Intelligent circuit breaker, circuit breaker control method and storage medium

Abstract

The present invention provides an intelligent circuit breaker, a circuit breaker control method and a storage medium. In the intelligent circuit breaker of the embodiment of the present application, the power supply unit adopts multiple power supply circuits connected in parallel, and the working voltage ranges of the multiple power supply circuits are different; the power supply unit uses the power supply circuit whose input voltage is within the working voltage range of the power supply circuit as the target power supply circuit to supply power to the power-consuming unit, and the power supply circuits working in different voltage ranges are all small in size. Compared with a single power supply compatible with a wide range of input voltages, the overall volume of the power supply unit is also small, and the cost is also low.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and in particular to an intelligent circuit breaker, a circuit breaker control method and a storage medium. Background Art

[0002] In recent years, miniature circuit breakers with functions such as communication, remote control, and reclosing have been continuously launched. At the same time, some products have residual current protection functions. Intelligent miniature circuit breakers usually need to work normally within a wider input voltage range, which is 50~277V. Ordinary miniature circuit breakers have relatively simple circuits and are compatible with a wide input voltage range. However, intelligent miniature circuit breakers require microprocessors, and the input voltage needs to be converted into a suitable voltage for the microprocessor. The power supply part in the intelligent miniature circuit breaker is responsible for voltage conversion.

[0003] Generally, power supplies compatible with a wide range of input voltages are larger and more expensive than those with a narrow range of input voltages. The reason is that the input capacitance of the power supply needs to be increased to be compatible with low voltages, and the withstand voltage of the capacitor needs to be increased to be compatible with high voltages; the volume of the magnetic device (inductor, transformer) needs to be increased to be compatible with the large current that needs to be borne at low voltages; and the controller needs to be able to provide an output with a wide range of modulated duty cycles. For example, a single-voltage power supply (220V+ / -15%) can reduce the input capacitance by half compared to a full-voltage power supply (90~277V), and the cost is almost half, and the volume of the magnetic material is basically the same. If the power supply of the intelligent miniature circuit breaker is to meet the wide voltage range, a larger and more expensive power supply is required, and the space limitation of the intelligent miniature circuit breaker itself cannot accommodate a large power supply. Therefore, how to make the intelligent miniature circuit breaker compatible with a wide range of input voltages has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide an intelligent circuit breaker compatible with a wide range of input voltages.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The embodiment of the present application provides an intelligent circuit breaker, including a power supply unit and a power consumption unit;

[0007] The input end of the power supply unit is connected to an external power source to obtain power, and the output end of the power supply unit is connected to a power consumption unit to supply power to the power consumption unit;

[0008] The power supply unit includes multiple power supply circuits connected in parallel, wherein the operating voltage ranges of the multiple power supply circuits are different; the power supply unit uses the power supply circuit whose input voltage is within the operating voltage range of the power supply circuit as the target power supply circuit to supply power to the power-consuming unit.

[0009] Preferably, the power supply unit obtains an input voltage of an external power supply, and a power supply circuit among the multiple power supply circuits that can operate under the input voltage is a target power supply circuit.

[0010] Preferably, the power consumption unit includes a controller and a sampling circuit;

[0011] The input end of the sampling circuit is connected to the external power supply, and the output end of the sampling circuit is connected to the controller, for collecting the input voltage of the external power supply and providing the input voltage to the controller;

[0012] The controller is connected to the power supply unit and the sampling circuit, and is used to receive the input voltage of the external power supply sent by the sampling circuit, select a target power supply circuit from multiple power supply circuits according to the input voltage, and when the input voltage is within the operating voltage range of a certain power supply circuit, determine the power supply circuit as the target power supply circuit, and control the target power supply circuit to supply power to the power consumption unit.

[0013] Preferably, the operating voltage intervals of at least two power supply circuits among the multiple power supply circuits partially overlap at interval boundaries.

[0014] Preferably, the power supply unit further comprises a first voltage conversion circuit, a first energy storage circuit and a second energy storage circuit;

[0015] The input end of the first voltage conversion circuit is connected to an external power source to convert the current of the external power source into the required current;

[0016] The input end of the first energy storage circuit is connected to the output end of the first voltage conversion circuit, and the output end of the first energy storage circuit is connected to a plurality of power supply circuits for energy storage;

[0017] The input end of the second energy storage circuit is connected to the multiple power supply circuits, and the output end of the second energy storage circuit is connected to the power consumption unit, so as to maintain output stability when the load power changes.

