Common magnetic circuit reactance module, welding power supply device and welding machine

Abstract

The utility model discloses a common magnetic circuit reactance module, a welding power supply device and a welding machine, which comprise a first inductor and a second inductor which are mutually coupled, the head end of the first inductor is connected with the head end of the second inductor, and the tail end of the first inductor is connected with the tail end of the second inductor. The head end of the first inductor and the tail end of the second inductor are dotted terminals, main path current flows in from the head end of the first inductor and the head end of the second inductor at the same time, first branch current passes through the first inductor, second branch current passes through the second inductor, the first inductor can filter pulsation of the first branch current, and the first branch current can filter pulsation of the second branch current. The first inductor can filter the pulsation of the first branch current, the second inductor can filter the pulsation of the second branch current, reduce the electromagnetic interference of the main circuit current and provide a welding power supply for the welding gun, the first branch current and the second branch current synchronously flow into the head end of the first inductor and the head end of the second inductor, and the head end of the first inductor and the tail end of the second inductor are dotted terminals. Synchronous demagnetization can be realized, and the structure is simple.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, and in particular to a common magnetic circuit reactor module, a welding power supply device, and a welding machine. Background Technology

[0002] The welding power conversion circuit of a welding machine generally includes an inverter module, a transformer module, a rectifier module, and a reactor module. The AC power provided by the power grid is rectified and filtered, then inverted into high-frequency AC power by the inverter module. After being transformed by the transformer module and rectified by the rectifier module, it is output to the reactor module. After being filtered by the reactor module, it supplies power to the welding arc.

[0003] Previously, the applicant conducted research and development improvements on the inductor structure in the reactor module, such as... Figure 1 As shown, in actual use, it was found that there is still room for optimization in the previously proposed structural improvement. The previously proposed structure achieves demagnetization by coupling two inductors, but in terms of working principle, the two inductors (inductor L1 and inductor L2) or (inductor L3 and inductor L4) flow current asynchronously, which can only achieve asynchronous demagnetization. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a common magnetic circuit reactor module, a welding power supply device, and a welding machine, which achieves synchronous demagnetization, has a simple structure, and provides stable output welding power.

[0005] According to a first aspect embodiment of the present invention, a common magnetic circuit reactor module includes a first inductor and a second inductor coupled to each other, the first end of the first inductor and the first end of the second inductor being connected, the tail end of the first inductor and the tail end of the second inductor being connected, and the first end of the first inductor and the tail end of the second inductor being terminals with the same name.

[0006] A common magnetic circuit reactor module according to an embodiment of the present invention has at least the following beneficial effects:

[0007] This utility model relates to a common magnetic circuit reactor module. The first end of a first inductor and the first end of a second inductor are connected. The first end of the first inductor can be used to connect to the output terminal of the rectifier module of a welding power supply device, or it can be connected to the workpiece during the welding process of the welding machine. The main current flows in simultaneously from the first end of the first inductor and the first end of the second inductor. The first branch current passes through the first inductor, and the second branch current passes through the second inductor. Finally, the first branch current and the second branch current merge from the tail ends of the first inductor and the tail ends of the second inductor to form the main current. In this process, the first inductor can filter the pulsation of the first branch current, and the second inductor can filter the pulsation of the second branch current, reducing the electromagnetic interference of the main current and providing welding power for the welding torch. Since the first branch current and the second branch current flow into the first end of the first inductor and the first end of the second inductor synchronously, and the first end of the first inductor and the tail end of the second inductor are the same name terminals, synchronous demagnetization can be achieved, and the structure is simple.

[0008] According to some embodiments of the present invention, the common magnetic circuit reactance module further includes a magnetic core, and both the first inductor and the second inductor are wound on the magnetic core.

[0009] A welding power supply device according to a second aspect embodiment of the present invention includes at least one welding power supply module. Each welding power supply module includes a transformer module, a rectifier module, and a common magnetic circuit reactor module disclosed in any of the above embodiments. The transformer module includes at least a transformer assembly, which includes a primary winding and a first secondary winding coupled to each other. The rectifier module includes at least a first diode and a second diode. The anode of the first diode is connected to the beginning of the first secondary winding, and the anode of the second diode is connected to the end of the first secondary winding. The cathodes of the first diode and the second diode are connected. The beginning of the first inductor is connected to the cathode of the first diode, and the end of the first inductor is used to connect to a welding torch. Alternatively, the cathode of the first diode is used to connect to the welding torch, the beginning of the first inductor is connected to the center tap of the first secondary winding, and the end of the first inductor is used to connect to a workpiece.

