Dual power switching control device

Abstract

The utility model provides a kind of dual power switching control device, it is related to power management field.The device includes: configurable voltage sampling unit, power supply unit and controller;Configurable voltage sampling unit includes first variable circuit and second variable circuit, first variable circuit and second variable circuit are connected with the first end of controller, first variable circuit is connected with first power supply, second variable circuit is connected with second power supply, first variable circuit and / or second variable circuit carry out voltage sampling when power on, and transmission sampling result to controller, wherein, first variable circuit, second variable circuit are different when power supply mode is different, resistance connection mode is different.The utility model can realize the switching of dual power, and, can under multiple input mode, all realize voltage sampling, to improve the flexibility of dual power switching control device.In addition, it also reduces the volume of device and reduces wiring difficulty, improves the rationality of space layout.

Description

Technical Field

[0001] This utility model relates to the field of power management, and more specifically, to a dual power supply switching control device. Background Technology

[0002] A dual power supply switching and protection device is an electrical device used to automatically or manually switch between two power sources and ensure power supply continuity.

[0003] Existing dual-power switching and protection devices can only handle one input method, resulting in insufficient flexibility. Furthermore, their wiring is complex, their size is large, they cannot meet the space requirements of compact devices, and they also suffer from unreasonable spatial layout. Utility Model Content

[0004] The purpose of this invention is to provide a dual power supply switching control device that can flexibly handle multiple input methods while also meeting the space requirements of compact equipment.

[0005] This utility model provides a dual power supply switching control device, including: a configurable voltage sampling unit, a power supply unit, and a controller; The first input terminal of the configurable voltage sampling unit is used to connect to a first power supply, the second input terminal of the configurable voltage sampling unit is used to connect to a second power supply, and the output terminal of the configurable voltage sampling unit is connected to the first terminal of the controller; The first input terminal of the power supply unit is used to connect to a first power source, the second input terminal of the power supply unit is used to connect to a second power source, the output terminal of the power supply unit is connected to the second terminal of the controller to supply power to the controller, and the third terminal of the controller is connected to an external mechanism. The configurable voltage sampling unit includes a first variable circuit and a second variable circuit. Both the first variable circuit and the second variable circuit are connected to a first terminal of the controller. The first variable circuit is connected to the first power supply, and the second variable circuit is connected to the second power supply. The first variable circuit and / or the second variable circuit perform voltage sampling when powered on and transmit the sampling result to the controller. The first variable circuit and the second variable circuit have different resistor connection methods when the power supply mode is different.

[0006] The beneficial effects of the dual power supply switching control device provided by this utility model are as follows: By setting a configurable voltage sampling unit, a power supply unit, and a controller in the dual power supply switching control device, and setting a first variable circuit and a second variable circuit in the configurable voltage sampling unit, voltage sampling can be performed through the first variable circuit and the second variable circuit when powered on, and the sampling result is transmitted to the controller, thereby realizing the switching of dual power supplies. Furthermore, through the first variable circuit and the second variable circuit, voltage sampling can be achieved under various input methods of the first and second power supplies, thereby improving the flexibility of the dual power supply switching control device. In addition, since only a configurable voltage sampling unit, a power supply unit, and a controller are set in the dual power supply switching control device, the size of the dual power supply switching control device is reduced, the wiring difficulty is reduced, and the rationality of the spatial layout is improved. Attached Figure Description

[0007] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 A schematic diagram of a dual power supply switching control device provided in this application; Figure 2 Another schematic diagram of the dual power supply switching control device provided in this application; Figure 3 A schematic diagram of a first structure of the first variable circuit in the dual power supply switching control device provided in this application; Figure 4 A schematic diagram of a structure in the dual power supply switching control device provided in this application, in which a voltage sampling unit can be configured; Figure 5 A schematic diagram of a second structure of the first variable circuit in the dual power supply switching control device provided in this application; Figure 6 Another schematic diagram of the structure of the dual power supply switching control device provided in this application, which can be configured with a voltage sampling unit; Figure 7 A schematic diagram of a third structure of the first variable circuit in the dual power supply switching control device provided in this application; Figure 8 Another structural schematic diagram of the dual power supply switching control device provided in this application, which can be configured with a voltage sampling unit; Figure 9 A schematic diagram of an operational amplifier submodule in the dual power supply switching control device provided in this application; Figure 10 A schematic diagram of the structure of the first variable circuit in the dual power supply switching control device provided in the embodiments of this application; Figure 11 Another structural schematic diagram of the dual power supply switching control device provided in this application; Figure 12 A schematic diagram of the first power supply module in the dual power supply switching control device provided in this application; Figure 13 A schematic diagram of the structure of the first rectifier module in the dual power supply switching control device provided in this application; Figure 14 A schematic diagram of the first step-down module in the dual power supply switching control device provided in this application; Figure 15 Another structural schematic diagram of the dual power supply switching control device provided in this application; Figure 16 This is another structural schematic diagram of the dual power supply switching control device provided in this application; Figure 17 This is another structural schematic diagram of the dual power supply switching control device provided in this application; Figure 18 This is another structural schematic diagram of the dual power supply switching control device provided in this application; Figure 19 A schematic diagram of the first hardware structure of the dual power supply switching control device provided in this application; Figure 20 This is a schematic diagram of a second hardware structure for the dual power supply switching control device provided in this application.

[0009] Icons: Resistor R1; Resistor R2; Resistor R3; Resistor R4; Resistor R5; Resistor R6; Resistor R7; Resistor R8; Resistor R9; Resistor R10; Resistor R11; Resistor R12; Resistor R13; Resistor R14; Resistor R15; Resistor R16; Resistor R17; Resistor R18; Resistor R19; Resistor R20; Resistor R21; Resistor R22; Resistor R23; Resistor R24; Resistor R25; Resistor R26; Resistor R27; Resistor R28; Resistor R29; Resistor R30; Resistor R31; Resistor R32; Resistor R33; Resistor R34; Resistor R35; Resistor R36; Resistor R37 (37th); Resistor R38 (38th); Capacitor C1 (1st); Capacitor C2 (2nd); Capacitor C3 (3rd); Capacitor C4 (4th); Capacitor C5 (5th); Capacitor C6 (6th); Capacitor C7 (7th); Capacitor C8 (8th); Capacitor C9 (9th); Capacitor C10 (10th); Capacitor C11 (11th); Capacitor C12 (12th); Capacitor C13 (13th); Capacitor C14 (14th); Capacitor C15 (15th); Capacitor C16 (16th); Capacitor C17 (17th); Operational Amplifier U0; Inductor L1 (1st); Inductor L2 (2nd); Potentiometer RV1 (1st); Diode D1 (1st); Diode D2 (2nd); Diode D3 (3rd); Diode D4 (4th); Diode D5 (5th); Diode D6 (6th); Diode D7 (7th); Diode D8 (8th); Transformer T; Switching Chip U1; Optocoupler Switch U2; Operational Amplifier U3; Common Mode Inductor L3 (1st); Variable Resistor RM1 (1st); Switch S1 (1st); Switch S2 (2nd); Switch S3 (3rd); Switch S4 (4th). Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0011] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0012] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0013] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0014] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0015] Existing dual-power switching and protection devices can only handle one input method, resulting in insufficient flexibility. Furthermore, their wiring is complex, their size is large, they cannot meet the space requirements of compact devices, and they also suffer from unreasonable spatial layout.

