A multi-path power supply device and a power supply system

Abstract

The utility model provides a kind of multiway power supply device and power supply system, it is related to circuit control technical field.In the utility model, multiple input circuits include multiple ac power supply modules, each ac power supply module is used to access the ac voltage output by corresponding ac power supply, and ac-dc conversion is carried out to ac voltage, and output dc voltage;Input selection circuit is used to generate voltage generation signal for controlling flyback topology circuit output power supply voltage, and select target ac power supply module from multiple ac power supply modules, so that target ac power supply module outputs target dc voltage based on target ac voltage output by target ac power supply;Flyback topology circuit is used to access target dc voltage, and at least one load respectively corresponding power supply voltage is output based on target dc voltage.Furthermore, while being compatible with multiple ac inputs, the circuit complexity, circuit volume and circuit design cost of the multiway power supply device are reduced.

Description

Technical Field

[0001] This utility model relates to the field of circuit control technology, and in particular to a multi-channel power supply device and power supply system. Background Technology

[0002] In multi-source AC power supply scenarios (such as energy storage distribution cabinets), multi-source power supply devices typically include different power supply circuits (or power adapters) for different AC power sources. In other words, multiple independent power supply circuits are usually integrated within the multi-source power supply device. This allows for AC power supply to different AC power sources through different power supply circuits, improving power availability while ensuring the safety of multi-source AC power supply due to electrical isolation between the different power supply circuits.

[0003] However, using the aforementioned multi-power supply device requires separate power supply circuits for different AC power sources, resulting in a significant increase in circuit design for each additional AC power source. This not only increases the circuit complexity and size of the multi-power supply device but also raises its circuit design costs.

[0004] Therefore, how to reduce the circuit complexity, size, and design cost of multi-channel power supply devices while ensuring compatibility with multiple AC inputs is an urgent problem to be solved. Summary of the Invention

[0005] This utility model provides a multi-channel power supply device and power supply system, which can reduce the circuit complexity, circuit size and circuit design cost of the multi-channel power supply device while being compatible with multiple AC inputs.

[0006] In a first aspect, embodiments of the present invention provide a multi-channel power supply device, the multi-channel power supply device comprising: a multi-input circuit, an input selection circuit, and a flyback topology circuit; wherein... The multi-input circuit includes multiple AC power supply modules. The output terminal of each AC power supply module is electrically connected to the input terminal of the flyback topology circuit. Each AC power supply module is used to connect to the AC voltage output by the corresponding AC power source and to convert the AC voltage to DC voltage. The output terminal of the input selection circuit is electrically connected to the control terminal of the flyback topology circuit. The input selection circuit is used to generate a voltage generation signal for controlling the output supply voltage of the flyback topology circuit, and to select a target AC power supply module from the plurality of AC power supply modules so that the target AC power supply module outputs a target DC voltage based on the target AC voltage output by the target AC power supply. The flyback topology circuit is used to receive the target DC voltage and the voltage generation signal, and output the supply voltage corresponding to at least one load based on the target DC voltage and the voltage generation signal.

[0007] Secondly, this utility model provides a power supply system, which includes: an electrical device and a multi-channel power supply device as described in the first aspect; wherein the multi-channel power supply device is used to output the power supply voltage required by the load in the electrical device.

[0008] The beneficial effects of this utility model are as follows: In the multi-channel power supply device provided in this embodiment, the input selection circuit can generate a voltage generation signal for controlling the output power supply voltage of the flyback topology circuit, and select a target AC power supply module from the multiple AC power supply modules included in the multi-channel input circuit, so that the target AC power supply module outputs a target DC voltage based on the target AC voltage output by the target AC power source; and the flyback topology circuit can receive the target DC voltage and the voltage generation signal, and output a power supply voltage corresponding to at least one load based on the target DC voltage and the voltage generation signal. Therefore, the input selection circuit allows multiple AC power supply modules to reuse the same flyback topology circuit, eliminating the need for a separate flyback topology circuit for each AC power supply module. Thus, while being compatible with multiple AC inputs, it reduces the circuit complexity, circuit size, and circuit design cost of the multi-channel power supply device. Furthermore, since the input selection circuit selects only one AC power supply module to output the DC voltage for power supply voltage generation when the multi-channel power supply device supplies power to the device, other AC power supply modules will not output DC voltage simultaneously with that module, ensuring the safety of multi-source AC power supply.