[0010] The welding power supply device according to the embodiments of the present utility model has at least the following beneficial effects:

[0011] The welding power supply device of this utility model adopts the common magnetic circuit reactor module disclosed in any of the above embodiments to achieve synchronous demagnetization, with simple structure and stable output welding power.

[0012] According to some embodiments of the present invention, the transformer assembly further includes a second secondary coil coupled to the primary coil, the first end of the second secondary coil and the first end of the first secondary coil being of the same name, the anode of the first diode being connected to the first end of the second secondary coil, and the anode of the second diode being connected to the tail end of the second secondary coil.

[0013] According to some embodiments of this utility model, the transformer assembly further includes a second secondary coil coupled to the primary coil, the first end of the second secondary coil and the first end of the first secondary coil being of the same name; the rectifier module includes a first rectifier unit and a second rectifier unit; the first diode and the second diode constitute at least part of the first rectifier unit; the second rectifier unit includes a third diode and a fourth diode; there are two common magnetic circuit reactance modules; the negative terminals of the first diode and the second diode are connected and connected to the first end of the first inductor in the first common magnetic circuit reactance module; the positive terminal of the third diode is connected to the first end of the second secondary coil; the positive terminal of the fourth diode is connected to the tail end of the second secondary coil; the negative terminals of the third diode and the fourth diode are connected and connected to the first end of the first inductor in the second common magnetic circuit reactance module; the tail end of the first inductor is used to connect to a welding torch.

[0014] According to some embodiments of the present invention, the first rectifier unit and the second rectifier unit are full-wave rectifier units or full-bridge rectifier units.

[0015] According to some embodiments of the present invention, there are at least two welding power modules, wherein the first end of the first inductor in each of the multiple welding power modules is connected to the negative terminal of the first diode, and the tail ends of the first inductors in the multiple welding power modules are interconnected and used to connect to the welding torch; or, the negative terminals of the first diodes in the multiple welding power modules are interconnected and used to connect to the welding torch, the first end of the first inductor in each welding power module is connected to the center tap of its corresponding first secondary coil, and the tail ends of each first inductor are interconnected and used to connect to the workpiece.

[0016] According to some embodiments of the present invention, each of the first inductors and each of the second inductors in the plurality of common magnetic circuit reactor modules are wound on the same magnetic core.

[0017] A welding power supply device according to a third aspect embodiment of the present invention includes at least one welding power supply module. Each welding power supply module includes a transformer module, a rectifier module, and two common magnetic circuit reactor modules disclosed in any of the above embodiments. The transformer module includes at least a transformer assembly, which includes a primary winding, a first secondary winding, and a second secondary winding coupled to each other. The starting ends of the first secondary winding and the second secondary winding are of the same name. The rectifier module includes a first rectifier unit and a second rectifier unit. The first rectifier unit includes at least a first diode and a second diode, and the second rectifier unit includes at least a third diode and a fourth diode. The tube has the following configuration: the anode of the first diode is connected to the beginning of the first secondary coil; the anode of the second diode is connected to the end of the first secondary coil; the anode of the third diode is connected to the beginning of the second secondary coil; the anode of the fourth diode is connected to the end of the second secondary coil; the cathode of the first diode is connected to the cathode of the third diode and the beginning of the first inductor in the first common magnetic circuit reactor module; the cathode of the second diode is connected to the cathode of the fourth diode and the beginning of the first inductor in the second common magnetic circuit reactor module; and the ends of the first inductors in both common magnetic circuit reactor modules are used to connect to the welding torch.

[0018] The welding power supply device according to the embodiments of the present utility model has at least the following beneficial effects:

[0019] The welding power supply device of this utility model adopts the common magnetic circuit reactor module disclosed in any of the above embodiments to achieve synchronous demagnetization, with simple structure and stable output welding power.

[0020] The welding machine according to the fourth aspect of the present invention includes the welding power supply device disclosed in any of the above embodiments.

