Self-recognition type slow start circuit and welding and cutting equipment

Abstract

The utility model relates to a self-recognition type slow start circuit and welding and cutting equipment. The self-recognition type slow start circuit comprises a switch control module, a power supply module and a slow start module, the switch control module is electrically connected with the power supply module and the slow start module; wherein the switch control module is used for conducting a connection loop of the slow start module according to an input potential signal when the welding and cutting workstation is in a working state; the slow start module is used for collecting the voltage of the reference point and conducting a connection loop of the power supply module and the coil of the welding and cutting work station when the voltage of the reference point is greater than a preset reference value; and the slow start module is also used for cutting off a connection loop between the power supply module and the coil of the welding and cutting work station when the voltage of the reference point is not greater than the preset reference value. Therefore, the problem of current impact of the new energy welding and cutting system when a welding machine is started is solved, the stability of the new energy welding and cutting system is improved, the service life of the new energy welding and cutting system is prolonged, system energy consumption is well reduced, and wide application prospects are achieved.

Description

Technical Field

[0001] This application relates to the field of power electronics technology, and in particular to a self-identifying soft-start circuit and welding / cutting equipment. Background Technology

[0002] With the development of new energy technologies, the application scope of new energy is becoming wider and wider, such as welding, lighting, and wilderness rescue in the absence of power supply outdoors.

[0003] Welding machines are essential equipment in the manufacturing industry. As an indispensable tool in mechanical manufacturing, they span multiple disciplines, including welding technology, electric arc welding, and power electronics. It is well known that welding machines need to operate under high current, resulting in a large inrush current during startup. Traditionally, delay circuits are used to achieve a soft start-up.

[0004] However, this control method still cannot solve the problem of large current surges when the welding machine starts up. Especially when applied to new energy systems, due to their special operating conditions and requirements, surge current surges can seriously affect the stability and service life of the new energy system. Utility Model Content

[0005] Therefore, it is necessary to provide a self-recognition soft-start circuit and welding and cutting equipment, which can solve the current surge problem when the welding machine starts up in the new energy welding and cutting system, improve the stability and service life of the new energy welding and cutting system, and greatly reduce the system energy consumption, and has broad application prospects.

[0006] In a first aspect, embodiments of this application provide a self-recognition soft-start circuit, comprising: a switch control module, a power supply module, and a soft-start module; wherein the switch control module is electrically connected to the power supply module and the soft-start module; and wherein:

[0007] The switch control module is used to activate the connection circuit of the soft-start module according to the input potential signal when the welding and cutting workstation is in operation.

[0008] The soft-start module is used to collect the voltage of the reference point and, when the voltage of the reference point is greater than a preset reference value, to connect the power supply module and the welding and cutting workstation coil.

[0009] The soft-start module is also used to disconnect the connection circuit between the power supply module and the welding and cutting workstation coil when the voltage at the reference point is not greater than a preset reference value.

[0010] In one embodiment, the switch control module includes: a signal input port CN1, a relay K1, a first switch Q1, a second switch Q2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a seventh resistor R7, an eighth resistor R8, a second capacitor C2, a first diode D1, and a first LED1, wherein:

[0011] The first pin of the signal input port CN1 is connected to the power supply, the first pin of the signal input port CN1 is grounded, the third pin of the signal input port CN1 is connected to the 24V voltage terminal, the fourth pin of the signal input port CN1 is connected to one end of the second capacitor C2, one end of the eighth resistor R8, and the control terminal of the first switch Q1 through the seventh resistor R7, and the other end of the second capacitor C2 and the other end of the eighth resistor R8 are both grounded;

[0012] The first output terminal of the first switch Q1 is connected to the negative terminal of the first LED1, the positive terminal of the first diode D1, and the second pin of the relay K1; the other output terminal of the second switch Q1 is grounded.

[0013] The positive terminal of the first LED1 is connected to the 24V voltage terminal through the first resistor R1, and the negative terminal of the first diode D1 is connected to the 24V voltage terminal.

