Distributed output rectification filtering modularized power conversion device and welding machine

Abstract

The utility model discloses a distribution type output rectification filtering modularization power conversion device and a welding machine, the distribution type output rectification filtering modularization power conversion device comprises a plurality of power supply modules, the power supply output ends of the plurality of power supply modules are connected to be used for supplying power to a load, and each power supply module comprises an inversion unit, a transformer unit, a first rectification unit and at least one reactance assembly. The output end of the inversion unit is connected with the input end of the transformer unit, the output end of the transformer unit is connected with the input end of the first rectification unit, the first rectification unit at least comprises a first diode and a second diode, the reactance assembly comprises a first inductor and a second inductor, and the output end of the first diode is connected with the first end of the first inductor. The output end of the second diode is connected with the first end of the second inductor, the second end of the first inductor is connected with the second end of the second inductor to form a power output end, the parameter specifications of selected elements are reduced, the manufacturing cost is reduced, the size and the weight are reduced, and the flexibility of the modulation output range is high.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply for welding equipment, in particular to a distributed output rectification and filtering modular power conversion device and a welding machine. Background Art

[0002] The existing power supply device for powering the welding machine usually includes an inverter module 910, a transformer module, a rectifier module 930 and a filter inductor 940. The inverter module 910 converts the power supply, and after the voltage transformation processing by the transformer module and the rectification processing by the rectifier module 930, it is output to the filter inductor 940. The energy is stored and discharged in the filter inductor 940, which can filter the pulsation in the current and reduce electromagnetic interference, and then provide welding power for the welding gun of the welding machine.

[0003] Specific as Figure 1 As shown, however, with this circuit topology, the semiconductor switch tube constituting the inverter module 910, the transformer winding constituting the transformer module, the fast recovery diode constituting the rectifier module 930, the filter inductor 940, etc., all need to adopt larger specification parameters in order to have a wider modulation range of power supply parameters such as voltage and current. However, the manufacturing cost is relatively high, and the adjustable flexibility is low. The device is large in size and weight, and occupies more installation space. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a distributed output rectifier filter modular power conversion device and a welding machine, which reduces the parameter specifications of the selected components, reduces the manufacturing cost, reduces the volume and weight, has high flexibility in the modulation output range, and improves the circuit dynamic characteristics.

[0005] According to the first aspect of the utility model, a distributed output rectification and filtering modular power conversion device includes multiple power supply modules, and the power output ends of the multiple power supply modules are connected to supply power to a load; the power supply module includes an inverter unit, a transformer unit, a first rectifier unit and at least one reactance component, the input end of the inverter unit is used to connect to a power supply, the output end of the inverter unit is connected to the input end of the transformer unit, the output end of the transformer unit is connected to the input end of the first rectifier unit, the first rectifier unit includes at least a first diode and a second diode, the reactance component includes a first inductor and a second inductor, the output end of the first diode is connected to the first end of the first inductor, the output end of the second diode is connected to the first end of the second inductor, and the second end of the first inductor is connected to the second end of the second inductor to form a power output end.

[0006] A distributed output rectification and filtering modular power conversion device according to an embodiment of the utility model has at least the following beneficial effects:

[0007] The utility model discloses a distributed output rectification and filtering modular power conversion device, in which the power output ends of a plurality of power supply modules are connected for parallel output, and are all used to supply power to a load after being connected in parallel, thereby the parameter specifications of the components selected in each power supply module can be reduced, the power output range of each power supply module can be adjusted, and the flexibility of the output range is improved, the input end of the first rectifier unit is used to access alternating current, part of the current can pass through the first diode and be output from the output end of the first diode to the first inductor, and part of the current can pass through the second diode and be output from the output end of the second diode to the second inductor, the first inductor and the second inductor can both store energy and discharge, thereby filtering out the pulsation of the passing current and reducing electromagnetic interference, and then the current is output from the power output end for use by the load, compared with the situation in which the output end of the first diode in the traditional power supply circuit is first connected to the output end of the second diode and then connected to the filter inductor, the inductance capacity parameter requirements of the first inductor and the second inductor are correspondingly reduced, the volume and weight of the reactor are greatly reduced, copper and iron materials are saved, costs are reduced, the space occupied by components is reduced, installation space is saved, and circuit dynamic characteristics are improved.

[0008] According to some embodiments of the present invention, the first inductor and the second inductor are coupled to each other, wherein current can flow from the first end of the first inductor to the second end of the first inductor and from the first end of the second inductor to the second end of the second inductor, and the magnetic flux generated by the current flowing through the first inductor and the magnetic flux generated by the current flowing through the second inductor can offset each other.

[0009] According to some embodiments of the present invention, the power output ends of the plurality of power supply modules can be detachably connected to each other, and each of the power supply modules can start or stop power output.

[0010] According to some embodiments of the utility model, the distributed output rectification and filtering modular power conversion device also includes a control module, and the control module is respectively connected to the inverter units in different power supply modules to make the power outputs of different power supply modules different.