[0018] Preferably, the power supply unit further comprises a second voltage conversion circuit;

[0019] The input end of the second voltage conversion circuit is connected to the output end of the second energy storage circuit, and the output end of the second voltage conversion circuit is connected to the input end of the power consumption unit, so as to reduce the ripple of the output voltage.

[0020] Preferably, the second voltage conversion circuit includes a DC-DC conversion circuit and an LDO circuit, and the DC-DC conversion circuit and the LDO circuit are connected; the first voltage conversion circuit is any one of a bridge rectifier circuit, an AC-DC conversion circuit, a DC-DC conversion circuit and a PFC conversion circuit.

[0021] Preferably, each power supply circuit is any one of a flyback circuit, a buck circuit, a resonant circuit, a linear circuit and a boost circuit.

[0022] Preferably, the power consumption unit further includes a communication circuit, a leakage detection circuit and an opening and closing circuit;

[0023] The communication circuit, leakage detection circuit and opening and closing circuit are connected to a power supply unit, which supplies power to the communication circuit, leakage detection circuit and opening and closing circuit; the communication circuit, leakage detection circuit and opening and closing circuit are also connected to a controller, which receive control signals from the controller and perform corresponding operations.

[0024] An embodiment of the present application provides a circuit breaker control method, wherein the circuit breaker includes a power supply unit and a power consumption unit, wherein the power consumption unit includes a controller and a sampling circuit, and the method includes:

[0025] receiving an input voltage of an external power supply sent by a sampling circuit;

[0026] According to the input voltage, a power circuit adapted to the input voltage is selected as a target power circuit from a pre-established mapping relationship table of operating voltage intervals and power circuits;

[0027] Sending a control signal to the power supply unit to control the target power supply circuit to supply power to the power consumption unit;

[0028] The power supply unit includes a plurality of power supply circuits connected in parallel, the operating voltage ranges of the plurality of power supply circuits are different, and the target power supply circuit is the power supply circuit whose input voltage is within the operating voltage range of the power supply circuit.

[0029] An embodiment of the present application also provides a computer-readable storage medium storing a computer program. When the computer program is executed by one or more processors, the one or more processors are caused to execute each step in the above method.

[0030] In the intelligent circuit breaker of the embodiment of the present application, the power supply unit adopts multiple power supply circuits connected in parallel, and the operating voltage ranges of the multiple power supply circuits are different; the power supply unit supplies power to the power-consuming unit through the target power supply circuit corresponding to the operating voltage range to which the input voltage belongs. The volume of the power supply circuits operating in different voltage ranges is relatively small. Compared with a single power supply compatible with a wide range of input voltages, the overall volume of the power supply unit is also smaller and the cost is also lower.

[0031] In the intelligent circuit breaker of the embodiment of the present application, the sampling circuit collects the input voltage of the external power supply and provides the input voltage to the controller. The controller receives the input voltage of the external power supply sent by the sampling circuit, selects a target power circuit from multiple power circuits according to the input voltage, and controls the target power circuit to supply power to the power consumption unit. The present application adopts power supply circuits operating in different voltage ranges. The controller automatically switches to the corresponding target power circuit according to the current input voltage to supply power to the power consumption unit. The product is more intelligent and achieves the purpose of precise power supply.

[0032] In addition, multiple power supply circuits share the energy storage circuit, further reducing the overall volume and cost.

[0033] The operating voltage intervals of any two power supply circuits among the multiple power supply circuits in the embodiment of the present application partially overlap at the interval boundary, which prevents the occurrence of blank space for switching multiple power supplies. The two power supply circuits can supply power simultaneously in the overlapping part of the input voltage, thereby improving the power supply stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is the overall structural block diagram of the intelligent circuit breaker of the present invention;

[0035] Figure 2 It is a schematic diagram of the input voltage operating range of multiple power supply circuits of the intelligent circuit breaker of the present invention;

[0036] Figure 3 It is a schematic diagram of the internal structure of the power supply unit of the present invention;

[0037] Figure 4 It is a schematic diagram of a shared energy storage circuit for multiple power supply circuits of the present invention;

[0038] Figure 5 is a schematic diagram of a specific embodiment of the intelligent circuit breaker of the present invention;

[0039] Figure 6 It is a flow chart of the circuit breaker control method of the present invention. DETAILED DESCRIPTION

[0040] The following is combined with Figures 1 to 6 The given embodiments further illustrate the specific implementation of the intelligent circuit breaker of the present invention. The intelligent circuit breaker of the present invention is not limited to the description of the following embodiments.

