Power circuit and system for single-wire power supply of a diagnostic module for controlling a system

Abstract

The present invention discloses a power supply circuit and a system for single-wire power extraction of a diagnostic module for a control system. The power supply circuit includes an input interface, a first output interface, and the single-wire power extraction power supply circuit is connected in series with the power supply through the input interface and the first output interface; a second output interface, the second output interface is connected to the input interface and the load; a control module, the control module is connected to the input interface and the ground terminal, and the control module is configured to output a first control instruction according to the electrical signal of the input interface; a switching power extraction module, the switching power extraction module is connected to the input interface, the first output interface, and the control module; the switching power extraction module is configured to extract power from the power supply through the input interface and the first output interface in response to the first control instruction. The technical solution provided by the embodiments of the present invention realizes power extraction through a live wire or a neutral wire, and solves the problem that the traditional mechanical wall switch box cannot meet the wiring requirements of the smart home switch and requires re-wiring.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply circuits, and particularly to a single-wire power supply circuit and system for a diagnostic module of a control system. Background Art

[0002] Conventional power supply generally requires the participation of both the neutral wire and the live wire. Smart homes generally have a constant voltage output circuit that converts AC to DC, and the AC-to-DC constant voltage output circuit requires the neutral wire and the live wire as power inputs. However, most traditional mechanical wall switch boxes at home and abroad are single-wire wired. During home upgrade and intelligent transformation, traditional mechanical wall switch boxes cannot meet the wiring requirements of smart home switches and need to be rewired, which affects the user experience. Summary of the Invention

[0003] The present invention provides a single-wire power supply circuit and system for a diagnostic module of a control system to solve the problem that traditional mechanical wall switch boxes cannot meet the wiring requirements of smart home switches and need to be rewired.

[0004] According to one aspect of the present invention, there is provided a single-wire power supply circuit for a diagnostic module of a control system, including:

[0005] An input interface,

[0006] A first output interface, the single-wire power supply circuit is connected in series with the power supply through the input interface and the first output interface;

[0007] A second output interface, the second output interface is connected to the input interface and the load;

[0008] A control module, the control module is connected to the input interface and the ground terminal, and the control module is configured to output a first control instruction according to the electrical signal of the input interface;

[0009] A switch power supply module, the switch power supply module is connected to the input interface, the first output interface and the control module; the switch power supply module is configured to draw power from the power supply through the input interface and the first output interface in response to the first control instruction.

[0010] Optionally, the control module includes:

[0011] A sampling unit, the sampling unit is connected to the second output interface, and the sampling unit is configured to collect the electrical signal of the second output interface;

[0012] A comparison unit, the comparison unit is connected to the sampling unit, and the comparison unit is configured to compare the electrical signal of the second output interface with a preset reference signal to generate a first control instruction.

[0013] Optionally, the switch power-taking module includes a first switch transistor. The first pole of the first switch transistor is connected to the input interface, and the second pole of the first switch transistor is connected to the first output interface. The control end of the first switch transistor is connected to the output end of the comparison unit. The first switch transistor is used to conduct or cut off according to the first control instruction.

[0014] Optionally, the power supply circuit further includes an isolation module. The input end of the isolation module is connected to the input interface and the input end of the switch power-taking module. The output end of the isolation module is connected to the second output interface. The isolation module is used to isolate the electrical signal of the input interface and step down and output it.

[0015] The storage module is connected to the input interface and the input end of the isolation module. The storage module is used to store electrical energy when the power-taking module takes power from the power supply.

[0016] Optionally, the isolation module includes:

[0017] A transformer and a switch unit. The first end of the primary side of the transformer is connected to the input end of the isolation module, and the second end of the primary side of the transformer is grounded through the switch unit.

[0018] The secondary side of the transformer is connected to the second output interface.

[0019] The transformer is used to isolate the second output interface from the input interface.

[0020] The switch unit is used to conduct or cut off the first end and the second end of the primary side of the transformer to adjust the electrical signal output by the second output interface.

