Dual power supply circuit, method and circuit breaker

Abstract

Embodiments of the present application provide a dual power supply circuit, a method and a circuit breaker. The dual power supply circuit comprises a shunt, a first conductive part and a second conductive part. The first end of the shunt is connected with a movable contact, and the second end of the shunt is connected with a first position of a printed circuit board (PCB). The first end of the first conductive part is connected with a second position of the PCB, and the second end of the first conductive part is connected with a stationary contact. The first end of the second conductive part is connected with a conductive plate, and the second end of the second conductive part is connected with a third position of the PCB. When a main power supply is powered, the main power supply, the shunt, the PCB, the second conductive part and the conductive plate form a first power supply loop. When an auxiliary power supply is powered, the auxiliary power supply, the first conductive part, the PCB, the second conductive part and the conductive plate form a second power supply loop. The dual power supply circuit provided by the embodiments of the present application can still work normally when the power supply is abnormal.

Description

Technical Field

[0001] This application relates to the field of electrical technology, and in particular to a dual power supply circuit, method, and circuit breaker. Background Technology

[0002] Electrical equipment permeates all aspects of life and industry, playing a crucial role in technological advancement and the development of living and industrial standards. Typically, electrical equipment functions through circuits driven by a power source; therefore, ensuring the proper functioning of electrical equipment requires ensuring the proper functioning of the circuitry.

[0003] In some situations, such as when the current in a circuit is high, the circuit load may be too high, leading to a short circuit and potentially damaging electrical equipment. To prevent this, circuit breakers are typically installed in the circuit for load protection. Circuit breakers can promptly disconnect the circuit when the current exceeds its rated value, preventing damage to the circuit or electrical equipment.

[0004] Therefore, circuit breakers play a crucial role in the normal operation of electrical equipment and circuits. However, it is important to note that circuit breakers themselves require a power supply to function properly, and their power supply can be affected during overcurrent events. Thus, ensuring that circuit breakers continue to operate normally under abnormal power supply conditions is a pressing issue that needs to be addressed. Summary of the Invention

[0005] In view of the above problems, the embodiments of this application provide a dual power supply circuit, method and circuit breaker, which can ensure that the circuit breaker can still work normally when the power supply is abnormal.

[0006] In a first aspect, embodiments of this application provide a dual power supply circuit, including:

[0007] The shunt has its first end connected to the moving contact and its second end connected to the first position of the printed circuit board (PCB).

[0008] The first conductive component has a first end connected to the second position of the PCB and a second end connected to the stationary contact.

[0009] The second conductive component has its first end connected to the conductive plate and its second end connected to the third position on the PCB.

[0010] When the main power supply is in operation, the main power supply, shunt, PCB, second conductive component and conductive plate form the first power supply circuit;

[0011] When the auxiliary power supply is in operation, the auxiliary power supply, the first conductive component, the PCB, the second conductive component, and the conductive plate form a second power supply circuit.

[0012] In one possible implementation, when the main power supply is on, the first conductive element is used to detect a first voltage signal on the PCB at a second location.

[0013] In one possible implementation, when the auxiliary power supply is on, the shunt is used to detect a second voltage signal on the PCB at the first location.

[0014] In one possible implementation, the first conductive element is a torsion spring, with a first torsion arm connected to the second position and a second torsion arm connected to the stationary contact; or...

[0015] The first conductive element is a lead wire, the first end of which is connected to the second position, and the second end of which is connected to the stationary contact.

[0016] In one possible implementation, the second conductive element is a torsion spring, with its first torsion arm connected to the conductive plate and its second torsion arm connected to a third position; or...

[0017] The second conductive element is a lead wire, the first end of which is connected to the conductive plate, and the second end of which is connected to the third position.

[0018] Secondly, embodiments of this application provide a dual power supply method, applied to a dual power supply circuit as described in any of the first aspects, the method comprising:

[0019] Obtain the first voltage signal of the first power supply circuit;

[0020] When the voltage value corresponding to the first voltage signal is 0, the circuit breaker is determined to be in the open state;

[0021] When the voltage value corresponding to the first voltage signal is not 0, the circuit breaker is determined to be in the closed state.

[0022] In one possible implementation, after obtaining the first voltage signal of the first power supply circuit, the method further includes:

[0023] When the voltage value or voltage change value corresponding to the first voltage signal is within an abnormal range, it is determined that the main power supply has failed, and the power supply is switched to the second power supply circuit to supply power to the PCB.