[0009] Furthermore, other features and advantages of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described herein are used to provide a further understanding of this utility model, constitute a part of this utility model, and do not constitute an improper limitation of this utility model. In the accompanying drawings: Figure 1 This is a schematic diagram of the composition structure of a multi-channel power supply device provided in an embodiment of the present utility model.

[0011] Figure 2A schematic diagram of the composition structure of another multi-channel power supply device provided in an embodiment of this utility model.

[0012] Figure 3 This is a schematic diagram of the composition structure of another multi-channel power supply device provided in an embodiment of the present utility model.

[0013] Figure 4 This is a schematic diagram of the composition structure of another multi-channel power supply device provided in an embodiment of the present utility model.

[0014] Figure 5 This is a schematic diagram of the circuit structure of a multi-channel power supply device provided in an embodiment of the present utility model.

[0015] Figure 6 This is a schematic diagram of an optional power supply system provided for an embodiment of the present utility model.

[0016] Reference numerals: 1 - Multiplex power supply device; 11 - Multiplex input circuit; 11-1 ~ 11-n - AC power supply module; 11-11 ~ 11-n1 - Switching unit; 11-12 ~ 11-n2 - Rectifier unit; 12 - Input selection circuit; 121-1 ~ 121-n - First sampling module; 122 - Control module; 123 - Second sampling module; 13 - Flyback topology circuit; 131-1 ~ 131-N - Voltage output module; 131-11 ~ 131-1N - Secondary winding; 131-21 ~ 131-2N - Diode; 131-31 ~ 131-3N - Energy storage capacitor; 132-1 - Primary winding; 132-2 - Filter capacitor; 132-3 - Switching transistor; 14-1 ~ 14-n - AC power supply; 2 - Electrical device; 21 - Electrical module; 22 - Main control module. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings. Throughout the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] To enable those skilled in the art to better understand the solutions of this utility model, 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. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the embodiments of this utility model, it should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0019] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0020] In the description of the embodiments of this utility model, the words "example" or "for example" are used to indicate exemplification, illustration, or description. Any embodiment or design described as "example" or "for example" in the embodiments of this utility model is not to be construed as being more preferred or having more advantages than another embodiment or design. The use of the words "example" or "for example" is intended to present relative concepts in a clear manner. Furthermore, "multiple" in the embodiments of this utility model refers to two or more; therefore, "multiple" can also be understood as "at least two" in the embodiments of this utility model. "At least one" can be understood as one or more, for example, one, two, or more. For example, including at least one means including one, two, or more, and is not limited to which ones are included. For example, including at least one of A, B, and C, then it can include A, B, C, A and B, A and C, B and C, or A and B and C.

[0021] It should be noted that in this embodiment of the invention, "and / or" describes the relationship between the associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the preceding and following associated objects have an "or" relationship. It should be pointed out that in this embodiment of the invention, "connection" can be understood as an electrical connection. The connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.

[0022] Furthermore, the names of the messages or information exchanged between the multiple devices in the embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0023] The design concept of this utility model embodiment is briefly introduced below: Currently, in multi-source AC power supply scenarios, multi-power supply devices typically include different power supply circuits for different AC power sources. That is, multiple independently configured power supply circuits are usually integrated within the multi-power supply device. Taking three AC power sources—grid port output, diesel generator port output, and photovoltaic inverter port output—as an example, the multi-power supply device typically integrates three independent power supply circuits.

[0024] In this way, different AC power sources can be supplied through different power supply circuits, thereby improving power availability and ensuring the safety of multi-source AC power supply due to the electrical isolation between different power supply circuits.

[0025] However, using the aforementioned multi-power supply device requires separate power supply circuits for different AC power sources, resulting in a significant increase in circuit design for each additional AC power source. This not only increases the circuit complexity and size of the multi-power supply device but also raises the circuit design cost.