[0016] Please see Figure 1 , Figure 1 This is a schematic diagram of a dual power supply switching control device provided in this application. This embodiment provides a dual power supply switching control device, which includes: a configurable voltage sampling unit, a power supply unit, and a controller.

[0017] The first input terminal of the configurable voltage sampling unit is used to connect to the first power supply, the second input terminal of the configurable voltage sampling unit is used to connect to the second power supply, and the output terminal of the configurable voltage sampling unit is connected to the first terminal of the controller; the first input terminal of the power supply unit is used to connect to the first power supply, the second input terminal of the power supply unit is used to connect to the second power supply, and the output terminal of the power supply unit is connected to the second terminal of the controller to supply power to the controller; the third terminal of the controller is connected to an external mechanism.

[0018] The configurable voltage sampling unit includes a first variable circuit and a second variable circuit. Both the first and second variable circuits are connected to the first terminal of the controller. The first variable circuit is connected to the first power supply, and the second variable circuit is connected to the second power supply. The first and / or second variable circuits perform voltage sampling when powered on and transmit the sampling results to the controller. The first and second variable circuits have different resistor connection methods when the power supply mode is different.

[0019] Optionally, the first power supply can be a main power supply, and the second power supply can be a backup power supply. The first variable circuit in the configurable voltage sampling unit can sample the voltage of the first power supply when the first variable circuit is powered on, and transmit the sampling result to the controller.

[0020] Optionally, the second variable circuit in the configurable voltage sampling unit can sample the voltage of the second power supply when the second variable circuit is powered on, and transmit the sampling result to the controller.

[0021] Optionally, the first variable circuit includes multiple resistors, and the second variable circuit includes multiple resistors. The different resistor connection methods when the power supply mode is different can be understood as follows: when the type of the first power supply is different, the resistor connection method in the first variable circuit is different; when the type of the second power supply is different, the resistor connection method in the second variable circuit is different.

[0022] It should be noted that the different resistor connection methods mentioned in the embodiments of this application may refer to different numbers of resistors, connection relationships, etc. In specific implementation, they can be adjusted by technicians, or mainly in the simulation experiment stage, they can be flexibly changed by design parameters and instructions, and are not specifically limited here.

[0023] For example, the type of the first power supply refers to the power supply mode of the first power supply. For instance, when the first power supply is a two-phase power supply type, that is, the first power supply is a two-phase power supply, the resistor connection method in the first variable circuit can be the first connection method.

[0024] For example, when the first power supply is a three-phase three-wire power supply, the resistor connection method in the first variable circuit can be the second connection method. The first connection method differs from the second connection method.

[0025] For example, the type of the second power supply refers to the power supply mode of the second power supply. For instance, when the second power supply is a two-phase power supply, that is, the second power supply is a two-phase power supply, the resistor connection method in the second variable circuit can be the first connection method.

[0026] For example, when the second power supply is a three-phase three-wire power supply, the resistor connection method in the second variable circuit can be a second connection method. The first connection method differs from the second connection method.

[0027] Optionally, when the first power supply is connected, the first variable circuit performs voltage sampling; when the second power supply is connected, the second variable circuit performs voltage sampling. The controller receives the sampling results from the first and / or second variable circuits and sends signals to external mechanisms based on the sampling results.

[0028] Optionally, an external mechanism is disposed between the first power supply, the second power supply, the controller, and the external load. Under the action of a control signal sent by the controller, the external mechanism can connect the external load to the first power supply and disconnect the external load from the second power supply, or disconnect the external load from the second power supply and connect the external load to the first power supply.

[0029] For example, the controller includes a voltage comparator and a transistor. The sampling results of the first variable circuit and the second variable circuit can be connected to the non-inverting input and the inverting input of the voltage comparator, respectively. The comparison result is input to the transistor through the output of the voltage comparator. The output of the transistor controls the external mechanism, thereby connecting the external load to the first power supply and disconnecting the external load from the second power supply, or disconnecting the external load from the second power supply and connecting the external load to the first power supply.

[0030] In this embodiment, by incorporating a configurable voltage sampling unit, a power supply unit, and a controller into the dual-power switching control device, and by including a first variable circuit and a second variable circuit within the configurable voltage sampling unit, voltage sampling can be performed upon power-up via the first and second variable circuits, and the sampling results can be transmitted to the controller, thereby achieving dual-power switching. Furthermore, the first and second variable circuits enable voltage sampling under various input modes of both the first and second power supplies, thus improving the flexibility of the dual-power switching control device. In addition, since only a configurable voltage sampling unit, a power supply unit, and a controller are included in the dual-power switching control device, the size of the device is reduced, wiring complexity is lowered, and the rationality of the spatial layout is improved.

[0031] As one possible implementation method, Figure 2 Here is another structural schematic diagram of the dual power supply switching control device provided in this application, with reference to... Figure 2 As shown, in Figure 1 Based on this, the configurable voltage sampling unit also includes multiple operational amplifier sub-modules; the first variable circuit and the second variable circuit are respectively connected to at least one corresponding operational amplifier sub-module.

[0032] Optionally, each operational amplifier submodule is also connected to the controller. Each operational amplifier submodule is used to perform operational amplification processing on the sampling results of the first variable circuit and the second variable circuit, and transmit them to the controller.

[0033] Optionally, the number of operational amplifier submodules can vary depending on the power supply mode. For example, when the power supply mode is two-phase, two operational amplifier submodules can be set, with one operational amplifier submodule corresponding to each of the first and second variable circuits. When the power supply mode is not two-phase, six operational amplifier submodules can be set, with three operational amplifier submodules corresponding to each of the first and second variable circuits.

