Multi-path adjustable direct-current stabilized power supply

Abstract

The utility model relates to a multipath adjustable DC stabilized power supply comprising a control module and at least two DC output channels, and each DC output channel comprises a DC converter, a feedback resistor, a variable resistor and a differential analog-to-digital converter. The power input end of the direct-current converter is connected with a direct-current signal source; the power output end of the direct-current converter is connected with the input end of the load electric appliance; the feedback resistor and the variable resistor are connected in series to form an output feedback circuit, a first end of the output feedback circuit is connected with a power output end of the direct-current converter, a second end of the output feedback circuit is grounded, and one end, connected with the feedback resistor, of the variable resistor is connected with a feedback input end of the direct-current converter. The control module is connected with the control input end of the variable resistor; the input end of the differential analog-to-digital converter is connected with a load electric appliance, and the output end of the differential analog-to-digital converter is connected with the control module. The utility model can accurately obtain the voltage at the power utilization end and adjust the output voltage, thereby ensuring the voltage at the power utilization end to be stable and accurate.

Description

Technical Field

[0001] This utility model relates to the field of DC power supply technology, and in particular to a multi-channel adjustable DC regulated power supply. Background Technology

[0002] DC-DC power supplies are DC power supplies that can output single or multiple DC signals. Currently, when a DC power supply supplies power to a load appliance, it is impossible to ensure the accuracy of the actual voltage at the power consumption terminal. This is especially true when the power supply line between the DC power supply and the power consumption terminal is long, and when the voltage drop is caused by temperature changes as the power consumption time increases. In these cases, the voltage drop on the power supply line cannot be ignored. All of these situations will lead to voltage changes at the power consumption terminal, thereby affecting the operation of the load appliance. Utility Model Content

[0003] To address at least one of the aforementioned technical problems, this utility model proposes a multi-channel adjustable DC regulated power supply.

[0004] According to some embodiments of this utility model, a multi-channel adjustable DC regulated power supply is provided, including a control module and at least two DC output channels. Each DC output channel includes a DC-DC converter, a feedback resistor, a variable resistor, and a differential analog-to-digital converter (ADC). The power input terminal of the DC-DC converter is connected to a DC signal source, and the power output terminal of the DC-DC converter is connected to the input terminal of a load device. The feedback resistor and the variable resistor are connected in series to form an output feedback circuit. The first terminal of the output feedback circuit is connected to the power output terminal of the DC-DC converter, and the second terminal of the output feedback circuit is grounded. One end of the variable resistor connected to the feedback resistor is connected to the feedback input terminal of the DC-DC converter. The control module is connected to the control input terminal of the variable resistor. The input terminal of the differential ADC is connected to the input terminal of the load device, and the output terminal of the differential ADC is connected to the control module.

[0005] Based on the above scheme, the input voltage of the load appliance is sampled by a differential analog-to-digital converter. Since the current sampled by the differential analog-to-digital converter is very small, the resulting voltage drop is negligible, which can accurately obtain the voltage at the power consumption end and feed it back to the control module. The control module accurately adjusts the output voltage of the DC output channel through a variable resistor to ensure that the voltage at the power consumption end is stable and accurate, thereby ensuring the stable operation of the load appliance.

[0006] In some possible implementations, the DC output channel further includes a four-channel connector comprising two power paths and two data paths, the data paths being connected to the input of the differential analog-to-digital converter and used to acquire the input voltage of the load device.

[0007] Based on the above solution, by setting up a four-channel connector, it is easier to accurately obtain the voltage at the power supply end and reduce line errors.

[0008] In some possible implementations, the DC output channel further includes a single-ended analog-to-digital converter (ADC), the input of which is connected to the power output of the DC-DC converter, and the output of which is connected to the control module.

[0009] Based on the above scheme, by setting a single-ended analog-to-digital converter at the power output terminal of the DC-DC converter, the control module can obtain the output voltage of the DC-DC converter and compare it with the voltage at the power consumption terminal, so as to accurately adjust the output voltage of the DC-DC converter.