[0011] According to some embodiments of the present invention, the first rectifying unit includes at least a first rectifying component, and the first diode and the second diode constitute at least a part of the first rectifying component.

[0012] According to some embodiments of the present invention, the first rectifier unit also includes a second rectifier component, there are two reactance components, the first diode and the second diode are correspondingly connected to the first inductor and the second inductor in one of the reactance components, the second rectifier component includes at least a third diode and a fourth diode, the output end of the third diode is connected to the first end of the first inductor in the other reactance component, the output end of the fourth diode is connected to the second end of the second inductor in the other reactance component, the second end of the first inductor in one of the reactance components is respectively connected to the second end of the second inductor in one of the reactance components, the second end of the first inductor in the other reactance component and the second end of the second inductor in the other reactance component to form the power supply output end.

[0013] According to some embodiments of the present invention, the first rectifying unit includes a first rectifying component and a second rectifying component, the first diode constitutes at least a part of the first rectifying component, and the second diode constitutes at least a part of the second rectifying component.

[0014] According to some embodiments of the present utility model, the transformer unit includes a primary coil, a first secondary coil and a second secondary coil coupled to each other, the first end of the primary coil, the first end of the first secondary coil and the first end of the second secondary coil are mutually connected ends, the first rectifier component also includes at least a third diode, the second rectifier component also includes at least a fourth diode, there are two reactance components, the first end of the first secondary coil is connected to the input end of the first diode, the second end of the first secondary coil is connected to the input end of the third diode, the first end of the second secondary coil is connected to the input end of the second diode, and the second end of the second secondary coil is connected to the fourth diode. The input end is connected, the output end of the first diode is connected to the first end of the first inductor in one of the reactance components, the output end of the third diode is connected to the first end of the second inductor in one of the reactance components, the output end of the second diode is connected to the first end of the second inductor in another of the reactance components, the output end of the fourth diode is connected to the first end of the first inductor in another of the reactance components, and the second end of the first inductor in one of the reactance components is respectively connected to the second end of the second inductor in one of the reactance components, the second end of the first inductor in another of the reactance components and the second end of the second inductor in another of the reactance components to form the power supply output end.

[0015] According to some embodiments of the present utility model, the transformer unit includes a primary coil, a first secondary coil and a second secondary coil coupled to each other, the first end of the primary coil, the first end of the first secondary coil and the first end of the second secondary coil are mutually connected ends, the first rectifier component also includes at least a third diode, the second rectifier component also includes at least a fourth diode, there are two reactance components, the first end of the first secondary coil is connected to the input end of the first diode, the second end of the first secondary coil is connected to the input end of the third diode, the first end of the second secondary coil is connected to the input end of the second diode, and the second end of the second secondary coil is connected to the fourth diode. The input end is connected, the output end of the first diode is connected to the first end of the first inductor in one of the reactance components, the output end of the second diode is connected to the first end of the second inductor in one of the reactance components, the output end of the third diode is connected to the first end of the first inductor in another of the reactance components, the output end of the fourth diode is connected to the first end of the second inductor in another of the reactance components, and the second end of the first inductor in one of the reactance components is respectively connected to the second end of the second inductor in one of the reactance components, the second end of the first inductor in another of the reactance components, and the second end of the second inductor in another of the reactance components to form the power supply output end.

[0016] The welding machine according to the second aspect of the present invention comprises a distributed output rectification and filtering modular power conversion device disclosed in any of the above embodiments, and the power output end is connected to the welding gun of the welding machine to provide welding power for the welding gun.

[0017] The welding machine according to the embodiment of the utility model has at least the following beneficial effects:

[0018] The utility model welding machine applies a distributed output rectification and filtering modular power conversion device disclosed in any of the above embodiments, which reduces the parameter specifications of the selected components, reduces the manufacturing cost, reduces the volume and weight, has high flexibility in the modulation output range, and improves the dynamic characteristics of the circuit.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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:

[0021] Figure 1 It is a circuit diagram of a conventional power supply device;

[0022] Figure 2 A circuit diagram of a second rectifier unit, an inverter unit, and a transformer unit of one embodiment of the power conversion device of the utility model;

[0023] Figure 3 This is a circuit diagram of the first embodiment of the power conversion device of the utility model;

[0024] Figure 4 This is a circuit diagram of a second embodiment of the power conversion device of the utility model;

[0025] Figure 5 This is a circuit diagram of a third embodiment of the power conversion device of the utility model;

[0026] Figure 6 This is a circuit diagram of a fourth embodiment of the power conversion device of the utility model;

[0027] Figure 7 This is a circuit diagram of a fifth embodiment of the power conversion device of the utility model;

[0028] Figure 8 This is a circuit diagram of a sixth embodiment of the power conversion device of the utility model;

[0029] Fig. 9 This is a circuit diagram of a seventh embodiment of the power conversion device of the utility model;

[0030] Fig.10 This is a circuit diagram of an eighth embodiment of the power conversion device of the utility model;

[0031] Fig.11 This is a circuit diagram of a ninth embodiment of the power conversion device of the utility model;

[0032] Fig.12 This is a circuit diagram of the tenth embodiment of the power conversion device of the utility model;

[0033] Fig.13 This is a circuit diagram of the eleventh embodiment of the power conversion device of the utility model.