[0021] Optionally, the switch unit includes:

[0022] A second switch transistor. The first end of the second switch transistor is connected to the second end of the primary side of the transformer. The second end of the second switch transistor is grounded. The control end of the second switch transistor is connected to the first end of the primary side of the transformer.

[0023] Optionally, the isolation module further includes:

[0024] A feedback regulation unit. The input end of the feedback regulation unit is connected to the secondary side of the transformer and the second output interface. The output end of the feedback regulation unit is connected to the first end of the primary side of the transformer and the switch unit.

[0025] The feedback regulation unit is used to generate a second control instruction according to the electrical signal output by the secondary side of the transformer.

[0026] The switch unit is used to conduct or cut off the first end and the second end of the primary side of the transformer according to the second control instruction to adjust the electrical signal output by the second output interface.

[0027] Optionally, the feedback regulation unit includes:

[0028] Opto-coupler component and regulating component;

[0029] The input end of the opto-coupler component is connected to the secondary side of the transformer, and the output end of the opto-coupler component is respectively connected to the first end of the primary side of the transformer and the first end of the regulating component; the opto-coupler component is used to couple out a feedback signal according to the electrical signal output from the secondary side of the transformer;

[0030] The second end of the regulating component is connected to the control end of the switching unit and the first end of the auxiliary coil of the transformer; the third end of the regulating component is connected to the second end of the switching unit; the regulating component is used to adjust the conduction state of the switching unit according to the feedback signal.

[0031] Optionally, the regulating component includes:

[0032] A third switching transistor, a first resistor, a second resistor, a third resistor and a first capacitor;

[0033] The first pole of the third switching transistor is connected to the control end of the switching unit, the second pole of the third switching transistor is grounded, the control end of the third switching transistor is connected to the first end of the first resistor, the first end of the second resistor and the first end of the first capacitor, the second end of the first resistor is connected to the output end of the opto-coupler component, the second end of the second resistor is connected to the first end of the third resistor and the second pole of the switching unit, and the second end of the third resistor is grounded together with the second end of the first capacitor.

[0034] In a second aspect, an embodiment of the present invention provides a control system, including a power supply circuit for taking power from a single wire for controlling a diagnostic module of the system and the diagnostic module;

[0035] The power supply circuit for controlling the diagnostic module of the system is connected to the diagnostic module, and the power supply circuit for controlling the diagnostic module of the system is used to supply power to the diagnostic module.

[0036] The technical solution of the embodiment of the present invention includes an input interface, a first output interface, a second output interface, a control module and a switching power-taking module. By connecting the power supply circuit for taking power from a single wire in series with the power supply through the input interface and the first output interface, the second output interface is connected to the input interface and the load, the control module is connected to the input interface and the ground terminal, and the switching power-taking module is connected to the input interface, the first output interface and the control module. The control module outputs a first control instruction according to the electrical signal of the input interface, and enables the switching module to take power from the power supply through the input interface and the first output interface in response to the first control instruction. It realizes power taking through one line, reducing the difficulty of power taking.

[0037] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 FIG. is a schematic structural diagram of a power supply circuit for single-wire power extraction of a diagnostic module for a control system provided by an embodiment of the present invention;

[0040] Figure 2 FIG. is a schematic structural diagram of another power supply circuit for single-wire power extraction of a diagnostic module for a control system provided by an embodiment of the present invention;

[0041] Figure 3 FIG. is a schematic structural diagram of yet another power supply circuit for single-wire power extraction of a diagnostic module for a control system provided by an embodiment of the present invention;

[0042] Figure 4 FIG. is a schematic circuit diagram of a power supply circuit for single-wire power extraction of a diagnostic module for a control system provided by an embodiment of the present invention;

[0043] Figure 5 FIG. is a schematic structural diagram of yet another power supply circuit for single-wire power extraction of a diagnostic module for a control system provided by an embodiment of the present invention;

[0044] Figure 6 FIG. is a schematic circuit diagram of another power supply circuit for single-wire power extraction of a diagnostic module for a control system provided by an embodiment of the present invention;