[0034] By setting an operational amplifier submodule in the configurable voltage sampling unit, the sampling results of the first and second variable circuits can be conditioned, thereby converting the original sampled signal into a clean and stable electrical signal that the controller can accurately process, thus improving the accuracy of dual power supply switching.

[0035] The first variable circuit, the second variable circuit, and each operational amplifier submodule are described in detail below with reference to several embodiments.

[0036] It is worth noting that in this application, the first variable circuit and the second variable circuit are simultaneously connected to the first power supply and the second power supply with the same power supply mode. Therefore, the first variable circuit and the second variable circuit have the same circuit structure. The following description will only take the first variable circuit as an example.

[0037] As one possible implementation method, Figure 3 This is a schematic diagram of a first structure of the first variable circuit in the dual power supply switching control device provided in this application, with reference to... Figure 3 As shown, when the first power supply and the second power supply are two-phase power supplies, the first variable circuit includes: a first resistor R1, a second resistor R2, an eleventh resistor R11, and a twelfth resistor R12.

[0038] One end of the first resistor R1 is connected to phase A of the first power supply, and the other end of the first resistor R1 is connected to one end of the second resistor R2. The other end of the second resistor R2 is connected to at least one corresponding operational amplifier submodule. One end of the eleventh resistor R11 is connected to phase N of the first power supply, and the other end of the eleventh resistor R11 is connected to one end of the twelfth resistor R12. The other end of the twelfth resistor R12 is connected to at least one corresponding operational amplifier submodule.

[0039] Optionally, the first resistor R1, the second resistor R2, the eleventh resistor R11, and the twelfth resistor R12 are used to sample the voltage sampling result of the first power supply under two-phase power supply.

[0040] As one possible implementation method, Figure 4 This is a schematic diagram of a configuration for a voltage sampling unit in the dual power supply switching control device provided in this application, with reference to... Figure 4 As shown, in Figure 3 Based on this, when the first power supply and the second power supply are two-phase power supplies, the configurable voltage sampling unit includes: a first operational amplifier submodule.

[0041] The other end of the second resistor R2 is connected to the first input terminal of the first operational amplifier submodule, the other end of the twelfth resistor R12 is connected to the second input terminal of the first operational amplifier submodule, and the output terminal of the first operational amplifier submodule is connected to the first terminal of the controller.

[0042] Optionally, when the first power supply and the second power supply are two-phase power supplies, the first variable circuit corresponds to an operational amplifier submodule, and the second variable circuit corresponds to an operational amplifier submodule. That is, the first variable circuit corresponds to the first operational amplifier submodule. The first operational amplifier submodule is used to perform signal conditioning on the voltage sampling result of the first power supply, thereby converting the voltage sampling result of the first power supply into a clean and stable electrical signal that the controller can accurately process, thus improving the accuracy of dual power supply switching.

[0043] As one possible implementation method, Figure 5 This is a schematic diagram of a second structure of the first variable circuit in the dual power supply switching control device provided in this application, with reference to... Figure 5 As shown, when the first power supply and the second power supply are three-phase three-wire power supplies, the first variable circuit includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a ninth resistor R9, a tenth resistor R10, a thirteenth resistor R13, a fourteenth resistor R14, a seventeenth resistor R17, and an eighteenth resistor R18.

[0044] One end of the first resistor R1 is connected to phase A of the first power supply, and the other end of the first resistor R1 is connected to one end of the second resistor R2. The other end of the second resistor R2 is connected to at least one corresponding operational amplifier submodule.

[0045] One end of the fifth resistor R5 is used to connect to phase A of the first power supply, and the other end of the fifth resistor R5 is connected to one end of the sixth resistor R6. The other end of the sixth resistor R6 is connected to at least one corresponding operational amplifier submodule.

[0046] One end of the third resistor R3 is used to connect to phase B of the first power supply, and the other end of the third resistor R3 is connected to one end of the fourth resistor R4. The other end of the fourth resistor R4 is connected to at least one corresponding operational amplifier submodule.

[0047] One end of the seventeenth resistor R17 is used to connect to phase B of the first power supply, and the other end of the seventeenth resistor R17 is connected to one end of the eighteenth resistor R18. The other end of the eighteenth resistor R18 is connected to at least one corresponding operational amplifier submodule.

[0048] One end of the ninth resistor R9 is used to connect to phase C of the first power supply, and the other end of the ninth resistor R9 is connected to one end of the tenth resistor R10. The other end of the tenth resistor R10 is connected to at least one corresponding operational amplifier submodule.

[0049] One end of the thirteenth resistor R13 is used to connect to phase C of the first power supply. The other end of the thirteenth resistor R13 is connected to one end of the fourteenth resistor R14. The other end of the fourteenth resistor R14 is connected to at least one corresponding operational amplifier submodule.

[0050] Optionally, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the ninth resistor R9, the tenth resistor R10, the thirteenth resistor R13, the fourteenth resistor R14, the seventeenth resistor R17, and the eighteenth resistor R18 are used to sample the voltage sampling results of the first power supply under three-phase three-wire power supply.

[0051] As one possible implementation method, Figure 6 Here is another schematic diagram of the dual power supply switching control device provided in this application, which can be configured with a voltage sampling unit, referred to... Figure 6 As shown, in Figure 5 Based on this, when the first power supply and the second power supply are three-phase three-wire power supplies, the configurable voltage sampling unit includes: a first operational amplifier submodule, a second operational amplifier submodule, and a third operational amplifier submodule.

[0052] The other end of the second resistor R2 is connected to the first input terminal of the first operational amplifier submodule; the other end of the tenth resistor R10 is connected to the second input terminal of the first operational amplifier submodule; the other end of the fourth resistor R4 is connected to the first input terminal of the second operational amplifier submodule; the other end of the fourteenth resistor R14 is connected to the second input terminal of the second operational amplifier submodule; the other end of the sixth resistor R6 is connected to the first input terminal of the third operational amplifier submodule; the other end of the eighteenth resistor R18 is connected to the second input terminal of the third operational amplifier submodule; the output terminals of the first operational amplifier submodule, the second operational amplifier submodule, and the third operational amplifier submodule are connected to the first terminal of the controller.

[0053] Optionally, when the first power supply and the second power supply are three-phase three-wire power supplies, the first variable circuit corresponds to three operational amplifier sub-modules, and the second variable circuit corresponds to three operational amplifier sub-modules. That is, the first variable circuit corresponds to the first operational amplifier sub-module, the second operational amplifier sub-module, and the third operational amplifier sub-module. The second operational amplifier sub-module and the third operational amplifier sub-module are respectively used to perform signal conditioning on the voltage sampling results of the first power supply, thereby converting the voltage sampling results of the first power supply into a clean and stable electrical signal that the controller can accurately process, thus improving the accuracy of dual power supply switching.