[0034] Reference numerals:

[0035] < Prior Art >

[0036] Inverter module 910 ; transformer module 920 ; rectifier module 930 ; filter inductor 940 .

[0037] <The utility model>

[0038] Power supply module 100; second rectifier unit 200; inverter unit 300; transformer unit 400; primary coil 410; first secondary coil 420; second secondary coil 430; first rectifier component 510; second rectifier component 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; first reactance component 710; second reactance component 720; first inductor 730; second inductor 740; load 800. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments 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.

[0040] 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 "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside", etc., 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 cannot be understood as a limitation on the present invention.

[0041] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include 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.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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.

[0043] like Figure 2-Figure 13As shown, according to an embodiment of the first aspect of the utility model, a distributed output rectification and filtering modular power conversion device includes a plurality of power supply modules 100, and the power output ends of the plurality of power supply modules 100 are connected to supply power to a load 800. The power supply module 100 includes an inverter unit 300, a transformer unit 400, a first rectifier unit and at least one reactance component. The input end of the inverter unit 300 is used to be connected to a power supply, the output end of the inverter unit 300 is connected to the input end of the transformer unit 400, and the output end of the transformer unit 400 is connected to the input end of the first rectifier unit. The first rectifier unit includes at least a first diode 610 and a second diode 620. The reactance component includes a first inductor 730 and a second inductor 740. The output end of the first diode 610 is connected to the first end of the first inductor 730, the output end of the second diode 620 is connected to the first end of the second inductor 740, and the second end of the first inductor 730 is connected to the second end of the second inductor 740 to form a power output end.

[0044] In some embodiments of the present invention, Figure 2 As shown, the power supply module 100 may further include a second rectifier unit 200 , the input end of the second rectifier unit 200 is used to be connected to the power supply, and the output end of the second rectifier unit 200 is connected to the input end of the inverter unit 300 .

[0045] Among them, the second rectifier unit 200 can be a full-bridge rectifier circuit or a full-wave rectifier circuit composed of multiple diodes, the power supply can be an AC power supply, the second rectifier unit 200 rectifies the AC power supply into DC power, the inverter unit 300 is composed of multiple semiconductor switching tubes, and the distributed output rectification and filtering modular power conversion device also includes a control module. The control module can be connected to the semiconductor switching tube in the inverter unit 300. The control module controls the on and off of the switching tube to perform power conversion and regulation. The transformer unit 400 performs voltage conversion, and then after rectification by the first rectifier unit and filtering by the reactance component, it supplies power to the load 800.

[0046] In the distributed output rectification and filtering modular power conversion device of the utility model, the power output ends of the multiple power supply modules 100 are connected to output in parallel, and are used to power the load 800 after being connected in parallel. Therefore, the parameter specifications of the components selected in each power supply module 100 can be reduced, and the power output range of each power supply module 100 can be adjusted, thereby improving the flexibility of the output range. The input end of the first rectifier unit is used to access the alternating current, and part of the current can pass through the first diode 610 and be output from the output end of the first diode 610 to the first inductor 730, and part of the current can pass through the second diode 620 and be output from the second diode 6 The output end of the first inductor 730 and the second inductor 740 are both capable of storing and discharging energy, thereby filtering out the pulsation of the passing current and reducing electromagnetic interference. The current is then output from the output end of the power supply for use by the load 800. Compared with the situation in which the output end of the first diode 610 in the traditional power supply circuit is first connected to the output end of the second diode 620 and then connected to the filter inductor, the inductance capacity parameter requirements of the first inductor 730 and the second inductor 740 are correspondingly reduced, which greatly reduces the volume and weight of the reactor, saves copper and iron materials, reduces costs, reduces the space occupied by components, saves installation space, and improves the dynamic characteristics of the circuit.

[0047] In some embodiments of the present invention, Figure 3-Figure 13 As shown, the first inductor 730 and the second inductor 740 are coupled to each other, wherein current can flow from the first end of the first inductor 730 to the second end of the first inductor 730 and from the first end of the second inductor 740 to the second end of the second inductor 740, and the magnetic flux generated by the current flowing through the first inductor 730 and the magnetic flux generated by the current flowing through the second inductor 740 can offset each other.

[0048] Since the first inductor 730 and the second inductor 740 are coupled to each other, the magnetic flux generated by the current flowing through the first inductor 730 and the magnetic flux generated by the current flowing through the second inductor 740 cancel each other out, ensuring that the first inductor 730 and the second inductor 740 maintain good performance. In addition, by cooperating with multiple inductor elements to process the current, the inductance capacitance parameter requirements of the inductor elements can also be reduced accordingly.

[0049] Specifically, the reactance component further includes a magnetic core, and the first inductor 730 and the second inductor 740 are both wound on the magnetic core.