[0010] In some possible implementations, the DC output channel further includes a current detector, the input of which is connected to the power output of the DC converter, the first output of which is connected to the power path of the four-channel connector, and the second output of which is connected to the control module.

[0011] Based on the above scheme, the control module can obtain current parameters through the current detector, thereby obtaining the output power of the DC converter and the loss data of the line, so as to accurately adjust the output voltage and the voltage at the power consumption end.

[0012] In some possible implementations, the DC output channel also includes a fuse disposed on the connection line between the current detector and the four-channel connector.

[0013] Based on the above solution, the fuse can protect the circuit, prevent circuit damage caused by short circuits at the output terminals, and improve the safety and stability of the power supply.

[0014] In some possible implementations, the control module is a microcontroller, in which the differential analog-to-digital converter is integrated.

[0015] Based on the above scheme, configuring the control module as a microcontroller with an integrated differential analog-to-digital converter helps to simplify the circuit structure and reduce the size of the power supply.

[0016] In some possible implementations, the variable resistor is an electronic potentiometer.

[0017] Based on the above scheme, the variable resistor is configured as an electronic potentiometer. The high-precision electronic potentiometer reduces the adjustment voltage step, thereby achieving high-precision output voltage regulation.

[0018] In some possible implementations, the DC output channel further includes a cooling fan, which is connected to both the DC signal source and the control module.

[0019] Based on the above scheme, the control module can control the speed of the cooling fan according to the actual output voltage of each DC output channel, thereby achieving precise temperature control of the DC output channel.

[0020] In some possible implementations, the control module includes a wireless communication device for wirelessly connecting to an external controller.

[0021] Based on the above scheme, the control module can connect to external devices via a wireless communication device, and the external devices can set the parameter settings for each DC output channel.

[0022] In some possible implementations, the multi-channel adjustable DC regulated power supply further includes a display module, which is communicatively connected to the control module.

[0023] Based on the above solution, the display module can display parameters such as voltage, current, power, and terminal voltage of each DC output channel, making it convenient for operators to view.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the present invention.

[0025] Other features and aspects of the present invention will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions and advantages in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This diagram shows a structural block diagram of a multi-channel adjustable DC regulated power supply according to an embodiment of the present invention.

[0028] Figure 2 A first structural block diagram of a DC output channel according to an embodiment of the present invention is shown;

[0029] Figure 3 This diagram shows a second structural block diagram of a DC output channel according to an embodiment of the present invention;

[0030] Figure 4 A third structural block diagram of a DC output channel according to an embodiment of the present invention is shown;

[0031] Figure 5 This diagram shows a fourth structural block diagram of a DC output channel according to an embodiment of the present invention;

[0032] Figure 6 This diagram illustrates the operation of a multi-channel adjustable DC regulated power supply according to an embodiment of the present invention.

[0033] In the picture,

[0034] 1. Control module; 2. DC-DC converter; 3. Feedback resistor; 4. Variable resistor; 5. Differential analog-to-digital converter; 6. Four-channel connector; 7. Single-ended analog-to-digital converter; 8. Current detector; 9. Fuse; 10. Display module; 11. Controller. Detailed Implementation

[0035] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or server that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0037] Various exemplary embodiments, features, and aspects of the present invention will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0038] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0039] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0040] In this article, the term "connection" can be understood as A directly connecting to B, or A connecting to B through an intermediate component, which can be an electrical component, circuit, chip, or module, etc.

[0041] Furthermore, to better illustrate this utility model, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this utility model can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this utility model.

[0042] A DC-DC power supply is a type of DC power supply that processes input DC signals and outputs DC signals. There are many types of DC power supplies. If classified by the number of channels, they can be divided into single-output type and multi-output type; if classified by application scenario, they can be divided into buck converter, boost converter, and buck-boost converter; if classified by intelligent control function, they can be divided into fixed output type and adjustable output type (such as programmable power supply, which allows users to connect to a serial port or network to control the power supply).