[0026] In view of this, in order to solve or improve the above-mentioned problems, this utility model provides a multi-channel power supply device. See also... Figure 1As shown, the multiplex power supply device 1 may include: a multiplex input circuit 11, an input selection circuit 12, and a flyback topology circuit 13. The input terminal of the multiplex input circuit 11 can be electrically connected to the input terminal of the input selection circuit 12, the output terminal of the multiplex input circuit 11 is electrically connected to the input terminal of the flyback topology circuit 13, and the control terminal of the flyback topology circuit 13 is also electrically connected to the output terminal of the input selection circuit 12. That is, there is an electrical connection between any two circuits in the multiplex input circuit 11, the input selection circuit 12, and the flyback topology circuit 13.

[0027] The multi-input circuit 11 can be used to connect to the AC voltages output by multiple AC power sources (e.g., AC power source 14-1 ~ AC power source 14-n), and the aforementioned multiple AC voltages can be expressed as: V A.1 ~ V A.n For example, the aforementioned multiple AC power sources may include, but are not limited to: AC power output from the grid port, AC power output from the diesel generator port, and AC power output from the photovoltaic inverter port. This embodiment of the present invention does not specifically limit these sources.

[0028] Since the multiple input circuit 11 is used to connect multiple AC power sources (i.e., AC power source 14-1 ~ AC power source 14-n), therefore, as... Figure 1 As shown, the multi-input circuit 11 may include multiple AC power supply modules (i.e., AC power supply modules 11-1 to 11-n). The input terminal of each AC power supply module (e.g., AC power supply module 11-i among AC power supply modules 11-1 to 11-n) is electrically connected to the input terminal of the input selection circuit 12, and the output terminal of each AC power supply module (e.g., AC power supply module 11-i) is electrically connected to the input terminal of the flyback topology circuit 13. Each AC power supply module (e.g., AC power supply module 11-i) can be used to connect to the AC voltage (e.g., V) output from a corresponding AC power source (e.g., AC power source 14-i). A.i ), and the AC voltage (i.e. V) A.i This process performs AC-DC conversion, outputting a DC voltage (i.e., V). D.i ).

[0029] Input selection circuit 12 can be used to generate a voltage generation signal Signal.VG for controlling the output supply voltage of flyback topology circuit 13, and to select a target AC power supply module Mo.Tar (e.g., AC power supply module 11-i) from a plurality of AC power supply modules, so that the target AC power supply module Mo.Target is based on the target AC voltage V output by the target AC power supply Power.S.Tar (e.g., AC power supply 14-i). A.Tar (e.g., V) A.i Output target DC voltage V D.Tar(e.g., V) D.i The voltage generation signal Signal.VG can also be understood as the enable signal for the flyback topology circuit 13.

[0030] It should be noted that the target AC power supply module Mo.Tar can be randomly selected from multiple AC power supply modules (i.e., AC power supply modules 11-1 to AC power supply modules 11-n), or it can be selected from multiple AC power supply modules based on set rules or user requirements. This embodiment of the utility model does not limit this.

[0031] The flyback topology circuit 13 can be used to connect to the target DC voltage V. D.Tar And the voltage generation signal Signal.VG, based on the target DC voltage V D.Tar The voltage generation signal Signal.VG outputs the supply voltage corresponding to at least one load, which can be expressed as follows: V S.1 ~ V S.n In other words, although the flyback topology circuit 13 is only connected to a single DC voltage (i.e., the target DC voltage V), D.Tar However, it can output one or multiple outputs, meaning it can output at least one supply voltage.

[0032] Furthermore, the flyback topology 13 can be mainly divided into two types: continuous current mode and discontinuous current mode. The core difference lies in whether the secondary winding current flows continuously during the conduction of the switching transistor. The flyback topology 13 can also be classified into boost type, buck type, and buck-boost type according to the output voltage characteristics (achieved by adjusting the transformer turns ratio).

[0033] based on Figure 1 The multi-channel power supply device 1 shown includes an input selection circuit 12 that generates a voltage generation signal Signal.VG to control the output supply voltage of the flyback topology circuit 13, and selects a target AC power supply module Mo.Target from a plurality of AC power supply modules included in the multi-channel input circuit 11, so that the target AC power supply module Mo.Target is based on the target AC voltage V output by the target AC power supply Power.S.Tar. A.Tar Output target DC voltage V D.Tar Furthermore, the flyback topology 13 can be connected to the target DC voltage V. D.Tar And the voltage generation signal Signal.VG, based on the target DC voltage V D.Tar The voltage generation signal Signal.VG outputs the supply voltage (i.e., V) corresponding to at least one load. S.1 ~ V S.n ).