[0050] Among them, the magnetic core piece can be made of an iron core, and the magnetic core piece can be in a rod shape or a ring shape. The first inductor 730 and the second inductor 740 are both wound on the magnetic core piece. The different winding directions or the circuit wiring make the current input directions different, which can make the magnetic fluxes generated by the first inductor 730 and the second inductor 740 opposite to each other in the magnetic core piece, so that during the rectification and filtering process, the opposite magnetic fluxes can cancel each other out.

[0051] In some embodiments of the present invention, the reactance component may also be formed by a wire led from the cathode of the first diode 610 passing through one or more magnetic rings to form a first inductor 730 and a wire led from the cathode of the second diode 620 passing through one or more magnetic rings to form a second inductor 740.

[0052] It should be noted that a full-wave rectifier circuit or a full-bridge rectifier circuit can be selected in the first rectifier unit, and it can be understood that, regardless of whether it is a full-wave rectifier circuit or a full-bridge rectifier circuit, the first diode 610 and the second diode 620 are two diodes close to the output end of the first rectifier unit, the cathode of the first diode 610 is connected to the first end of the first inductor 730, the cathode of the second diode 620 is connected to the first end of the second inductor 740, and then, the second end of the first inductor 730 is connected to the second end of the second inductor 740, and the cathode of the first diode 610 and the cathode of the second diode 620 are not directly connected.

[0053] In some embodiments of the present invention, the power output ends of the plurality of power supply modules 100 can be detachably connected to each other, and each of the power supply modules 100 can start or stop power output.

[0054] The number of power supply modules 100 of the present design can be freely selected, and the parallel connection of multiple power supply modules 100 can increase the output power and output voltage. Specifically, the power output end can be a plug-in terminal, and multiple plug-in terminals can be connected in parallel in a parallel connector and then output to the load 800.

[0055] In some embodiments of the present invention, the control module is respectively connected to the inverter units 300 in different power supply modules 100, so that the power outputs of the different power supply modules 100 are different.

[0056] The control module can control each power supply module 100 to output individually, for example, when one power supply module 100 outputs at full load, the other power supply module 100 adjusts the output, thereby achieving more accurate adjustment in a smaller range and more flexible and reliable output.

[0057] In some embodiments of the present invention, the first rectifying unit at least includes a first rectifying component 510 , and the first diode 610 and the second diode 620 constitute at least a part of the first rectifying component 510 .

[0058] Among them, Figure 3 , 4 , 5, the power supply module 100 has two, the first rectifier component 510 is a full-wave rectifier circuit, such as Figure 3 As shown, the transformer unit 400 includes a primary coil 410 and a first secondary coil 420 coupled to each other, the first secondary coil 420 is provided with a grounded center tap between the first and second ends thereof, 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 second end of the first secondary coil 420, the negative electrode of the first diode 610 is connected to the first end of the first inductor 730, the negative electrode of the second diode 620 is connected to the first end of the second inductor 740, the second end of the first inductor 730 is connected to the second end of the second inductor 740 to form a power output end, and the power output end is further connected to the load 800.

[0059] like Figure 4 As shown, based on Figure 3 In an embodiment, there may be multiple first diodes 610 and multiple second diodes 620, and the multiple first diodes 610 are connected in parallel, the positive poles of the first diodes 610 are connected to the first end of the first secondary coil 420, the negative poles of the first diodes 610 are connected to the first end of the first inductor 730, the positive poles of the second diodes 620 are connected to the second end of the first secondary coil 420, and the negative poles of the second diodes 620 are connected to the first end of the second inductor 740.

[0060] like Figure 5 As shown, the transformer unit 400 includes a primary coil 410, a first secondary coil 420 and a second secondary coil 430 that are coupled to each other, the positive electrode of the first diode 610 is respectively connected to the first end of the first secondary coil 420 and the first end of the second secondary coil 430, the positive electrode of the second diode 620 is respectively connected to the second end of the first secondary coil 420 and the second end of the second secondary coil 430, the negative electrode of the first diode 610 is connected to the first end of the first inductor 730, the negative electrode of the second diode 620 is connected to the first end of the second inductor 740, the second end of the first inductor 730 is connected to the second end of the second inductor 740 to form a power output end, and the power output end is then connected to the load 800.

[0061] And in Fig. 9 , 10 In the embodiment, the first rectifier component 510 is a full-bridge rectifier circuit. Fig. 9As shown, the transformer unit 400 includes a primary coil 410 and a first secondary coil 420 coupled to each other, the first rectifier component 510 also includes a third diode 630 and a fourth diode 640, the first end of the first secondary coil 420 is respectively connected to the positive electrode of the first diode 610 and the negative electrode of the third diode 630, the second end of the first secondary coil 420 is respectively connected to the positive electrode of the second diode 620 and the negative electrode of the fourth diode 640, the positive electrode of the third diode 630 and the positive electrode of the fourth diode 640 are both grounded, the negative electrode of the first diode 610 is connected to the first end of the first inductor 730, the negative electrode of the second diode 620 is connected to the first end of the second inductor 740, the second end of the first inductor 730 is connected to the second end of the second inductor 740 to form a power output end, and the power output end is then connected to the load 800.