[0054] As one possible implementation method, Figure 7 This is a schematic diagram of a third structure of the first variable circuit in the dual power supply switching control device provided in this application, with reference to... Figure 7 As shown, when the first power supply and the second power supply are three-phase four-wire power supplies, the first variable circuit includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a seventh resistor R7, an eighth resistor R8, an eleventh resistor R11, a twelfth resistor R12, a fifteenth resistor R15, a sixteenth resistor R16, a nineteenth resistor R19, and a twentieth resistor R20.

[0055] One end of the first resistor R1 is connected to phase A of the first power supply, and the other end of the first resistor R1 is connected to one end of the second resistor R2. The other end of the second resistor R2 is connected to at least one corresponding operational amplifier submodule. One end of the third resistor R3 is connected to phase B of the first power supply, and the other end of the third resistor R3 is connected to one end of the fourth resistor R4. The other end of the fourth resistor R4 is connected to at least one corresponding operational amplifier submodule. One end of the seventh resistor R7 is connected to phase C of the first power supply, and the other end of the seventh resistor R7 is connected to one end of the eighth resistor R8. The other end of the eighth resistor R8 is connected to at least one corresponding operational amplifier submodule. One end of the eleventh resistor R11 is used for... For the N phase connected to the first power supply, one end of the eleventh resistor R11 is connected to one end of the twelfth resistor R12, and the other end of the twelfth resistor R12 is connected to at least one corresponding operational amplifier submodule; one end of the fifteenth resistor R15 is used to connect to the N phase of the first power supply, and the other end of the fifteenth resistor R15 is connected to one end of the sixteenth resistor R16, and the other end of the sixteenth resistor R16 is connected to at least one corresponding operational amplifier submodule; one end of the nineteenth resistor R19 is used to connect to the N phase of the first power supply, and the other end of the nineteenth resistor R19 is connected to one end of the twentieth resistor R20, and the other end of the twentieth resistor R20 is connected to at least one corresponding operational amplifier submodule.

[0056] Optionally, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the seventh resistor R7, the eighth resistor R8, the eleventh resistor R11, the twelfth resistor R12, the fifteenth resistor R15, the sixteenth resistor R16, the nineteenth resistor R19, and the twentieth resistor R20 are used to sample the voltage sampling results of the first power supply under a three-phase four-wire power supply.

[0057] As one possible implementation method, Figure 8 This is another structural schematic diagram of the dual power supply switching control device provided in this application, which can be configured with a voltage sampling unit. (Refer to...) Figure 8 As shown, in Figure 7 Based on this, the configurable voltage sampling unit includes: a first operational amplifier submodule, a second operational amplifier submodule, and a third operational amplifier submodule.

[0058] The other end of the second resistor R2 is connected to the first input terminal of the first operational amplifier submodule, and the other end of the twelfth resistor R12 is connected to the second input terminal of the first operational amplifier submodule; the other end of the fourth resistor R4 is connected to the first input terminal of the second operational amplifier submodule, and the other end of the sixteenth resistor R16 is connected to the second input terminal of the second operational amplifier submodule; the other end of the eighth resistor R8 is connected to the first input terminal of the third operational amplifier submodule, and the other end of the twentieth resistor R20 is connected to the second input terminal of the third operational amplifier submodule; the output terminals of the first operational amplifier submodule, the second operational amplifier submodule, and the third operational amplifier submodule are connected to the first terminal of the controller.

[0059] Optionally, when the first power supply and the second power supply are three-phase four-wire power supplies, the first variable circuit corresponds to three operational amplifier sub-modules, and the second variable circuit corresponds to three operational amplifier sub-modules. That is, the first variable circuit corresponds to the first operational amplifier sub-module, the second operational amplifier sub-module, and the third operational amplifier sub-module. The second operational amplifier sub-module and the third operational amplifier sub-module are respectively used to perform signal conditioning on the voltage sampling results of the first power supply, thereby converting the voltage sampling results of the first power supply into a clean and stable electrical signal that the controller can accurately process, thus improving the accuracy of dual power supply switching.

[0060] Alternatively, the circuitry of each operational amplifier submodule is identical. Figure 9 This is a schematic diagram of the operational amplifier submodule in the dual power supply switching control device provided in this application, with reference to... Figure 9 As shown, the operational amplifier submodule includes: resistor R21 (21st), resistor R22 (22nd), resistor R23 (23rd), resistor R24 ​​(24th), capacitor C1 (1st), capacitor C2 (2nd), capacitor C3 (3rd), capacitor C4 (4th), and operational amplifier U0.

[0061] The above provides a detailed explanation of the specific implementation of the first variable circuit, the second variable circuit, and each operational amplifier submodule when the power supply modes of the first and second power supplies are two-phase, three-phase three-wire, and three-phase four-wire. It should be understood that in practical applications, the power supply modes of the first and second power supplies can be determined in advance, and the variable circuit can be adjusted by adjusting the connection method of the resistors. Thus, the corresponding first and second variable circuits can be obtained under different power supply modes. For example, the connection method of the resistors can be adjusted by soldering.

[0062] It is worth noting that the first variable circuit and the second variable circuit in the dual power supply switching control device provided in this application can also support dynamic switching of multiple power supply modes at the same time. The first variable circuit is used as an example for illustrative explanation below.

[0063] Figure 10This is a schematic diagram of the first variable circuit in the dual power supply switching control device provided in the embodiments of this application, with reference to... Figure 10 As shown, the first variable circuit includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a first switch S1, a second switch S2, a third switch S3, and a fourth switch S4.

[0064] Each resistor can be connected according to its corresponding power supply mode. For details on the specific connection methods of each resistor and each switch, please refer to [reference needed]. Figure 10 As shown.

[0065] Optionally, each switch is also connected to the fourth terminal of the controller. When each resistor is connected to the first power supply, that is, when the dual power supply switching control device is powered on, the controller can control each switch to close or open based on the power supply mode of the first power supply, thereby realizing dynamic switching of multiple power supply modes.

[0066] For example, taking the power supply mode of the first power source as a two-phase power supply, the controller controls the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 to be disconnected.

[0067] For example, taking the power supply mode of the first power source as three-phase three-wire, the controller controls the first switch S1 to close, the second switch S2 to close, the third switch S3 to close, and the fourth switch S4 to close.