[0045] Figure 7 FIG. is a schematic structural diagram of a control system provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] In order to enable those skilled in the art to better understand the solutions of the present invention, the following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, rather than all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0047] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0048] Figure 1 is a schematic structural diagram of a power supply circuit for single-wire power extraction of a diagnostic module for a control system provided by an embodiment of the present invention. Refer to Figure 1 As shown in, the power supply circuit 100 includes: an input interface 1, a first output interface 2. The single-wire power extraction power supply circuit 100 is connected in series with the power supply through the input interface 1 and the first output interface 2; a second output interface 3, and the second output interface 3 is connected to the input interface 1 and the load; a control module 10, and the control module 10 is connected to the input interface 1 and the ground terminal, and the control module 10 is configured to output a first control instruction according to the electrical signal of the input interface 1; a switching power extraction module 20, and the switching power extraction module 20 is connected to the input interface 1, the first output interface 2 and the control module 10; the switching power extraction module 20 is configured to respond to the first control instruction and extract power from the power supply through the input interface 1 and the first output interface 2.

[0049] Specifically, the input interface 1 and the first output interface 2 are on the same line. For example, they are both connected to the neutral line or both connected to the live line at the same time. La and Lb are the two ends connected to the neutral line or the live line when the single-wire power extraction power supply circuit for the diagnostic module of the control system is connected to the neutral line or the live line. The single-wire power extraction power supply circuit 100 is connected in series with the power supply through the input interface 1 and the first output interface 2. The second input interface 1 is connected to the load and is used to output electrical energy to the load. The control module 10 is connected to the input interface 1 and is configured to output a first control instruction according to the electrical signal of the input interface 1. Exemplarily, the control module 10 can be a controller such as a single-chip microcomputer or a comparison circuit, etc. The switching power extraction module 20 is connected to the input interface 1 and the control module 10 and is configured to respond to the first control instruction and extract power from the power supply through the input interface 1.

[0050] Exemplarily, when a load such as a smart appliance needs power, the control module 10 issues a first control instruction to the switch power extraction module 2 according to the electrical signal of the input interface 1. The switch power extraction module 2 performs single-wire power extraction from the input interface 1 and outputs to the load from the second output interface 3. When the single-wire power extraction is completed, the control module 10 issues the first control instruction to the switch power extraction module 2 again, and the switch power extraction module 2 stops the single-wire power extraction.

[0051] The power supply circuit for single-wire power extraction of the diagnostic module for the control system provided by the embodiment of the present invention. The single-wire power supply circuit 100 is connected in series with the power supply through the input interface 1 and the first output interface 2. The second input interface 1 is connected to the load. The control module 10 is connected to the input interface 1. The switch power extraction module 20 is connected to the input interface 1 and the control module 10. Such a setting enables the control module 10 to output a first control instruction according to the electrical signal of the input interface 1. The switch power extraction module 20 responds to the first control instruction to extract power from the power supply through the input interface 1, realizing power extraction through a single line, and reducing the difficulty of power extraction.

[0052] Optionally, Figure 2 is a schematic structural diagram of another power supply circuit for single-wire power extraction of the diagnostic module for the control system provided by the embodiment of the present invention. On the basis of the above embodiment, refer to Figure 2 , the control module 10 includes a sampling unit 12. The sampling unit 12 is connected to the second output interface 3. The sampling unit 12 is used to collect the electrical signal of the second output interface 3. A comparison unit 11, the comparison unit 11 is connected to the sampling unit 12. The comparison unit 11 is used to compare the electrical signal of the second output interface 3 with a preset reference signal and generate a first control instruction.

[0053] Specifically, the sampling unit 12 is used to collect the electrical signal of the second output interface 3. When the power supply circuit is not extracting power, the electrical signal of the second output interface 3 is weak. When the power supply circuit has been extracting power for a period of time, the electrical signal of the second output interface 3 will increase. The comparison unit 11 is connected to the sampling unit 12. After the sampling unit 12 collects the electrical signal of the second output interface 3, it will feedback to the comparison unit 11. The comparison unit 11 compares the obtained electrical signal of the second output interface 3 with the preset reference signal. If the electrical signal of the second output interface 3 is less than the preset reference signal, a first control instruction is generated to control the switch power extraction module 20. Such a setting enables the power supply circuit to judge whether power extraction is required according to the current situation.