[0062] like Fig.10 As shown, the transformer unit 400 includes a primary coil 410, a first secondary coil 420 and a second secondary coil 430 coupled to each other, the first rectifier component 510 also includes a third diode 630 and a fourth diode 640, the first end of the first secondary coil 420 is respectively connected to the first end of the second secondary coil 430, the positive electrode of the first diode 610 and the negative electrode of the third diode 630, the second end of the first secondary coil 420 is respectively connected to the second end of the second secondary coil 430, the positive electrode of the second diode 620 and the negative electrode of the fourth diode 640, the positive electrode of the third diode 630 and the positive electrode of the fourth diode 640 are both grounded, the negative electrode of the first diode 610 is connected to the first end of the first inductor 730, the negative electrode of the second diode 620 is connected to the first end of the second inductor 740, the second end of the first inductor 730 is connected to the second end of the second inductor 740 to form a power output end, and the power output end is then connected to the load 800.

[0063] According to some embodiments of the present invention, Figure 6 , 7As shown in , 8, 11, 12, and 13, the first rectifier unit also includes a second rectifier component 520, and there are two reactance components. Similarly, the power supply module 100 has two. The first diode 610 and the second diode 620 are correspondingly connected to the first inductor 730 and the second inductor 740 in one of the reactance components. The second rectifier component 520 includes at least a third diode 630 and a fourth diode 640. The output end of the third diode 630 is connected to the first end of the first inductor 730 in another reactance component, and the output end of the fourth diode 640 is connected to the second end of the second inductor 740 in another reactance component. The second end of the first inductor 730 in one of the reactance components is respectively connected to the second end of the second inductor 740 in one of the reactance components, the second end of the first inductor 730 in another reactance component, and the second end of the second inductor 740 in another reactance component to form the power output end.

[0064] Specifically, there are two reactance components, namely a first reactance component 710 and a second reactance component 720. Figure 6 As shown, the first rectifier component 510 and the second rectifier component 520 are both full-wave rectifier circuits, the transformer unit 400 includes a primary coil 410, a first secondary coil 420 and a second secondary coil 430 that are coupled to each other, the anode of the first diode 610 is connected to the first end of the first secondary coil 420, the anode of the second diode 620 is connected to the second end of the first secondary coil 420, the cathode of the first diode 610 is connected to the first end of the first inductor 730 of the first reactance component 710, the cathode of the second diode 620 is connected to the first end of the second inductor 740 of the first reactance component 710, the anode of the third diode 630 is connected to the second secondary coil 430, and the cathode of the third diode 630 is connected to the first end of the second inductor 740 of the first reactance component 710. 0, the anode of the fourth diode 640 is connected to the second end of the second secondary coil 430, the cathode of the third diode 630 is connected to the first end of the first inductor 730 of the second reactance component 720, the cathode of the fourth diode 640 is connected to the first end of the second inductor 740 of the second reactance component 720, the second end of the first inductor 730 of the first reactance component 710 is respectively connected to the second end of the second inductor 740 of the first reactance component 710, the second end of the first inductor 730 of the second reactance component 720 and the second end of the second inductor 740 of the second reactance component 720 to form a power output end, and the power output end is then connected to the load 800.

[0065] In some embodiments of the present invention, Fig.11As shown, the first rectifier component 510 and the second rectifier component 520 are both full-bridge rectifier circuits, the first rectifier component 510 further includes a fifth diode 650 and a sixth diode 660, the second rectifier component 520 further includes a seventh diode 670 and an eighth diode 680, the transformer unit 400 includes a primary coil 410, a first secondary coil 420 and a second secondary coil 430 coupled to each other, the first end of the first secondary coil 420 is respectively connected to the positive electrode of the first diode 610 and the negative electrode of the fifth diode 650, the second end of the first secondary coil 420 is respectively connected to the positive electrode of the second diode 620 and the negative electrode of the sixth diode 660, the positive electrode of the fifth diode 650 and the positive electrode of the sixth diode 660 are both grounded, the negative electrode of the first diode 610 is connected to the first end of the first inductor 730 of the first reactance component 710, the negative electrode of the second diode 620 is connected to the second inductor 730 of the first reactance component 710, and the negative electrode of the second diode 620 is connected to the second inductor 730 of the first reactance component 710. The first end of the second secondary coil 430 is connected to the anode of the third diode 630 and the cathode of the seventh diode 670 respectively, the second end of the second secondary coil 430 is connected to the anode of the fourth diode 640 and the cathode of the eighth diode 680 respectively, the anode of the seventh diode 670 and the anode of the eighth diode 680 are both grounded, the cathode of the third diode 630 is connected to the first end of the first inductor 730 of the second reactance component 720, the cathode of the fourth diode 640 is connected to the first end of the second inductor 740 of the second reactance component 720, the second end of the first inductor 730 of the first reactance component 710 is respectively connected to the second end of the second inductor 740 of the first reactance component 710, the second end of the first inductor 730 of the second reactance component 720 and the second end of the second inductor 740 of the second reactance component 720 to form a power output end, and the power output end is then connected to the load 800.