[0014] The first pin of relay K1 is connected to a 24V voltage terminal. The third pin of relay K1 is connected to one end of the third resistor R3, the fourth resistor R4, and the fifth resistor R5 respectively. The fourth pin of relay K1 is left floating. The fifth pin of relay K1 constitutes the first output terminal X1 of the switch control module. The second pin of relay K1 is also connected to the control terminal of the second switch Q2 through the second resistor R2. The first output terminal of the second switch Q2 is connected to the ON_OFF switch, and the second output terminal of the second switch Q2 is grounded.

[0015] The other ends of the third resistor R3, the fourth resistor R4, and the fifth resistor R5 constitute the second output terminal X2 of the switch control module.

[0016] In one embodiment, the power supply module includes: a tenth diode D10, a first capacitor C1, and a battery; the welding and cutting workstation coil includes: a first coil K2, a second coil K3, and a third coil K4; wherein:

[0017] The positive terminal of the battery forms the PT2 terminal, and the negative terminal of the battery forms the PT3 terminal. The PT2 terminal is connected to the first output terminal X1 of the switch control module, the third pin of the first coil K2, the third pin of the second coil K3, and the third pin of the third coil K4, respectively.

[0018] The fourth pin of the first coil K2 is connected to the fourth pin of the second coil K3, the fourth pin of the third coil K4, the second output terminal X2 of the switch control module, and the positive terminal of the first capacitor C1, respectively.

[0019] The positive terminal of the first capacitor C1 is connected to the first output terminal PT4 of the power supply module, and the negative terminal of the first capacitor C1, the second output terminal PT3 of the power supply module, and the PT3 terminal are all grounded.

[0020] The second pin of the first coil K2, the second pin of the second coil K3, and the second pin of the third coil K4 constitute the third output terminal X3 of the power supply module;

[0021] The second pin of the first coil K2 is connected to the negative terminal of the tenth diode D10, and the positive terminal of the tenth diode D10, the first pin of the first coil K2, the first pin of the second coil K3, and the first pin of the third coil K4 are all grounded.

[0022] In one embodiment, the soft-start module includes: a third switch Q3, a Zener diode Q4, a second LED2, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a thirty-sixth resistor R36, an eleventh diode D11, and a thirty-eighth capacitor C38, wherein:

[0023] One end of the thirty-sixth resistor R36 is connected to the third output terminal X3 of the power supply module, the drain of the third switching transistor Q3, and one end of the twelfth resistor R12. The other end of the thirty-sixth resistor R36 is connected to the positive terminal of the second LED2, and the negative terminal of the second LED2 is grounded.

[0024] The source of the third switch Q3 is connected to the 24V voltage terminal. The gate of the third switch Q3 is connected to one end of the thirteenth resistor R13 and the negative terminal of the Zener diode Q4. The other end of the thirteenth resistor R13 is also connected to the 24V voltage terminal.

[0025] The other end of the twelfth resistor R12 is connected to the positive terminal of the eleventh diode D11. The negative terminal of the eleventh diode D11 is connected to one end of the tenth resistor R10, the thirty-eighth capacitor C38, and the eleventh resistor R11, respectively. The other end of the tenth resistor R10 is connected to the PT4 terminal through the ninth resistor R9. The other ends of the thirty-eighth capacitor C38 and the eleventh resistor R11 are both grounded.

[0026] One end of the eleventh resistor R11 is also connected to the switch ON_OFF and the control terminal of the Zener diode Q4. The positive terminal of the Zener diode Q4 is grounded, and the control terminal of the Zener diode Q4 constitutes a reference point.

[0027] In one embodiment, when the fourth pin of the signal input port CN1 in the switch control module is at a high potential, the first switch Q1 is in the on state, the first LED1 is in the lit state, and the relay K1 is in the working state; wherein:

[0028] When the relay K1 switches from the non-working state to the working state, the corresponding connection circuit between the power supply module and the soft start module switches from the disconnected state to the connected state.

[0029] In one embodiment, when the connection circuit between the power supply module and the soft start module switches from the disconnected state to the on state, the voltage at the control terminal of the Zener diode Q4 in the soft start circuit gradually increases as the positive voltage of the first capacitor C1 increases. When the voltage at the reference point is greater than the preset base station value, the Zener diode Q4 is turned on.

[0030] When the Zener diode Q4 is in the on state, the connection circuit between the power supply module and the welding and cutting workstation coil is connected.