[0054] Optionally, on the basis of the above embodiment, continue to refer to Figure 2, the switch power-taking module 20 includes a first switch tube 21. The first pole of the first switch tube 21 is connected to the input interface 1, and the second pole of the first switch tube 21 is connected to the first output interface 2. The control end of the first switch tube 21 is connected to the output end of the comparison unit 11, and the first switch tube 21 is used to conduct or cut off according to the first control instruction.

[0055] Specifically, the first control instruction generated by the control module 10 is output to the first switch tube 21 through the output end of the comparison unit 11. When the electrical signal of the second output interface 3 is less than the preset reference signal, the first switch tube 21 is cut off, and at this time, the switch power-taking module 20 performs single-wire power-taking. When the electrical signal of the second output interface 3 is greater than the preset reference signal, the first switch tube 21 is conducted, and at this time, the switch power-taking module 20 is bypassed and cannot take power. Such a setting enables the power supply circuit to control the circuit to take power according to actual needs.

[0056] Optionally, Figure 3 is a schematic structural diagram of another power supply circuit for single-wire power-taking of the diagnostic module for controlling the system provided by the embodiment of the present invention. On the basis of the above embodiment, refer to Figure 3 , the power supply circuit further includes an isolation module 40. The input end of the isolation module 40 is connected to the input interface 1 and the input end of the switch power-taking module 20, and the output end of the isolation module 40 is connected to the second output interface 3. The isolation module 40 is used to isolate and step down the electrical signal of the input interface 1 for output. A storage module 30, the storage module 30 is connected to the input interface 1 and the input end of the isolation module 40, and the storage module 30 is used to store electrical energy when the power-taking module takes power from the power supply.

[0057] Specifically, since the voltage input at the input interface 1 is very large, directly outputting the high-voltage current from the output interface will cause damage to the electrical appliances. To ensure safe and reliable power consumption, it is necessary to use the isolation module 40 to isolate and step down the electrical signal of the input interface 1 for output. After the switch power-taking module 20 takes power, the current enters the storage module 30 from the input interface 1 for storage.

[0058] Exemplarily, Figure 4It is a circuit schematic diagram of a power supply circuit for single-wire power extraction of a diagnostic module for a control system provided by an embodiment of the present invention. When the voltage circuit provided in this embodiment performs single-wire power extraction, the first switching tube 21 is turned off, and the current enters from the input interface 1, flows through the switching power extraction module 20 into the isolation module 40, and then flows from the isolation module 40 into the storage module 30 for storage. As the electrical energy stored in the storage module 30 increases, the electrical signal of the second output interface 3 strengthens. The sampling unit 12 sends the collected electrical signal to the comparison unit 11 to compare with a preset reference signal. When the electrical signal of the second output interface 3 is greater than the preset reference signal, the sampling unit 12 issues a first control signal to turn on the first switching tube 21. At this time, the switching power extraction module 20 is bypassed, and the power extraction process is temporarily stopped. Since the electrical signal of the second output interface 3 weakens after the power extraction stops, when the electrical signal of the second output interface 3 is less than the preset reference signal, the sampling unit 12 issues a first control signal to turn off the first switching tube 21, and the switching power extraction module 20 starts the power extraction work again. In this way, a negative feedback adjustment circuit is formed, and at the same time, a high-frequency switching pulse waveform is formed between the two poles of the first switching tube 21.

[0059] Optionally, Figure 5 It is a structural schematic diagram of another power supply circuit for single-wire power extraction of a diagnostic module for a control system provided by an embodiment of the present invention. On the basis of the above embodiment, refer to Figure 5 , the isolation module 40 includes a transformer 41 and a switching unit 42. The first end of the primary side of the transformer 41 is connected to the input end of the isolation module 40, and the second end of the primary side of the transformer 41 is grounded through the switching unit 42; the secondary side of the transformer 41 is connected to the second output interface 3; the transformer 41 is used to isolate the second output interface 3 from the input interface 1; the switching unit 42 is used to conduct or cut off the first end and the second end of the primary side of the transformer 41 to adjust the electrical signal output by the second output interface 3.