[0043] Currently, although DC power supplies can meet most application scenarios, in some high-precision application scenarios, DC power supplies cannot guarantee the accuracy of the voltage at the power consumption terminal when supplying power to the load device. For example, in some test environments (high and low temperature tests, vibration tests, etc.), when the power supply line between the power supply and the power consumption terminal is long, or when the power supply line changes temperature as the power consumption time increases, resulting in voltage drop changes, the voltage drop on the power supply line cannot be ignored, causing changes in the voltage at the power consumption terminal. The above situations will lead to inaccurate measurement results and increase the complexity of the test.

[0044] To address the aforementioned technical problems, this utility model provides a multi-channel adjustable DC regulated power supply. This power supply incorporates a real-time feedback design, enabling it to acquire the voltage and current parameters of the power user in real time and feed these parameters back to the power supply. The power supply can then adjust the output voltage in real time based on the feedback results, thereby ensuring the accuracy of the voltage at the power user.

[0045] Please refer to Figures 1-2The multi-channel adjustable DC regulated power supply of this embodiment includes a control module 1 and at least two DC output channels. The DC output channels include a DC converter 2, a feedback resistor 3, a variable resistor 4, and a differential analog-to-digital converter 5.

[0046] The power input terminal of DC-DC converter 2 is connected to a DC signal source, and the power output terminal of DC-DC converter 2 is connected to the input terminal of the load device. The function of DC-DC converter 2 is to process the DC signal from the DC signal source and output a DC signal with specified parameters. The DC signal source can be a voltage source or a current source. Unless otherwise specified, the DC signal source in this embodiment is assumed to be a voltage source. Correspondingly, DC-DC converter 2 is a DC-DC voltage converter. This embodiment does not limit the specific type of DC-DC converter 2, that is, DC-DC converter 2 can be a buck converter, a boost converter, or a buck-boost converter.

[0047] Feedback resistor 3 and variable resistor 4 are connected in series to form an output feedback circuit. The first terminal of the output feedback circuit is connected to the power output terminal of DC-DC converter 2, and the second terminal is grounded. One end of variable resistor 4 connected to feedback resistor 3 is connected to the feedback input terminal of DC-DC converter 2. Control module 1 is connected to the control input terminal of variable resistor 4. The function of the output feedback circuit is to feed back the output voltage of DC-DC converter 2. Specifically, the output voltage of DC-DC converter 2 acts on the output feedback circuit. The feedback input terminal obtains the feedback voltage from the output feedback circuit, thus determining the output voltage level of DC-DC converter 2. DC-DC converter 2 compares the feedback voltage with the reference voltage and adjusts the output voltage value according to the comparison result. The feedback voltage can be changed by adjusting variable resistor 4, thereby adjusting the output voltage value.

[0048] In this invention, the positions of the feedback resistor 3 and the variable resistor 4 in the output feedback circuit are not limited. That is, the two ends of the feedback resistor 3 can be connected to the power output terminal and the feedback input terminal of the DC-DC converter 2 respectively, and one end of the variable resistor 4 can be grounded; or the two ends of the variable resistor 4 can be connected to the power output terminal and the feedback input terminal of the DC-DC converter 2 respectively, and one end of the feedback resistor 3 can be grounded.

[0049] It should be understood that the selection and location of the feedback resistor 3 and the variable resistor 4 are set according to the DC-DC converter 2. In a specific embodiment, the DC-DC converter 2 is a DC-DC chip (such as SIC437A), the two ends of the variable resistor 4 are connected to the power output terminal and the feedback input terminal of the DC-DC converter 2 respectively, one end of the feedback resistor 3 is connected to the feedback input terminal of the DC-DC converter 2, and the other end of the feedback resistor 3 is grounded.

[0050] In this invention, the specific selection of the variable resistor 4 is not limited. It should be understood that the variable resistor 4 is capable of changing its resistance value in response to the control signal sent by the control module 1; that is, the variable resistor 4 can be an electronic potentiometer or a digitally adjustable resistor. In one specific embodiment, the variable resistor 4 is configured as an electronic potentiometer (such as the AD5290, a model with 100k resistance accuracy and 256-bit adjustment), and the electronic potentiometer is connected to the control module 1 via the SPI communication protocol.