[0024] In one possible implementation, after switching to the second power supply circuit to supply power to the printed circuit board (PCB), the method further includes:

[0025] Obtain the second voltage signal of the second power supply circuit;

[0026] The current value in the second power supply circuit is determined based on the second voltage signal;

[0027] The power consumption of the circuit breaker is determined based on the current value; and / or, the circuit breaker is overloaded when the current value exceeds a preset threshold.

[0028] Thirdly, embodiments of this application provide a circuit breaker, including: a dual power supply circuit of any one of the first aspects described above, wherein when the dual power supply circuit is in operation, the dual power supply method of any one of the second aspects is executed.

[0029] In one possible implementation, the circuit breaker is a plug-in circuit breaker.

[0030] The dual-power supply circuit, method, and circuit breaker provided in this application embodiment, by setting three positions on the PCB—the first position connected to the main power supply, the second position connected to the auxiliary power supply, and the third position connected to both the main and auxiliary power supplies—can switch to another power supply when the current power supply fails. This ensures the circuit breaker is always powered by two power supply circuits, unaffected by power outages or insufficient voltage, guaranteeing normal operation even in cases of power supply abnormalities. Furthermore, the circuit breaker's open / closed status can be determined by monitoring the voltage signal on the PCB when powered by either the main or auxiliary power supply.

[0031] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a cross-sectional schematic diagram of a circuit breaker provided in an embodiment of this application.

[0034] Figure 2 This is a partial structural schematic diagram of a circuit breaker provided in an embodiment of this application.

[0035] Figure 3 This is the corresponding embodiment provided in this application. Figure 2 A schematic diagram of the local structure from another angle.

[0036] Figure 4 This is a flowchart illustrating a dual power supply method provided in an embodiment of this application.

[0037] Figure label:

[0038] 1. Circuit breaker; 10. Shunt; 101. First terminal of the shunt; 102. Second terminal of the shunt;

[0039] 103. The third terminal of the splitter; 104. The fourth terminal of the splitter;

[0040] 20. First conductive element; 201. First end of the first conductive element; 202. Second end of the first conductive element;

[0041] 30. Second conductive element; 301. First end of second conductive element; 302. Second end of second conductive element;

[0042] 40. Moving contact; 41. Stationary contact; 42. Conductive plate; 43. Fine lead wire; 44. PCB;

[0043] 441. First position; 442. Second position; 443. Third position; 444. Fourth position;

[0044] 45. Torsion spring; 451. First torsion arm; 452. Second torsion arm; 46. Conductive needle; 47. Static arc angle;

[0045] 2. Positive busbar terminal; 3. Negative busbar terminal. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0048] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0049] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0050] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0051] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0052] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, "connection" or "linkage" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. In circuit structures, "connection" or "linkage" can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is connected; it can also refer to the internal connection of two components. Signal connection can refer not only to signal connection through a circuit but also to signal connection through a media, such as radio waves. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0053] Electrical equipment permeates all aspects of life and industry, playing a crucial role in technological advancement and the development of living and industrial standards. The circuits within electrical equipment, driven by a power source, control the operation of various components to achieve different functions. Therefore, to ensure the normal operation of electrical equipment, it is essential to ensure that the circuits controlling its operation are functioning correctly.

[0054] In some situations, such as when the current in a circuit is high, the circuit load may be too high, leading to a short circuit and potentially damaging electrical equipment. To prevent this, circuit breakers are typically installed in the circuit for load protection. Circuit breakers can promptly disconnect the circuit when the current exceeds its rated value, preventing damage to the circuit or electrical equipment. Therefore, circuit breakers are of great importance for the normal operation of electrical equipment and circuits.

[0055] It is important to note that circuit breakers are also electrical devices, requiring a properly functioning circuit to operate correctly. Circuit breakers control the opening and closing mechanisms to disconnect or connect the circuit; therefore, a power supply is necessary for normal operation. However, in some situations, the power supply may fail, resulting in no power or insufficient voltage, affecting the circuit breaker's power supply and preventing it from functioning properly. Therefore, ensuring that circuit breakers continue to operate normally under abnormal power supply conditions is a pressing issue that needs to be addressed.

[0056] To address the aforementioned issues, this application provides a dual-power supply circuit, method, and circuit breaker that can ensure the circuit breaker continues to operate normally even when its power supply is abnormal.

[0057] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, different technical features in this application can be combined with each other.

