Multi-power parallel connection device for consumable electrode welding and use method thereof

Abstract

The present invention provides a consumable electrode welding multi-power parallel device and a use method, the device comprising: a main welding power supply of a constant voltage source and a main controller are connected in series to form a first parallel branch; a slave welding power supply of a constant current source and a slave controller are connected in series to form a group of parallel branches, each group of parallel branches is connected in parallel at both ends of the first parallel branch, and the parallel branches are graded according to the connection sequence; the main controller is used to receive the current output demand of the parallel circuit, control the current waveform output by the main welding power supply; perform current distribution, control the current value output by the main welding power supply according to the distribution result; send the current output demand to the slave controller in the next level parallel branch; the slave controller is used to receive the current output demand issued by the main controller, or the current output demand issued by the upper level slave controller; perform current distribution according to the received demand, control the current value output by the slave welding power supply according to the distribution result; send the current output demand to the next level slave controller.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a consumable electrode welding multi-power parallel connection device and a use method thereof. Background Art

[0002] High-power welding is an effective means to improve the welding efficiency of medium and thick plates. The current methods to solve high-power welding are: single power supply high power, dual power supply coordinated dual wire, and power supply parallel technology. There are two mainstream directions of power supply parallel technology: internal parallel connection of power supplies and parallel connection between power supplies.

[0003] Among them, the power supply parallel connection technology refers to the purpose of achieving high power output of a device through the parallel connection of power devices. The power supply parallel connection refers to the parallel connection and coordination technology between two or more independent power supplies to achieve high power output. However, due to the control of welding waveform, the difficulty of power supply parallel connection lies in the coordinated output between different power supplies, and it is impossible to ensure that the total current and voltage waveform of multiple power supply outputs meets the waveform control requirements of welding. Summary of the invention

[0004] The object of the present invention is to provide a multi-power parallel connection device for consumable electrode welding with coordinated output of multiple power sources and a method for using the same.

[0005] In order to achieve the above-mentioned object, an embodiment of the present invention provides a consumable electrode welding multi-power parallel connection device, comprising:

[0006] a master welding power source, a master controller, at least one slave welding power source, and at least one slave controller;

[0007] The main welding power source and the main controller are connected in series to form a first parallel branch, and the main welding power source is a constant voltage source;

[0008] A slave welding power source and a slave controller are connected in series to form a group of parallel branches, each group of parallel branches is connected in parallel at both ends of the first parallel branch, and the parallel branches are graded according to the connection sequence; the slave welding power source is a constant current source;

[0009] The main controller is used to receive the current output demand of the parallel circuit, and control the current waveform output by the main welding power supply according to the current output demand of the parallel circuit; perform current distribution according to the current output demand of the parallel circuit, and control the current value output by the main welding power supply according to the distribution result; and send the current output demand to the slave controller in the next-level parallel branch according to the distribution result;

[0010] The slave controller is used to receive the current output demand issued by the main controller in the first parallel branch, or the current output demand issued by the slave controller in the previous parallel branch; distribute the current according to the received current output demand, and control the current value output from the welding power supply according to the distribution result; and send the current output demand to the slave controller in the next parallel branch according to the distribution result.

[0011] The master controller communicates with the slave controller, and the slave controllers communicate with each other via IO carrier communication.

[0012] In a specific embodiment, the main controller is specifically used to: control the current waveform output by the main welding power source according to the current output requirement of the parallel circuit, so that the current waveforms output by all parallel branches meet the welding current waveform requirements.

[0013] During specific implementation, the main controller is specifically used to: distribute current according to the current output requirement of the parallel circuit and the output load of the main welding power supply, and determine the output current value of the main welding power supply.

[0014] In a specific embodiment, the slave controller is specifically used to: distribute current according to the received current output demand and the output load of the slave welding power supply, and determine the output current value of the slave welding power supply connected in series with the slave controller.