[0051] The input terminal of the differential analog-to-digital converter 5 is connected to the input terminal of the load appliance, and the output terminal of the differential analog-to-digital converter 5 is connected to the control module 1. The purpose of setting up the differential analog-to-digital converter 5 in this embodiment is to accurately obtain the voltage at the power consumption terminal. Since the current sampled by the differential analog-to-digital converter 5 is extremely small, according to Ohm's law, the voltage drop generated by the differential analog-to-digital converter 5 is negligible. That is to say, the voltage sampled by the differential analog-to-digital converter 5 is the true voltage at the input terminal of the load appliance, i.e., the accurate voltage at the power consumption terminal. By sending the voltage at the power consumption terminal to the control module 1, the control module 1 compares it with the preset channel output voltage to determine the line voltage drop and thus adjust the output voltage.

[0052] In some embodiments, please refer to Figure 4 The DC output channel also includes a four-channel connector 6, which includes two power supply paths and two data paths. The data paths are connected to the input terminal of the differential analog-to-digital converter 5, and are used to obtain the input voltage of the load device. The advantage of setting up the four-channel connector 6 is that it allows direct acquisition of the power supply voltage without damaging the circuit structure. When the DC output channel is connected to the load device through the four-channel connector 6, only the data path needs to be connected to the differential analog-to-digital converter 5 via leads.

[0053] In some embodiments, please refer to Figure 3 The DC output channel also includes a single-ended analog-to-digital converter (ADC) 7. The input terminal of the ADC 7 is connected to the power output terminal of the DC-DC converter 2, and the output terminal of the ADC 7 is connected to the control module 1. The function of the ADC 7 is to obtain the output voltage of the DC output channel. Based on the known power supply voltage and the channel's preset output voltage, combined with the actual output voltage, the accuracy of the channel's output voltage regulation can be further enhanced. Specifically, by comparing the channel's preset output voltage with the actual output voltage, a primary voltage regulation can be performed; by comparing the power supply voltage with the actual output voltage, the line voltage drop can be determined for a secondary voltage regulation. These two voltage regulation processes ensure the stability and accuracy of the power supply voltage.

[0054] It is worth noting that in this invention, the differential analog-to-digital converter 5 and the single-ended analog-to-digital converter 7 can be separate components or circuits, or they can be integrated into other devices. For example, in some cases, the control module 1 can be configured as a microcontroller with analog-to-digital conversion capabilities, i.e., the microcontroller integrates differential analog-to-digital conversion / single-ended analog-to-digital conversion functions. This configuration simplifies the circuit structure, reduces the impact of coupling interference between devices, and reduces the number of circuit leads, thus helping to reduce line losses. Specifically, when obtaining the voltage at the power consumption terminal, only one pair of leads is needed to connect the input terminal of the load appliance to the differential analog-to-digital converter port (differential ADC port) of the microcontroller. When obtaining the actual output voltage of the channel, only one lead is needed to connect the power output terminal of the DC-DC converter 2 to the single-ended analog-to-digital converter port (single-ended ADC port).

[0055] In some embodiments, please refer to Figure 3 The DC output channel also includes a current detector 8. The input terminal of the current detector 8 is connected to the power output terminal of the DC-DC converter 2, the first output terminal of the current detector 8 is connected to the load appliance, and the second output terminal of the current detector 8 is connected to the control module 1. In other embodiments, please refer to... Figure 4 The first output terminal of the current detector 8 is connected to the power path in the four-channel connector 6, and the second output terminal of the current detector 8 is connected to the control module 1. In the above embodiment, the function of the current detector 8 is to obtain the output current of the DC output channel, which is also the load current of the load appliance. Based on the detected current value, the power of the load appliance and the output power of the DC output channel can be determined. In this embodiment, the selection of the current detector 8 is not limited. The current detector 8 can be a current detection chip (such as INA3221), a current transformer, or a differential amplifier circuit. It should be understood that the connection relationship between the current detector 8 and other components of the circuit is determined according to the actual model of the current detector 8, and the above connection relationship is not a limitation on the current detector 8.