[0034] Therefore, the input selection circuit 12 allows multiple AC power supply modules to reuse the same flyback topology circuit, eliminating the need for a separate flyback topology circuit for each AC power supply module. This reduces the circuit complexity, size, and design cost of the multi-source power supply device 1 while maintaining compatibility with multiple AC inputs. Furthermore, since the input selection circuit 12 selects only one AC power supply module to output the DC voltage for power supply voltage generation when the multi-source power supply device 1 supplies power to the device, other AC power supply modules will not output DC voltage simultaneously with this module. This ensures the safety of multi-source AC power supply and also reduces electromagnetic compatibility (EMC) interference between the input terminals of multiple AC power supply modules to a certain extent.

[0035] In one alternative implementation, see [link to relevant documentation]. Figure 2 As shown, the input selection circuit 12 may include: multiple first sampling modules (e.g., first sampling module 121-1 ~ first sampling module 121-n) and a control module 122.

[0036] Among them, multiple first sampling modules (i.e., first sampling modules 121-1 ~ first sampling modules 121-n) correspond one-to-one with multiple AC power supply modules (i.e., AC power supply modules 11-1 ~ AC power supply modules 11-n). That is, for each AC power supply module (e.g., AC power supply module 11-i), a first sampling module (e.g., the first sampling module 121-i among the first sampling modules 121-1 ~ first sampling modules 121-n) is set up. Each first sampling module is electrically connected to the input terminal of the corresponding AC power supply module and the first input terminal of the control module 122.

[0037] Each first sampling module (e.g., first sampling module 121-i) can be used to sample the voltage at the input terminal of the corresponding AC power supply module (e.g., first sampling module 121-i) to obtain a first sampling signal Signal.Sam.1.i. Thus, the first sampling signals corresponding to multiple first sampling modules (i.e., first sampling modules 121-1 ~ first sampling modules 121-n) can be represented sequentially as: Signal.Sam.1.1 ~ Signal.Sam.1.n. It should be understood that each first sampling signal can be used to indicate whether the corresponding AC power supply provides AC voltage, i.e., whether AC input exists.

[0038] The control module 122 can be used to select at least one AC power supply module (e.g., AC power supply module 11-1 ~ AC power supply module 11-m, where 1 ≤ m ≤ n) from a plurality of AC power supply modules based on the first sampling signals corresponding to the plurality of first sampling modules respectively, and to select a target AC power supply module Mo.Target from the at least one AC power supply module. Optionally, the control module 122 can be a microcontroller unit (MCU).

[0039] Based on the above method, by using multiple first sampling signals (i.e., Signal.Sam.1.1 ~ Signal.Sam.1.n), at least one AC power supply module with AC input can be quickly determined from multiple AC power supply modules, thereby improving the speed or efficiency of selecting the target AC power supply module Mo.Target from at least one AC power supply module.

[0040] In one alternative implementation, see [link to relevant documentation]. Figure 3 As shown, each AC power supply module (i.e., any one AC power supply module 11-i from AC power supply module 11-1 to AC power supply module 11-n) may include: a switching unit (i.e., any one switching unit 11-i1 from switching unit 11-11 to switching unit 11-n1) and a rectifier unit (i.e., any one rectifier unit 11-i2 from rectifier unit 11-12 to switching unit 11-n2). Each switching unit is connected between the corresponding AC power supply and the corresponding rectifier unit. The control terminal of the switching unit is electrically connected to the first output terminal of the control module 122. That is, each switching unit is electrically connected to the output terminal of the corresponding AC power supply, the input terminal of the corresponding rectifier unit, and the first output terminal of the control module 122, respectively. Each switching unit is disposed on the power supply line between the corresponding rectifier unit and the corresponding AC power supply.

[0041] Optional, such as Figure 3 As shown, each rectifier unit has two power supply lines (e.g., a positive power supply line and a negative power supply line) between it and the corresponding AC power source. Each power supply line has a switch. For example, switch unit 11-11 may include switch K-11 and switch K-12. It should be understood that the switch unit may also be called a relay. Furthermore, the initial state of the switch unit is either closed or closed, that is, the switch unit is in a normally closed state.