[0021] The welding machine according to the embodiments of this utility model has at least the following beneficial effects:

[0022] The welding machine of this utility model uses the welding power supply device disclosed in any of the above embodiments to achieve synchronous demagnetization, reduce electromagnetic interference, and stabilize the output welding power.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1A schematic diagram of the circuit structure of a traditional welding power supply device;

[0026] Figure 2 This is a circuit diagram of the input rectifier module and inverter module of one embodiment of the welding power supply device of this utility model;

[0027] Figure 3 This is a circuit diagram of the first embodiment of the welding power supply device of this utility model;

[0028] Figure 4 This is a circuit diagram of the second embodiment of the welding power supply device of this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of one embodiment of the common magnetic circuit reactor module of this utility model;

[0030] Figure 6 This is a schematic diagram of another embodiment of the common magnetic circuit reactor module of this utility model;

[0031] Figure 7 This is a circuit diagram of the third embodiment of the welding power supply device of this utility model;

[0032] Figure 8 This is a circuit diagram of the fourth embodiment of the welding power supply device of this utility model;

[0033] Figure 9 This is a circuit diagram of the fifth embodiment of the welding power supply device of this utility model;

[0034] Figure 10 This is a circuit diagram of the sixth embodiment of the welding power supply device of this utility model;

[0035] Figure 11 This is a circuit diagram of the seventh embodiment of the welding power supply device of this utility model;

[0036] Figure 12 This is a circuit diagram of the eighth embodiment of the welding power supply device of this utility model;

[0037] Figure 13 This is a circuit diagram of the ninth embodiment of the welding power supply device of this utility model;

[0038] Figure 14 This is a circuit diagram of the tenth embodiment of the welding power supply device of this utility model;

[0039] Figure 15 This is a circuit diagram of the eleventh embodiment of the welding power supply device of this utility model;

[0040] Figure 16 This is a circuit diagram of the twelfth embodiment of the welding power supply device of this utility model.

[0041] Figure label:

[0042] Common magnetic circuit reactor module 100; first inductor 110; second inductor 120; magnetic core 130; input rectifier module 200; inverter module 300; transformer module 400; primary coil 410; first secondary coil 420; second secondary coil 430; rectifier module 500; first rectifier unit 510; second rectifier unit 520; first diode 610; second diode 620; third diode 630; fourth diode 640; fifth diode 650; sixth diode 660; seventh diode 670; eighth diode 680; welding power supply module 700; welding torch 810; workpiece 820; electric arc 830. Detailed Implementation

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0044] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] like Figure 2 - Figure 16 As shown, a common magnetic circuit reactance module 100 according to a first aspect embodiment of the present invention includes a first inductor 110 and a second inductor 120 coupled to each other. The first end of the first inductor 110 and the first end of the second inductor 120 are connected, and the tail end of the first inductor 110 and the tail end of the second inductor 120 are connected. The first end of the first inductor 110 and the tail end of the second inductor 120 are terminals with the same name.

[0048] In this invention, both the first inductor 110 and the second inductor 120 can be formed by winding coils. The first end of the first inductor 110 and the first end of the second inductor 120 are first connected and then disposed on a first connection terminal. The last end of the first inductor 110 and the last end of the second inductor 120 are first connected and then disposed on a second connection terminal. External circuit components can be directly connected to the first connection terminal to access the first ends of the first inductor 110 and the second inductor 120, respectively. Similarly, external circuit components can be directly connected to the second connection terminal to access the last ends of the first inductor 110 and the second inductor 120, respectively. In some embodiments of this invention, the first ends of the first inductor 110 and the second inductor 120 can also be left unconnected. External circuit components can also be connected to the first ends of the first inductor 110 and the second inductor 120 via wires, and the same applies to the last ends of the first inductor 110 and the second inductor 120.

[0049] In this utility model, the common magnetic circuit reactor module 100 has the first end of a first inductor 110 and the first end of a second inductor 120 connected together. The first end of the first inductor 110 can be connected to the output terminal of the rectifier module 500 of the welding power supply device, or it can be connected to the workpiece 820 during the welding process. The main current flows in simultaneously from the first end of the first inductor 110 and the first end of the second inductor 120. The first branch current passes through the first inductor 110, and the second branch current passes through the second inductor 120. Finally, the first branch current and the second branch current return to the first inductor 110. The tail end of the first inductor 110 and the tail end of the second inductor 120 merge to form the main current. During this process, the first inductor 110 can filter the pulsation of the first branch current, and the second inductor 120 can filter the pulsation of the second branch current, reducing the electromagnetic interference of the main current and providing welding power to the welding torch 810. Since the first branch current and the second branch current flow into the head end of the first inductor 110 and the head end of the second inductor 120 synchronously, and the head end of the first inductor 110 and the tail end of the second inductor 120 are the same name ends, synchronous demagnetization can be achieved, and the structure is simple.