[0041] like Figure 1-4As shown, the intelligent circuit breaker of the present invention includes a power supply unit and a power consumption unit; the input end of the power supply unit is connected to an external power supply to draw power, and the output end of the power supply unit is connected to the power consumption unit to supply power to the power consumption unit; the power supply unit includes a plurality of power supply circuits connected in parallel, wherein the operating voltage ranges of the plurality of power supply circuits are different; the power supply unit uses the power supply circuit whose input voltage is within the operating voltage range of the power supply circuit as the target power supply circuit to supply power to the power consumption unit. In the intelligent circuit breaker of the embodiment of the present application, the power supply unit adopts a plurality of power supply circuits connected in parallel, and the operating voltage ranges of the plurality of power supply circuits are different; the power supply unit supplies power to the power consumption unit through the target power supply circuit corresponding to the operating voltage range to which the input voltage belongs, and the volume of the power supply circuits operating in different voltage ranges is relatively small. Compared with a single power supply compatible with a wide range of input voltages, the overall volume of the power supply unit is also relatively small, and the cost is also relatively low.

[0042] Embodiment 1 of the power supply method: the power supply unit obtains the input voltage of the external power supply, and the power supply circuit that can work under the input voltage among the multiple power supply circuits is the target power supply circuit, which supplies power to the power consumption unit. The power supply unit adaptively adjusts the target power supply circuit according to the input voltage to supply power to the power consumption unit. The input voltage is in or close to the working voltage interval of a certain power supply circuit, and the power supply circuit can work and provide sufficient energy and suitable voltage to the power consumption unit. It adaptively becomes the target power supply circuit, and other power supply circuits other than the target power supply circuit cannot work under the input voltage, and cannot provide sufficient energy and suitable voltage to the power consumption unit. Therefore, other power supply circuits other than the target power supply circuit cannot supply power to other power consumption units. In addition, when the input voltage is close to the working voltage interval of a certain power supply circuit, the power supply circuit can also work, but it cannot work efficiently. The power supply circuit can also supply power to the power consumption unit, so it can also be used as the target power supply circuit.

[0043] In the second embodiment of the power supply mode, the intelligent circuit breaker of the present invention, the power consumption unit includes a controller and a sampling circuit. The input end of the sampling circuit is connected to the external power supply, and the output end of the sampling circuit is connected to the controller, which is used to collect the input voltage of the external power supply and provide the input voltage to the controller; the controller is connected to the power supply unit and the sampling circuit, and is used to receive the input voltage of the external power supply sent by the sampling circuit, and select a target power supply circuit from multiple power supply circuits according to the input voltage. When the input voltage is within the working voltage range of a certain power supply circuit, the power supply circuit is determined as the target power supply circuit, and the target power supply circuit is controlled to supply power to the power consumption unit. In the intelligent circuit breaker of the embodiment of the present application, the sampling circuit collects the input voltage of the external power supply and provides the input voltage to the controller. The controller receives the input voltage of the external power supply sent by the sampling circuit, compares the input voltage with the working voltage range of each power circuit, and when the input voltage is within the working voltage range of a certain power circuit, the power circuit is the target power circuit, and the target power circuit is selected from multiple power circuits, and the target power circuit is controlled to supply power to the power consumption unit; the present application adopts power supply circuits operating in different voltage ranges, and the controller automatically switches to the corresponding target power circuit according to the current input voltage to supply power to the power consumption unit, so that the product is more intelligent and achieves the purpose of precise power supply; and the power supply circuits operating in different voltage ranges are smaller in size. Compared with a single power supply compatible with a wide range of input voltages, the overall size of the power supply unit is also smaller and the cost is also lower.

[0044] In combination with the above embodiments, in a special case, when the intelligent circuit breaker is powered on, the power unit controller cannot work, and the power supply method of the power supply method embodiment 1 is used to power the power unit. At this time, there may be a situation where the power circuit that cannot work efficiently supplies power to the power unit; when the controller is powered on, the power supply method of the power supply method embodiment 2 is used to supply power, and the controller controls the power circuit that cannot work efficiently to stop working. The controller can be a single-chip computer, or a microcontroller chip, or a hardware circuit, such as a hardware circuit with a comparator. The controller can use the original microcontroller chip of the intelligent circuit breaker, or an additional controller.

