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

Abstract

The invention discloses a common magnetic circuit reactance module, a welding power supply device and a welding machine, the common magnetic circuit reactance module comprises 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] The invention relates to the technical field of welding machine equipment, and in particular to a common magnetic circuit reactance module, a welding power supply device and a welding machine. Background Art

[0002] The welding power conversion circuit of the welding machine generally includes an inverter module, a transformer module, a rectifier module and a reactor module. The AC power provided by the power supply network is rectified and filtered, and then converted 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 and filtered by the reactor module to power the welding arc.

[0003] Previously, the applicant has developed and improved the inductor structure in the reactance module, such as Figure 1 As shown, however, in actual use, it was found that the previously proposed structural improvement still has room for optimization. In the previously proposed structure, demagnetization is achieved by coupling two inductors, but in terms of working principle, current flows through the two inductors (inductor L1 and inductor L2) or (inductor L3 and inductor L4) asynchronously, and only asynchronous demagnetization can be achieved. Summary of the invention

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

[0005] According to a first aspect of an embodiment of the present invention, a common magnetic circuit reactance module comprises a first inductor and a second inductor coupled to each other, wherein a head end of the first inductor is connected to a head end of the second inductor, a tail end of the first inductor is connected to a tail end of the second inductor, and the head end of the first inductor and the tail end of the second inductor are the same-named ends.

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

[0007] Beneficial effects:

[0008] The common magnetic circuit reactance module of the present invention has a head end of a first inductor connected to a head end of a second inductor, and the head end of the first inductor can be used to access the output end of a rectifier module of a welding power supply device, or can be connected to a workpiece in a welding process of a welding machine, and the main current flows in from the head end of the first inductor and the head end of the second inductor at the same time, the first branch current passes through the first inductor, and the second branch current passes through the second inductor, and the first branch current and the second branch current finally merge into the main current from the tail end of the first inductor and the tail end of the second inductor. 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, thereby reducing the electromagnetic interference of the main current and providing welding power for the welding gun. Since the first branch current and the second branch current flow into the head end of the first inductor and the head end of the second inductor synchronously, and the head end of the first inductor and the tail end of the second inductor are the same-named ends, synchronous demagnetization can be achieved, and the structure is simple.

[0009] According to some embodiments of the present invention, the common magnetic circuit reactance module further includes a magnetic core, and the first inductor and the second inductor are both wound on the magnetic core.

[0010] According to the second aspect of the present invention, the welding power supply device comprises at least one welding power supply module, each of the welding power supply modules comprises a transformer module, a rectifier module and a common magnetic circuit reactance module disclosed in any of the above embodiments, the transformer module comprises at least a transformer assembly, 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, the positive pole of the first diode is connected to the head end of the first secondary coil, the positive pole of the second diode is connected to the tail end of the first secondary coil, and the negative pole of the first diode is connected to the negative pole of the second diode, wherein the head end of the first inductor is connected to the negative pole of the first diode, and the tail end of the first inductor is used to be connected to a welding gun; or, the negative pole of the first diode is used to be connected to a welding gun, the head end of the first inductor is connected to the center tap of the first secondary coil, and the tail end of the first inductor is used to be connected to a workpiece.

[0011] The welding power supply device according to the embodiment of the present invention has at least the following beneficial effects:

[0012] In the welding power supply device of the present invention, the welding power supply module adopts the common magnetic circuit reactance module disclosed in any of the above embodiments to achieve synchronous demagnetization, has a simple structure, and outputs stable welding power.

[0013] According to some embodiments of the present invention, the transformer assembly also 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 are the same end, the positive pole of the first diode is connected to the first end of the second secondary coil, and the positive pole of the second diode is connected to the tail end of the second secondary coil.

[0014] According to some embodiments of the present invention, the transformer assembly also 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 are the same end, 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 cathode of the first diode is connected to the cathode of the second diode and is connected to the first end of the first inductor in the first common magnetic circuit reactance module, the anode of the third diode is connected to the first end of the second secondary coil, the anode of the fourth diode is connected to the tail end of the second secondary coil, the cathode of the third diode is connected to the cathode of the fourth diode and is connected to the first end of the first inductor in the second common magnetic circuit reactance module, and the tail end of the first inductor is used to connect to a welding gun.

[0015] According to some embodiments of the present invention, the first rectifying unit and the second rectifying unit are full-wave rectifying units or full-bridge rectifying units.

