Power supply circuit of circuit breaker control device and circuit breaker control device

Abstract

The utility model provides a power supply circuit of a circuit breaker control device and the circuit breaker control device. The power supply circuit of the circuit breaker control device comprises a channel switching unit and an energy storage unit. The channel switching unit comprises a first input end used for being connected with commercial power, a second input end electrically connected with the output end of the energy storage unit, an output end used for being electrically connected with the power supply end of the main control unit, and a driving end electrically connected with the output end of the main control unit. And the channel switching unit is used for controlling the conduction of a line between the mains supply and the power supply end of the main control unit or controlling the conduction of a line between the output end of the energy storage unit and the power supply end of the main control unit under the driving of the main control unit, so that the main control unit can control the circuit breaker after being electrified. The channel switching unit is arranged to control the on-off of the commercial power supply and the energy storage unit power supply at the same time, so that the purpose of operation in only one power supply mode at the same time is achieved, and the power consumption of the energy storage unit or the additional charging of an electric meter is not increased.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, and particularly relates to a power supply circuit of a circuit breaker control device and the circuit breaker control device. Background Art

[0002] The external circuit breaker of an intelligent electric energy meter is a key device for realizing the remote fee control function in cooperation with the Internet of Things electric energy meter, and is an important link in promoting the digital transformation of the operation electric information acquisition management. It specifically includes a circuit breaker execution device and a circuit breaker control device.

[0003] The main control unit in the circuit breaker control device usually adopts two power supply modes: mains power and energy storage unit. In the prior art, corresponding switching units are usually used to control the mains power and the energy storage unit respectively. However, due to certain control errors or delays, it is easy to cause the two power supply modes of the mains power and the energy storage unit to operate simultaneously, which will increase the power consumption of the energy storage unit or increase the additional billing of the electric meter. Summary of the Utility Model

[0004] In view of the deficiencies in the prior art, the utility model provides a power supply circuit of a circuit breaker control device and the circuit breaker control device.

[0005] In a first aspect, in an embodiment, the utility model provides a power supply circuit of a circuit breaker control device, including a channel switching unit and an energy storage unit;

[0006] The channel switching unit includes a first input terminal for accessing the mains power, a second input terminal electrically connected to the output terminal of the energy storage unit, an output terminal for electrically connecting to the power supply terminal of the main control unit, and a driving terminal electrically connected to the output terminal of the main control unit;

[0007] The channel switching unit is used to control the conduction of the line between the mains power and the power supply terminal of the main control unit or control the conduction of the line between the output terminal of the energy storage unit and the power supply terminal of the main control unit under the drive of the main control unit, so that the main control unit can control the circuit breaker after power-on.

[0008] In an embodiment, the power supply circuit of the circuit breaker control device further includes a mains power supply processing unit and an energy storage power supply processing unit;

[0009] The mains power supply processing unit is connected in series between the mains power and the power supply terminal of the main control unit, and the energy storage power supply unit is connected in series between the energy storage unit and the power supply terminal of the main control unit.

[0010] In an embodiment, the mains power supply processing unit includes a rectification unit and a step-down unit;

[0011] The rectifying unit includes an input terminal for connecting to the mains power supply and an output terminal electrically connected to the input terminal of the step-down unit. The step-down unit further includes an output terminal electrically connected to the power supply terminal of the main control unit.

[0012] In one embodiment, the rectifying unit includes an output terminal electrically connected to the input terminal of the step-down unit through the first input terminal and the first output terminal of the channel switching unit. The channel switching unit further includes a second input terminal electrically connected to the output terminal of the energy storage power supply processing unit and a second output terminal electrically connected to the power supply terminal of the main control unit;

[0013] The channel switching unit is configured to control the conduction of the line between the output terminal of the rectifying unit and the input terminal of the step-down unit or control the conduction of the line between the output terminal of the energy storage power supply processing unit and the power supply terminal of the main control unit under the drive of the main control unit.