[0058] The dual power supply circuit provided in this application embodiment can be used in circuit breaker 1. Figure 1 This is a cross-sectional schematic diagram of a circuit breaker 1 provided in an embodiment of this application. Figure 1As shown, the circuit in circuit breaker 1 is a dual-power supply circuit provided in this embodiment of the application, which may include a shunt 10, a first conductive element 20, and a second conductive element 30. The first end 101 of the shunt is connected to the moving contact 40, and the second end 102 of the shunt is connected to the first position 441 of the printed circuit board PCB 44. The first end 201 of the first conductive element is connected to the second position 442 of the PCB 44, and the second end 202 of the first conductive element is connected to the stationary contact 41. The first end 301 of the second conductive element is connected to the conductive plate 42, and the second end 302 of the second conductive element is connected to the third position 443 of the PCB 44. When the main power supply is used, the main power supply, shunt 10, PCB 44, second conductive element 30, and conductive plate 42 form a first power supply circuit. When the auxiliary power supply is used, the auxiliary power supply, first conductive element 20, PCB 44, second conductive element 30, and conductive plate 42 form a second power supply circuit.

[0059] Specifically, in combination Figure 1 The shunt 10 may include a manganese copper main body for current sampling and a pure copper part that is fitted with the manganese copper at both ends. The manganese copper main body and the pure copper part have the same thickness and width. After being fitted, they are fixed between the main power supply and the moving contact 40. The pure copper part at the first end is connected to the moving contact 40, and the pure copper part at the third end is connected to the first end of the main power supply. In addition, the manganese copper structure between the first end and the third end is provided with two thin leads 43. Either of the thin leads 43 can be selected as the second end 102 of the shunt and connected to the first position 441 of the PCB 44.

[0060] The first end 201 of the first conductive element is connected to the second position 442 of the PCB 44, and the second end 202 of the first conductive element is connected to the stationary contact 41. The first end 301 of the second conductive element is connected to the first end of the conductive plate 42, and the second end 302 of the second conductive element is connected to the third position 443 of the PCB 44. The second end of the conductive plate 42 is connected to the second end of the main power supply. Thus, the main power supply can form a first power supply circuit with the shunt 10, PCB 44, second conductive element 30, and conductive plate 42, and when the circuit breaker 1 is working, the main power supply supplies power to the PCB 44.

[0061] The first end of the auxiliary power supply is connected to the third end of the first conductive element 20, and the second end of the auxiliary power supply is connected to the first end of the conductive plate 42. Thus, the auxiliary power supply can form a second power supply circuit with the first conductive element 20, PCB44, second conductive element 30, and conductive plate 42. When the circuit breaker 1 is working, the auxiliary power supply supplies power to the PCB44.

[0062] Specifically, the main power supply and auxiliary power supply are the power supplies provided in the operating environment of circuit breaker 1. The main power supply can be a power supply provided by an industrial circuit, and the auxiliary power supply can be a battery. For example, the main power supply can be connected to the mains line via terminals to connect the second end of the conductive plate 42 and the third end 103 of the shunt to form a first power supply circuit. The auxiliary power supply can be connected to different lines of the main power supply via terminals to connect the first end of the conductive plate 42 and the third end of the first conductive element 20 to form a second power supply circuit.

[0063] like Figure 1 As shown, the conductive plate 42 can be a long plate extending from the first side of the circuit breaker 1 to the second side of the circuit breaker 1. The first side of the circuit breaker 1 can be the side connected to the main power supply, for example... Figure 1 On the right side, the second side of circuit breaker 1 can be the side connected to the auxiliary power supply, for example... Figure 1 On the left side of the image. It can be seen that the first end 301 of the second conductive element is always connected to the conductive plate 42. Therefore, whether powered by the main power supply or the auxiliary power supply, power is supplied to the third position 443 of the PCB 44 through the first end 301 of the second conductive element; that is, the third position 443 is always a power supply position. The first position 441 only supplies power to the PCB 44 when powered by the main power supply, and the second position 442 only supplies power to the PCB 44 when powered by the auxiliary power supply.

[0064] By setting three positions on PCB44, with the first position 441 connected to the main power supply, the second position 442 connected to the auxiliary power supply, and the third position 443 connected to both the main power supply and the auxiliary power supply, the circuit breaker 1 can be switched to another power supply when the current power supply fails. This ensures that the circuit breaker 1 is always powered through two power supply circuits, and can always work normally without being affected by power outages or insufficient voltage.

[0065] In circuit breaker 1, the transmission structure can be controlled by a handle or button to move the moving contact 40 closer to or further away from the stationary contact 41, thereby controlling the closing and opening states of the moving contact 40 and the stationary contact 41. It can be understood that when the moving contact 40 is closed to the stationary contact 41, circuit breaker 1 is in the closed state; when the moving contact 40 is open to the stationary contact 41, circuit breaker 1 is in the open state.