[0016] According to some embodiments of the present invention, there are at least two welding power modules, wherein the head ends of the first inductors in multiple welding power modules are all connected to the cathode of the first diode, and the tail ends of the first inductors in multiple welding power modules are connected to each other and used to be connected to a welding gun; or, the cathodes of the first diodes in multiple welding power modules are connected to each other and used to be connected to a welding gun, the head end of the first inductor in each welding power module is connected to the center tap of the first secondary coil corresponding to each welding power module, and the tail ends of each first inductor are connected to each other and used to be connected to a workpiece.

[0017] According to some embodiments of the present invention, each first inductor and each second inductor in the plurality of common magnetic circuit reactance modules are wound on the same magnetic core.

[0018] According to a third aspect of the present invention, a welding power supply device includes at least one welding power supply module, each of which includes a transformer module, a rectifier module, and two common magnetic circuit reactance modules disclosed in any of the above embodiments, the transformer module includes at least a transformer assembly, the transformer assembly includes a mutually coupled primary coil, a first secondary coil, and a second secondary coil, the first end of the first secondary coil and the first end of the second secondary coil are the same end, 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 positive electrode of the first diode is connected to the head end of the first secondary coil, the positive electrode of the second diode is connected to the tail end of the first secondary coil, the positive electrode of the third diode is connected to the head end of the second secondary coil, the positive electrode of the fourth diode is connected to the tail end of the second secondary coil, the cathode of the first diode is respectively connected to the cathode of the third diode and the head end of the first inductor in the first common magnetic circuit reactance module, the cathode of the second diode is respectively connected to the cathode of the fourth diode and the head end of the first inductor in the second common magnetic circuit reactance module, and the tail ends of the first inductors in the two common magnetic circuit reactance modules are used to connect to the welding gun.

[0019] The welding power supply device according to the embodiment of the present invention has at least the following beneficial effects:

[0020] In the welding power supply device of the present invention, the welding power supply module adopts the common magnetic circuit reactance module disclosed in any of the above embodiments to achieve synchronous demagnetization, has a simple structure, and outputs stable welding power.

[0021] A welding machine according to an embodiment of the fourth aspect of the present invention comprises a welding power supply device disclosed in any of the above embodiments.

[0022] The welding machine according to the embodiment of the present invention has at least the following beneficial effects:

[0023] The welding machine of the present invention uses the welding power supply device disclosed in any of the above embodiments for power supply, realizes synchronous demagnetization, reduces electromagnetic interference, and outputs stable welding power.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 It is a schematic diagram of the circuit structure of a conventional welding power supply device;

[0027] Figure 2 A circuit diagram of an input rectifier module and an inverter module of one embodiment of a welding power supply device of the present invention;

[0028] Figure 3 A circuit diagram of a first embodiment of a welding power supply device according to the present invention;

[0029] Figure 4 A circuit diagram of a second embodiment of a welding power supply device according to the present invention;

[0030] Figure 5 It is a structural schematic diagram of one embodiment of the common magnetic circuit reactance module of the present invention;

[0031] Figure 6 It is a structural schematic diagram of another embodiment of the common magnetic circuit reactance module of the present invention;

[0032] Figure 7 A circuit diagram of a third embodiment of a welding power supply device according to the present invention;

[0033] Figure 8 A circuit diagram of a fourth embodiment of a welding power supply device according to the present invention;

[0034] Fig. 9 A circuit diagram of a fifth embodiment of a welding power supply device according to the present invention;

[0035] Fig.10 A circuit diagram of a sixth embodiment of a welding power supply device according to the present invention;

[0036] Fig.11 A circuit diagram of a seventh embodiment of a welding power supply device according to the present invention;

[0037] Fig.12 is a circuit diagram of an eighth embodiment of a welding power supply device of the present invention;

[0038] Fig.13 A circuit diagram of a ninth embodiment of a welding power supply device according to the present invention;

[0039] Fig.14 A circuit diagram of a tenth embodiment of a welding power supply device according to the present invention;

[0040] Fig.15 is a circuit diagram of an eleventh embodiment of a welding power supply device according to the present invention;

[0041] Fig.16 FIG. 1 is a circuit diagram of a twelfth embodiment of a welding power supply device according to the present invention.