[0050] In some embodiments of this utility model, the common magnetic circuit reactance module 100 further includes a magnetic core 130, on which the first inductor 110 and the second inductor 120 are both wound. The magnetic core 130 can be made of iron core and can be rod-shaped, ring-shaped, or H-shaped. The first inductor 110 and the second inductor 120 in multiple common magnetic circuit reactance modules 100 can be wound on the same magnetic core 130.

[0051] like Figure 5 , 6 As shown, the different winding directions of the first inductor 110 and the second inductor 120 or the different circuit wiring results in different current input directions, which can form different common magnetic circuit reactance module 100 structures. However, in the final circuit structure, the beginning end of the first inductor 110 and the end end of the second inductor 120 need to be the same name end, so that when the current flows in from the beginning end of the first inductor 110 and the beginning end of the second inductor 120, the magnetic flux generated by the first inductor 110 and the second inductor 120 is opposite to each other in the magnetic core 130. Thus, during the process of modulating the welding current for the welding machine, the opposite magnetic fluxes can cancel each other out.

[0052] According to the welding power supply device of the second aspect embodiment of the present invention, such as Figure 2 , 3 As shown in figures 4, 7, 8, 9, 12, 13, and 14, each welding power supply module 700 includes at least one welding power supply module 700. Each welding power supply module 700 includes a transformer module 400, a rectifier module 500, and a common magnetic circuit reactor module 100 disclosed in any of the above embodiments. The transformer module 400 includes at least a transformer assembly, which includes a primary winding 410 and a first secondary winding 420 coupled to each other. The rectifier module 500 includes at least a first diode 610 and a second diode 620. The anode of the first diode 610 is connected to the first end of the first secondary winding 420. The positive terminal of the second diode 620 is connected to the tail end of the first secondary coil 420, and the negative terminal of the first diode 610 is connected to the negative terminal of the second diode 620. The first end of the first inductor 110 is connected to the negative terminal of the first diode 610, and the tail end of the first inductor 110 is used to connect to the welding torch 810. Alternatively, the negative terminal of the first diode 610 is used to connect to the welding torch 810, the first end of the first inductor 110 is connected to the center tap of the first secondary coil 420, and the tail end of the first inductor 110 is used to connect to the workpiece 820.

[0053] Generally speaking, such as Figure 2As shown, the welding power module 700 also includes an input rectifier module 200 and an inverter module 300. The input rectifier module 200 can also be composed of diodes. The input terminal of the input rectifier module 200 is connected to an AC power supply. The input rectifier module 200 rectifies the AC power supply. The inverter module 300 can be composed of multiple semiconductor switching transistors. It inverts the DC power output from the input rectifier module 200, outputs AC power to the transformer assembly for transformation, and then outputs it to the rectifier module 500.

[0054] The first secondary coil 420 can be an integrated transformer coil with a center tap, or it can be a two-section coil unit with the two sections connected and the connection point forming a center tap.

[0055] In some embodiments of this utility model, such as Figure 3 As shown, the first end of the first inductor 110 is connected to the negative terminal of the first diode 610, and the tail end of the first inductor 110 is used to connect to the welding torch 810. After the rectifier module 500 outputs the welding current, it first passes through the common magnetic circuit reactance module 100. The common magnetic circuit reactance module 100 filters out the pulsation of the welding current and reduces electromagnetic interference. The welding current is discharged through the welding torch 810 to form an electric arc 830 on the workpiece 820 to complete the welding.

[0056] In some embodiments of this utility model, such as Figure 4 As shown, the negative terminal of the first diode 610 is used to connect to the welding torch 810, the first end of the first inductor 110 is connected to the center tap of the first secondary coil 420, and the tail end of the first inductor 110 is used to connect to the workpiece 820. The welding torch 810 discharges to the workpiece 820 to form an arc 830. A circuit is formed between the transformer module 400, the rectifier module 500, the welding torch 810, the workpiece 820, the common magnetic circuit reactor module 100, and the center tap. The welding current flows through the circuit, and the common magnetic circuit reactor module 100 can also filter out the pulsation of the welding current and reduce electromagnetic interference.

[0057] The welding power supply device of this utility model adopts the common magnetic circuit reactor module 100 disclosed in any of the above embodiments in the welding power supply module 700 to achieve synchronous demagnetization, with simple structure and stable output welding power.