[0014] In one embodiment, the channel switching unit includes an electromagnetic switch and an H-bridge drive circuit;

[0015] The contact in the electromagnetic switch includes a first end electrically connected to the output terminal of the rectifying unit, a second end electrically connected to the input terminal of the step-down unit, a third end electrically connected to the output terminal of the energy storage power supply processing unit, and a fourth end electrically connected to the power supply terminal of the main control unit;

[0016] The coil in the electromagnetic switch includes a first end electrically connected to the first output terminal of the H-bridge drive circuit and a second end electrically connected to the second output terminal of the H-bridge drive circuit;

[0017] The H-bridge drive circuit further includes a first drive end electrically connected to the first output terminal of the main control unit and a second drive end electrically connected to the second output terminal of the main control unit.

[0018] In one embodiment, the switch includes a magnetic latching relay.

[0019] In one embodiment, the rectifying unit includes a varistor, a fuse resistor, and a rectifying diode;

[0020] The varistor includes a first end respectively electrically connected to the first end of the fuse resistor and the live wire corresponding to the mains power supply, and a second end electrically connected to the neutral wire corresponding to the mains power supply and grounded;

[0021] The rectifying diode includes an anode electrically connected to the second end of the fuse resistor and a cathode electrically connected to the input terminal of the step-down unit.

[0022] In one embodiment, the energy storage power supply processing unit includes a bidirectional TVS tube and an anti-reverse diode;

[0023] The bidirectional TVS tube includes a first end respectively electrically connected to the anode of the anti-reverse diode and the positive electrode of the energy storage unit, and a second end electrically connected to the negative electrode of the energy storage unit and grounded.

[0024] In one embodiment, the energy storage unit includes a battery and a micro switch;

[0025] The battery includes a positive electrode electrically connected to the power supply terminal of the main control unit and a negative electrode electrically connected to the first end of the micro switch;

[0026] The micro switch further includes a second end electrically connected to the neutral line corresponding to the mains power supply and grounded;

[0027] The micro switch is used to be triggered and turned on due to the acting force of the battery after the battery is installed.

[0028] In a second aspect, in one embodiment, the present utility model provides a circuit breaker control device, including the power supply circuit of the circuit breaker control device in any of the above embodiments.

[0029] Through the power supply circuit of the above circuit breaker control device and the circuit breaker control device, a channel switching unit is set to simultaneously control the on / off of the mains power supply and the energy storage unit power supply; when the line between the mains power supply and the main control unit is controlled to be turned on, the line between the energy storage unit and the main control unit is in an off state; conversely, when the line between the energy storage unit and the main control unit is controlled to be turned on, the line between the mains power supply and the main control unit is in an off state; thus achieving the purpose of only one power supply mode operating at the same time, without increasing the power consumption of the energy storage unit or increasing the additional billing of the electricity meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiment descriptions. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of the circuit breaker control device in an embodiment of the present utility model;

[0032] Figure 2 It is a schematic structural diagram of the circuit breaker control device including a mains power supply processing unit and an energy storage power supply processing unit in an embodiment of the present utility model;

[0033] Figure 3 It is a schematic structural diagram of the circuit breaker control device including the specific structure of the mains power supply processing unit in an embodiment of the present utility model;

[0034] Figure 4 It is a schematic structural diagram of the circuit breaker control device with a rectification unit and a step-down unit respectively arranged on both sides of the channel switching unit in an embodiment of the present utility model;

[0035] Figure 5 Schematic diagram of the specific circuit implementation of the channel switching unit in an embodiment of the present utility model;

[0036] Figure 6 Schematic diagram of the specific circuit implementation of the rectification unit in an embodiment of the present utility model;

[0037] Figure 7 Schematic diagram of the specific circuit implementation of the energy storage power supply processing unit in an embodiment of the present utility model;

[0038] Figure 8 Schematic diagram of the specific circuit implementation of the energy storage unit in an embodiment of the present utility model;

[0039] Figure 9 Installation schematic diagram of the energy storage unit in an embodiment of the present utility model. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present utility model.