[0060] Specifically, the isolation module 40 includes a transformer 41 and a switching unit 42. The transformer 41 is used to convert the high voltage input at the interface end into a low voltage. The primary side of the transformer 41 can be used to store energy and couple the energy between the primary side and the secondary side, and the auxiliary winding generates a positive feedback signal. The secondary side of the transformer 41 can output a safe low-voltage current. The switching unit 42 is used to control the conduction or cut-off of the first end and the second end of the primary side of the transformer 41 to adjust the electrical signal output by the second output interface 3. When the current output by the switching power extraction module 20 makes the switching unit 42 conduct, the transformer 41 starts to work, and when the current decreases and the switching unit 42 is turned off, the transformer 41 stops working.

[0061] Optionally, on the basis of the above embodiment, continue to refer to Figure 5, the switching unit 42 includes a second switching transistor 43. The first end of the second switching transistor 43 is connected to the second end of the primary side of the transformer 41. The second end of the second switching transistor 43 is grounded. The control end of the second switching transistor 43 is connected to the first end of the primary side of the transformer 41.

[0062] Specifically, when the switching unit 42 is turned on, current flows from the first end of the primary side of the transformer 41 to the second end of the second switching transistor 43 connected to the second end. The control end of the second switching transistor 43 is used to turn on or off the connection between the first end and the second end of the primary side of the transformer 41 to adjust the electrical signal output by the second output interface 3.

[0063] Optionally, based on the above embodiment, continue to refer to Figure 5 , the isolation module 40 further includes a feedback regulation unit 44. The input end of the feedback regulation unit 44 is connected to the secondary side of the transformer 41 and the second output interface 3. The output end of the feedback regulation unit 44 is connected to the first end of the primary side of the transformer 41 and the switching unit 42. The feedback regulation unit 44 is used to generate a second control instruction according to the electrical signal output by the secondary side of the transformer 41. The switching unit 42 is used to turn on or off the connection between the first end and the second end of the primary side of the transformer 41 according to the second control instruction to adjust the electrical signal output by the second output interface 3.

[0064] Specifically, the feedback regulation unit 44 is used to form overcurrent protection and perform feedback regulation on the output voltage. When the electrical signal output by the secondary side of the transformer 41 increases, the feedback regulation unit 44 generates a second control instruction to control the switching unit 42 to turn off the connection between the first end and the second end of the primary side of the transformer 41 to weaken the electrical signal. When the electrical signal output by the secondary side of the transformer 41 decreases, the feedback regulation unit 44 generates a second control instruction to control the switching unit 42 to turn on the connection between the first end and the second end of the primary side of the transformer 41 to strengthen the electrical signal. Such a setting realizes the feedback regulation of the output voltage by the feedback regulation unit.

[0065] It should be noted that Figure 5 exemplarily shows the case where the input part and the output part of the feedback regulation unit 44 are shown separately. Signal transmission can be performed between the input part and the output part of the feedback regulation unit 44 through coupling, and no specific limitation is made here.

[0066] Optionally, Figure 6 is a circuit schematic diagram of another power supply circuit for single-wire power extraction of the diagnostic module for the control system provided by the embodiment of the present invention. Based on the above embodiment, refer to Figure 6, the feedback adjustment unit 44 includes an optocoupler component 45 and an adjustment component 46. The input end of the optocoupler component 45 is connected to the secondary side of the transformer 41, and the output end of the optocoupler component 45 is respectively connected to the first end of the primary side of the transformer 41 and the first end of the adjustment component 46. The optocoupler component 45 is used to couple out a feedback signal according to the electrical signal output from the secondary side of the transformer 41. The second end of the adjustment component 46 is connected to the control end of the switch unit 42 and the first end of the auxiliary coil of the transformer 41, and the third end of the adjustment component 46 is connected to the second end of the switch unit 42. The adjustment component 46 is used to adjust the conduction state of the switch unit 42 according to the feedback signal.