[0068] For example, taking the power supply mode of the first power source as three-phase four-wire, the controller controls the first switch S1 to open, the second switch S2 to open, the third switch S3 to open, and the fourth switch S4 to open.

[0069] Based on this, the configurable voltage sampling unit includes: a first operational amplifier submodule, a second operational amplifier submodule, and a third operational amplifier submodule.

[0070] The connection method between the configurable voltage sampling unit and the first variable circuit can be referred to the aforementioned embodiments, and will not be repeated here.

[0071] By setting the aforementioned multiple resistors and multiple switches in the first and second variable circuits, dynamic switching of multiple power supply modes can be achieved, thereby improving the flexibility of the dual power supply switching control device and enabling reasonable selection and adjustment according to circuit requirements in practical applications.

[0072] The first variable circuit, the second variable circuit, and the specific implementation of each operational amplifier submodule have been described in detail above. Based on this, the power supply unit will be described below.

[0073] As one possible implementation method, Figure 11 Here is another structural schematic diagram of the dual power supply switching control device provided in this application, with reference to... Figure 11 As shown, in Figure 1 Based on this, the power supply unit includes: a first power supply module and / or a second power supply module.

[0074] The input terminal of the first power supply module is used to connect to the first power source, and the output terminal of the first power supply module is connected to the second terminal of the controller; the input terminal of the second power supply module is used to connect to the second power source, and the output terminal of the second power supply module is connected to the second terminal of the controller.

[0075] For example, Figure 11 The power supply unit is shown as including a first power supply module and a second power supply module. The first power supply module and the second power supply module can generate power supply according to the first power supply and the second power supply to supply power to the controller.

[0076] By setting a first power supply module and / or a second power supply module in the power supply unit, the controller can be continuously powered, thereby ensuring the sustainability of dual power supply switching.

[0077] It is understood that the first power supply module and the second power supply module have the same circuit structure. The following explanation uses the first power supply module as an example to illustrate the circuit structure of the power supply module.

[0078] As one possible implementation method, Figure 12 This is a schematic diagram of the first power supply module in the dual power supply switching control device provided in this application, with reference to... Figure 12 As shown, the first power supply module includes: a first rectifier module and a first step-down module.

[0079] The input terminal of the first rectifier module is used to connect to the first power supply, the output terminal of the first rectifier module is connected to the input terminal of the first step-down module, and the output terminal of the first step-down module is connected to the second terminal of the controller.

[0080] As one possible implementation method, Figure 13 This is a schematic diagram of the first rectifier module in the dual power supply switching control device provided in this application, with reference to... Figure 13 As shown, in Figure 12Based on this, the first rectifier module includes: a first inductor L1, a second inductor L2, a first potentiometer RV1, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first common-mode inductor L3, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-seventh resistor R27, and a twenty-eighth resistor R28.

[0081] One end of the first inductor L1 and one end of the second inductor L2 are used to connect to one end of the first power supply. The other end of the first inductor L1 is connected to one end of the first potentiometer RV1, one end of the fifth capacitor C5, one end of the first diode D1 and one end of the third diode D3. The other end of the second inductor L2 is connected to the other end of the first potentiometer RV1, one end of the sixth capacitor C6, one end of the fourth diode D4 and one end of the second diode D2. The other end of the fifth capacitor C5 is connected to the other end of the sixth capacitor C6.

[0082] Specifically, one end of the first inductor L1 and one end of the second inductor L2 can be connected to different phases of the first power supply.

[0083] The other end of the first diode D1 is connected to the other end of the second diode D2 and the first end of the first common-mode inductor L3, and the other end of the third diode D3 is connected to the other end of the fourth diode D4 and the second end of the first common-mode inductor L3.

[0084] The third terminal of the first common-mode inductor L3 is connected to one end of the seventh capacitor C7, one end of the twenty-fifth resistor R25, and the input terminal of the first buck module. The fourth terminal of the first common-mode inductor L3 is connected to one end of the eighth capacitor C8 and one end of the twenty-eighth resistor R28.

[0085] The other end of the seventh capacitor C7 is connected to the other end of the eighth resistor, one end of the twenty-sixth resistor R26, and one end of the twenty-seventh resistor R27. The other end of the twenty-fifth resistor R25 is connected to the other end of the twenty-sixth resistor R26, and the other end of the twenty-seventh resistor R27 is connected to the other end of the twenty-eighth resistor R28.

[0086] As one possible implementation method, Figure 14 This is a schematic diagram of the first step-down module in the dual power supply switching control device provided in this application, with reference to... Figure 14As shown, the first step-down module includes: resistors R29 (29th), R30 (30th), R31 (31st), R32 (32nd), R33 (33rd), R34 (34th), R35 (35th), R36 (36th), R37 (37th), and R38 (38th); capacitors C9 (9th), C10 (10th), C11 (11th), C12 (12th), C13 (13th), C14 (14th), C15 (15th), C16 (16th), and C17 (17th); diodes D5 (5th), D6 (6th), D7 (7th), and D8 (8th); transformer T; switching chip U1; optocoupler switch U2; and operational amplifier U3.

[0087] One end of the twenty-ninth resistor R29 is connected to the output terminal of the first rectifier module, one end of the thirtieth resistor R30, one end of the ninth capacitor C9, the first terminal of the transformer T, one end of the tenth capacitor C10, and one end of the eleventh capacitor C11. The other end of the twenty-ninth resistor R29 is connected to the other end of the thirtieth resistor R30, the other end of the ninth capacitor C9, and one end of the fifth diode D5.

[0088] The other end of the fifth diode D5 is connected to the second end of the transformer T and the first end of the switching chip U1. The second end of the switching chip U1 is connected to one end of the thirty-first resistor R31, and the other end of the thirty-first resistor R31 is grounded.

[0089] The third terminal of switch chip U1 is connected to one end of the thirty-second resistor R32 and one end of the fourteenth capacitor C14. The fourth terminal of switch chip U1 is connected to one end of the fifteenth capacitor C15 and the fourth terminal of optocoupler switch U2. The fifth terminal of switch chip U1 is connected to the other end of the fifteenth capacitor C15 and the third terminal of optocoupler switch U2. The other end of the fourteenth capacitor C14 is grounded.

[0090] The other end of the 32 resistor is connected to one end of the seventh diode D7, and the other end of the seventh diode D7 is connected to the fourth terminal of the transformer T. The third terminal of the transformer T is grounded.

[0091] The other end of the tenth capacitor C10 is connected to the other end of the eleventh capacitor C11, the sixth terminal of the transformer T, one end of the thirteenth capacitor C13, one end of the sixteenth capacitor C16, and one end of the thirty-fourth resistor R34. One end of the thirty-fourth resistor R34 is also grounded.