[0041] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined. In the present application, the term "exemplary" is used to mean "serving as an example, illustration, or explanation". Any embodiment described as "exemplary" in the present application is not necessarily construed as being more preferred or having more advantages than other embodiments. In order to enable any person skilled in the art to implement and use the present utility model, the following description is given. In the following description, details are set forth for purposes of explanation. It should be understood that those of ordinary skill in the art can recognize that the present utility model can be implemented without the use of these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid unnecessary details from obscuring the description of the present utility model. Therefore, the present utility model is not intended to be limited to the embodiments shown, but is consistent with the broadest scope that conforms to the principles and features disclosed in the present application.

[0042] In a first aspect, as Figure 1 shown, in one embodiment, the present utility model provides a power supply circuit for a circuit breaker control device, including a channel switching unit and an energy storage unit.

[0043] In Figure 1 , the channel switching unit includes a first input terminal for accessing the commercial power, a second input terminal electrically connected to the output terminal of the energy storage unit, an output terminal for electrically connecting to the power supply terminal of the main control unit, and a driving terminal electrically connected to the output terminal of the main control unit.

[0044] Among them, the channel switching unit is used to control the conduction of the line between the commercial power and the power supply terminal of the main control unit or control the conduction of the line between the output terminal of the energy storage unit and the power supply terminal of the main control unit under the drive of the main control unit, so that the main control unit can control the circuit breaker after power-on.

[0045] That is to say, driven by the master control unit, the channel switching unit has two working states. When the master control unit controls the channel switching unit to be in the first working state, the first input end and the output end of the channel switching unit are connected and the second input end and the output end are disconnected, so that only the power supply mode corresponding to the mains power can operate. When the master control unit controls the channel switching unit to be in the second working state, the second input end and the output end of the channel switching unit are connected and the first input end and the output end are disconnected, so that only the power supply mode corresponding to the energy storage unit can operate.

[0046] Among them, the master control unit can be a Bluetooth SOC. A Bluetooth SOC (System on Chip) is an integrated circuit chip that integrates all necessary computer and wireless communication functions on a single silicon chip. These functions include a processor, memory, input / output (I / O) interfaces, and a Bluetooth wireless communication module, etc.

[0047] Through the power circuit of the above circuit breaker control device, the channel switching unit is set to control the on / off of both the mains power supply and the energy storage unit power supply; when the line between the mains power and the master control unit is controlled to be conductive, the line between the energy storage unit and the master control unit is disconnected; conversely, when the line between the energy storage unit and the master control unit is controlled to be conductive, the line between the mains power and the master control unit is disconnected; thus achieving the purpose of having only one power supply mode operating at the same time, without increasing the power consumption of the energy storage unit or increasing the extra billing of the electricity meter.

[0048] As Figure 2 shown, in one embodiment, the power circuit of the circuit breaker control device further includes a mains power supply processing unit and an energy storage power supply processing unit.

[0049] In Figure 2 it, the mains power supply processing unit is connected in series between the mains power and the power supply end of the master control unit (specifically connected in series between the mains power and the first input end of the channel switching unit), and the energy storage power supply unit is connected in series between the energy storage unit and the power supply end of the master control unit (specifically connected in series between the energy storage unit and the second input end of the channel switching unit).

[0050] Among them, if the corresponding power supply processing unit is integrated in the master control unit, the power supply output by the mains power and the power supply output by the energy storage unit can be directly electrically connected to the master control unit, so as to perform relevant processing based on the power supply processing unit inside the master control unit to obtain the actually required power supply. However, usually the master control unit does not integrate the corresponding power supply processing unit. Therefore, for this situation, this embodiment adds a mains power supply processing unit and an energy storage power supply processing unit to respectively perform relevant processing on the power supply output by the mains power and the power supply output by the energy storage unit, so as to output the actually required power supply to the master control unit.

[0051] As Figure 3As shown, in one embodiment, the mains power supply processing unit includes a rectification unit and a buck unit.

[0052] In Figure 3 , the rectification unit includes an input end for accessing the mains power and an output end electrically connected to the input end of the buck unit. The buck unit further includes an output end electrically connected to the power supply end of the main control unit.