[0042] Reference numerals:

[0043] Common magnetic circuit reactance 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 gun 810; workpiece 820; arc 830. DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0045] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] like Figure 2 - Fig.16As shown, a common magnetic circuit reactance module 100 according to an embodiment of the first aspect of the present invention includes a first inductor 110 and a second inductor 120 that are coupled to each other, the head end of the first inductor 110 is connected to the head end of the second inductor 120, the tail end of the first inductor 110 is connected to the tail end of the second inductor 120, and the head end of the first inductor 110 and the tail end of the second inductor 120 are the same-named ends.

[0049] The first inductor 110 and the second inductor 120 may both be wound by coils, wherein the head end of the first inductor 110 and the head end of the second inductor 120 are first connected and then arranged on the first connection terminal, the tail end of the first inductor 110 and the tail end of the second inductor 120 are first connected and then arranged on the second connection terminal, and the external circuit component may be directly connected to the first connection terminal to be respectively connected to the head end of the first inductor 110 and the head end of the second inductor 120, and similarly, the external circuit component may be directly connected to the second connection terminal to be respectively connected to the tail end of the first inductor 110 and the tail end of the second inductor 120. In some embodiments of the present invention, the head end of the first inductor 110 and the head end of the second inductor 120 may also be in an idle state, and the external circuit component may also be respectively connected to the head end of the first inductor 110 and the head end of the second inductor 120 through a wire, and the tail end of the first inductor 110 and the tail end of the second inductor 120 are similarly connected.

[0050] In the common magnetic circuit reactance module 100 of the present invention, the head end of the first inductor 110 is connected to the head end of the second inductor 120. The head end of the first inductor 110 can be used to connect to the output end of the rectifier module 500 of the welding power supply device, or can be connected to the workpiece 820 during the welding process of the welding machine. The main current flows into the head end of the first inductor 110 and the head end of the second inductor 120 at the same time. The first branch current passes through the first inductor 110, and the second branch current passes through the second inductor 120. The first branch current and the second branch current are finally connected from the first inductor 110. The tail end of the first inductor 110 and the tail end of the second inductor 120 merge into 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, thereby reducing the electromagnetic interference of the main current and providing welding power for the welding gun 810. Since the first branch current and the second branch current flow synchronously into the head end of the first inductor 110 and the head end of the second inductor 120, and the head end of the first inductor 110 and the tail end of the second inductor 120 are the same-named ends, synchronous demagnetization can be achieved, and the structure is simple.

[0051] In some embodiments of the present invention, the common magnetic circuit reactance module 100 also includes a magnetic core member 130, the first inductor 110 and the second inductor 120 are both wound on the magnetic core member 130, the magnetic core member 130 can be made of an iron core, the magnetic core member 130 can be in the shape of a rod, a ring, or a Japanese shape, etc., and 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 member 130.

[0052] like Figure 5 , 6 As shown, the different winding directions of the first inductor 110 and the second inductor 120 or the circuit wiring make the current input directions different, which can form different common magnetic circuit reactance module 100 structures, but ultimately in the circuit structure, the head end of the first inductor 110 and the tail end of the second inductor 120 need to be the same end, so that when the current flows from the head end of the first inductor 110 and the head 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, so that in the process of modulating the welding current for the welding machine, the opposite magnetic fluxes can cancel each other out.

[0053] According to a second aspect of the present invention, a welding power supply device is provided. Figure 2 , 3 , 4, 7, 8, 9, 12, 13, and 14, including at least one welding power module 700, each of which includes a transformer module 400, a rectifier module 500, and a common magnetic circuit reactance module 100 disclosed in any of the above embodiments, the transformer module 400 includes at least a transformer assembly, the transformer assembly includes a primary coil 410 and a first secondary coil 420 coupled to each other, the rectifier module 500 includes at least a first diode 610 and a second diode 620, the positive electrode of the first diode 610 is connected to the first end of the first secondary coil 420, and the positive electrode of the first diode 610 is connected to the first end of the first secondary coil 420. The positive electrode of the second diode 620 is connected to the tail end of the first secondary coil 420, and the negative electrode of the first diode 610 is connected to the negative electrode of the second diode 620, wherein the head end of the first inductor 110 is connected to the negative electrode of the first diode 610, and the tail end of the first inductor 110 is used to be connected to the welding gun 810; or, the negative electrode of the first diode 610 is used to be connected to the welding gun 810, the head 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 be connected to the workpiece 820.