[0066] In some embodiments of the present invention, Figure 7 , 8 As shown in Figures 12 and 13, there are two power supply modules 100, the first rectifier unit includes a first rectifier component 510 and a second rectifier component 520, the first diode 610 constitutes at least part of the first rectifier component 510, and the second diode 620 constitutes at least part of the second rectifier component 520, that is, some diodes in the first rectifier component 510 are connected to the first reactance component 710, some diodes in the first rectifier component 510 are connected to the second reactance component 720, some diodes in the second rectifier component 520 are connected to the first reactance component 710, and some diodes in the second rectifier component 520 are connected to the second reactance component 720.

[0067] In some embodiments of the utility model, the transformer unit 400 includes a primary coil 410, a first secondary coil 420 and a second secondary coil 430 coupled to each other, the first end of the primary coil 410, the first end of the first secondary coil 420 and the first end of the second secondary coil 430 are mutually connected, the first rectifier component 510 also includes at least a third diode 630, the second rectifier component 520 also includes at least a fourth diode 640, the reactance components have two, the first end of the first secondary coil 420 is connected to the input end of the first diode 610, the second end of the first secondary coil 420 is connected to the input end of the third diode 630, the first end of the second secondary coil 430 is connected to the input end of the second diode 620, and the second end of the second secondary coil 430 is connected to The input end of the fourth diode 640 is connected, the output end of the first diode 610 is connected to the first end of the first inductor 730 in one of the reactance components, the output end of the third diode 630 is connected to the first end of the second inductor 740 in one of the reactance components, the output end of the second diode 620 is connected to the first end of the second inductor 740 in another reactance component, the output end of the fourth diode 640 is connected to the first end of the first inductor 730 in another reactance component, and the second end of the first inductor 730 in one of the reactance components is respectively connected to the second end of the second inductor 740 in one of the reactance components, the second end of the first inductor 730 in another reactance component and the second end of the second inductor 740 in another reactance component to form the power supply output end.

[0068] Specifically, the first rectifying component 510 and the second rectifying component 520 may be full-wave rectifying circuits, such as Figure 7As shown, the first end of the first secondary coil 420 is connected to the anode of the first diode 610, the second end of the first secondary coil 420 is connected to the anode of the third diode 630, the first end of the second secondary coil 430 is connected to the anode of the second diode 620, the second end of the second secondary coil 430 is connected to the anode of the fourth diode 640, the cathode of the first diode 610 is connected to the first end of the first inductor 730 in the first reactance component 710, the cathode of the third diode 630 is connected to the second inductor 740 in the first reactance component 710 The first end of the second inductor 740 is connected to the cathode of the second diode 620 and the first end of the second inductor 740 in the second reactance component 720. The cathode of the fourth diode 640 is connected to the first end of the first inductor 730 in the second reactance component 720. The second end of the first inductor 730 in the first reactance component 710 is respectively connected to the second end of the second inductor 740 in the first reactance component 710, the second end of the first inductor 730 in the second reactance component 720 and the second end of the second inductor 740 in the second reactance component 720 to form a power supply output end.

[0069] In some embodiments of the present invention, Fig.12 As shown, the first rectifying component 510 and the second rectifying component 520 may be full-bridge rectifying circuits, the first rectifying component 510 further includes a fifth diode 650 and a sixth diode 660 , and the second rectifying unit 200 further includes a seventh diode 670 and an eighth diode 680 .

[0070] The first end of the first secondary coil 420 is connected to the anode of the first diode 610 and the cathode of the fifth diode 650, respectively. The second end of the first secondary coil 420 is connected to the anode of the third diode 630 and the cathode of the sixth diode 660, respectively. The first end of the second secondary coil 430 is connected to the anode of the second diode 620 and the cathode of the seventh diode 670, respectively. The second end of the second secondary coil 430 is connected to the anode of the fourth diode 640 and the cathode of the eighth diode 680, respectively. The cathodes of the fifth diode 650, the sixth diode 660, the seventh diode 670 and the eighth diode 680 are all grounded. The cathode of the first diode 610 is connected to the cathode of the first diode 610. The first end of the first inductor 730 in the reactance component 710 is connected, the cathode of the third diode 630 is connected to the first end of the second inductor 740 in the first reactance component 710, the cathode of the second diode 620 is connected to the first end of the second inductor 740 in the second reactance component 720, the cathode of the fourth diode 640 is connected to the first end of the first inductor 730 in the second reactance component 720, and the second end of the first inductor 730 in the first reactance component 710 is respectively connected to the second end of the second inductor 740 in the first reactance component 710, the second end of the first inductor 730 in the second reactance component 720, and the second end of the second inductor 740 in the second reactance component 720 to form a power supply output end.