[0066] In some embodiments, when powered by the main power supply, the first conductive element 20 is used to detect a first voltage signal on the PCB44 at the second position 442.

[0067] Specifically, when the main power supply is in operation, the first position 441 and the third position 443 of PCB44 are used to receive current from the main power supply and transmit current to PCB44, thus completing the power supply. In the first power supply circuit, the first position 441 and the third position 443 are used to supply power to PCB44, while the second position 442 is connected to the stationary contact 41 through the first conductive element 20. When the stationary contact 41 and the moving contact 40 are closed, the second position 442, the stationary contact 41, the moving contact 40, the shunt 10, and PCB44 form a circuit, and a first voltage signal can be detected at the second position 442. Therefore, when the main power supply is in operation, if a non-zero first voltage signal is detected at the second position 442, it can be determined that the circuit breaker 1 is currently in the closed state. Conversely, when the stationary contact 41 is disconnected from the moving contact 40, there is an open circuit between the second position 442, the stationary contact 41, the moving contact 40, the shunt 10, and the PCB 44, and the first voltage signal is 0, which indicates that the circuit breaker 1 is currently in the open state.

[0068] In some embodiments, when the auxiliary power supply is in operation, the shunt 10 is used to detect a second voltage signal on the PCB 44 at a first position 441.

[0069] Specifically, when the auxiliary power supply is in operation, the second position 442 and the third position 443 of PCB44 are used to receive the current from the auxiliary power supply and transmit the current to PCB44 to complete the power supply. In addition, the other thin lead 43, which is not connected to the second position 442, is one of the two thin leads 43 located between the first end 101 and the third end of the shunt and is used as the fourth end 104 of the shunt to connect to the fourth position 444 of PCB44.

[0070] Therefore, in the second power supply circuit, the second position 442 and the third position 443 are used to supply power to the PCB44, while the first position 441 is connected to the moving contact 40 through the shunt 10. When the stationary contact 41 and the moving contact 40 are closed, the first position 441, the shunt 10, and the fourth position 444 form a circuit, and the second voltage signal between the first position 441 and the fourth position 444 can be detected on the PCB44. Thus, the current value can be calculated based on the second voltage signal, the power consumption can be accumulated, and overload protection can be performed in a timely manner based on the current value.

[0071] In some embodiments, the first conductive element 20 is a torsion spring 45, the first torsion arm 451 of the torsion spring 45 is connected to the second position 442, and the second torsion arm 452 of the torsion spring 45 is connected to the stationary contact 41.

[0072] Figure 2 This is a partial structural schematic diagram of a circuit breaker 1 provided in an embodiment of this application. Figure 3 This is the corresponding embodiment provided in this application. Figure 2 A schematic diagram of the local structure from another angle. (For example...) Figure 2 and Figure 3 As shown, the first conductive element 20 can be a torsion spring 45, and a conductive pin 46 can be provided at the second position 442 of the PCB 44, so that the first torsion arm 451 of the torsion spring 45 can abut against the conductive pin 46 under the action of torque, thereby tightly connecting with the second position 442. The second torsion arm 452 of the torsion spring 45 can be connected to the stationary contact 41 by abutting against the stationary arc angle 47 that is connected to the stationary contact 41.

[0073] The second position 442 and the stationary contact 41 are connected by the torsion arm of the torsion spring 45 against the conductive pin 46 or the stationary arc angle 47. The torque can be used to make the connection tight and reliable, and avoid too many circuits in the circuit breaker 1, making the internal circuit structure of the circuit breaker 1 simple and clean.

[0074] In some embodiments, the first conductive element 20 is a lead wire, with a first end connected to the second position 442 and a second end connected to the stationary contact 41. Directly connecting the second position 442 and the stationary contact 41 via a lead wire provides a simple structure and effectively establishes a connection between the two.

[0075] In some embodiments, the second conductive element 30 is a torsion spring 45, the first torsion arm 451 of the torsion spring 45 is connected to the conductive plate 42, and the second torsion arm 452 of the torsion spring 45 is connected to the third position 443.

[0076] refer to Figure 2 and Figure 3 The second conductive element 30 can be a torsion spring 45, and a conductive pin 46 can be provided at the third position 443 of the PCB 44, so that the second torsion arm 452 of the torsion spring 45 can abut against the conductive pin 46 under the action of torque, thereby tightly connecting with the third position 443. The first torsion arm 451 of the torsion spring 45 can be connected to the main power supply or the auxiliary power supply by abutting against the conductive plate 42 connected to the main power supply and the auxiliary power supply.