[0042] A switching unit (e.g., switching unit 11-i1) can be used to disconnect or connect the power supply line between the rectifier unit (e.g., rectifier unit 11-i2) and the corresponding AC power supply (e.g., AC power supply 14-i) based on the control signal from the control module 122. The rectifier unit (e.g., rectifier unit 11-i2) can be used to output the AC voltage (e.g., V) to the corresponding AC power supply when the switching unit connects the power supply line (i.e., the switching unit is in the closed state). A.i This performs AC-DC conversion and outputs a DC voltage (e.g., V). D.i Optionally, the rectifier unit included in the switching unit can be a half-wave rectifier, a fully rectified rectifier, or a bridge rectifier, etc., and this embodiment of the present invention does not specifically limit it in this regard.

[0043] At this time, the control module 122 can also be used to generate a first control signal Signal.C.1 after selecting a target AC power supply module Mo.Target from at least one AC power supply module. The first control signal Signal.C.1 can be used to control the switching units included in each of the at least one AC power supply modules (excluding the target AC power supply module Mo.Target) to open, and to control the switching units included in the target AC power supply module Mo.Target to close.

[0044] In this way, the multi-source power supply device 1 supplies power to the load only through the target AC power supply module Mo.Target and the flyback topology circuit 13, ensuring the safety of multi-source AC power supply. It should be noted that if the switching unit is in the closed state by default, the first control signal Signal.C.1 can be used only to control the switching units of each AC power supply module other than the target AC power supply module Mo.Target to be disconnected.

[0045] To prevent the multi-power supply unit 1 from failing to operate based on the target DC voltage V due to an anomaly in the target AC power module Mo.Target or the target AC power source Power.S.Tar, D.Tar The problem involves outputting the supply voltage corresponding to at least one load. In an alternative implementation, the control module 122 can also be used to stop outputting the target AC voltage V at the target AC power source Power.S.Tar. A.Tar At that time, a second control signal Signal.C.2 is generated. This second control signal Signal.C.2 can be used to control the closing of a switching unit within one of the aforementioned AC power supply modules.

[0046] Based on the above method, when the target AC power supply Power.S.Tar malfunctions or fails, the AC power supply and AC power module can be quickly switched, that is, the AC power supply that can provide AC voltage (or AC input) can be selected, ensuring that the multi-power supply device 1 can still work stably and reliably.

[0047] Optionally, the control module 122 can also generate a second control signal Signal.C.2 when the switching unit included in the target AC power supply module Mo.Target is disconnected. This allows for rapid switching between the AC power supply and the AC power supply module when the target AC power supply module Mo.Target malfunctions or fails; that is, selecting an AC power supply capable of providing AC voltage and whose corresponding AC power supply module is functioning correctly, ensuring that the multi-power supply device 1 can still operate stably and reliably.

[0048] See Figure 4 As shown, the flyback topology circuit 13 in the multi-power supply device 1 is electrically connected to the power consumption module 21 in the power consumption device 2 to enable the multi-power supply device 1 to charge the power consumption module 21; and the control module 122 in the multi-power supply device 1 is communicatively connected to the main control module 22 in the power consumption device 2 to ensure that the user can obtain the actual working status of the multi-power supply device 1 in a timely manner and enhance the user's control over the multi-power supply device 1.

[0049] Optionally, the control module 122 and the main control module 22 can exchange information via a communication network. The communication network can employ wireless or wired communication methods. For example, the control module 122 can access the network and communicate with the main control module 22 via cellular mobile communication technology. This cellular mobile communication technology can include 5G (5th generation mobile networks) or next-generation mobile communication technology. Alternatively, the control module 122 can access the network and communicate with the main control module 22 via short-range wireless communication. This short-range wireless communication method can include Wi-Fi (wireless fidelity) technology.

[0050] Furthermore, the power module 21 and the main control module 22 can also exchange information via wireless or wired communication, and this utility model does not specifically limit this.