[0031] In one embodiment, when the Zener diode Q4 is in the on state, the battery continuously supplies power to the second LED2 and the welding and cutting workstation coil.

[0032] In one embodiment, when the battery stops outputting power, the fourth pin of the signal input port CN1 in the switch control module switches from a high potential to a low potential, the first switch Q1 switches from an on state to an off state, the first LED1 is off, the second switch Q2 switches from an off state to an on state, and the relay K1 switches from an operating state to a non-operating state; wherein:

[0033] When the relay K1 switches from the working state to the non-working state, the voltage at the control terminal of the Zener diode Q4 in the soft start circuit gradually decreases. When the voltage at the reference point is not greater than the preset reference value, the battery stops supplying power to the welding and cutting workstation coil.

[0034] In one embodiment, when the battery's output voltage is lower than a preset lower limit, the fourth pin of the signal input port CN1 in the switch control module remains at a high potential, and the relay K1 is in the working state; wherein:

[0035] In the slow-start circuit, the voltage at the control terminal of the Zener diode Q4 gradually decreases. When the voltage at the reference point is not greater than the preset reference value, the battery stops supplying power to the welding and cutting workstation coil.

[0036] Secondly, embodiments of this application also provide a welding and cutting device, including a self-recognition soft-start circuit as described in any one of the first aspects.

[0037] The aforementioned self-recognition soft-start circuit and welding and cutting equipment, due to the soft-start module, can delay the power supply module from supplying power to the welding and cutting workstation coil based on the change in reference point voltage when the switch control module starts. This solves the current surge problem in the new energy welding and cutting system during startup, improves the stability and service life of the new energy welding and cutting system, and significantly reduces system energy consumption, thus having broad application prospects. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the structure of a self-recognition soft-start circuit provided in an embodiment of this application;

[0040] Figure 2 This is a schematic diagram of the structure of a switch control module provided in one embodiment of this application;

[0041] Figure 3 This is a schematic diagram of the structure of a power supply module provided in one embodiment of this application;

[0042] Figure 4 This is a schematic diagram of the structure of a slow-start module provided in one embodiment of this application;

[0043] Figure 5 This is a schematic diagram of the structure of a self-recognition soft-start circuit provided in another embodiment of this application. Detailed Implementation

[0044] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0046] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0047] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0048] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0049] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0050] Welding machines need to operate under high current, resulting in significant inrush current during startup. With the development of new energy technologies, welding and cutting equipment based on new energy systems has emerged. Traditional technologies typically employ delay circuits for soft startup. However, this control method still cannot solve the problem of large current surges during welder startup. Especially when applied to new energy systems, due to their unique operating conditions and requirements, surge current surges can severely impact the stability and lifespan of these systems.

[0051] For example, Figure 1 This is a schematic diagram of the structure of a self-recognition soft-start circuit provided in an embodiment of this application, as shown below. Figure 1As shown, it may include: a switch control module 101, a power supply module 102, and a soft-start module 103; the switch control module 101 is electrically connected to the power supply module 102 and the soft-start module 103; wherein: the switch control module 101 is used to conduct the connection circuit of the soft-start module 103 according to the input potential signal when the welding and cutting workstation is in working state; the soft-start module 103 is used to collect the voltage of a reference point, and when the voltage of the reference point is greater than a preset reference value, conduct the connection circuit between the power supply module 102 and the welding and cutting workstation coil; the soft-start module 103 is also used to cut off the connection circuit between the power supply module 102 and the welding and cutting workstation coil when the voltage of the reference point is not greater than the preset reference value.