[0058] In some embodiments of this utility model, such as Figure 7 As shown, there can be multiple first diodes 610, such as two or three, and multiple first diodes 610 are connected in parallel. Similarly, there can also be multiple second diodes 620, such as two or three, and multiple second diodes 620 are connected in parallel.

[0059] In some embodiments of this utility model, such as Figure 8As shown, the transformer assembly also includes a second secondary coil 430 coupled to the primary coil 410. The first end of the second secondary coil 430 and the first end of the first secondary coil 420 are the same name ends. The positive terminal of the first diode 610 is connected to the first end of the second secondary coil 430, and the positive terminal of the second diode 620 is connected to the tail end of the second secondary coil 430.

[0060] The primary coil 410 is connected to an AC power source. The currents output from the first end of the first secondary coil 420 and the first end of the second secondary coil 430 can both pass through the first diode 610 before entering the common magnetic circuit reactor module 100 for filtering. Similarly, the currents output from the tail end of the first secondary coil 420 and the tail end of the second secondary coil 430 can both pass through the first diode 610 before entering the common magnetic circuit reactor module 100 for filtering.

[0061] In some embodiments of this utility model, such as Figure 9 As shown, the transformer assembly further includes a second secondary coil 430 coupled to the primary coil 410. The starting ends of the second secondary coil 430 and the first secondary coil 420 are of the same name. The rectifier module 500 includes a first rectifier unit 510 and a second rectifier unit 520. The first diode 610 and the second diode 620 constitute at least part of the first rectifier unit 510. The second rectifier unit 520 includes a third diode 630 and a fourth diode 640. The common magnetic circuit reactance module 100 has two components. The negative diode 610... The cathode of the first diode 630 is connected to the cathode of the second diode 620 and to the beginning of the first inductor 110 in the first common magnetic circuit reactor module 100. The anode of the third diode 630 is connected to the beginning of the second secondary coil 430. The anode of the fourth diode 640 is connected to the end of the second secondary coil 430. The cathodes of the third diode 630 and the fourth diode 640 are connected to the beginning of the first inductor 110 in the second common magnetic circuit reactor module 100. The end of the first inductor 110 is used to connect to the welding torch 810.

[0062] Two common magnetic circuit reactor modules 100 can be used, corresponding one-to-one with the first secondary coil 420 and the second secondary coil 430. When current is output from the beginning of the first secondary coil 420 and the beginning of the second secondary coil 430, the current output from the beginning of the first secondary coil 420 flows into the first common magnetic circuit reactor module 100, and the current output from the beginning of the second secondary coil 430 flows into the second common magnetic circuit reactor module 100.

[0063] In some embodiments of this utility model, the first rectifier unit 510 and the second rectifier unit 520 are full-wave rectifier units or full-bridge rectifier units.

[0064] like Figure 3 , 4 As shown in Figures 7, 8, and 9, the first rectifier unit 510 and the second rectifier unit 520 are full-wave rectifier units.

[0065] And in Figure 12 , 13 In 14, the first rectifier unit 510 and the second rectifier unit 520 are full-bridge rectifier units. The first rectifier unit 510 also includes a fifth diode 650 and a sixth diode 660. The positive terminals of the fifth diode 650 and the sixth diode 660 are connected and used to connect to the workpiece 820 or to connect to the center tap of the first secondary coil 420. The negative terminal of the fifth diode 650 is connected to the beginning of the first secondary coil 420 and the positive terminal of the first diode 610, respectively. The negative terminal of the sixth diode 660 is connected to the end of the first secondary coil 420 and the positive terminal of the second diode 620, respectively.

[0066] The second rectifier unit 520 also includes a seventh diode 670 and an eighth diode 680. The positive terminals of the seventh diode 670 and the eighth diode 680 are connected and used to connect to the workpiece 820 or to the center tap of the second secondary coil 430. The negative terminal of the seventh diode 670 is connected to the beginning of the second secondary coil 430 and the positive terminal of the third diode 630, respectively. The negative terminal of the eighth diode 680 is connected to the end of the second secondary coil 430 and the positive terminal of the fourth diode 640, respectively.