[0053] Among them, the mains power outputs alternating current with a relatively high voltage amplitude, while the main control unit usually requires direct current with a relatively low voltage amplitude. Therefore, the mains power supply processing unit at least needs to include a rectification unit for rectification and a buck unit for bucking. After the accessed mains power is processed by the rectification unit and the buck unit, it can be converted from alternating current with a relatively high voltage amplitude to direct current with a relatively low voltage amplitude to meet the requirements of the main control unit.

[0054] As Figure 4 shown, in one embodiment, the rectification unit includes an output end electrically connected to the input end of the buck unit through the first input end and the first output end of the channel switching unit. The channel switching unit further includes a second input end electrically connected to the output end of the energy storage power supply processing unit and a second output end electrically connected to the power supply end of the main control unit.

[0055] Among them, in the above embodiment, referring to Figure 2 or Figure 3 , both the mains power supply processing unit and the energy storage power supply processing unit are respectively connected in series on the input side of the channel switching unit. The power supplies output by the mains power supply processing unit and the energy storage power supply processing unit are both power supplies that meet the power supply requirements of the main control unit. Therefore, the two power supplies can be directly converged to an output end of the channel switching unit for output.

[0056] And in Figure 4 , the rectification unit and the buck unit in the mains power supply processing unit are respectively connected in series on the input side and the output side of the channel switching unit, while the energy storage power supply processing unit is connected in series on the input side of the channel switching unit. The power supply output by the rectification unit is not a power supply that meets the power supply requirements of the main control unit. Therefore, the power supply output by the rectification unit needs to be processed by the buck unit after passing through the channel switching unit before it can be provided to the main control unit. At the same time, the power supply output by the energy storage power supply processing unit is a power supply that meets the power supply requirements of the main control unit. Therefore, the power supply output by the energy storage power supply processing unit can be directly provided to the main control unit after passing through the channel switching unit.

[0057] Based on the differences described above, the power supplies output by the two power supply methods cannot be converged to one output terminal through the channel switching unit. Therefore, in response to this situation, the channel switching unit is provided with two output terminals. The power supply output by the rectification unit is input from the first input terminal of the channel switching unit. When the first input terminal and the first output terminal of the channel switching unit are connected, this power supply is then output to the buck unit through the first output terminal of the channel switching unit; similarly, the power supply output by the energy storage power supply processing unit is input from the second input terminal of the channel switching unit. When the second input terminal and the second output terminal of the channel switching unit are connected, this power supply is then output to the main control unit through the second output terminal of the channel switching unit.

[0058] Based on Figure 4 Shown in the connection relationship, the channel switching unit is used to control the conduction of the line between the output terminal of the rectification unit and the input terminal of the buck unit (i.e., control the connection between the first input terminal and the first output terminal of the channel switching unit) or control the conduction of the line between the output terminal of the energy storage power supply processing unit and the power supply terminal of the main control unit (i.e., control the connection between the second input terminal and the second output terminal of the channel switching unit) under the drive of the main control unit.

[0059] As Figure 5 shown, in one embodiment, the channel switching unit includes a magnetic latching relay K1 and an H-bridge drive circuit. The H-bridge drive circuit includes PMOS transistor Q2, PMOS transistor Q3, NMOS transistor Q4, NMOS transistor Q5, voltage drop resistor R10, and voltage drop resistor R8.

[0060] In Figure 5 it, the first end of the contact in the magnetic latching relay K1 (i.e., pin 6 of the magnetic latching relay K1) is electrically connected to the output terminal of the rectification unit to access the power signal L1. The second end of the contact in the magnetic latching relay K1 (i.e., pin 5 of the magnetic latching relay K1) is electrically connected to the input terminal of the buck unit to output the power signal HV. The third end of the contact in the magnetic latching relay K1 (i.e., pin 3 of the magnetic latching relay K1) is electrically connected to the output terminal of the energy storage power supply processing unit to access the power signal BATTERY_3V3. The fourth end of the contact in the magnetic latching relay K1 (i.e., pin 2 of the magnetic latching relay K1) is electrically connected to the power supply terminal of the main control unit to output the power signal +3V3.