[0092] The fifth terminal of transformer T is connected to one end of the sixth diode D6 and one end of the thirty-third resistor R33. The other end of the sixth diode D6 is connected to one end of the thirty-fifth resistor R35, one end of the thirty-sixth resistor R36, the other end of the thirteenth capacitor C13, one end of the twelfth capacitor C12, the other end of the sixteenth capacitor C16, the other end of the thirty-fourth resistor R34, and one end of the eighth diode D8. The other end of the eighth diode D8 is connected to the second terminal of the controller, and the other end of the thirty-third resistor R33 is connected to the other end of the twelfth capacitor C12.

[0093] The other end of the thirty-fifth resistor R35 is connected to the first end of the optocoupler switch U2 and one end of the thirty-seventh resistor R37. The other end of the thirty-sixth resistor R36 is connected to the first end of the operational amplifier U3, one end of the thirty-eighth resistor R38, and one end of the seventeenth capacitor C17. The other end of the seventeenth capacitor C17 is connected to the other end of the thirty-seventh resistor R37, the second end of the optocoupler switch U2, and the third end of the operational amplifier U3.

[0094] The second terminal of operational amplifier U3 is connected to the other terminal of the thirty-eighth resistor R38, which is also grounded.

[0095] In this circuit, the first terminal of operational amplifier U3 is the output terminal, the second terminal of operational amplifier U3 is the inverting input terminal, and the third terminal of operational amplifier U3 is the non-inverting input terminal.

[0096] In this device, the first terminal of the optocoupler switch U2 is the anode, the second terminal is the cathode, the third terminal is the emitter, and the fourth terminal is the collector.

[0097] As one possible implementation method, Figure 15 This is another structural schematic diagram of the dual power supply switching control device provided in this application, referred to... Figure 15 As shown, in Figure 1 In addition to this, it also includes: a configurable relay output unit.

[0098] The configurable relay output unit includes a first output module and a second output module.

[0099] The first end of the first output module is connected to the first power supply, and the second end of the first output module is connected to an external mechanism; the first end of the second output module is connected to the second power supply, and the second end of the second output module is connected to an external mechanism.

[0100] Optionally, the first output module and the second output module can also disconnect and close the power supply from the first power supply and the second power supply to the external mechanism.

[0101] The first output module and the second output module have the same circuit structure. The following explanation will take the first output module as an example.

[0102] As one possible implementation method, Figure 16 This is another structural schematic diagram of the dual power supply switching control device provided in this application, with reference to... Figure 16 As shown, the first output module includes a first variable resistor RM1. One end of the first variable resistor RM1 is connected to a first power supply, and the other end of the first variable resistor RM1 is connected to an external mechanism.

[0103] As one possible implementation method, Figure 17 This is another structural schematic diagram of the dual power supply switching control device provided in this application, with reference to... Figure 17 As shown, when the driving voltage of the external mechanism is a three-phase three-wire voltage, one end of the first variable resistor RM1 is connected to the C phase of the first power supply, and the other end of the first variable resistor RM1 is connected to the external mechanism.

[0104] As one possible implementation method, Figure 18 This is another structural schematic diagram of the dual power supply switching control device provided in this application, with reference to... Figure 18 As shown, when the driving voltage of the external mechanism is a three-phase four-wire voltage, one end of the first variable resistor RM1 is connected to the N phase of the first power supply, and the other end of the first variable resistor RM1 is connected to the external mechanism.

[0105] As one possible implementation method, Figure 19 This is a schematic diagram of the first hardware structure of the dual power supply switching control device provided in this application. Figure 20 This is a schematic diagram of a second hardware structure for the dual power supply switching control device provided in this application, with reference to... Figure 19 as well as Figure 20 As shown, the configurable voltage sampling unit and controller are mounted on the first circuit board, and the power supply unit is mounted on the second circuit board.

[0106] The projected area of ​​the second circuit board is smaller than that of the first circuit board, and the second circuit board is stacked on the first circuit board, wherein the projection direction is the stacking direction of the first circuit board and the second circuit board.

[0107] Optionally, the second circuit board can be fixed to the first circuit board by soldering, and short-distance traces can be achieved through 2-pin terminals to improve circuit stability, optimize space volume, and facilitate the reuse of power supply modules.

[0108] Optionally, the controller may also include a programmable input / output module. The input port supports seven function modes, including fire signal, external fault signal and manual switching command; the output port supports more than 30 programmable modes, including generator start / stop, load switching delay and fault type indication.

[0109] Optionally, the controller may also include a fire alarm input circuit, employing optocoupler isolation and supporting voltage input and dry contact input. Specifically, the fire alarm input circuit includes an optocoupler switch. The input terminal of the fire alarm input circuit is used to receive a fire alarm signal. The optocoupler switch in the fire alarm input circuit is turned on under the action of the input fire alarm signal and inputs a priority signal to the controller. This priority signal is used to cut off all power supplies.

[0110] Optionally, the controller may also include a temperature and humidity detection module, which is connected to a communication and host computer to monitor the status of the input and load terminals in real time.

[0111] Optionally, the controller may also include an EEPROM storage module.

[0112] Optionally, the controller may also include an alarm module. It has built-in over / under voltage detection units, phase sequence detection units, phase angle detection units, over / under frequency detection units, and phase loss detection units. It can be linked with the fire protection module and the alarm mode can be configured through the programmable output module.

[0113] Optionally, the controller may also include dual-channel 485 communication circuits and CAN communication circuits, dual independent 485 communication interfaces and one CAN communication interface, supporting multiple industrial protocols, and recording communication configuration parameters through an EEPROM storage module.

[0114] Optionally, the controller may also include LED indicator circuitry, including power status indicator, fault alarm indicator, contact status indicator, manual / automatic indicator, and controller status indicator.

[0115] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dual-power switching control device, characterized in that, include: Configurable voltage sampling unit, power supply unit, and controller; The first input terminal of the configurable voltage sampling unit is used to connect to a first power supply, the second input terminal of the configurable voltage sampling unit is used to connect to a second power supply, and the output terminal of the configurable voltage sampling unit is connected to the first terminal of the controller; The first input terminal of the power supply unit is used to connect to a first power source, the second input terminal of the power supply unit is used to connect to a second power source, the output terminal of the power supply unit is connected to the second terminal of the controller to supply power to the controller, and the third terminal of the controller is connected to an external mechanism. The configurable voltage sampling unit includes a first variable circuit and a second variable circuit. Both the first variable circuit and the second variable circuit are connected to a first terminal of the controller. The first variable circuit is connected to the first power supply, and the second variable circuit is connected to the second power supply. The first variable circuit and / or the second variable circuit perform voltage sampling when powered on and transmit the sampling result to the controller. The first variable circuit and the second variable circuit have different resistor connection methods when the power supply mode is different.