[0077] In some embodiments, the second conductive element 30 is a lead wire, with its first end connected to the conductive plate 42 and its second end connected to the third position 443. Directly connecting the conductive plate 42 and the third position 443 via the lead wire provides a simple structure and effectively establishes a connection between the two.

[0078] In one example, taking a specific circuit breaker 1 as an example, the dual power supply circuit structure of this embodiment will be described in detail.

[0079] On the first side of the circuit breaker 1, there are positive busbar terminal 2 and negative busbar terminal 3, which are used to connect to the positive and negative terminals of the main power supply located outside. When the power supply circuit in the circuit breaker 1 is the first power supply circuit, the main power supply can supply power to the PCB44 of the circuit breaker 1 through the positive busbar terminal 2 and negative busbar terminal 3.

[0080] Specifically, the other end of the positive busbar 2 is connected to the third end 103 of the shunt, the second end 102 of the shunt is connected to the first position 441 of the PCB44, the other end of the negative busbar 3 is connected to the first end 301 of the second conductive element, and the second end 302 of the second conductive element is connected to the third position 443 of the PCB44. The main power supply, the positive busbar 2, the shunt 10, the PCB44, the second conductive element 30, and the negative busbar 3 form the first power supply circuit, so that the main power supply can supply power to the PCB44.

[0081] On the second side of the circuit breaker 1, an auxiliary power supply is provided. The positive and negative terminals of the auxiliary power supply are connected to the first conductive element 20 and the second conductive element 30, respectively. When the power supply circuit in the circuit breaker 1 is the second power supply circuit, the auxiliary power supply can supply power to the PCB44 of the circuit breaker 1 through the first conductive element 20 and the second conductive element 30.

[0082] Specifically, the first end 201 of the first conductive element is connected to the second position 442 of the PCB44, and the second end 302 of the second conductive element is connected to the third position 443 of the PCB44. The auxiliary power supply, the first conductive element 20, the PCB44, and the second conductive element 30 form a second power supply circuit, so that the auxiliary power supply can supply power to the PCB44.

[0083] In some embodiments, the first end 101 of the shunt is connected to the moving contact 40, and the second end 202 of the first conductive element is connected to the stationary contact 41. The position of the moving contact 40 is moved by the transmission structure to realize the opening and closing of the circuit breaker 1.

[0084] When the power supply circuit is the first power supply circuit, the first end 201 of the first conductive element connected to the second position 442 can serve as a signal feedback terminal to detect the voltage signal of the second position 442. When the moving contact 40 and the stationary contact 41 are closed, current flows through the second position 442, and voltage can be detected at the second position 442. Based on the voltage value detected at the second position 442 being greater than 0, the PCB 44 determines that the current circuit breaker 1 is in the closed state. When the moving contact 40 and the stationary contact 41 are open, no current flows through the second position 442, therefore, the detected voltage is 0. Based on the voltage detected at the second position 442 being 0, the PCB 44 determines that the current circuit breaker 1 is in the open state.

[0085] Therefore, when the power supply circuit is the first power supply circuit, the main power supply supplies power to PCB44. PCB44 can determine whether the voltage value detected by the second position 442 is 0, and whether the circuit breaker 1 is currently in the open or closed state.

[0086] In some embodiments, the shunt 10 further includes a fourth terminal 104, which is connected to the fourth position 444 of the PCB 44. When the power supply circuit is the second power supply circuit, the auxiliary power supply supplies power to the second position 442 and the third position 443 of the PCB 44 through the first conductive element 20 and the second conductive element 30, thereby supplying power to the PCB 44. At this time, the fourth position 444 of the PCB 44 can detect the voltage signal of the shunt 10. Based on the voltage value of the detected voltage signal, the PCB 44 can calculate the current value of the fourth position 444, thereby calculating the power consumption of the PCB 44, or, if the current value exceeds the rated value, determining that the circuit breaker 1 is currently in an overload state and providing overload protection for the circuit breaker 1.

[0087] In some embodiments, the shunt 10 includes a conductive body, a first lead, and a second lead. A first end of the conductive body is connected to the main power supply, a second end of the conductive body is flexibly connected to the moving contact 40, the first lead is connected to a first position 441 of the PCB 44, and the second lead is connected to a fourth position 444 of the PCB 44.

[0088] Specifically, a flexible connection refers to a conductor connecting two components that can extend or move, such as a flexible wire. When the moving contact 40 moves toward the shunt 10, the flexible wire bends; when the moving contact 40 moves away from the shunt 10, the flexible wire stretches.