[0061] In Figure 5In it, the first end of the coil in the magnetic latching relay K1 (i.e., pin 1 of the magnetic latching relay K1) is electrically connected to the first end of the voltage drop resistor R10 and the gate of the PMOS transistor Q2 through the resistor R12. The drain of the PMOS transistor Q2 is electrically connected to the drain of the NMOS transistor Q5 and the second end of the coil in the magnetic latching relay K1 (i.e., pin 8 of the magnetic latching relay K1). The drain of the PMOS transistor Q2 is also electrically connected to the gate of the PMOS transistor Q3 and the first end of the voltage drop resistor R8 through the resistor R11. The drain of the PMOS transistor Q3 is electrically connected to the drain of the NMOS transistor Q4. The second end of the voltage drop resistor R8, the source of the PMOS transistor Q3, the voltage drop resistor R10, and the source of the PMOS transistor Q2 are respectively electrically connected to the output end of the energy storage power supply processing unit to access the power signal BATTERY_3V3. The gate of the NMOS transistor Q4 is electrically connected to the first output end of the main control unit through the resistor R13 and the resistor R15 to access the drive signal PB1. The gate of the NMOS transistor Q5 is electrically connected to the second output end of the main control unit through the resistor R14 and the resistor R16 to access the drive signal PB2.

[0062] Among them, the PMOS transistor Q2, the PMOS transistor Q3, the NMOS transistor Q4, and the NMOS transistor Q5 are in the off state by default. When the drive signal PB1 output by the first output end of the main control unit is at a high level and the drive signal PB2 output by the second output end of the main control unit is at a low level, the NMOS transistor Q4 conducts, there is current on the voltage drop resistor R10, the PMOS transistor Q2 conducts, and there is a current flowing from pin 8 to pin 1 on the coil in the magnetic latching relay K1. The contact in the magnetic latching relay K1 is attracted, and pin 3 and pin 2 of the magnetic latching relay K1 are connected and pin 6 and pin 5 are disconnected. The power signal BATTERY_3V3 is conducted to the power signal +3V3, and 3.3V is output to the main control unit. At this time, the energy storage unit supplies power. When the drive signal PB1 output by the first output end of the main control unit is at a low level and the drive signal PB2 output by the second output end of the main control unit is at a high level, the NMOS transistor Q5 conducts, there is current on the voltage drop resistor R8, the PMOS transistor Q3 conducts, and there is a current flowing from pin 1 to pin 8 on the coil in the magnetic latching relay K1. The contact in the magnetic latching relay K1 is repelled, and pin 3 and pin 2 of the magnetic latching relay K1 are disconnected and pin 6 and pin 5 are connected. The power signal L1 is conducted to the power signal HV, and 3.3V is output to the main control unit after passing through the subsequent step-down unit. At this time, the mains power supplies power.

[0063] Among them, the magnetic latching relay K1 is a pure physical isolation device and does not generate leakage current after disconnection. In other embodiments, other types of electromagnetic switches can also be used.

[0064] Among them, when the magnetic latching relay K1 is used as the core of the switch control, it only needs to provide a short-time driving current at the moment of disconnection or conduction, and no driving current is required at other times, thereby maximizing the reduction of power consumption.

[0065] It should be noted that, since a magnetic latching relay K1 is used, it can maintain the last working state when there is no drive. Therefore, when the mains does not output power, the main control unit can switch to the mains power supply mode and enter the off-machine state, thereby further saving power consumption. Specifically, when the mains does not input the corresponding alternating current, the circuit breaker system does not need to work, so there is no need for the energy storage unit to supply power, thereby avoiding the waste of power in the energy storage unit. Therefore, in this embodiment, when the mains is powered off, the circuit corresponding to the mains power supply is turned on and the circuit corresponding to the energy storage power supply is disconnected, thereby stopping the power consumption of the energy storage unit, and also ensuring that the main control unit can be started based on the mains power supply when powered on next time.

[0066] In other embodiments, the MOS tube in the H-bridge driving circuit may also be replaced by a triode.

[0067] like Figure 6 As shown, in one embodiment, the rectifying unit includes a varistor RV1, a fuse resistor FR1 and a rectifying diode D3.