[0067] Specifically, the input end of the optocoupler component 45 can be various light-emitting devices, and the output end can be a photosensitive diode or a photosensitive resistor. When the current at the input end increases, the light-emitting device emits light, the output end conducts, and a feedback signal is coupled out. When the adjustment component 46 receives the feedback signal, the current weakens, causing the switch unit 42 to turn off. When the feedback signal stops, the current increases, causing the switch unit 42 to conduct.

[0068] Optionally, on the basis of the above embodiment, continue to refer to Figure 6 , the adjustment component 46 includes a third switching transistor Q3, a first resistor R2, a second resistor R4, a third resistor R3, and a first capacitor C2. The first pole of the third switching transistor Q3 is connected to the control end of the switch unit 42, the second pole of the third switching transistor Q3 is grounded, the control end of the third switching transistor Q3 is connected to the first end of the first resistor R2, the first end of the second resistor R4, and the first end of the first capacitor C2. The second end of the first resistor R2 is connected to the output end of the optocoupler component 45, the second end of the second resistor R4 is connected to the first end of the third resistor R3 and the second pole of the switch unit 42, and the second end of the third resistor R3 is connected to the second end of the first capacitor C2 and grounded.

[0069] Specifically, the first resistor R2 is a protection resistor, the third resistor R3 is a sampling resistor, and the third resistor R3 is used to collect the current flowing through the switch unit 42. Through the phase-shifting circuit composed of the second resistor R4 and the first capacitor C2, a certain sampling voltage is formed. When overcurrent occurs, the third switching transistor Q3 conducts, causing the second switching transistor 43 to turn off, thereby realizing overcurrent protection. When performing feedback adjustment, the optocoupler component 45 couples out a feedback signal to control the second switching transistor 43. When the second switching transistor 43 conducts, the switch unit 42 turns off. When the second switching transistor 43 turns off, the switch unit 42 conducts.

[0070] Exemplarily, on the basis of the above embodiment, continue to refer to Figure 6After single-wire power extraction, the current flows from the storage module 30 to the isolation module 40, and after being stepped down by the transformer 41, it is output from the second output interface 3. As the output current increases, overcurrent will occur. At this time, the third switching transistor Q3 conducts, turning off the second switching transistor 43, thereby achieving overcurrent protection. When performing feedback regulation, if the current increases, the optocoupler component 45 couples out a feedback signal, causing the third switching transistor Q3 to conduct and the second switching transistor 43 to turn off, reducing the current. If the current decreases, the optocoupler component 45 does not emit a signal, the third switching transistor Q3 remains off, and the second switching transistor 43 conducts, increasing the current. This setting improves the safety of the circuit, realizes the feedback regulation of the output voltage, and improves the stability of the single-wire power extraction process.

[0071] Optionally, an embodiment of the present invention further provides a control system. Figure 7 It is a schematic structural diagram of a control system provided by an embodiment of the present invention. On the basis of the above embodiment, refer to Figure 7 , the control system 200 provided by an embodiment of the present invention includes the single-wire power extraction power supply circuit 100 for the diagnostic module of the control system provided in any foregoing embodiment of the present disclosure and the diagnostic module 110. The single-wire power extraction power supply circuit 100 for the diagnostic module of the control system is connected to the diagnostic module 110, and the single-wire power extraction power supply circuit 100 for the diagnostic module of the control system is used to supply power to the diagnostic module 110. It has the beneficial effects of the single-wire power extraction power supply circuit 100 for the diagnostic module of the control system provided in any foregoing embodiment of the present disclosure, which will not be elaborated here.

[0072] It should be understood that various forms of the processes shown above can be used, reordering, adding, or deleting steps. For example, the steps described in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, which will not be limited herein.

[0073] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A single-wire power supply circuit for a diagnostic module of a control system, characterized in that, The power supply circuit includes: An input interface, A first output interface, and the power supply circuit for single-wire power extraction is connected in series with the power supply through the input interface and the first output interface; A second output interface, and the second output interface is connected to the input interface and the load; A control module, which is connected to the second output interface and the ground terminal, and the control module is configured to output a first control instruction according to the electrical signal of the second output interface; A switching power extraction module, which is connected to the input interface, the first output interface and the control module; the switching power extraction module is configured to extract power from the power supply through the input interface and the first output interface in response to the first control instruction; The control module includes: A sampling unit, which is connected to the second output interface, and the sampling unit is configured to collect the electrical signal of the second output interface; A comparison unit, which is connected to the sampling unit, and the comparison unit is configured to compare the electrical signal of the second output interface with a preset reference signal to generate a first control instruction.