[0071] In some embodiments of the utility model, the transformer unit 400 includes a primary coil 410, a first secondary coil 420 and a second secondary coil 430 coupled to each other, the first end of the primary coil 410, the first end of the first secondary coil 420 and the first end of the second secondary coil 430 are mutually connected, the first rectifier component 510 also includes at least a third diode 630, the second rectifier component 520 also includes at least a fourth diode 640, the reactance components have two, the first end of the first secondary coil 420 is connected to the input end of the first diode 610, the second end of the first secondary coil 420 is connected to the input end of the third diode 630, the first end of the second secondary coil 430 is connected to the input end of the second diode 620, and the second end of the second secondary coil 430 is connected to The input end of the fourth diode 640 is connected, the output end of the first diode 610 is connected to the first end of the first inductor 730 in one of the reactance components, the output end of the second diode 620 is connected to the first end of the second inductor 740 in one of the reactance components, the output end of the third diode 630 is connected to the first end of the first inductor 730 in another reactance component, the output end of the fourth diode 640 is connected to the first end of the second inductor 740 in another reactance component, and the second end of the first inductor 730 in one of the reactance components is respectively connected to the second end of the second inductor 740 in one of the reactance components, the second end of the first inductor 730 in another reactance component, and the second end of the second inductor 740 in another reactance component to form the power supply output end.

[0072] Specifically, the first rectifying component 510 and the second rectifying component 520 may be full-wave rectifying circuits, such as Figure 8As shown, the first end of the first secondary coil 420 is connected to the anode of the first diode 610, the second end of the first secondary coil 420 is connected to the anode of the third diode 630, the first end of the second secondary coil 430 is connected to the anode of the second diode 620, the second end of the second secondary coil 430 is connected to the anode of the fourth diode 640, the cathode of the first diode 610 is connected to the first end of the first inductor 730 in the first reactance component 710, the cathode of the second diode 620 is connected to the first end of the second inductor 740 in the first reactance component 710, The output end of the third diode 630 is connected to the first end of the first inductor 730 in the second reactance component 720, the output end of the fourth diode 640 is connected to the first end of the second inductor 740 in the second reactance component 720, and the second end of the first inductor 730 in the first reactance component 710 is respectively connected to the second end of the second inductor 740 in the first reactance component 710, the second end of the first inductor 730 in the second reactance component 720, and the second end of the second inductor 740 in the second reactance component 720 to form a power supply output end.

[0073] In some embodiments of the present invention, Fig.13 As shown, the first rectifying component 510 and the second rectifying component 520 may be full-bridge rectifying circuits, the first rectifying unit further includes a fifth diode 650 and a sixth diode 660 , and the second rectifying unit 200 further includes a seventh diode 670 and an eighth diode 680 .

[0074] The first end of the first secondary coil 420 is connected to the anode of the first diode 610 and the cathode of the fifth diode 650, respectively. The second end of the first secondary coil 420 is connected to the anode of the third diode 630 and the cathode of the sixth diode 660, respectively. The first end of the second secondary coil 430 is connected to the anode of the second diode 620 and the cathode of the seventh diode 670, respectively. The second end of the second secondary coil 430 is connected to the anode of the fourth diode 640 and the cathode of the eighth diode 680, respectively. The cathodes of the fifth diode 650, the sixth diode 660, the seventh diode 670 and the eighth diode 680 are all grounded. The cathode of the first diode 610 is connected to the cathode of the first diode 610. The first end of the first inductor 730 in the reactance component 710 is connected, the cathode of the second diode 620 is connected to the first end of the second inductor 740 in the first reactance component 710, the output end of the third diode 630 is connected to the first end of the first inductor 730 in the second reactance component 720, the output end of the fourth diode 640 is connected to the first end of the second inductor 740 in the second reactance component 720, and the second end of the first inductor 730 in the first reactance component 710 is respectively connected to the second end of the second inductor 740 in the first reactance component 710, the second end of the first inductor 730 in the second reactance component 720, and the second end of the second inductor 740 in the second reactance component 720 to form a power supply output end.

[0075] The welding machine according to the second aspect of the present invention comprises a distributed output rectification and filtering modular power conversion device disclosed in any of the above embodiments, and the power output end is connected to the welding gun of the welding machine to provide welding power for the welding gun.

[0076] The welding machine of the utility model can be a gas shielded welding machine, etc., and uses a distributed output rectification and filtering modular power conversion device disclosed in any of the above embodiments to reduce the parameter specifications of the selected components, reduce the manufacturing cost, reduce the volume and weight, have high flexibility in the modulation output range, and improve the dynamic characteristics of the circuit.