[0052] For example, Figure 2 This is a schematic diagram of the structure of a switch control module provided in one embodiment of this application, as shown below. Figure 2 As shown, the switch control module includes: a signal input port CN1, a relay K1, a first switch Q1, a second switch Q2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a seventh resistor R7, an eighth resistor R8, a second capacitor C2, a first diode D1, and a first LED1. Specifically: the first pin of the signal input port CN1 is connected to a power supply; the first pin of the signal input port CN1 is grounded; the third pin of the signal input port CN1 is connected to a 24V voltage terminal; the fourth pin of the signal input port CN1 is connected through the seventh resistor R7 to one end of the second capacitor C2, one end of the eighth resistor R8, and the control terminal of the first switch Q1; the other ends of the second capacitor C2 and the eighth resistor R8 are both grounded; the first output terminal of the first switch Q1 is connected to the negative terminal of the first LED1 and the positive terminal of the first diode D1. The second pin of relay K1 and the other output terminal of the second switch Q1 are grounded; the positive terminal of the first LED1 is connected to the 24V voltage terminal through the first resistor R1, and the negative terminal of the first diode D1 is connected to the 24V voltage terminal; the first pin of relay K1 is connected to the 24V voltage terminal; the third pin of relay K1 is connected to one end of the third resistor R3, the fourth resistor R4, and the fifth resistor R5 respectively; the fourth pin of relay K1 is left floating; the fifth pin of relay K1 constitutes the first output terminal X1 of the switch control module; the second pin of relay K1 is also connected to the control terminal of the second switch Q2 through the second resistor R2; the first output terminal of the second switch Q2 is connected to the ON / OFF switch; the second output terminal of the second switch Q2 is grounded; the other end of the third resistor R3, the fourth resistor R4, and the fifth resistor R5 constitutes the second output terminal X2 of the switch control module.

[0053] For example, Figure 3 This is a schematic diagram of the power supply module provided in one embodiment of this application, as shown below. Figure 3 As shown, the power supply module includes: a tenth diode D10, a first capacitor C1, and a battery; the welding and cutting workstation coil includes: a first coil K2, a second coil K3, and a third coil K4; wherein: the positive terminal of the battery forms the PT2 terminal, and the negative terminal of the battery forms the PT3 terminal; the PT2 terminal is respectively connected to the first output terminal X1 of the switch control module, the third pin of the first coil K2, the third pin of the second coil K3, and the third pin of the third coil K4; the fourth pin of the first coil K2 is respectively connected to the fourth pin of the second coil K3, the fourth pin of the third coil K4, the second output terminal X2 of the switch control module, and the first coil K4. The positive terminal of capacitor C1 is connected; the positive terminal of the first capacitor C1 is connected to the first output terminal PT4 of the power supply module, and the negative terminal of the first capacitor C1, the second output terminal PT3 of the power supply module, and the PT3 terminal are all grounded; the second pin of the first coil K2, the second pin of the second coil K3, and the second pin of the third coil K4 constitute the third output terminal X3 of the power supply module; the second pin of the first coil K2 is connected to the negative terminal of the tenth diode D10, and the positive terminal of the tenth diode D10, the first pin of the first coil K2, the first pin of the second coil K3, and the first pin of the third coil K4 are all grounded.

[0054] For example, Figure 4 This is a schematic diagram of the structure of a slow-start module provided in an embodiment of this application, as shown below. Figure 4As shown, the soft-start module includes: a third switch Q3, a Zener diode Q4, a second LED2, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a thirty-sixth resistor R36, an eleventh diode D11, and a thirty-eighth capacitor C38. One end of the thirty-sixth resistor R36 is connected to the third output terminal X3 of the power supply module, the drain of the third switch Q3, and one end of the twelfth resistor R12. The other end of the thirty-sixth resistor R36 is connected to the positive terminal of the second LED2, and the negative terminal of the second LED2 is grounded. The source of the third switch Q3 is connected to a 24V voltage terminal, and the gate of the third switch Q3 is connected to one end of the thirteenth resistor R13. The negative terminal of the Zener diode Q4 is connected to the 24V voltage terminal, and the other end of the thirteenth resistor R13 is also connected to the 24V voltage terminal. The other end of the twelfth resistor R12 is connected to the positive terminal of the eleventh diode D11. The negative terminal of the eleventh diode D11 is connected to one end of the tenth resistor R10, the thirty-eighth capacitor C38, and the eleventh resistor R11. The other end of the tenth resistor R10 is connected to the PT4 terminal through the ninth resistor R9. The other ends of the thirty-eighth capacitor C38 and the eleventh resistor R11 are both grounded. One end of the eleventh resistor R11 is also connected to the ON / OFF switch and the control terminal of the Zener diode Q4. The positive terminal of the Zener diode Q4 is grounded. The control terminal of the Zener diode Q4 constitutes a reference point.