[0051] Therefore, in one optional implementation, the control module 122 can also be used to send multiple first sampling signals to the power-consuming device 2 (or the main control module 22), receive a first indication signal Signal.Ind.1 returned by the power-consuming device 2 (or the main control unit 22) based on the multiple first sampling signals, and select a target AC power supply module Mo.Target from at least one AC power supply module and generate a first control signal Signal.C.1 based on the first indication signal Signal.Ind.1.

[0052] Optionally, the control module 122 can also be used to send a second indication signal Signal.Ind.2 to the electrical device 2 (or the main control unit 22), receive a third indication signal Signal.Ind.3 returned by the electrical device 2 (or the main control unit 22) based on the second indication signal Signal.Ind.2, and generate a second control signal Signal.C.2 based on the third indication signal Signal.Ind.3. The second indication signal Signal.Ind.2 can be used to instruct the target AC power supply Power.S.Tar to stop outputting the target AC voltage V. A.Tar Alternatively, the switching unit included in the target AC power supply module Mo.Target may be disconnected.

[0053] Optionally, the user can use an application (APP) connected to the power supply device 2 to realize information interaction between the user device 2 and the multiple power supply device 1. In other words, the user can select a target AC power supply module Mo.Target from at least one AC power supply module through operations on the APP, and the user device 1 can also report the real-time working status of the multiple power supply device 1 to the APP through communication.

[0054] In one alternative implementation, see [link to relevant documentation]. Figure 5 As shown, the output terminal of the flyback topology circuit 13 may include at least one voltage output module (e.g., voltage output module 131-1 to voltage output module 131-N). Each voltage output module (e.g., any one of voltage output modules 131-1 to voltage output module 131-N) can be used based on a target DC voltage V. D.Tar Output the corresponding power supply voltage.

[0055] Still Figure 5As shown, the input terminal of the flyback topology circuit 13 may include: a first closed loop consisting of a primary winding 132-1, a filter capacitor 132-2, and a switching transistor 132-3. The control terminal of the switching transistor 132-3 is electrically connected to the second output terminal of the control module 122. Each voltage output module may include: a second closed loop consisting of a secondary winding (e.g., any one of the secondary windings 131-1i from secondary windings 131-11 to secondary windings 131-1N), a diode (e.g., any one of the diodes 131-2i from diodes 131-21 to diodes 131-2N), and an energy storage capacitor (e.g., any one of the energy storage capacitors 131-3i from energy storage capacitors 131-31 to energy storage capacitors 131-3N).

[0056] It should be understood that the present invention does not specifically limit the types of electrical components included in the input and output terminals of the flyback topology circuit 13. For example, the switching transistors 132-3 can be N-channel metal-oxide-semiconductor field-effect transistors (MOSFETs).

[0057] In one alternative implementation, it is still as follows Figure 5 As shown, the input selection circuit 12 may further include a second sampling module 123. The second sampling module 123 is electrically connected to the output terminals of the plurality of diodes and the second input terminal of the control module 122. The second sampling module 123 can be used to sample the voltage of the plurality of second closed loops to obtain a second sampling signal Signal.Sam.2. That is, the second sampling signal Signal.Sam.2 can be used to indicate the supply voltage output by at least one voltage output module.

[0058] At this time, the control module 122 can also be used to ensure that the loop voltage of the second closed loop of the target, indicated by the second sampling signal Signal.Sam.2, is not the target supply voltage V. S.Tar At that time, based on the target supply voltage V S.Tar The duty cycle is determined, and a third control signal Signal.C.3 is generated based on the duty cycle to control the switching transistor 132-3, so that the target second closed loop outputs the target supply voltage V. S.Tar The target second closed loop can be any one of multiple second closed loops. At this time, the voltage generation signal Signal.VG is the third control signal Signal.C.3.

[0059] Based on the above method, through the second sampling signal Signal.Sam.2 fed back by the second sampling module 123, the control module 122 can adjust the duty cycle of the input terminal of the flyback topology circuit 13 in a timely manner to control the switching transistor 132-3, so as to ensure that the output terminal of the flyback topology circuit 13 can output the target supply voltage V required by the corresponding load. S.Tar .