[0067] In some embodiments of this utility model, such as Figure 2 , 3 As shown in Figures 4, 7, 8, 9, 12, 13, and 14, there are at least two welding power modules 700. The first ends of the first inductors 110 in each of the multiple welding power modules 700 are connected to the negative terminals of the first diodes 610, and the tail ends of the first inductors 110 in the multiple welding power modules 700 are interconnected and used to connect to the welding torch 810. Alternatively, the negative terminals of the first diodes 610 in the multiple welding power modules 700 are interconnected and used to connect to the welding torch 810, the first end of the first inductor 110 in each welding power module 700 is connected to the center tap of its corresponding first secondary coil 420, and the tail ends of each first inductor 110 are interconnected and used to connect to the workpiece 820.

[0068] In some embodiments of this utility model, such as Figure 5 , 6As shown, each of the first inductors 110 and each of the second inductors 120 in the multiple common magnetic circuit reactor modules 100 are wound on the same magnetic core 130, thereby saving the volume of multiple common magnetic circuit reactor modules 100, making the structure compact and reducing the space occupied.

[0069] According to the welding power supply device of the third aspect embodiment of the present invention, such as Figure 10 , 11 As shown in Figures 15 and 16, each welding power module 700 includes at least one welding power module 700. Each welding power module 700 includes a transformer module 400, a rectifier module 500, and two common magnetic circuit reactor modules 100 disclosed in any of the above embodiments. The transformer module 400 includes at least a transformer assembly, which includes a primary winding 410, a first secondary winding 420, and a second secondary winding 430 coupled to each other. The first end of the first secondary winding 420 and the first end of the second secondary winding 430 are terminals with the same name. The rectifier module 500 includes a first rectifier unit 510 and a second rectifier unit 520. The first rectifier unit 510 includes at least a first diode 610 and a second diode 620, and the second rectifier unit 520 includes at least a third diode 630 and a fourth diode 640. The anode of a diode 610 is connected to the beginning of the first secondary coil 420, the anode of a second diode 620 is connected to the end of the first secondary coil 420, the anode of a third diode 630 is connected to the beginning of the second secondary coil 430, and the anode of a fourth diode 640 is connected to the end of the second secondary coil 430. The cathode of the first diode 610 is connected to the cathode of the third diode 630 and the beginning of the first inductor 110 in the first common magnetic circuit reactor module 100, respectively. The cathode of the second diode 620 is connected to the cathode of the fourth diode 640 and the beginning of the first inductor 110 in the second common magnetic circuit reactor module 100, respectively. The ends of the first inductors 110 in both common magnetic circuit reactor modules 100 are used to connect to the welding torch 810.

[0070] The same common magnetic circuit reactor module 100 can be connected to the first rectifier unit 510 and the second rectifier unit 520 respectively, which can also filter out the pulsation of welding current and reduce electromagnetic interference.

[0071] by Figure 10For example, when current is output from the beginning of the first secondary coil 420 and the beginning of the second secondary coil 430, the current at the beginning of the first secondary coil 420 flows through the first diode 610 to the first common magnetic circuit reactor module 100, and the current at the beginning of the second secondary coil 430 flows through the third diode 630 to the second common magnetic circuit reactor module 100. When current is output from the end of the first secondary coil 420 and the end of the second secondary coil 430, the current at the end of the first secondary coil 420 flows through the second diode 620 to the second common magnetic circuit reactor module 100, and the current at the beginning of the second secondary coil 430 flows through the fourth diode 640 to the first common magnetic circuit reactor module 100.

[0072] The welding power supply device of this utility model adopts the common magnetic circuit reactor module 100 disclosed in any of the above embodiments in the welding power supply module 700 to achieve synchronous demagnetization, with simple structure and stable output welding power.

[0073] Similarly, in some embodiments of this utility model, the first rectifier unit 510 and the second rectifier unit 520 are full-wave rectifier units or full-bridge rectifier units.

[0074] The welding machine according to the fourth aspect embodiment of this utility model, such as Figure 2 - Figure 16 As shown, it includes the welding power supply device disclosed in any of the above embodiments.

[0075] The welding machine of this utility model uses the welding power supply device disclosed in any of the above embodiments to achieve synchronous demagnetization, reduce electromagnetic interference, and stabilize the output welding power.

[0076] 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.

[0077] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A co-magnetic circuit reactance module, characterized by, The first inductor and the second inductor are coupled to each other, a first end of the first inductor is connected to a first end of the second inductor, a second end of the first inductor is connected to a second end of the second inductor, and the first end of the first inductor and the second end of the second inductor are homonymous ends.