[0054] Generally speaking, 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 a diode. The input end 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 switch tubes, which inverts the DC power output by the input rectifier module 200, outputs the AC power to the transformer assembly for transformation, and then outputs it to the rectifier module 500.

[0055] The first secondary coil 420 may be an integrated transformer coil with a center tap, or may be a two-section coil unit, where the two sections of the coil are connected and the connection point forms a center tap.

[0056] In some embodiments of the present invention, Figure 3 As shown, the head end of the first inductor 110 is connected to the negative electrode of the first diode 610, and the tail end of the first inductor 110 is used to connect to the welding gun 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 gun 810 to form an arc 830 on the workpiece 820 to complete the welding.

[0057] In some embodiments of the present invention, Figure 4 As shown, the cathode of the first diode 610 is used to connect to the welding gun 810, the head 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 gun 810 discharges to the workpiece 820 to form an arc 830. A loop is formed between the transformer module 400, the rectifier module 500, the welding gun 810, the workpiece 820, the common magnetic circuit reactance module 100 and the center tap. The welding current flows through the loop, and the common magnetic circuit reactance module 100 can also filter out the pulsation of the welding current and reduce electromagnetic interference.

[0058] In the welding power supply device of the present invention, the welding power supply module 700 adopts the common magnetic circuit reactance module 100 disclosed in any of the above embodiments to achieve synchronous demagnetization, has a simple structure, and outputs stable welding power.

[0059] In some embodiments of the present invention, Figure 7 As shown, there can be multiple first diodes 610, such as two, three, etc., and multiple first diodes 610 are connected in parallel. Similarly, there can be multiple second diodes 620, such as two, three, etc., and multiple second diodes 620 are connected in parallel.

[0060] In some embodiments of the present invention, 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 end, the positive pole of the first diode 610 is connected to the first end of the second secondary coil 430, and the positive pole of the second diode 620 is connected to the tail end of the second secondary coil 430.

[0061] The primary coil 410 is connected to an AC power supply, and the current output from the head end of the first secondary coil 420 and the head end of the second secondary coil 430 can pass through the first diode 610 and then enter the common magnetic circuit reactance module 100 for filtering. Similarly, the current output from the tail end of the first secondary coil 420 and the tail end of the second secondary coil 430 can pass through the first diode 610 and then enter the common magnetic circuit reactance module 100 for filtering.

[0062] In some embodiments of the present invention, Fig. 9 As 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 end, 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, the negative end of the first diode 610 The anode of the third diode 630 is connected to the cathode of the second diode 620 and is connected to the beginning of the first inductor 110 in the first common magnetic circuit reactance 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 tail end of the second secondary coil 430, the cathode of the third diode 630 is connected to the cathode of the fourth diode 640 and is connected to the beginning of the first inductor 110 in the second common magnetic circuit reactance module 100, and the tail end of the first inductor 110 is used to be connected to the welding gun 810.

[0063] Two common magnetic circuit reactance modules 100 can be used to correspond to the first secondary coil 420 and the second secondary coil 430 one by one. When the current is output from the first end of the first secondary coil 420 and the first end of the second secondary coil 430, the current output from the first end of the first secondary coil 420 flows into the first common magnetic circuit reactance module 100, and the current output from the first end of the second secondary coil 430 flows into the second common magnetic circuit reactance module 100.

[0064] In some embodiments of the present invention, the first rectifying unit 510 and the second rectifying unit 520 are full-wave rectifying units or full-bridge rectifying units.

[0065] like Figure 3 , 4 As shown in FIGS. 7 , 8 and 9 , the first rectifying unit 510 and the second rectifying unit 520 are full-wave rectifying units.

[0066] And in Fig.12 , 13 , 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 anode of the fifth diode 650 and the anode of the sixth diode 660 are connected and are used to connect to the workpiece 820 or to connect to the center tap of the first secondary coil 420, the cathode of the fifth diode 650 is respectively connected to the head end of the first secondary coil 420 and the anode of the first diode 610, and the cathode of the sixth diode 660 is respectively connected to the tail end of the first secondary coil 420 and the anode of the second diode 620.