2. The power supply circuit according to claim 1, wherein The switching power extraction module includes a first switching tube, a first pole of the first switching tube is connected to the input interface, and a second pole of the first switching tube is connected to the first output interface; a control end of the first switching tube is connected to an output end of the comparison unit, and the first switching tube is configured to conduct or turn off according to the first control instruction.

3. The power supply circuit according to claim 1, wherein It further includes: An isolation module, an input end of the isolation module is connected to the input interface and an input end of the switching power extraction module, and an output end of the isolation module is connected to the second output interface, and the isolation module is configured to isolate and step down the electrical signal of the input interface for output; A storage module, which is connected to the input interface and an input end of the isolation module, and the storage module is configured to store electrical energy when the power extraction module extracts power from the power supply.

4. The power supply circuit according to claim 3, wherein The isolation module includes: A transformer and a switching unit, a first end of a primary side of the transformer is connected to an input end of the isolation module, and a second end of the primary side of the transformer is grounded through the switching unit; A secondary side of the transformer is connected to the second output interface; The transformer is configured to isolate the second output interface from the input interface; The switching unit is configured to conduct or turn off the first end and the second end of the primary side of the transformer to adjust the electrical signal output by the second output interface.

5. The power supply circuit according to claim 4, wherein The switching unit includes: A second switching tube, a first end of the second switching tube is connected to a second end of the primary side of the transformer, a second end of the second switching tube is grounded, and a control end of the second switching tube is connected to a first end of the primary side of the transformer.

6. The power supply circuit according to claim 4, wherein The isolation module further includes: A feedback regulation unit, an input end of the feedback regulation unit is connected to a secondary side of the transformer and the second output interface, and an output end of the feedback regulation unit is connected to a first end of the primary side of the transformer and the switching unit; The feedback adjustment unit is configured to generate a second control instruction according to the electrical signal output from the secondary side of the transformer; The switch unit is configured to conduct or cut off the connection between the first end and the second end of the primary side of the transformer according to the second control instruction, so as to adjust the electrical signal output from the second output interface.

7. The power supply circuit according to claim 6, characterized in that The feedback adjustment unit includes: An optocoupler component and an adjustment component; The input end of the optocoupler component is connected to the secondary side of the transformer, and the output end of the optocoupler component is respectively connected to the first end of the primary side of the transformer and the first end of the adjustment component; the optocoupler component is configured to couple out a feedback signal according to the electrical signal output from the secondary side of the transformer; The second end of the adjustment component is connected to the control end of the switch unit and the first end of the auxiliary coil of the transformer; the third end of the adjustment component is connected to the second end of the switch unit; the adjustment component is configured to adjust the conduction state of the switch unit according to the feedback signal.

8. The power supply circuit according to claim 7, wherein, The adjustment component includes: A third switching transistor, a first resistor, a second resistor, a third resistor and a first capacitor; The first pole of the third switching transistor is connected to the control end of the switch unit, the second pole of the third switching transistor is grounded, the control end of the third switching transistor is connected to the first end of the first resistor, the first end of the second resistor and the first end of the first capacitor, the second end of the first resistor is connected to the output end of the optocoupler component, the second end of the second resistor is connected to the first end of the third resistor and the second pole of the switch unit, and the second end of the third resistor and the second end of the first capacitor are grounded.

9. A control system, characterized in that, It includes: The power supply circuit for single-wire power extraction of the diagnostic module for controlling the system according to any one of claims 1-8, and the diagnostic module; The power supply circuit for the diagnostic module for controlling the system is connected to the diagnostic module, and the power supply circuit for the diagnostic module for controlling the system is configured to supply power to the diagnostic module.

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