[0045] It should be noted that the target power circuit can be one or more. When the operating voltage intervals of multiple power units are different but overlapped, and the input voltage of the external power supply is within the operating voltage intervals of multiple power units, the target power circuits are multiple, and the power supply unit can be powered by multiple target power circuits at the same time, or one of the target power circuits can be selected for power supply. The external power supply in the embodiment of the present application can be an input of various voltages such as single-phase, three-phase or DC, and currents of different frequencies. The power unit may also include a communication circuit, a leakage detection circuit, a split-and-close circuit, and other modules or circuits required by a circuit breaker. Optionally, the communication circuit, the leakage detection circuit, and the split-and-close circuit are connected to the power supply unit, and the power supply unit supplies power to the communication circuit, the leakage detection circuit, and the split-and-close circuit; the communication circuit, the leakage detection circuit, and the split-and-close circuit are also connected to the controller, and the communication circuit, the leakage detection circuit, and the split-and-close circuit receive the control signal of the controller and perform corresponding operations.

[0046] In an optional embodiment, the power supply unit includes two power supply circuits as an example, wherein the first power supply circuit operates in a high voltage input range and the second power supply circuit operates in a low voltage range. When the input voltage is high, although the second power supply circuit enters an abnormal state (usually overcurrent protection) and cannot output a suitable voltage to the power consumption unit, the first power supply circuit operates normally and provides a suitable voltage to the power consumption unit. When the input voltage begins to drop to a low voltage range, it exceeds the normal operating range of the first power supply circuit. At this time, although the first power supply circuit cannot work, the second power supply circuit will enter a normal operating state, and the power of the power consumption unit is provided by the second power supply circuit. The two power supply circuits are output in parallel and can be switched freely. If it is a multi-channel power supply, it is similar, except that the input voltage range is more segmented. Each power supply can be a single voltage output or a multi-voltage output to meet the power supply requirements of the power consumption unit.

[0047] In order to ensure that there is no blank space in the input voltage range for switching between multiple power supplies, the design voltage ranges of multiple power supplies need to have a certain overlap. Figure 2 As shown, the operating voltage intervals of any two power supply circuits among the multiple power supply circuits in the embodiment of the present application partially overlap at the interval boundary, preventing the occurrence of blank space for switching multiple power supplies. The two power supply circuits can supply power simultaneously in the overlapping part of the input voltage, thereby improving the power supply stability.

[0048] like Figure 3As shown, the power supply unit of the embodiment of the present application also includes a first voltage conversion circuit, a first energy storage circuit and a second energy storage circuit; the input end of the first voltage conversion circuit is connected to an external power supply to convert the current of the external power supply into the required current; the input end of the first energy storage circuit is connected to the output end of the first voltage conversion circuit, and the output end of the first energy storage circuit is connected to multiple power supply circuits for energy storage; the input end of the second energy storage circuit is connected to multiple power supply circuits, and the output end of the second energy storage circuit is connected to the power consumption unit to maintain output stability when the load power changes. Among them, the first voltage conversion circuit is any one of a bridge rectifier circuit, an AC-DC conversion circuit, a DC-DC conversion circuit and a PFC conversion circuit, which converts alternating current or direct current into the required direct current.

[0049] like Figure 3 As shown, specifically, the first energy storage circuit can be composed of one or more capacitors, batteries, supercapacitors and other energy storage elements, and its function is to maintain energy stability. The first energy storage circuit is connected to a plurality of power supply circuits connected in parallel, and each power supply circuit preferably shares the first energy storage circuit, but of course can also exclusively use the first energy storage circuit; each power supply circuit can be a flyback circuit, a buck circuit, a resonant circuit, a linear circuit, a boost circuit, etc., and each power supply output is connected in parallel, and each power supply circuit can output enough energy to the power consumption unit separately, and each power supply circuit has its own input voltage range, and each power supply circuit can be a single voltage output or a multi-voltage output.

[0050] In an alternative embodiment, Figure 4 It is a schematic diagram of multiple power circuits sharing a tank circuit, where the same voltage output by different power circuits is connected in parallel. The second tank circuit is connected after the power circuit, which can be composed of one or more capacitors, batteries, supercapacitors and other energy storage elements. Its function is to maintain output stability when the load has power changes. Each power circuit can preferably share the tank circuit, but of course it can also have its own tank circuit.