2. The dual power supply switching control device according to claim 1, characterized in that, The configurable voltage sampling unit further includes multiple operational amplifier submodules; the first variable circuit and the second variable circuit are respectively connected to at least one corresponding operational amplifier submodule.

3. The dual power supply switching control device according to claim 2, characterized in that, When the first power supply and the second power supply are two-phase power supplies, the first variable circuit includes: a first resistor, a second resistor, an eleventh resistor, and a twelfth resistor; One end of the first resistor is used to connect to phase A of the first power supply, the other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is connected to at least one corresponding operational amplifier submodule. One end of the eleventh resistor is used to connect to the N phase of the first power supply, the other end of the eleventh resistor is connected to one end of the twelfth resistor, and the other end of the twelfth resistor is connected to at least one corresponding operational amplifier submodule.

4. The dual power supply switching control device according to claim 3, characterized in that, The configurable voltage sampling unit includes: a first operational amplifier submodule; The other end of the second resistor is connected to the first input terminal of the first operational amplifier submodule, the other end of the twelfth resistor is connected to the second input terminal of the first operational amplifier submodule, and the output terminal of the first operational amplifier submodule is connected to the first terminal of the controller.

5. The dual power supply switching control device according to claim 2, characterized in that, When the first power supply and the second power supply are three-phase three-wire power supplies, the first variable circuit includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a ninth resistor, a tenth resistor, a thirteenth resistor, a fourteenth resistor, a seventeenth resistor, and an eighteenth resistor; One end of the first resistor is used to connect to phase A of the first power supply, the other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is connected to at least one corresponding operational amplifier submodule. One end of the fifth resistor is used to connect to phase A of the first power supply, the other end of the fifth resistor is connected to one end of the sixth resistor, and the other end of the sixth resistor is connected to at least one corresponding operational amplifier submodule. One end of the third resistor is used to connect to phase B of the first power supply, and the other end of the third resistor is connected to one end of the fourth resistor. The other end of the fourth resistor is connected to at least one corresponding operational amplifier submodule. One end of the seventeenth resistor is used to connect to phase B of the first power supply, the other end of the seventeenth resistor is connected to one end of the eighteenth resistor, and the other end of the eighteenth resistor is connected to at least one corresponding operational amplifier submodule. One end of the ninth resistor is used to connect to the C phase of the first power supply, the other end of the ninth resistor is connected to one end of the tenth resistor, and the other end of the tenth resistor is connected to at least one corresponding operational amplifier submodule. One end of the thirteenth resistor is used to connect to phase C of the first power supply, the other end of the thirteenth resistor is connected to one end of the fourteenth resistor, and the other end of the fourteenth resistor is connected to at least one corresponding operational amplifier submodule.

6. The dual power supply switching control device according to claim 5, characterized in that, The configurable voltage sampling unit includes: a first operational amplifier submodule, a second operational amplifier submodule, and a third operational amplifier submodule; The other end of the second resistor is connected to the first input terminal of the first operational amplifier submodule, and the other end of the tenth resistor is connected to the second input terminal of the first operational amplifier submodule; The other end of the fourth resistor is connected to the first input terminal of the second operational amplifier submodule, and the other end of the fourteenth resistor is connected to the second input terminal of the second operational amplifier submodule. The other end of the sixth resistor is connected to the first input terminal of the third operational amplifier submodule, and the other end of the eighteenth resistor is connected to the second input terminal of the third operational amplifier submodule; The output terminals of the first operational amplifier submodule, the second operational amplifier submodule, and the third operational amplifier submodule are connected to the first terminal of the controller.

7. The dual power supply switching control device according to claim 2, characterized in that, When the first power supply and the second power supply are three-phase four-wire power supplies, the first variable circuit includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a seventh resistor, an eighth resistor, an eleventh resistor, a twelfth resistor, a fifteenth resistor, a sixteenth resistor, a nineteenth resistor, and a twentieth resistor; One end of the first resistor is used to connect to phase A of the first power supply, the other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is connected to at least one corresponding operational amplifier submodule. One end of the third resistor is used to connect to phase B of the first power supply, and the other end of the third resistor is connected to one end of the fourth resistor. The other end of the fourth resistor is connected to at least one corresponding operational amplifier submodule. One end of the seventh resistor is used to connect to the C phase of the first power supply, the other end of the seventh resistor is connected to one end of the eighth resistor, and the other end of the eighth resistor is connected to at least one corresponding operational amplifier submodule. One end of the eleventh resistor is used to connect to the N phase of the first power supply, the other end of the eleventh resistor is connected to one end of the twelfth resistor, and the other end of the twelfth resistor is connected to at least one corresponding operational amplifier submodule. One end of the fifteenth resistor is used to connect to the N phase of the first power supply, the other end of the fifteenth resistor is connected to one end of the sixteenth resistor, and the other end of the sixteenth resistor is connected to at least one corresponding operational amplifier submodule. One end of the nineteenth resistor is used to connect to the N phase of the first power supply, the other end of the nineteenth resistor is connected to one end of the twentieth resistor, and the other end of the twentieth resistor is connected to at least one corresponding operational amplifier submodule.

8. The dual power supply switching control device according to claim 7, characterized in that, The configurable voltage sampling unit includes: a first operational amplifier submodule, a second operational amplifier submodule, and a third operational amplifier submodule; The other end of the second resistor is connected to the first input terminal of the first operational amplifier submodule, and the other end of the twelfth resistor is connected to the second input terminal of the first operational amplifier submodule; The other end of the fourth resistor is connected to the first input terminal of the second operational amplifier submodule, and the other end of the sixteenth resistor is connected to the second input terminal of the second operational amplifier submodule. The other end of the eighth resistor is connected to the first input terminal of the third operational amplifier submodule, and the other end of the twentieth resistor is connected to the second input terminal of the third operational amplifier submodule; The output terminals of the first operational amplifier submodule, the second operational amplifier submodule, and the third operational amplifier submodule are connected to the first terminal of the controller.