2. A co-magnetic circuit reactance module according to claim 1, characterized in that, The first inductor and the second inductor are wound on the magnetic core.

3. A welding power supply device characterized by comprising: The welding power supply module comprises at least one transformer assembly, at least one rectifier module, and at least one common magnetic circuit reactance module, the transformer assembly comprises a primary coil and a first secondary coil coupled to each other, the rectifier module comprises at least a first diode and a second diode, a positive electrode of the first diode is connected to a first end of the first secondary coil, a positive electrode of the second diode is connected to a second end of the first secondary coil, and a negative electrode of the first diode and a negative electrode of the second diode are connected to each other. The first end of the first inductor is connected to the negative electrode of the first diode, and the second end of the first inductor is used for being connected to a welding gun. Alternatively, the negative electrode of the first diode is used for being connected to the welding gun, the first end of the first inductor is connected to a center tap of the first secondary coil, and the second end of the first inductor is used for being connected to a workpiece.

4. The welding power supply device of claim 3, wherein, The transformer assembly further comprises a second secondary coil coupled to the primary coil, a first end of the second secondary coil is a homonymous end of the first end of the first secondary coil, the positive electrode of the first diode is connected to the first end of the second secondary coil, and the positive electrode of the second diode is connected to a second end of the second secondary coil.

5. The welding power supply device of claim 3, wherein, The transformer assembly further comprises a second secondary coil coupled to the primary coil, a first end of the second secondary coil is a homonymous end of the first end of the first secondary coil, the rectifier module comprises a first rectification unit and a second rectification unit, the first diode and the second diode constitute at least part of the first rectification unit, the second rectification unit comprises a third diode and a fourth diode, there are two common magnetic circuit reactance modules, the negative electrode of the first diode and the negative electrode of the second diode are connected to each other and connected to a first end of the first inductor in the first common magnetic circuit reactance module, the positive electrode of the third diode is connected to the first end of the second secondary coil, the positive electrode of the fourth diode is connected to a second end of the second secondary coil, the negative electrode of the third diode and the negative electrode of the fourth diode are connected to each other and connected to the first end of the first inductor in the second common magnetic circuit reactance module, and the second end of the first inductor is used for being connected to the welding gun.

6. A welding power supply device as defined in claim 5, characterized in that The first rectification unit and the second rectification unit are full-wave rectification units or full-bridge rectification units.

7. The welding power supply device of claim 3, wherein, There are at least two welding power supply modules, the first end of the first inductor in each of the welding power supply modules is connected to the negative electrode of the first diode, and the second end of the first inductor in each of the welding power supply modules is connected to each other and used for being connected to the welding gun. Or, the negative poles of the first diodes in the plurality of welding power modules are connected to each other and used for connecting with the welding gun, the leading ends of the first inductors in each welding power module are connected with the center taps of the corresponding first secondary coils, and the trailing ends of the first inductors are connected to each other and used for connecting with the workpiece.

8. The welding power supply device of claim 3, wherein, Each first inductor and each second inductor in the plurality of common magnetic circuit reactance modules are wound on the same magnetic core member.

9. A welding power supply device characterized by comprising: The welding power supply device comprises at least one welding power module, each welding power module comprises a transformer module, a rectifier module and two common magnetic circuit reactance modules as claimed in any one of claims 1 to 2, the transformer module comprises at least a transformer assembly, the transformer assembly comprises a primary coil, a first secondary coil and a second secondary coil which are coupled to each other, the leading ends of the first secondary coil and the second secondary coil are the same name ends, the rectifier module comprises a first rectifier unit and a second rectifier unit, the first rectifier unit comprises at least a first diode and a second diode, the second rectifier unit comprises at least a third diode and a fourth diode, the positive pole of the first diode is connected with the leading end of the first secondary coil, the positive pole of the second diode is connected with the trailing end of the first secondary coil, the positive pole of the third diode is connected with the leading end of the second secondary coil, the positive pole of the fourth diode is connected with the trailing end of the second secondary coil, the negative pole of the first diode is connected with the negative pole of the third diode and the leading end of the first inductor in the first common magnetic circuit reactance module respectively, the negative pole of the second diode is connected with the negative pole of the fourth diode and the leading end of the first inductor in the second common magnetic circuit reactance module respectively, and the trailing ends of the first inductors in the two common magnetic circuit reactance modules are used for connecting with the welding gun.

10. A welding machine characterized by, The welding power supply device as claimed in any one of claims 3 to 9.

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