 2021-12-28 | 中国科学院电工研究所 | Direct-current solid-state circuit breaker with bidirectional breaking and soft starting functions and control method |
| WO2023202624A1 (en) * | 2022-04-20 | 2023-10-26 | 施耐德电气工业公司 | Method and apparatus for operating conduction assembly, starting apparatus and computer readable medium |
| CN117333971A (en) * | 2023-10-23 | 2024-01-02 | 苏州琨山通用锁具有限公司 | Intelligent lockset-based room electricity taking control system and electricity taking method |
| CN117437712A (en) * | 2023-11-01 | 2024-01-23 | 苏州琨山通用锁具有限公司 | Smart home power management system |
| CN117437712B (en) * | 2023-11-01 | 2024-05-31 | 苏州琨山通用锁具有限公司 | Smart home power management system |
| CN117439012A (en) * | 2023-12-21 | 2024-01-23 | 天津航空机电有限公司 | Solid-state combined type power electronic hybrid switch protection device based on direct current system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: ZHEJIANG CHINT ELECTRICS Co.,Ltd. Assignor: Shanghai Chint Intelligent Technology Co.,Ltd. Contract record no.: X2021330000592 Denomination of utility model: Solid state circuit breaker Granted publication date: 20210511 License type: Common License Record date: 20211026 |
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| EE01 | Entry into force of recordation of patent licensing contract |