[0060] In summary, the multi-channel power supply device provided in this embodiment of the invention allows multiple AC power supply modules to reuse the same flyback topology circuit through the input selection circuit. This eliminates the need for a separate flyback topology circuit for each AC power supply module, reducing the circuit complexity, size, and design cost while maintaining compatibility with multiple AC inputs (i.e., enabling automatic switching between inputs). Furthermore, because the input selection circuit selects only one AC power supply module to output the DC voltage for power supply voltage generation when the multi-channel power supply device is supplying power to the device, other AC power supply modules will not simultaneously output DC voltage, ensuring the safety of multi-source AC power supply.

[0061] This utility model provides a power supply system. (See attached document.) Figure 6 As shown, the power supply system X may include: Figure 1-5 The diagram shows a multi-channel power supply device 1 and a power-consuming device 2. The multi-channel power supply device 1 is electrically connected to the power-consuming device 2, and can be used to output the power supply voltage required by the load (i.e., power module 21) in the power-consuming device 2. In other words, in... Figure 6 In the power supply system X shown, the multi-channel power supply device 1 can be connected to multiple AC power sources and select one of the multiple AC power sources to output the power supply voltage required by the load, which can meet the charging needs of multiple inputs and multiple outputs.

[0062] In an optional implementation, the power supply device 2 may further include a control circuit Circuit.C (i.e., main control module 22) communicatively connected to the multi-channel power supply device 1. The control circuit Circuit.C can receive multiple first sampling signals (e.g., Signal.Sam.1.1 ~ Signal.Sam.1.n) sent by the control module 122 in the multi-channel power supply device 1, and generate a first indication signal Signal.Ind.1 based on the multiple first sampling signals. At this time, the control module 122 can select a target AC power supply module from at least one AC power supply module based on the first indication signal Signal.Ind.1 and generate a first control signal Signal.C.1. The first control signal Signal.C.1 can be used to control the switching units of each AC power supply module (excluding the target AC power supply module Mo.Target) to open, and to control the switching units of the target AC power supply module Mo.Target to close.

[0063] Optionally, the control circuit 122 can be used to receive the second indication signal Signal.Ind.2 sent by the control module 122, and return a third indication signal Signal.Ind.3 based on the second indication signal Signal.Ind.2. In this case, the control module 122 can be used to generate a second control signal Signal.C.2 based on the third indication signal Signal.Ind.3.

[0064] The second indicator signal, Signal.C.2, can be used to instruct the target AC power supply, Power.S.Tar, to stop outputting the target AC voltage V. A.Tar Alternatively, the switching unit included in the target AC power supply module Mo.Target may be disconnected. The second control signal Signal.C.2 can be used to control the closing of the switching unit included in one of the AC power supply modules.

[0065] Furthermore, it should be understood that the above-disclosed embodiments are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution described in the present utility model shall still fall within the scope of the present utility model.

Claims

1. A multi-channel power supply device, characterized in that, include: Multiple input circuit, input selection circuit, and flyback topology circuit; among which, The multi-input circuit includes multiple AC power supply modules. The output terminal of each AC power supply module is electrically connected to the input terminal of the flyback topology circuit. Each AC power supply module is used to connect to the AC voltage output by the corresponding AC power source and to convert the AC voltage to DC voltage. The output terminal of the input selection circuit is electrically connected to the control terminal of the flyback topology circuit. The input selection circuit is used to generate a voltage generation signal for controlling the output supply voltage of the flyback topology circuit, and to select a target AC power supply module from the plurality of AC power supply modules so that the target AC power supply module outputs a target DC voltage based on the target AC voltage output by the target AC power supply. The flyback topology circuit is used to receive the target DC voltage and the voltage generation signal, and output the supply voltage corresponding to at least one load based on the target DC voltage and the voltage generation signal.

2. The multi-channel power supply device as described in claim 1, characterized in that, The input selection circuit includes: a plurality of first sampling modules and a control module, wherein each of the plurality of first sampling modules corresponds one-to-one with the plurality of AC power supply modules, and each first sampling module is electrically connected to the input terminal of the corresponding AC power supply module and the first input terminal of the control module; wherein... Each of the first sampling modules is used to sample the voltage at the input terminal of the corresponding AC power supply module to obtain a first sampling signal; The control module is configured to, based on the first sampling signals corresponding to the plurality of first sampling modules respectively, select at least one AC power supply module that is in a power supply state from the plurality of AC power supply modules, and select the target AC power supply module from the at least one AC power supply module.