[0055] For example, Figure 5 This is a schematic diagram of the structure of a self-recognition soft-start circuit provided in another embodiment of this application, as shown below. Figure 5 As shown, when the fourth pin of the signal input port CN1 in the switch control module is at a high potential, the first switch Q1 is in the on state, the first LED1 is in the lit state, and the relay K1 is in the working state; wherein: when the relay K1 switches from the non-working state to the working state, the corresponding connection circuit between the power supply module and the soft start module switches from the disconnected state to the on state.

[0056] Combination Figure 5 It can be seen that when the workstation is working, that is, when the battery is connected, the fourth pin of the signal input terminal CN1 outputs a high potential signal, which causes the first switch Q1 to work, the first LED1 to light up, and the relay K1 to work.

[0057] In this embodiment, when the connection circuit between the power supply module and the soft start module switches from the disconnected state to the on state, the voltage at the control terminal of the Zener diode Q4 in the soft start circuit gradually increases as the positive voltage of the first capacitor C1 increases. When the voltage at the reference point is greater than the preset base station value, the Zener diode Q4 is turned on. When the Zener diode Q4 is in the on state, the connection circuit between the power supply module and the welding and cutting workstation coil is turned on.

[0058] In this embodiment, when the Zener diode Q4 is in the on state, the battery continuously supplies power to the second LED2 and the welding and cutting workstation coil.

[0059] For example, the battery can be 48V DC. Combined with Figure 5 It can be seen that when relay K1 is in working state, the power supply outputs electrical energy through the third resistor R3, the fourth resistor R4, and the fifth resistor R5 through the PT4 terminal. The point cloud of the PT4 terminal is divided by the ninth resistor R9, the tenth resistor R10, and the eleventh resistor R11, so that the voltage of the control terminal (point R, i.e. the reference point) of the Zener diode Q4 changes according to the change of the voltage at one end of the first capacitor C1.

[0060] In this embodiment, the Zener diode Q4 can be a TL431 voltage regulator integrated device, which can make full use of the working characteristics of the TL431 voltage regulator integrated circuit. When the voltage at point R is higher than its reference value of 2.5V, the Zener diode Q4 works. By utilizing this feature of the TL431 chip, the soft start is perfectly realized.

[0061] In this embodiment, a preset reference value of 2.5V can be set. When the TP4 terminal is at a high potential, and the voltage at point R exceeds 2.5V, a self-recognition soft start can be achieved. When the Zener diode Q4 is turned on, the third switch Q3 is turned on, the second LED2 is lit, and the +24V power supply powers the coils of K2, K3, and K4.

[0062] In this embodiment, if the voltage at point R is always higher than the preset reference value, the battery will continue to supply power to the coil.

[0063] In this embodiment, the first capacitor C1 also has a filtering function. The electrical energy output by the battery is filtered by the first capacitor C1 and then continuously supplies power to the welding and cutting workstation coil and the second LED2.

[0064] In one optional implementation, when the battery stops outputting power, the fourth pin of the signal input port CN1 in the switch control module switches from a high potential to a low potential, the first switch Q1 switches from an on state to an off state, the first LED1 is off, the second switch Q2 switches from an off state to an on state, and the relay K1 switches from an operating state to an inoperable state. When the relay K1 switches from an operating state to an inoperable state, the voltage at the control terminal of the Zener diode Q4 in the soft-start circuit gradually decreases. When the voltage at the reference point is not greater than a preset reference value, the battery stops supplying power to the welding and cutting workstation coil.

[0065] In this embodiment, when the battery stops outputting, the fourth pin of the signal input terminal CN1 switches to a low potential. When the first switch Q1 is not working, the B point of the second switch Q2 becomes a high potential, thereby making the second switch Q2 work and pulling down the R point potential of the Zener diode Q4. The third switch Q3 is not working, the relay is disconnected, and the battery stops outputting.

[0066] In another optional implementation, when the output voltage of the battery is lower than a preset lower limit, the fourth pin of the signal input port CN1 in the switch control module remains at a high potential, and the relay K1 is in the working state; wherein: the voltage at the control terminal of the Zener diode Q4 in the soft start circuit gradually decreases, and when the voltage at the reference point is not greater than a preset reference value, the battery stops supplying power to the welding and cutting workstation coil.