[0089] In some embodiments, a conductive pin 46 is provided at the second position 442 of the PCB 44, the first conductive element 20 is a torsion spring 45, the first torsion arm 451 of the torsion spring 45 is connected to the stationary contact 41, and the second torsion arm 452 of the torsion spring 45 is connected to the conductive pin 46; and / or, a conductive pin 46 is provided at the third position 443 of the PCB 44, the second conductive element 30 is a torsion spring 45, the first torsion arm 451 of the torsion spring 45 is connected to the main power supply, and the second torsion arm 452 of the torsion spring 45 is connected to the conductive pin 46.

[0090] Specifically, the second torsion arm 452 of the torsion spring 45 abuts against the conductive needle 46 under the action of torque, thus completing the connection with the conductive needle 46.

[0091] In some embodiments, the stationary contact 41 is connected to the first conductive element 20 via a stationary arc angle 47.

[0092] Specifically, the stationary contact 41 is connected to one end of the stationary arc angle 47, and the first torsion arm 451 of the torsion spring 45 abuts against the other end of the stationary arc angle 47 under the action of torque.

[0093] In some embodiments, the main power supply and the second conductive element 30 are connected via an N-pole through-plate.

[0094] The N-pole through plate is the aforementioned conductive plate 42.

[0095] Specifically, the main power supply is connected to one end of the positive busbar 2, and the other end of the positive busbar 2 is connected to one end of the N-pole through plate. The first torsion arm 451 of the torsion spring 45 abuts against the other end of the N-pole through plate under the action of torque.

[0096] The dual power supply circuit provided in this application embodiment sets three positions on PCB44, with the first position 441 connected to the main power supply, the second position 442 connected to the auxiliary power supply, and the third position 443 connected to both the main power supply and the auxiliary power supply. When the current power supply fails, it can switch to another power supply. Thus, by setting two power supply circuits, the circuit breaker 1 is always powered and can always work normally without being affected by power outages, insufficient voltage, etc.

[0097] This application also provides a dual power supply method, which is applied to a dual power supply circuit as described in any of the above embodiments. Figure 4 This is a schematic flowchart of a dual power supply method provided in an embodiment of this application. Figure 4 As shown, the dual power supply method provided in this application embodiment may include:

[0098] S101. Obtain the first voltage signal of the first power supply circuit.

[0099] When powered by the main power supply, the first voltage signal of PCB44 can be detected through the second position 442 in the dual power supply circuit.

[0100] S102. When the voltage value corresponding to the first voltage signal is 0, determine that the circuit breaker 1 is in the open state.

[0101] The second position 442 is part of the circuit formed by the second position 442, stationary contact 41, moving contact 40, shunt 10, and PCB 44. When the moving contact 40 and stationary contact 41 are open, no current flows through the circuit, so the voltage is 0. Since the moving contact 40 and stationary contact 41 are open when the circuit breaker 1 is in the open state, the circuit breaker 1 can be determined to be in the open state by the voltage value of the first voltage signal being 0.

[0102] S103. When the voltage value corresponding to the first voltage signal is not 0, determine that the circuit breaker 1 is in the closed state.

[0103] Similar to S102, the second position 442 is part of the circuit formed by the second position 442, stationary contact 41, moving contact 40, shunt 10, and PCB 44. When the moving contact 40 and stationary contact 41 are closed, current flows through this circuit, so the voltage is not zero. Since the moving contact 40 and stationary contact 41 are closed when the circuit breaker 1 is in the closed state, the circuit breaker 1 can be determined to be in the closed state by the fact that the voltage value of the first voltage signal is not zero.

[0104] When the main power supply is in operation, the signal value of the first voltage signal of the second position 442, which does not participate in the power supply, is collected and judged by using the closed relationship between the second position 442 (which does not participate in the power supply) and the moving and stationary contacts 41, as well as the relationship between the closed relationship and the opening and closing state of the circuit breaker 1, so as to determine the current opening and closing state of the circuit breaker 1.

[0105] Optionally, after S101, it may also include:

[0106] When the voltage value or voltage change value corresponding to the first voltage signal is within an abnormal range, it is determined that the main power supply has failed, and the power supply is switched to the second power supply circuit to supply power to PCB44.

[0107] Understandably, whether the power supply voltage meets the voltage requirements of electrical equipment determines whether the equipment can function properly. For example, if the voltage is insufficient, some components of the equipment cannot operate normally. Furthermore, large voltage fluctuations supplied to the equipment can easily cause breakdowns, leading to equipment damage and increased maintenance costs.