3. The multi-channel power supply device as described in claim 2, characterized in that, Each AC power supply module includes a switching unit and a rectifier unit. The switching unit is connected between the corresponding AC power supply and the rectifier unit. The control terminal of the switching unit is electrically connected to the first output terminal of the control module. The switching unit is used to disconnect or connect the power supply line between the rectifier unit and the corresponding AC power supply based on the control signal of the control module. The rectifier unit is used to convert the AC voltage output by the corresponding AC power supply to DC voltage when the switching unit connects the power supply line. The control module is further configured to generate a first control signal after selecting the target AC power supply module from the at least one AC power supply module; the first control signal is configured to control the switching unit included in each of the at least one AC power supply modules other than the target AC power supply module to open, and to control the switching unit included in the target AC power supply module to close.

4. The multi-channel power supply device as described in claim 3, characterized in that, The control module is further configured to generate a second control signal when the target AC power supply stops outputting the target AC voltage; or, when the switching unit included in the target AC power supply module is opened; wherein the second control signal is used to control the switching unit included in one of the AC power supply modules to close.

5. The multi-channel power supply device as described in claim 4, characterized in that, The control module is further configured to send the plurality of first sampling signals to the power-consuming device, receive a first indication signal returned by the power-consuming device based on the plurality of first sampling signals, and select the target AC power supply module from the at least one AC power supply module based on the first indication signal and generate the first control signal; and / or, The control module is further configured to send a second indication signal to the electrical device, receive a third indication signal returned by the electrical device based on the second indication signal, and generate a second control signal based on the third indication signal; wherein the second indication signal is used to instruct the target AC power supply to stop outputting the target AC voltage or the switching unit included in the target AC power supply module to open.

6. The multi-channel power supply device as described in claim 2, characterized in that, The output terminal of the flyback topology circuit includes: At least one voltage output module; wherein each voltage output module is used to output a corresponding supply voltage based on the target DC voltage.

7. The multi-channel power supply device as described in claim 6, characterized in that, The input terminal of the flyback topology circuit includes a first closed loop consisting of a primary winding, a filter capacitor, and a switching transistor. The control terminal of the switching transistor is electrically connected to the second output terminal of the control module. Each voltage output module includes a second closed loop consisting of a secondary winding, a diode, and an energy storage capacitor.

8. The multi-channel power supply device as described in claim 7, characterized in that, The input selection circuit further includes: The second sampling module is electrically connected to the output terminals of multiple diodes and the second input terminal of the control module. The second sampling module is used to sample the voltage of multiple second closed loops to obtain a second sampling signal. The control module is further configured to determine a duty cycle based on the target supply voltage when the loop voltage of the target second closed loop indicated by the second sampling signal is not the target supply voltage, and generate a third control signal for controlling the switching transistor based on the duty cycle, so that the target second closed loop outputs the target supply voltage; wherein the target second closed loop is any one of the plurality of second closed loops.

9. A power supply system, characterized in that, include: Electrical appliance and a multi-channel power supply device as described in any one of claims 1-8; wherein the multi-channel power supply device is used to output the power supply voltage required by the load in the electrical appliance.

10. The power supply system as described in claim 9, characterized in that, The electrical device further includes: a control circuit communicatively connected to the multi-channel power supply device; wherein... The control circuit is used to receive multiple first sampling signals sent by the control module in the multi-channel power supply device, and generate a first indication signal based on the multiple first sampling signals; The control module is configured to select a target AC power supply module from at least one AC power supply module based on the first indication signal and generate a first control signal; the first control signal is configured to control the switching units included in each of the at least one AC power supply modules other than the target AC power supply module to open, and to control the switching units included in the target AC power supply module to close. And / or, The control circuit is configured to receive a second indication signal sent by the control module and return a third indication signal based on the second indication signal; wherein the second indication signal is configured to instruct the target AC power supply to stop outputting the target AC voltage or the switching unit included in the target AC power supply module to open. The control module is used to generate a second control signal based on the third indication signal; the second control signal is used to control the closing of the switching unit included in one of the AC power supply modules.

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