[0067] The second rectifier unit 520 also includes a seventh diode 670 and an eighth diode 680, the anode of the seventh diode 670 and the anode of the eighth diode 680 are connected and used to connect to the workpiece 820 or to connect to the center tap of the second secondary coil 430, the cathode of the seventh diode 670 is respectively connected to the head end of the second secondary coil 430 and the anode of the third diode 630, and the cathode of the eighth diode 680 is respectively connected to the tail end of the second secondary coil 430 and the anode of the fourth diode 640.

[0068] In some embodiments of the present invention, Figure 2 , 3 As shown in , 4, 7, 8, 9, 12, 13, and 14, there are at least two welding power modules 700, wherein the head ends of the first inductors 110 in multiple welding power modules 700 are all connected to the cathode of the first diode 610, and the tail ends of the first inductors 110 in multiple welding power modules 700 are connected to each other and used to be connected to the welding gun 810; or, the cathodes of the first diodes 610 in multiple welding power modules 700 are connected to each other and used to be connected to the welding gun 810, the head ends of the first inductors 110 in each welding power module 700 are connected to the center tap of the first secondary coil 420 respectively corresponding to each other, and the tail ends of each first inductor 110 are connected to each other and used to be connected to the workpiece 820.

[0069] In some embodiments of the present invention, Figure 5 , 6 As shown, each first inductor 110 and each second inductor 120 in the plurality of common magnetic circuit reactance modules 100 are wound on the same magnetic core 130, thereby saving the volume of the plurality of common magnetic circuit reactance modules 100, making the structure compact and reducing the occupied space.

[0070] According to a third aspect of the present invention, a welding power supply device is provided. Fig.10 , 11 , 15, and 16, comprising at least one welding power supply module 700, each of the welding power supply modules 700 comprising a transformer module 400, a rectifier module 500, and two common magnetic circuit reactance modules 100 disclosed in any of the above embodiments, the transformer module 400 at least comprising a transformer assembly, the transformer assembly comprising a mutually coupled primary coil 410, a first secondary coil 420, and a second secondary coil 430, the first secondary coil 420 and the second secondary coil 430 having the same name, the rectifier module 500 comprising a first rectifier unit 510 and a second rectifier unit 520, the first rectifier unit 510 comprising at least a first diode 610 and a second diode 620, the second rectifier unit 520 comprising at least a third diode 630 and a fourth diode 640, the first The positive pole of a diode 610 is connected to the head end of the first secondary coil 420, the positive pole of the second diode 620 is connected to the tail end of the first secondary coil 420, the positive pole of the third diode 630 is connected to the head end of the second secondary coil 430, the positive pole of the fourth diode 640 is connected to the tail end of the second secondary coil 430, the cathode of the first diode 610 is respectively connected to the cathode of the third diode 630 and the head end of the first inductor 110 in the first common magnetic circuit reactance module 100, the cathode of the second diode 620 is respectively connected to the cathode of the fourth diode 640 and the head end of the first inductor 110 in the second common magnetic circuit reactance module 100, and the tail ends of the first inductors 110 in the two common magnetic circuit reactance modules 100 are both used to connect to the welding gun 810.

[0071] The same common magnetic circuit reactance module 100 can be connected to the first rectifier unit 510 and the second rectifier unit 520 respectively, and can also filter out the pulsation of the welding current and reduce electromagnetic interference.

[0072] by Fig.10 For example, when current is output from the head end of the first secondary coil 420 and the head end of the second secondary coil 430, the current at the head end of the first secondary coil 420 flows to the first common magnetic circuit reactance module 100 through the first diode 610, and the current at the head end of the second secondary coil 430 flows to the second common magnetic circuit reactance module 100 through the third diode 630, and when current is output from the tail end of the first secondary coil 420 and the tail end of the second secondary coil 430, the current at the tail end of the first secondary coil 420 flows to the second common magnetic circuit reactance module 100 through the second diode 620, and the current at the head end of the second secondary coil 430 flows to the first common magnetic circuit reactance module 100 through the fourth diode 640.

[0073] In the welding power supply device of the present invention, the welding power supply module 700 adopts the common magnetic circuit reactance module 100 disclosed in any of the above embodiments to achieve synchronous demagnetization, has a simple structure, and outputs stable welding power.

[0074] Likewise, in some embodiments of the present invention, the first rectifying unit 510 and the second rectifying unit 520 are full-wave rectifying units or full-bridge rectifying units.

[0075] A welding machine according to a fourth aspect of the present invention, Figure 2 - Fig.16 As shown, it includes the welding power supply device disclosed in any of the above embodiments.