[0108] Therefore, after obtaining the first voltage through the second position 442, PCB44 can also monitor the voltage value or the change in voltage value. When the voltage value exceeds a certain set threshold, or the change in voltage value is too large, it is determined that there is an abnormality in the current power supply circuit, and the power supply is switched from the main power supply to the auxiliary power supply in a timely manner to avoid damage to circuit breaker 1 or failure of circuit breaker 1 to normal operation due to insufficient voltage.

[0109] Optionally, after switching to the second power supply circuit to supply power to the printed circuit board PCB44, the following is also included:

[0110] S201, Obtain the second voltage signal of the second power supply circuit.

[0111] When the auxiliary power supply is in operation, the second voltage signal between the first position 441 and the fourth position 444 on the PCB44 can be detected through the second position 442 in the dual power supply circuit.

[0112] S202. Determine the current value in the second power supply circuit based on the second voltage signal.

[0113] In the circuit formed by the second position 442, the shunt 10, the first position 441, and the PCB 44, the second voltage signal between the first position 441 and the second position 442 is the voltage signal across the shunt 10, so the current value flowing through the shunt 10 can be calculated based on the voltage value of the second voltage signal.

[0114] S203. Determine the power consumption of circuit breaker 1 based on the current value, and / or, provide overload protection for circuit breaker 1 when the current value exceeds a preset threshold.

[0115] When the auxiliary power supply is used, the power consumption of circuit breaker 1 is calculated based on the current value of shunt 10. This allows for timely monitoring of power consumption when the auxiliary power supply is a battery, facilitating the determination of the remaining battery power based on its available capacity and the power consumption of circuit breaker 1. This enables timely replacement of the battery or switching to main power supply when the battery power is insufficient.

[0116] In addition, by monitoring the current flowing through circuit breaker 1, overload protection can be provided in a timely manner when the current value is too high, thus preventing circuit breaker 1 from short-circuiting and incurring additional maintenance costs.

[0117] The dual power supply method provided in this application embodiment can determine the opening and closing status of circuit breaker 1 by monitoring the first voltage signal of PCB44 when the main power supply is on.

[0118] This application also provides a circuit breaker 1, which includes the dual power supply circuit in the above embodiments. When the dual power supply circuit is working, the dual power supply method in the above embodiments is executed.

[0119] In one example, the dual power supply method executed by the dual power supply circuit during the operation of circuit breaker 1 is described in detail. In the dual power supply circuit provided in the above embodiment, the dual power supply method allows the first power supply circuit and the second power supply circuit in the dual power supply circuit to switch between each other.

[0120] Specifically, after PCB44 obtains the first voltage signal from the second position 442 in the first power supply circuit, it determines whether the first voltage value or the first change value of the first voltage signal belongs to an abnormal range. When the first voltage value belongs to the first abnormal range, or the first change value belongs to the second abnormal range, it can be determined that the main power supply in the first power supply circuit that supplies power to PCB44 has failed. At this time, the power supply circuit is switched to the second power supply circuit, and the auxiliary power supply supplies power to PCB44.

[0121] Similarly, when the power supply circuit in circuit breaker 1 is the second power supply circuit, it can be determined whether to switch the power supply circuit to the first power supply circuit by checking whether the second voltage value or the second change value of the second voltage signal is within the abnormal range.

[0122] By determining whether the voltage value or voltage change value of the current power supply circuit is within an abnormal range, it is possible to promptly detect whether there is a fault in the power supply of the current power supply circuit, thereby switching the power supply circuit in a timely manner to ensure that PCB44 is always powered and working normally.

[0123] In some embodiments, the switching between the first power supply circuit and the second power supply circuit can be restricted by abnormal time and / or abnormal number of times.

[0124] For example, when the auxiliary power source is a battery and the battery is nearly depleted, a main power supply failure causes the power supply circuit to switch to a second power supply circuit powered by the auxiliary power source. Before the main power supply is repaired, the battery is exhausted and unable to provide normal voltage. At this time, circuit breaker 1 determines to switch the power supply circuit to the first power supply circuit based on the second voltage value or second change value of the second voltage signal. Since the main power supply has not yet been successfully repaired, the circuit is again switched to the second power supply circuit based on the first voltage signal. Because detecting the voltage signal, determining whether to switch the power supply circuit, and switching the circuit are all very quick, when both the main power supply and auxiliary power supply are experiencing power supply abnormalities, the number of switching operations can be limited by an abnormal time or number of abnormal events to avoid wasted effort when switching power supply circuits multiple times. For example, if the number of abnormal events in the first and second voltage signals exceeds five within the abnormal time period, it can be determined that neither power supply circuit is functioning properly. A warning message can be sent to the user via a buzzer or data packet to prompt the user to resolve the issue.