[0067] In this embodiment, not only is inrush current reduced, but battery depletion protection is also implemented. When the battery voltage drops below 43V, and relay K1 is activated, the voltage at point R, the control terminal of Zener diode Q4, drops below 2.5V, causing Q4 to fail to operate. This effectively protects the battery and extends its lifespan.

[0068] It is understood that the above circuit structures can also take other forms, and are not limited to the forms already mentioned in the above embodiments, as long as they can achieve the function of soft start.

[0069] In addition, embodiments of this application also provide welding and cutting equipment, including the self-recognition soft-start circuit in the above embodiments.

[0070] In this embodiment, due to the inclusion of a slow-start module, the power supply module can delay supplying power to the welding and cutting workstation coil based on changes in the reference point voltage when the switch control module starts. This solves the current surge problem during welding machine startup in new energy welding and cutting systems, improves the stability and service life of the new energy welding and cutting systems, and significantly reduces system energy consumption, thus having broad application prospects.

[0071] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A self-recognition soft-start circuit, characterized in that, include: The system comprises a switch control module, a power supply module, and a soft-start module; the switch control module is electrically connected to the power supply module and the soft-start module; wherein: The switch control module is used to activate the connection circuit of the soft-start module according to the input potential signal when the welding and cutting workstation is in operation. The slow-start module is used to collect the voltage of the reference point, and when the voltage of the reference point is greater than the preset reference value, the connection circuit between the power supply module and the welding and cutting workstation coil is turned on. The slow-start module is also used to disconnect the connection circuit between the power supply module and the welding and cutting workstation coil when the voltage at the reference point is not greater than a preset reference value.

2. The self-recognition soft-start circuit according to claim 1, characterized in that, The switch control module includes: a signal input port CN1, a relay K1, a first switch Q1, a second switch Q2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a seventh resistor R7, an eighth resistor R8, a second capacitor C2, a first diode D1, and a first LED1, wherein: The first pin of the signal input port CN1 is connected to the power supply, the first pin of the signal input port CN1 is grounded, the third pin of the signal input port CN1 is connected to the 24V voltage terminal, the fourth pin of the signal input port CN1 is connected to one end of the second capacitor C2, one end of the eighth resistor R8, and the control terminal of the first switch Q1 through the seventh resistor R7, and the other end of the second capacitor C2 and the other end of the eighth resistor R8 are both grounded; The first output terminal of the first switch Q1 is connected to the negative terminal of the first LED1, the positive terminal of the first diode D1, and the second pin of the relay K1; the other output terminal of the second switch Q1 is grounded. The positive terminal of the first LED1 is connected to the 24V voltage terminal through the first resistor R1, and the negative terminal of the first diode D1 is connected to the 24V voltage terminal. The first pin of relay K1 is connected to a 24V voltage terminal. The third pin of relay K1 is connected to one end of the third resistor R3, the fourth resistor R4, and the fifth resistor R5 respectively. The fourth pin of relay K1 is left floating. The fifth pin of relay K1 constitutes the first output terminal X1 of the switch control module. The second pin of relay K1 is also connected to the control terminal of the second switch Q2 through the second resistor R2. The first output terminal of the second switch Q2 is connected to the ON_OFF switch, and the second output terminal of the second switch Q2 is grounded. The other ends of the third resistor R3, the fourth resistor R4, and the fifth resistor R5 constitute the second output terminal X2 of the switch control module.

3. The self-recognition soft-start circuit according to claim 2, characterized in that, The power supply module includes: a tenth diode D10, a first capacitor C1, and a battery; the welding and cutting workstation coil includes: a first coil K2, a second coil K3, and a third coil K4; wherein: The positive terminal of the battery forms the PT2 terminal, and the negative terminal of the battery forms the PT3 terminal. The PT2 terminal is connected to the first output terminal X1 of the switch control module, the third pin of the first coil K2, the third pin of the second coil K3, and the third pin of the third coil K4, respectively. The fourth pin of the first coil K2 is connected to the fourth pin of the second coil K3, the fourth pin of the third coil K4, the second output terminal X2 of the switch control module, and the positive terminal of the first capacitor C1, respectively. The positive terminal of the first capacitor C1 is connected to the first output terminal PT4 of the power supply module, and the negative terminal of the first capacitor C1, the second output terminal PT3 of the power supply module, and the PT3 terminal are all grounded. The second pin of the first coil K2, the second pin of the second coil K3, and the second pin of the third coil K4 constitute the third output terminal X3 of the power supply module; The second pin of the first coil K2 is connected to the negative terminal of the tenth diode D10, and the positive terminal of the tenth diode D10, the first pin of the first coil K2, the first pin of the second coil K3, and the first pin of the third coil K4 are all grounded.