9. The dual power supply switching control device according to claim 1, characterized in that, The power supply unit includes: a first power supply module and / or a second power supply module; The input terminal of the first power supply module is used to connect to the first power source, and the output terminal of the first power supply module is connected to the second terminal of the controller; The input terminal of the second power supply module is used to connect to the second power source, and the output terminal of the second power supply module is connected to the second terminal of the controller.

10. The dual power supply switching control device according to claim 9, characterized in that, The first power supply module includes: a first rectifier module and a first step-down module; The input terminal of the first rectifier module is used to connect to the first power supply, the output terminal of the first rectifier module is connected to the input terminal of the first step-down module, and the output terminal of the first step-down module is connected to the second terminal of the controller.

11. The dual power supply switching control device according to claim 10, characterized in that, The first rectifier module includes: a first inductor, a second inductor, a first potentiometer, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a first diode, a second diode, a third diode, a fourth diode, a first common-mode inductor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, and a twenty-eighth resistor; One end of the first inductor and one end of the second inductor are used to connect to one end of the first power supply. The other end of the first inductor is connected to one end of the first potentiometer, one end of the fifth capacitor, one end of the first diode, and one end of the third diode. The other end of the second inductor is connected to the other end of the first potentiometer, one end of the sixth capacitor, one end of the fourth diode, and one end of the second diode. The other end of the fifth capacitor is connected to the other end of the sixth capacitor. The other end of the first diode is connected to the other end of the second diode and the first end of the first common-mode inductor; the other end of the third diode is connected to the other end of the fourth diode and the second end of the first common-mode inductor. The third terminal of the first common-mode inductor is connected to one terminal of the seventh capacitor, one terminal of the twenty-fifth resistor, and the input terminal of the first buck module; the fourth terminal of the first common-mode inductor is connected to one terminal of the eighth capacitor and one terminal of the twenty-eighth resistor. The other end of the seventh capacitor is connected to the other end of the eighth resistor, one end of the twenty-sixth resistor, and one end of the twenty-seventh resistor. The other end of the twenty-fifth resistor is connected to the other end of the twenty-sixth resistor, and the other end of the twenty-seventh resistor is connected to the other end of the twenty-eighth resistor.

12. The dual power supply switching control device according to claim 10, characterized in that, The first step-down module includes: a 29th resistor, a 30th resistor, a 31st resistor, a 32nd resistor, a 33rd resistor, a 34th resistor, a 35th resistor, a 36th resistor, a 37th resistor, a 38th resistor, a 9th capacitor, a 10th capacitor, an 11th capacitor, a 12th capacitor, a 13th capacitor, a 14th capacitor, a 15th capacitor, a 16th capacitor, a 17th capacitor, a 5th diode, a 6th diode, a 7th diode, an 8th diode, a transformer, a switching chip, an optocoupler switch, and an operational amplifier; One end of the 29th resistor is connected to the output terminal of the first rectifier module, one end of the 30th resistor, one end of the 9th capacitor, the first terminal of the transformer, one end of the 10th capacitor, and one end of the 11th capacitor. The other end of the 29th resistor is connected to the other end of the 30th resistor, the other end of the 9th capacitor, and one end of the 5th diode. The other end of the fifth diode is connected to the second end of the transformer and the first end of the switching chip. The second end of the switching chip is connected to one end of the thirty-first resistor, and the other end of the thirty-first resistor is grounded. The third terminal of the switching chip is connected to one end of the thirty-second resistor and one end of the fourteenth capacitor; the fourth terminal of the switching chip is connected to one end of the fifteenth capacitor and the fourth terminal of the optocoupler switch; the fifth terminal of the switching chip is connected to the other end of the fifteenth capacitor and the third terminal of the optocoupler switch; and the other end of the fourteenth capacitor is grounded. The other end of the 32 resistor is connected to one end of the seventh diode, the other end of the seventh diode is connected to the fourth terminal of the transformer, and the third terminal of the transformer is grounded; The other end of the tenth capacitor is connected to the other end of the eleventh capacitor, the sixth terminal of the transformer, one end of the thirteenth capacitor, one end of the sixteenth capacitor, and one end of the thirty-fourth resistor. One end of the thirty-fourth resistor is also grounded. The fifth terminal of the transformer is connected to one end of the sixth diode and one end of the thirty-third resistor. The other end of the sixth diode is connected to one end of the thirty-fifth resistor, one end of the thirty-sixth resistor, one end of the thirteenth capacitor, one end of the twelfth capacitor, one end of the sixteenth capacitor, one end of the thirty-fourth resistor, and one end of the eighth diode. The other end of the eighth diode is connected to the second terminal of the controller. The other end of the thirty-third resistor is connected to the other end of the twelfth capacitor. The other end of the thirty-fifth resistor is connected to the first end of the optocoupler switch and one end of the thirty-seventh resistor; the other end of the thirty-sixth resistor is connected to the first end of the operational amplifier, one end of the thirty-eighth resistor and one end of the seventeenth capacitor; and the other end of the seventeenth capacitor is connected to the other end of the thirty-seventh resistor, the second end of the optocoupler switch and the third end of the operational amplifier. The second terminal of the operational amplifier is connected to the other terminal of the thirty-eighth resistor, and the other terminal of the thirty-eighth resistor is also grounded.

13. The dual power supply switching control device according to claim 1, characterized in that, Also includes: Configurable relay output unit; The configurable relay output unit includes: a first output module and a second output module; The first end of the first output module is connected to the first power supply, and the second end of the first output module is connected to the external mechanism; The first end of the second output module is connected to the second power supply, and the second end of the second output module is connected to the external mechanism.

14. The dual power supply switching control device according to claim 13, characterized in that, The first output module includes: a first variable resistor; One end of the first variable resistor is connected to the first power source, and the other end of the first variable resistor is connected to the external mechanism.

15. The dual power supply switching control device according to claim 14, characterized in that, When the driving voltage of the external mechanism is a three-phase three-wire voltage, one end of the first variable resistor is connected to phase C of the first power supply, and the other end of the first variable resistor is connected to the external mechanism.

16. The dual power supply switching control device according to claim 14, characterized in that, When the driving voltage of the external mechanism is a three-phase four-wire voltage, one end of the first variable resistor is connected to the N phase of the first power supply, and the other end of the first variable resistor is connected to the external mechanism.

17. The dual power supply switching control device according to claim 1, characterized in that, The configurable voltage sampling unit and the controller are mounted on the first circuit board, and the power supply unit is mounted on the second circuit board; The projected area of ​​the second circuit board is smaller than that of the first circuit board, and the second circuit board is stacked on the first circuit board, wherein the projection direction is the stacking direction of the first circuit board and the second circuit board.

Images