[0056] In this invention, the number of DC output channels is not limited. In some cases, please refer to... Figure 1 The system has eight DC output channels. Furthermore, the DC output channels are independent of each other, meaning that different DC output channels can have different output voltages. By setting preset output voltage values ​​for each DC output channel through the control module 1, the purpose of outputting different voltages can be achieved. Further, in some possible embodiments, each DC output channel is also equipped with a channel switch. The channel switch can be an analog switch located between the DC signal source and the DC converter 2. The analog switch is connected to the control module 1, and by controlling the on / off state of the channel switch, the opening and closing of the DC output channel can be controlled.

[0057] In some embodiments, please refer to Figure 4 The DC output channel is equipped with circuit protection. Specifically, the DC output channel also includes circuit protection 9, which can be a fuse or other type of protective device. Circuit protection 9 is installed on the output port line of the DC converter 2, that is, on the connection line between the current detector 8 and the four-channel connector 6. The purpose of setting circuit protection 9 is to prevent short circuits at the output port of the DC output channel and avoid damage to the circuit components by short-circuit current.

[0058] As the power supply is used for a longer period of time, in addition to the temperature changes in the lines between the channel and the load device, the temperature of each component in the DC output channel will also change, especially the DC converter 2. If the temperature rise of the DC converter 2 is too large, it will also cause the output voltage of the DC output channel to be unstable, thereby affecting the stability of the voltage at the power supply end.

[0059] To address the aforementioned issues, in some embodiments, the DC output channel further includes a cooling fan (not shown in the figure), which is connected to both the DC signal source and the control module 1. Based on this configuration, when the DC output channel is activated, the control module 1 controls the cooling fan in that channel to start, enabling the cooling fan to cool the DC converter 2 and maintain a stable output voltage. Furthermore, to improve the accuracy of temperature control, the DC output channel can also be equipped with a temperature detector. The temperature detector detects the temperature of the DC converter 2 and sends the detection result to the control module 1. The control module 1 intelligently controls the speed of the cooling fan based on the actual temperature, thereby achieving precise temperature control.

[0060] In this utility model, please refer to Figure 4 The control module 1 can be connected to an external controller 11, such as a computer, industrial computer, mobile phone, tablet computer, etc. The connection method between the control module 1 and the controller 11 can be serial communication, network port connection, wireless communication connection, etc. In some cases, the control module 1 includes a wireless communication device (not shown in the figure), which is used for wireless communication connection with the external controller 11.

[0061] Based on the above embodiments, please further refer to... Figure 4 The multi-channel adjustable DC regulated power supply also includes a display module 10, which is communicatively connected to the control module 1. The display module 10 can display parameters such as voltage, current, power, and terminal voltage of each DC output channel, making it convenient for operators to view.

[0062] The above embodiments have described in detail a multi-channel adjustable DC regulated power supply of this utility model. Without conflict, features from different embodiments can be freely combined to form new solutions. For ease of understanding, the following specific embodiment will be used to describe in detail the usage process of a multi-channel adjustable DC regulated power supply of this utility model.

[0063] Please refer to Figure 5 In one specific embodiment, the multi-channel adjustable DC regulated power supply includes a control module 1 and eight DC output channels. The control module 1 is configured as a microcontroller (STM32H723 series chip, integrating a single-ended analog-to-digital converter 7 and a differential analog-to-digital converter 5). The microcontroller is connected to a computer via a serial port or network port. The computer also serves as a controller 11 and a display module 10. Each DC output channel is equipped with a current detector 8, a cooling fan, and a four-channel connector 6. The current detector 8 is configured as a current detection chip (INA3221), the four-channel connector 6 is configured as an XT30PW (2+2) connector, the DC converter 2 is configured as a DC-DC chip (SI C437A), the DC signal source is an 18-28V voltage source, the feedback resistor 3 is configured as a 4.7kΩ resistor, and the variable resistor 4 is configured as an electronic potentiometer (AD5290). Each bit of the electronic potentiometer corresponds to a 0.05V step of voltage.