4. The self-recognition soft-start circuit according to claim 3, characterized in that, The soft-start module includes: a third switch Q3, a Zener diode Q4, a second LED2, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a thirty-sixth resistor R36, an eleventh diode D11, and a thirty-eighth capacitor C38, wherein: One end of the thirty-sixth resistor R36 is connected to the third output terminal X3 of the power supply module, the drain of the third switching transistor Q3, and one end of the twelfth resistor R12. The other end of the thirty-sixth resistor R36 is connected to the positive terminal of the second LED2, and the negative terminal of the second LED2 is grounded. The source of the third switch Q3 is connected to the 24V voltage terminal. The gate of the third switch Q3 is connected to one end of the thirteenth resistor R13 and the negative terminal of the Zener diode Q4. The other end of the thirteenth resistor R13 is also connected to the 24V voltage terminal. The other end of the twelfth resistor R12 is connected to the positive terminal of the eleventh diode D11. The negative terminal of the eleventh diode D11 is connected to one end of the tenth resistor R10, the thirty-eighth capacitor C38, and the eleventh resistor R11, respectively. The other end of the tenth resistor R10 is connected to the PT4 terminal through the ninth resistor R9. The other ends of the thirty-eighth capacitor C38 and the eleventh resistor R11 are both grounded. One end of the eleventh resistor R11 is also connected to the switch ON_OFF and the control terminal of the Zener diode Q4. The positive terminal of the Zener diode Q4 is grounded, and the control terminal of the Zener diode Q4 constitutes a reference point.

5. The self-recognition soft-start circuit according to claim 4, characterized in that, When the fourth pin of the signal input port CN1 in the switch control module is at a high potential, the first switch Q1 is in the on state, the first LED1 is in the lit state, and the relay K1 is in the working state; wherein: When the relay K1 switches from the non-working state to the working state, the corresponding connection circuit between the power supply module and the soft start module switches from the disconnected state to the connected state.

6. The self-recognition soft-start circuit according to claim 5, characterized in that, When the connection circuit between the power supply module and the soft start module switches from the disconnected state to the on state, the voltage at the control terminal of the Zener diode Q4 in the soft start circuit gradually increases as the positive voltage of the first capacitor C1 increases. When the voltage at the reference point is greater than the preset base station value, the Zener diode Q4 turns on. When the Zener diode Q4 is in the on state, the connection circuit between the power supply module and the welding and cutting workstation coil is connected.

7. The self-recognition soft-start circuit according to claim 6, characterized in that, When the Zener diode Q4 is in the on state, the battery continuously supplies power to the second LED2 and the welding and cutting workstation coil.

8. The self-recognition soft-start circuit according to claim 7, characterized in that, When the battery stops outputting power, the fourth pin of the signal input port CN1 in the switch control module switches from a high potential to a low potential, the first switch Q1 switches from an on state to an off state, the first LED1 is off, the second switch Q2 switches from an off state to an on state, and the relay K1 switches from an operating state to an inoperable state; wherein: When the relay K1 switches from the working state to the non-working state, the voltage at the control terminal of the Zener diode Q4 in the soft start circuit gradually decreases. When the voltage at the reference point is not greater than the preset reference value, the battery stops supplying power to the welding and cutting workstation coil.

9. The self-recognition soft-start circuit according to claim 7, characterized in that, When the output voltage of the battery is lower than a preset lower limit, the fourth pin of the signal input port CN1 in the switch control module remains at a high potential, and the relay K1 is in the working state; wherein: In the soft-start circuit, the voltage at the control terminal of the Zener diode Q4 gradually decreases. When the voltage at the reference point is not greater than the preset reference value, the battery stops supplying power to the welding and cutting workstation coil.

10. A welding and cutting device, characterized in that, Includes the self-recognition soft-start circuit as described in any one of claims 1-9.

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