[0125] In some embodiments, the circuit breaker 1 provided in this application is a plug-in circuit breaker 1.

[0126] In summary, the dual power supply circuit, method, and circuit breaker 1 provided in this application embodiment, by setting three positions on PCB 44—connecting the first position 441 to the main power supply, the second position 442 to the auxiliary power supply, and the third position 443 to both the main and auxiliary power supplies—can switch to another power supply when the current power supply fails. This ensures that the circuit breaker 1 is always powered, unaffected by power outages or insufficient voltage, and can operate normally at all times. Furthermore, when the main power supply is on, the opening and closing status of the circuit breaker 1 can be determined by monitoring the first voltage signal on PCB 44.

[0127] In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" as described in this application does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. This application can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims listing several means, several units of these means may be embodied by the same item of hardware. The use of "first," "second," and "third," etc., does not indicate any order and these words should be interpreted as names. Unless otherwise specified, the steps in the above embodiments should not be construed as limiting the order of execution.

[0128] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A dual power supply circuit, characterized in that, include: A shunt, wherein the first end of the shunt is connected to a moving contact, and the second end of the shunt is connected to a first position on a printed circuit board (PCB); A first conductive element, the first end of which is connected to a second position on the PCB, and the second end of which is connected to a stationary contact; The second conductive component has a first end connected to the conductive plate and a second end connected to the third position of the PCB. When powered by the main power supply, the main power supply, the shunt, the PCB, the second conductive component, and the conductive plate form a first power supply circuit; When the auxiliary power supply is in operation, the auxiliary power supply, the first conductive component, the PCB, the second conductive component, and the conductive plate form a second power supply circuit; wherein, the conductive plate is a long plate extending from the first side of the circuit breaker to the second side of the circuit breaker, the first side of the circuit breaker is connected to one side of the main power supply, and the second side of the circuit breaker is connected to one side of the auxiliary power supply. When the power supply circuit is the first power supply circuit, the first end of the first conductive element connected to the second position serves as a signal feedback end to detect the first voltage signal at the second position; When the moving contact and the stationary contact are closed, current flows through the second position and voltage is detected at the second position. The PCB determines that the circuit breaker is in the closed state based on the voltage value detected at the second position being greater than 0. When the moving contact and the stationary contact are disconnected, no current flows through the second position, and the voltage at the second position is detected to be 0. Based on the detected voltage of 0 at the second position, the PCB determines that the circuit breaker is currently in the open state.

2. The circuit according to claim 1, characterized in that, When the auxiliary power supply is in operation, the shunt is used to detect a second voltage signal on the PCB at the first location.

3. The circuit according to claim 1, characterized in that, The first conductive element is a torsion spring, the first torsion arm of which is connected to the second position, and the second torsion arm of which is connected to the stationary contact; or, The first conductive element is a lead wire, the first end of which is connected to the second position, and the second end of which is connected to the stationary contact.

4. The circuit according to claim 1, characterized in that, The second conductive element is a torsion spring, the first torsion arm of which is connected to the conductive plate, and the second torsion arm of which is connected to the third position; or, The second conductive element is a lead wire, the first end of which is connected to the conductive plate, and the second end of which is connected to the third position.

5. A dual power supply method, characterized in that, Applied to the dual power supply circuit as described in claim 2, the method includes: Obtain the first voltage signal of the first power supply circuit; When the voltage value corresponding to the first voltage signal is 0, the circuit breaker is determined to be in the open state; When the voltage value corresponding to the first voltage signal is not 0, the circuit breaker is determined to be in the closed state.

6. The method according to claim 5, characterized in that, After acquiring the first voltage signal of the first power supply circuit, the method further includes: When the voltage value corresponding to the first voltage signal or the change value of the voltage value is within an abnormal range, it is determined that the main power supply has failed, and the power supply is switched to the second power supply circuit to supply power to the PCB.

7. The method according to claim 6, characterized in that, After switching to the second power supply circuit to supply power to the printed circuit board (PCB), the method further includes: Obtain the second voltage signal of the second power supply circuit; The current value in the second power supply circuit is determined based on the second voltage signal; The power consumption of the circuit breaker is determined based on the current value; and / or, the circuit breaker is overload protected when the current value exceeds a preset threshold.

8. A circuit breaker, characterized in that, include: The dual power supply circuit according to any one of claims 1 to 4, when the dual power supply circuit is in operation, performs the dual power supply method according to any one of claims 5 to 7.

9. The circuit breaker according to claim 8, characterized in that, The circuit breaker is a plug-in type circuit breaker.

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