[0015] The embodiment of the present invention also provides a method for using a consumable electrode welding multi-power parallel connection device to ensure coordinated output of multiple power sources, which includes:

[0016] The main controller receives a current output demand of the parallel circuit;

[0017] The main controller controls the current waveform output by the main welding power source according to the current output requirements of the parallel circuit;

[0018] The main controller distributes the current according to the current output requirements of the parallel circuit; the main controller controls the current value output by the main welding power source according to the distribution result, and sends the current output requirements to the slave controllers in the next-level parallel branch according to the distribution result;

[0019] The slave controller in the next parallel branch of the first parallel branch receives the current output demand issued by the master controller in the first parallel branch; distributes the current according to the received current output demand; controls the current value output by the slave welding power source connected in series with the slave controller according to the distribution result; and sends the current output demand to the slave controller in the next parallel branch according to the distribution result;

[0020] Starting from the parallel branch of the next level after the first parallel branch, the slave controller in each level of the parallel branch receives the current output demand issued by the slave controller in the parallel branch of the previous level; current distribution is performed according to the received current output demand, and the current value output by the welding power supply in the parallel branch is controlled according to the distribution result; and the current output demand is sent to the slave controller in the parallel branch of the next level according to the distribution result;

[0021] After the slave controller in the last parallel branch receives the current output demand, current distribution is performed according to the received current output demand, and the current value output by the slave welding power supply in the last parallel branch is controlled according to the distribution result.

[0022] In a specific embodiment, current distribution is performed according to the current output requirement of the parallel circuit, including:

[0023] The main controller distributes the current according to the current output requirement of the parallel circuit and the output load of the main welding power supply, and determines the output current value of the main welding power supply;

[0024] Current distribution is performed according to the received current output demand, and the current value output from the welding power source in the parallel branch is controlled according to the distribution result, including:

[0025] The slave controller distributes the current according to the received current output demand and the output load of the slave welding power source in the parallel branch, and determines the output current value of the slave welding power source in the parallel branch.

[0026] In specific implementation, according to the allocation result, the current output demand is sent to the slave controller in the next-level parallel branch, including:

[0027] According to the allocation result, the master controller uses IO carrier communication technology to send the current output demand to the slave controller in the next parallel branch;

[0028] According to the allocation result, the current output requirement is sent to the slave controller in the parallel branch of the next level, including:

[0029] According to the allocation result, the slave controller sends the current output demand to the slave controller in the parallel branch of the next level using IO carrier communication technology.

[0030] In a specific embodiment, the main controller controls the current waveform output by the main welding power source according to the current output requirement of the parallel circuit, including:

[0031] The main controller controls the current waveform output by the main welding power source according to the current output requirement of the parallel circuit, so that the current waveforms output by all parallel branches meet the welding current waveform requirement.

[0032] The embodiment of the present invention is provided with a main welding power supply, a main controller, at least one slave welding power supply and at least one slave controller; the main welding power supply and the main controller are connected in series to form a first parallel branch, and the main welding power supply is a constant voltage source; a slave welding power supply and a slave controller are connected in series to form a group of parallel branches, each group of parallel branches is connected in parallel at both ends of the first parallel branch, and the parallel branches are graded according to the connection sequence; and the slave welding power supply is a constant current source; the main controller is provided to receive the current output demand of the parallel circuit, and according to the current output demand of the parallel circuit, the current waveform output by the main welding power supply is controlled; according to the current output demand of the parallel circuit, current distribution is performed, and the current value output by the main welding power supply is controlled according to the distribution result; according to the distribution result, the current output demand is sent to the slave controller in the next parallel branch; the slave controller is provided to receive the current output demand issued by the main controller in the first parallel branch, or the current output demand issued by the slave controller in the previous parallel branch; according to the received current output demand, current distribution is performed, and according to the distribution result, the current value output by the slave welding power supply is controlled; according to the distribution result, the current output demand is sent to the slave controller in the next parallel branch. By setting the main controller to control the output current waveform, the waveform output by multiple power supplies in parallel can meet the demand, and each parallel branch can only send the current output demand to the parallel branch of the next level, that is, the unidirectional current distribution of the parallel branches at each level, ensuring that the current distribution is accurate and does not interfere with each other, thereby ensuring coordinated output of multiple power supplies. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0034] Figure 1 1 is a schematic structural diagram of a multi-power parallel connection device for consumable electrode welding according to an embodiment of the present invention;