[0051] like Figure 4 As shown, the power supply unit of the present invention may also include a second voltage conversion circuit. The input end of the second voltage conversion circuit is connected to the output end of the second energy storage circuit, and the output end of the second voltage conversion circuit is connected to the input end of the power consumption unit, so as to reduce the ripple of the output voltage. Connected after the second energy storage circuit is the second voltage conversion circuit, which is an optional item and is usually composed of a DC-DC conversion circuit, an LDO circuit, etc., and is used for some special functions, such as reducing the ripple of the output voltage. The power consumption unit is connected after the second voltage conversion circuit to supply power to it. In another optional embodiment, the power supply unit is not provided with a second voltage conversion circuit, and the second energy storage circuit is directly connected to the power consumption unit.

[0052] Figure 5FIG. 1 is a schematic diagram of a specific embodiment of the intelligent circuit breaker of the present invention. Figure 5 As shown, the intelligent circuit breaker includes a power supply unit and a power consumption unit, and the power consumption unit includes a communication circuit 12, a controller 9, a sampling circuit 11 and a switch-on and switch-off circuit 10. The input end of the intelligent circuit breaker is connected to the power line 1, and the current line 1 can be input with various voltages such as single-phase, three-phase or DC and different frequency currents. The power supply unit 2 includes a flyback power supply circuit and a buck power supply circuit. The flyback power supply circuit and the buck power supply circuit are connected in parallel, wherein the input voltage range of the flyback power supply circuit is AC 50V~170V, and the input voltage range of the buck power supply circuit is 160V~277V, and the function is to supply power to other power consumption units at the output end. The controller 9 is a processor with logic or / and computing capabilities and contains storage capabilities, which is used to control the communication circuit 12, the switch-on and switch-off circuit 10 and the sampling circuit 11. The switch-on and switch-off unit 10 is used for opening and closing. The sampling circuit 11, which is composed of a sensor and a signal processing circuit, is used to detect parameters such as voltage, current, power, electricity and leakage of the power line. The communication circuit 12 can be wired or wireless communication, and is used to communicate with an external system. The basic principle of its operation is that when the power is turned on, when the voltage provided by the power line is lower than 160V, the step-down power supply circuit cannot provide enough energy and suitable voltage to the controller, communication circuit, opening and closing circuit and other power-consuming units, and the power consumption at this time is all provided by the flyback power supply circuit. When the power line voltage is between 160V and 170V, both power supply circuits can work at this time, and output power to the controller, communication circuit, opening and closing circuit and other power-consuming units at the same time. When the power line voltage exceeds 170V, the power supply of the controller, communication circuit, opening and closing circuit and other power-consuming units is completely provided by the step-down power supply circuit, and the flyback power supply circuit will no longer work. In this way, the flyback power supply and the step-down power supply can work in a more suitable state, and the controller, communication circuit, opening and closing circuit and other power-consuming units can not be disconnected.

[0053] Figure 6 FIG. 1 is a flow chart of the circuit breaker control method of the present invention. Figure 6 As shown, the circuit breaker control method includes:

[0054] S601: receiving an input voltage of an external power supply sent by a sampling circuit;

[0055] S602: According to the input voltage, a power circuit that matches the input voltage is selected as a target power circuit from a pre-established mapping relationship table of voltages, operating voltage intervals, and power circuits;

[0056] S603: Send a control signal to the power supply unit to control the target power supply circuit to supply power to the power consumption unit, wherein the power supply unit includes a plurality of power supply circuits connected in parallel, the plurality of power supply circuits have different operating voltage ranges, and the target power supply circuit is the power supply circuit whose input voltage is within the operating voltage range of the power supply circuit.

[0057] In this embodiment, the execution subject of the above method may be an intelligent miniature circuit breaker, wherein the internal structure of the intelligent miniature circuit breaker can refer to the description in the above device embodiment, and will not be repeated in this embodiment.

[0058] The controller receives the input voltage of the external power supply sent by the sampling circuit, and the intelligent miniature circuit breaker selects the power circuit that matches the input voltage as the target power circuit from the pre-established mapping relationship table of the working voltage range and the power circuit according to the input voltage. For example, the power circuit includes a buck power circuit and a flyback power circuit, the working voltage range of the buck power circuit is 160V to 277V, and the working voltage range of the flyback power circuit is 50V to 170V; when the input voltage is 60V, the controller selects the flyback power circuit that matches the input voltage according to the input voltage, and the controller sends a control signal to the power supply unit to control the flyback power circuit to supply power to the power unit. When the input voltage is 165V, the controller selects the flyback power circuit and the buck power circuit that match the input voltage according to the input voltage, and the controller sends a control signal to the power supply unit to control the flyback power circuit and the buck power circuit to supply power to the power unit.