[0068] exist Figure 6 In the embodiment, the varistor RV1 includes a first end electrically connected to the first end of the fuse resistor FR1 and the live wire L corresponding to the mains power, and a second end electrically connected to the neutral wire N corresponding to the mains power and grounded.

[0069] exist Figure 6 In the embodiment, the rectifier diode D3 includes an anode electrically connected to the second end of the fuse resistor FR1 and a cathode electrically connected to the input end of the step-down unit to output the power signal L1.

[0070] Among them, the varistor RV1 is used for surge protection, and the fuse resistor FR1 is used for overcurrent protection.

[0071] like Figure 7 As shown, in one embodiment, the energy storage power supply processing unit includes a bidirectional TVS tube D5 and an anti-reverse diode D4.

[0072] exist Figure 7 In the embodiment, the bidirectional TVS tube D5 includes a first end electrically connected to the anode of the anti-reverse diode D4 and the positive electrode BAT+ of the energy storage unit respectively, and a second end electrically connected to the negative electrode BAT- of the energy storage unit and grounded.

[0073] Among them, the bidirectional TVS tube D5 is used for voltage clamping to keep the voltage of the output power supply stable. Since the buck units in the energy storage power supply processing unit and the mains power supply processing unit are both electrically connected to the power supply terminal of the main control unit, an anti-reverse diode D4 needs to be set to prevent the power supply output by the buck unit from flowing back to the energy storage unit, so as to protect the energy storage unit.

[0074] As Figure 8 shown, in one embodiment, the energy storage unit includes a battery BAT and a micro switch SW1.

[0075] In Figure 8 it, the battery BAT includes a positive electrode electrically connected to the power supply terminal of the main control unit and a negative electrode electrically connected to the first end of the micro switch SW1.

[0076] In Figure 8 it, the micro switch SW1 further includes a second end electrically connected to the neutral line N corresponding to the mains power supply and grounded.

[0077] Among them, the battery BAT can be a lithium thionyl chloride battery.

[0078] Among them, the micro switch SW1 is used to be triggered and turned on due to the acting force of the battery BAT after the battery BAT is installed. Since the negative electrode of the battery BAT needs to be grounded, and the grounding terminal is electrically connected to the neutral line N of the mains power supply, it is easy to cause an electric shock risk when replacing the battery BAT. Therefore, in this embodiment, for this situation, a micro switch SW1 is set. When replacing the battery BAT, since the micro switch SW1 needs to be triggered and turned on based on the acting force of the battery BAT, the micro switch SW1 will be disconnected without being triggered after the battery BAT is taken out, so that the operator cannot be electrically connected to the neutral line N after the battery BAT is taken out, completely eliminating the electric shock risk.

[0079] Specifically, as Figure 9 shown, the battery BAT is movably connected to the micro switch SW1 through a spring S. After the battery BAT is installed, the micro switch SW1 is triggered and turned on due to the extrusion of the spring S.

[0080] In a second aspect, as Figure 1 shown, in one embodiment, the present invention provides a circuit breaker control device, including the power supply circuit of the circuit breaker control device in any of the above embodiments.

[0081] With the above circuit breaker control device, a channel switching unit is set to simultaneously control the on / off of the mains power supply and the energy storage unit power supply; when the line between the mains power and the main control unit is conducted, the line between the energy storage unit and the main control unit is disconnected; conversely, when the line between the energy storage unit and the main control unit is conducted, the line between the mains power and the main control unit is disconnected; thus achieving the purpose of only one power supply mode operating at the same time, without increasing the power consumption of the energy storage unit or adding additional billing to the electricity meter.

[0082] In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the detailed descriptions of other embodiments above, and they will not be elaborated here.

[0083] The power supply circuit and the circuit breaker control device of a circuit breaker control device provided by the present utility model have been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those skilled in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

[0084] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

Claims

1. A power supply circuit of a circuit breaker control device, characterized in that, It includes a channel switching unit and an energy storage unit; The channel switching unit includes a first input terminal for accessing the commercial power supply, a second input terminal electrically connected to the output terminal of the energy storage unit, an output terminal for electrically connecting to the power supply terminal of the main control unit, and a driving terminal electrically connected to the output terminal of the main control unit; The channel switching unit is used to control the conduction of the line between the commercial power supply and the power supply terminal of the main control unit or control the conduction of the line between the output terminal of the energy storage unit and the power supply terminal of the main control unit under the drive of the main control unit, so that the main control unit can control the circuit breaker after power-on.