[0035] Figure 2 It is a schematic diagram of the implementation process of the method for using the consumable electrode welding multi-power parallel device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The present application is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present application will become clearer and more specific.

[0037] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0038] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0039] The embodiment of the present invention provides a consumable electrode welding multi-power parallel connection device, which is used to ensure the coordinated output of multiple power supplies when multiple consumable electrode welding power supplies are connected in parallel. The circuit connection relationship diagram of the device is as follows: Figure 1 As shown, including:

[0040] A master welding power source 101, a master controller 102, at least one slave welding power source 201 and at least one slave controller 202;

[0041] The main welding power source 101 and the main controller 102 are connected in series to form a first parallel branch, and the main welding power source 101 is a constant voltage source;

[0042] A slave welding power source 201 and a slave controller 202 are connected in series to form a group of parallel branches, each group of parallel branches is connected in parallel to the two ends of the first parallel branch, and the parallel branches are graded according to the connection sequence; the slave welding power source 201 is a constant current source;

[0043] The main controller 102 is used to receive the current output demand of the parallel circuit, and control the current waveform output by the main welding power supply 101 according to the current output demand of the parallel circuit; perform current distribution according to the current output demand of the parallel circuit, and control the current value output by the main welding power supply 101 according to the distribution result; and send the current output demand to the slave controller 202 in the next-level parallel branch according to the distribution result;

[0044] The slave controller 202 is used to receive the current output demand issued by the main controller 102 in the first parallel branch, or the current output demand issued by the slave controller 202 in the previous parallel branch; distribute the current according to the received current output demand, and control the current value output from the welding power supply 201 according to the distribution result; and send the current output demand to the slave controller 202 in the next parallel branch according to the distribution result.

[0045] In a specific embodiment, a main welding power source 101, a main controller 102, at least one slave welding power source 201 and at least one slave controller 202 are provided; the main welding power source 101 and the main controller 102 are connected in series to form a first parallel branch, and the main welding power source 101 is a constant voltage source; a slave welding power source 201 and a slave controller 202 are connected in series to form a group of parallel branches, each group of parallel branches is connected in parallel at both ends of the first parallel branch, and the parallel branches are graded according to the connection sequence; and the slave welding power source 201 is a constant current source; the main controller 102 is provided to receive the current output demand of the parallel circuit, and the main welding power source 101 is controlled according to the current output demand of the parallel circuit. 1 output current waveform; according to the current output demand of the parallel circuit, current distribution is performed, and the current value output by the main welding power supply 101 is controlled according to the distribution result; according to the distribution result, the current output demand is sent to the slave controller 202 in the next parallel branch; the slave controller 202 is set to receive the current output demand issued by the main controller 102 in the first parallel branch, or the current output demand issued by the slave controller 202 in the previous parallel branch; according to the received current output demand, current distribution is performed, and the current value output by the slave welding power supply 201 is controlled according to the distribution result; according to the distribution result, the current output demand is sent to the slave controller 202 in the next parallel branch. By setting the main controller 102 to control the output current waveform, the waveform output after multiple power supplies are connected in parallel meets the demand, and each parallel branch can only send the current output demand to the parallel branch of the next level, that is, the unidirectional current distribution of the parallel branches of each level ensures that the current distribution is accurate and does not interfere with each other, thereby ensuring the coordinated output of multiple power supplies.

[0046] Among them, the parallel circuit current output demand refers to some requirements for the welding current output by the melting electrode welding multi-power parallel device during welding, including requirements for current size and current waveform.