[0059] Accordingly, the present application also provides a computer-readable storage medium storing a computer program, which can achieve Figure 6 The steps in the method embodiment shown may be executed by a computing platform.

[0060] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An intelligent circuit breaker, characterized in that: including a power supply unit and a power consumption unit; The input end of the power supply unit is connected to an external power source to obtain power, and the output end of the power supply unit is connected to a power consumption unit to supply power to the power consumption unit; The power supply unit includes a plurality of power supply circuits connected in parallel, wherein the operating voltage ranges of the plurality of power supply circuits are different; The power supply unit uses the power supply circuit whose input voltage is within the working voltage range of the power supply circuit as the target power supply circuit to supply power to the power consumption unit.

2. The intelligent circuit breaker according to claim 1, characterized in that: The power supply unit obtains an input voltage of an external power supply, and a power supply circuit that can operate under the input voltage among the multiple power supply circuits is a target power supply circuit.

3. The intelligent circuit breaker according to claim 1, characterized in that: The power consumption unit includes a controller and a sampling circuit; The input end of the sampling circuit is connected to the external power supply, and the output end of the sampling circuit is connected to the controller, for collecting the input voltage of the external power supply and providing the input voltage to the controller; The controller is connected to the power supply unit and the sampling circuit, and is used to receive the input voltage of the external power supply sent by the sampling circuit, select a target power supply circuit from multiple power supply circuits according to the input voltage, and when the input voltage is within the operating voltage range of a certain power supply circuit, determine the power supply circuit as the target power supply circuit, and control the target power supply circuit to supply power to the power consumption unit.

4. The intelligent circuit breaker according to claim 1, characterized in that: The operating voltage intervals of at least two power supply circuits among the multiple power supply circuits partially overlap at interval boundaries.

5. The intelligent circuit breaker according to claim 1, characterized in that: The power supply unit further includes a first voltage conversion circuit, a first energy storage circuit and a second energy storage circuit; The input end of the first voltage conversion circuit is connected to an external power source to convert the current of the external power source into the required current; The input end of the first energy storage circuit is connected to the output end of the first voltage conversion circuit, and the output end of the first energy storage circuit is connected to a plurality of power supply circuits for energy storage; The input end of the second energy storage circuit is connected to the multiple power supply circuits, and the output end of the second energy storage circuit is connected to the power consumption unit, so as to maintain output stability when the load power changes.

6. The intelligent circuit breaker according to claim 5, characterized in that: The power supply unit further includes a second voltage conversion circuit; The input end of the second voltage conversion circuit is connected to the output end of the second energy storage circuit, and the output end of the second voltage conversion circuit is connected to the input end of the power consumption unit, so as to reduce the ripple of the output voltage.

7. The intelligent circuit breaker according to claim 6, characterized in that: The second voltage conversion circuit includes a DC-DC conversion circuit and an LDO circuit, and the DC-DC conversion circuit and the LDO circuit are connected; the first voltage conversion circuit is any one of a bridge rectifier circuit, an AC-DC conversion circuit, a DC-DC conversion circuit and a PFC conversion circuit.

8. The intelligent circuit breaker according to claim 1, characterized in that: Each power supply circuit is any one of a flyback circuit, a buck circuit, a resonant circuit, a linear circuit and a boost circuit.

9. The intelligent circuit breaker according to claim 1, characterized in that: The power consumption unit also includes a communication circuit, a leakage detection circuit and an opening and closing circuit; The communication circuit, leakage detection circuit and opening and closing circuit are connected to a power supply unit, which supplies power to the communication circuit, leakage detection circuit and opening and closing circuit; the communication circuit, leakage detection circuit and opening and closing circuit are also connected to a controller, which receive control signals from the controller and perform corresponding operations.

10. A circuit breaker control method, characterized in that: The circuit breaker includes a power supply unit and a power consumption unit, wherein the power consumption unit includes a controller and a sampling circuit, and the method includes: receiving an input voltage of an external power supply sent by a sampling circuit; According to the input voltage, a power circuit adapted to the input voltage is selected as a target power circuit from a pre-established mapping relationship table of operating voltage intervals and power circuits; Sending a control signal to the power supply unit to control the target power supply circuit to supply power to the power consumption unit; The power supply unit includes a plurality of power supply circuits connected in parallel, the operating voltage ranges of the plurality of power supply circuits are different, and the target power supply circuit is the power supply circuit whose input voltage is within the operating voltage range of the power supply circuit.

11. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by one or more processors, the one or more processors are caused to execute the steps in the circuit breaker control method according to claim 10 .

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