[0076] The welding machine of the present invention uses the welding power supply device disclosed in any of the above embodiments for power supply, realizes synchronous demagnetization, reduces electromagnetic interference, and outputs stable welding power.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0078] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A common magnetic circuit reactance module, characterized in that: It includes a first inductor and a second inductor coupled to each other, wherein the head end of the first inductor is connected to the head end of the second inductor, the tail end of the first inductor is connected to the tail end of the second inductor, and the head end of the first inductor and the tail end of the second inductor are mutually connected.

2. The common magnetic circuit reactance module according to claim 1, characterized in that: It also includes a magnetic core, on which the first inductor and the second inductor are both wound.

3. A welding power supply device, characterized in that: The welding power supply module comprises at least one welding power supply module, each of which comprises a transformer module, a rectifier module, and the common magnetic circuit reactance module according to any one of claims 1 to 2, wherein the transformer module comprises at least a transformer assembly, 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, the anode of the first diode being connected to the head end of the first secondary coil, the anode of the second diode being connected to the tail end of the first secondary coil, and the cathode of the first diode being connected to the cathode of the second diode; The first end of the first inductor is connected to the cathode of the first diode, and the tail end of the first inductor is used to be connected to the welding gun; Alternatively, the cathode of the first diode is connected to the welding gun, the head end of the first inductor is connected to the center tap of the first secondary coil, and the tail end of the first inductor is connected to the workpiece.

4. A welding power supply device according to claim 3, characterized in that: The transformer assembly also 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 are the same end, the positive pole of the first diode is connected to the first end of the second secondary coil, and the positive pole of the second diode is connected to the tail end of the second secondary coil.

5. A welding power supply device according to claim 3, characterized in that: The transformer assembly also 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 are the same-name ends, 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 cathode of the first diode is connected to the cathode of the second diode and is connected to the first end of the first inductor in the first common magnetic circuit reactance module, the anode of the third diode is connected to the first end of the second secondary coil, the anode of the fourth diode is connected to the tail end of the second secondary coil, the cathode of the third diode is connected to the cathode of the fourth diode and is connected to the first end of the first inductor in the second common magnetic circuit reactance module, and the tail end of the first inductor is used to connect to the welding gun.

6. A welding power supply device according to claim 5, characterized in that: The first rectifier unit and the second rectifier unit are full-wave rectifier units or full-bridge rectifier units.

7. A welding power supply device according to claim 3, characterized in that: There are at least two welding power modules, wherein the first ends of the first inductors in the plurality of welding power modules are all connected to the cathode of the first diode, and the tail ends of the first inductors in the plurality of welding power modules are connected to each other and used to be connected to the welding gun; Alternatively, the cathodes of the first diodes in multiple welding power modules are connected to each other and used to connect to a welding gun, the head end of the first inductor in each welding power module is connected to the center tap of the corresponding first secondary coil, and the tail ends of each first inductor are connected to each other and used to connect to a workpiece.

8. A welding power supply device according to claim 3, characterized in that: Each first inductor and each second inductor in the plurality of common magnetic circuit reactance modules are wound on the same magnetic core.

9. A welding power supply device, characterized in that: The welding power supply module comprises at least one welding power supply module, each of which comprises a transformer module, a rectifier module, and two common magnetic circuit reactance modules according to any one of claims 1 to 2, wherein the transformer module comprises at least a transformer assembly, the transformer assembly comprises a mutually coupled primary coil, a first secondary coil, and a second secondary coil, the first end of the first secondary coil and the first end of the second secondary coil are mutually identical 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 first diode The positive pole of the second diode is connected to the head end of the first secondary coil, the positive pole of the second diode is connected to the tail end of the first secondary coil, the positive pole of the third diode is connected to the head end of the second secondary coil, the positive pole of the fourth diode is connected to the tail end of the second secondary coil, the negative pole of the first diode is respectively connected to the negative pole of the third diode and the head end of the first inductor in the first common magnetic circuit reactance module, the negative pole of the second diode is respectively connected to the negative pole of the fourth diode and the head end of the first inductor in the second common magnetic circuit reactance module, and the tail ends of the first inductors in the two common magnetic circuit reactance modules are used to connect to the welding gun.

10. A welding machine, characterized in that: The welding power supply device comprises the welding power supply device according to any one of claims 3 to 9.

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