2. The power supply circuit of the circuit breaker control device according to claim 1, characterized in that, The power supply circuit of the circuit breaker control device further includes a commercial power supply processing unit and an energy storage power supply processing unit; The commercial power supply processing unit is connected in series between the commercial power supply and the power supply terminal of the main control unit, and the energy storage power supply processing unit is connected in series between the energy storage unit and the power supply terminal of the main control unit.

3. The power supply circuit of the circuit breaker control device according to claim 2, characterized in that The commercial power supply processing unit includes a rectifying unit and a step-down unit; The rectifying unit includes an input terminal for accessing the commercial power supply and an output terminal electrically connected to the input terminal of the step-down unit, and the step-down unit further includes an output terminal electrically connected to the power supply terminal of the main control unit.

4. The power supply circuit of the circuit breaker control device according to claim 3, characterized in that, The rectifying unit includes an output terminal electrically connected to the input terminal of the step-down unit through the first input terminal and the first output terminal of the channel switching unit. The channel switching unit further includes a second input terminal electrically connected to the output terminal of the energy storage power supply processing unit and a second output terminal electrically connected to the power supply terminal of the main control unit; The channel switching unit is used to control the conduction of the line between the output terminal of the rectifying unit and the input terminal of the step-down unit or control the conduction of the line between the output terminal of the energy storage power supply processing unit and the power supply terminal of the main control unit under the drive of the main control unit.

5. The power supply circuit of the circuit breaker control device according to claim 4, characterized in that, The channel switching unit includes an electromagnetic switch and an H-bridge drive circuit; The contact in the electromagnetic switch includes a first end electrically connected to the output terminal of the rectifying unit, a second end electrically connected to the input terminal of the step-down unit, a third end electrically connected to the output terminal of the energy storage power supply processing unit, and a fourth end electrically connected to the power supply terminal of the main control unit; The coil in the electromagnetic switch includes a first end electrically connected to the first output terminal of the H-bridge drive circuit and a second end electrically connected to the second output terminal of the H-bridge drive circuit; The H-bridge drive circuit further includes a first driving terminal electrically connected to the first output terminal of the main control unit and a second driving terminal electrically connected to the second output terminal of the main control unit.

6. The power supply circuit of the circuit breaker control device according to claim 5, characterized in that, The electromagnetic switch includes a magnetic latching relay.

7. The power supply circuit of the circuit breaker control device according to claim 3, characterized in that, The rectifying unit includes a varistor, a fuse resistor, and a rectifying diode; The varistor includes a first end respectively electrically connected to the first end of the fuse resistor and the live wire corresponding to the commercial power supply, and a second end electrically connected to the neutral wire corresponding to the commercial power supply and grounded; The rectifying diode includes an anode electrically connected to the second end of the fuse resistor and a cathode electrically connected to the input terminal of the step-down unit.

8. The power supply circuit of the circuit breaker control device according to claim 2, characterized in that, The energy storage power supply processing unit includes a bidirectional TVS tube and an anti-reverse diode; The bidirectional TVS tube includes a first end electrically connected to the anode of the anti-reverse diode and the positive electrode of the energy storage unit respectively, and a second end connected to the negative electrode of the energy storage unit and grounded.

9. The power supply circuit of the circuit breaker control device according to claim 1, characterized in that The energy storage unit includes a battery and a microswitch; The battery includes a positive electrode electrically connected to the power supply terminal of the main control unit and a negative electrode electrically connected to the first end of the microswitch; The microswitch further includes a second end electrically connected to the neutral wire corresponding to the mains electricity and grounded; The microswitch is used to be triggered and turned on due to the acting force of the battery after the battery is installed.

10. A circuit breaker control device, characterized in that, A power supply circuit including a main control unit and the circuit breaker control device according to any one of claims 1 to 9.

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