[0064] The multi-channel adjustable DC regulated power supply configured above requires the DC signal source connected to DC converter 2 to be turned on before initial setup. Specifically, the operator uses a computer connected to the microcontroller to control the microcontroller, setting which channels need to be activated and the pre-output voltage for each channel before activating them. After initial setup, the multi-channel adjustable DC regulated power supply enters automatic operation. The operation flow of the multi-channel adjustable DC regulated power supply is as follows: Figure 6 As shown, the microcontroller adjusts the electronic potentiometer in the designated channel according to the initially set parameters. Then, it checks whether the channel is normal, that is, whether the DC-DC chip is outputting a voltage signal normally. If the channel is abnormal, it feeds back to the computer control terminal to reset the initial settings. If the channel is normal, it performs current detection and records the operating data, including the actual detected voltage at the power consumption terminal. Finally, it compares the actual detected voltage at the power consumption terminal with the preset voltage at the power consumption terminal. If they are inconsistent, it returns to the electronic potentiometer adjustment step and repeats the subsequent steps until the actual detected voltage at the power consumption terminal matches the preset voltage at the power consumption terminal, thus achieving regulated output.

[0065] This embodiment enables the setting of a fixed voltage at the power consumption terminal and the acquisition of data from the power consumption terminal when the connection cable is long, thus realizing the detection work at the power consumption terminal and ensuring a stable output voltage. Furthermore, the multi-channel adjustable DC regulated power supply can simultaneously control multiple independent channels, making it applicable in complex testing scenarios. After initial setting, it has an automatic adjustment function, reducing manual workload and improving convenience and accuracy.

[0066] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A multi-channel adjustable DC regulated power supply, characterized in that, The control module and at least two direct current output channels are included, the direct current output channel includes a direct current converter, a feedback resistor, a variable resistor and a differential analog-to-digital converter; The power input end of the direct current converter is connected with a direct current signal source, and the power output end of the direct current converter is connected with the input end of a load appliance; The feedback resistor and the variable resistor are connected in series to form an output feedback circuit, the first end of the output feedback circuit is connected with the power output end of the direct current converter, the second end of the output feedback circuit is grounded, one end of the variable resistor connected with the feedback resistor is connected with the feedback input end of the direct current converter, and the control module is connected with the control input end of the variable resistor; The input end of the differential analog-to-digital converter is connected with the input end of the load appliance, and the output end of the differential analog-to-digital converter is connected with the control module.

2. The multi-channel regulated DC power supply of claim 1, wherein, The direct current output channel further includes a four-channel connector, the four-channel connector includes two power supply channels and two data channels, the data channel is connected with the input end of the differential analog-to-digital converter, and the data channel is used to acquire the input end voltage of the load appliance.

3. The multi-channel regulated DC power supply of claim 2, wherein, The direct current output channel further includes a single-ended analog-to-digital converter, the input end of the single-ended analog-to-digital converter is connected with the power output end of the direct current converter, and the output end of the single-ended analog-to-digital converter is connected with the control module.

4. The multi-channel regulated DC power supply of claim 3, wherein, The direct current output channel further includes a current detector, the input end of the current detector is connected with the power output end of the direct current converter, the first output end of the current detector is connected with the power supply channel of the four-channel connector, and the second output end of the current detector is connected with the control module.

5. The multi-channel regulated DC power supply of claim 4, wherein, The direct current output channel further includes a fuse, and the fuse is arranged on the connection line between the current detector and the four-channel connector.

6. The multi-output regulated DC power supply of claim 1, wherein, The control module is a single-chip microcomputer, and the differential analog-to-digital converter is integrated in the single-chip microcomputer.

7. The multi-channel regulated DC power supply of claim 1, wherein, The variable resistor is an electronic potentiometer.

8. The multi-output regulated DC power supply of claim 1, wherein, The direct current output channel further includes a cooling fan, and the cooling fan is connected with the direct current signal source and the control module respectively.

9. The multi-output regulated DC power supply of claim 1, wherein, The control module includes a wireless communicator, and the wireless communicator is used to be wirelessly connected with an external controller.

10. The multi-channel regulated DC power supply of claim 9, wherein, The multi-channel adjustable direct current stabilized power supply further includes a display module, and the display module is connected with the control module in communication.

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