[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, those skilled in the art will appreciate 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 distributed output rectification and filtering modular power conversion device, characterized in that: It comprises a plurality of power supply modules, and the power output ends of the plurality of power supply modules are connected to supply power to a load; The power supply module includes an inverter unit, a transformer unit, a first rectifier unit and at least one reactance component, the input end of the inverter unit is used to connect to a power supply, the output end of the inverter unit is connected to the input end of the transformer unit, the output end of the transformer unit is connected to the input end of the first rectifier unit, the first rectifier unit includes at least a first diode and a second diode, the reactance component includes a first inductor and a second inductor, the output end of the first diode is connected to the first end of the first inductor, the output end of the second diode is connected to the first end of the second inductor, and the second end of the first inductor is connected to the second end of the second inductor to form a power output end.

2. A distributed output rectification and filtering modular power conversion device according to claim 1, characterized in that: The first inductor and the second inductor are coupled to each other, wherein current can flow from a first end of the first inductor to a second end of the first inductor and from a first end of the second inductor to a second end of the second inductor, and a magnetic flux generated by the current flowing through the first inductor and a magnetic flux generated by the current flowing through the second inductor can cancel each other out.

3. A distributed output rectification and filtering modular power conversion device according to claim 1, characterized in that: The power output ends of the multiple power supply modules can be detachably connected to each other, and each power supply module can start or stop power output.

4. A distributed output rectification and filtering modular power conversion device according to claim 1, characterized in that: It also includes a control module, which is respectively connected to the inverter units in different power supply modules so that the power outputs of different power supply modules are different.

5. A distributed output rectification and filtering modular power conversion device according to claim 1, characterized in that: The first rectifying unit at least includes a first rectifying component, and the first diode and the second diode constitute at least a part of the first rectifying component.

6. A distributed output rectification and filtering modular power conversion device according to claim 5, characterized in that: The first rectifier unit also includes a second rectifier component, and there are two reactance components. The first diode and the second diode are correspondingly connected to the first inductor and the second inductor in one of the reactance components. The second rectifier component at least includes a third diode and a fourth diode. The output end of the third diode is connected to the first end of the first inductor in the other reactance component, and the output end of the fourth diode is connected to the second end of the second inductor in the other reactance component. The second end of the first inductor in one of the reactance components is respectively connected to the second end of the second inductor in one of the reactance components, the second end of the first inductor in the other reactance component, and the second end of the second inductor in the other reactance component to form the power supply output end.

7. A distributed output rectification and filtering modular power conversion device according to claim 5, characterized in that: The first rectifying unit includes a first rectifying component and a second rectifying component. The first diode constitutes at least a part of the first rectifying component, and the second diode constitutes at least a part of the second rectifying component.

8. A distributed output rectification and filtering modular power conversion device according to claim 7, characterized in that: The transformer unit includes a primary coil, a first secondary coil and a second secondary coil coupled to each other, the first end of the primary coil, the first end of the first secondary coil and the first end of the second secondary coil are mutually connected with the same end, the first rectifier component also includes at least a third diode, the second rectifier component also includes at least a fourth diode, there are two reactance components, the first end of the first secondary coil is connected to the input end of the first diode, the second end of the first secondary coil is connected to the input end of the third diode, the first end of the second secondary coil is connected to the input end of the second diode, the second end of the second secondary coil is connected to the input end of the fourth diode, and the The output end of the first diode is connected to the first end of the first inductor in one of the reactance components, the output end of the third diode is connected to the first end of the second inductor in one of the reactance components, the output end of the second diode is connected to the first end of the second inductor in another of the reactance components, the output end of the fourth diode is connected to the first end of the first inductor in another of the reactance components, and the second end of the first inductor in one of the reactance components is respectively connected to the second end of the second inductor in one of the reactance components, the second end of the first inductor in another of the reactance components, and the second end of the second inductor in another of the reactance components to form the power supply output end.

9. A distributed output rectification and filtering modular power conversion device according to claim 7, characterized in that: The transformer unit includes a primary coil, a first secondary coil and a second secondary coil coupled to each other, the first end of the primary coil, the first end of the first secondary coil and the first end of the second secondary coil are mutually connected with the same end, the first rectifier component also includes at least a third diode, the second rectifier component also includes at least a fourth diode, there are two reactance components, the first end of the first secondary coil is connected to the input end of the first diode, the second end of the first secondary coil is connected to the input end of the third diode, the first end of the second secondary coil is connected to the input end of the second diode, the second end of the second secondary coil is connected to the input end of the fourth diode, and the The output end of the first diode is connected to the first end of the first inductor in one of the reactance components, the output end of the second diode is connected to the first end of the second inductor in one of the reactance components, the output end of the third diode is connected to the first end of the first inductor in another of the reactance components, the output end of the fourth diode is connected to the first end of the second inductor in another of the reactance components, and the second end of the first inductor in one of the reactance components is respectively connected to the second end of the second inductor in one of the reactance components, the second end of the first inductor in another of the reactance components, and the second end of the second inductor in another of the reactance components to form the power supply output end.

10. A welding machine, characterized in that: It comprises a distributed output rectification and filtering modular power conversion device as described in any one of claims 1 to 9, wherein the power output end is connected to a welding gun of a welding machine to provide welding power for the welding gun.

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