[0047] Among them, the main welding power source 101 is a constant voltage source, that is, it adopts the output characteristics of macroscopic constant voltage; the slave welding power source 201 is a constant current source, that is, it adopts the output characteristics of constant current, which can be a stable single current output or a pulse current output. And the main welding power source 101 and the slave welding power source 201 are independent welding power sources, each power source can weld independently, and can also achieve higher power welding through a parallel solution. For example, if there are 3 power sources in parallel, and the output load duration rate of each power source is 400A, 100%, then each power source can independently output a maximum of 400A, 100%, and can also achieve a load output of 1200A, 100% through the parallel solution provided in the embodiment of the present invention.

[0048] like Figure 1As shown, the master welding power source 101 is connected in series with each slave welding power source 201 in a unidirectional manner. According to the connection sequence of each slave welding power source 201 in the serial connection, the parallel branch level in which it is located can be determined. For example, Figure 1 As shown, from level 1, level 2, ... to level n.

[0049] The main controller 102 is used to receive the current output demand of the parallel circuit, and control the current waveform output by the main welding power supply 101 according to the current output demand of the parallel circuit. In a specific embodiment, the main controller 102 is specifically used to: control the current waveform output by the main welding power supply 101 according to the current output demand of the parallel circuit, so that the current waveforms output by all parallel branches meet the welding current waveform requirements, that is, the waveform of the current output by the consumable electrode welding multi-power supply parallel device provided in the embodiment of the present invention displayed on the oscilloscope is consistent with the current waveform required for welding.

[0050] The main controller 102 is used to distribute the current according to the current output requirement of the parallel circuit, and control the current value output by the main welding power supply 101 according to the distribution result. In a specific embodiment, the main controller 102 is specifically used to distribute the current according to the current output requirement of the parallel circuit and the output load of the main welding power supply 101, and determine the output current value of the main welding power supply 101. For example, the current output requirement of the parallel circuit is an output current value of 1200A, and the output load of the main welding power supply 101 is a maximum output of 400A. The main controller 102 compares the two, and the current value allocated to the output of the main welding power supply 101 is less than or equal to 400A, and accordingly determines to send the current output requirement to the slave controller 202 in the next parallel branch. For example, if the main controller 102 controls the main welding power supply 101 to output 350A, the current output requirement sent to the slave controller 202 in the next parallel branch is 850A. It can be understood by those skilled in the art that this example is only an example and does not limit the protection scope of the embodiment of the present invention.

[0051] Accordingly, the slave controller 202 is specifically used to: perform current distribution according to the received current output demand and the output load of the slave welding power source 201, and determine the output current value of the slave welding power source 201 connected in series with the slave controller 202, for example, Figure 1The slave controller 202 in the first-level parallel branch receives a current output demand of 850A, while the output load of the slave welding power source 201 is only the maximum output of 300A. The slave controller 202 compares the current output demand of 850A with the output load of the maximum output of 300A, distributes the current, controls the slave welding power source 201 in the first-level parallel branch to output 300A, and sends a current output demand of 550A to the slave controller 202 in the second-level parallel branch. The parallel branches distribute the current in sequence and send the current output demand to the next level until the last parallel branch, thereby realizing a unidirectional connection between the main welding power source 101 and the lower-level slave welding power source 201, and a unidirectional connection between the upper-level slave welding power source 201 and the lower-level slave welding power source 201, thereby realizing a unidirectional current distribution from top to bottom.

[0052] In order to meet the real-time requirements, the master controller 102 communicates with the slave controller 202, and the slave controller 202 communicates with the slave controller 202 through the IO carrier communication mode. That is, when the master controller 102 sends a current output demand to the slave controller 202, the slave controller 202 receives a current output demand issued by the master controller 102, the slave controller 202 sends a current output demand to the slave controller 202 in the next-level parallel branch, and the slave controller 202 receives a current output demand issued by the slave controller 202 in the previous-level parallel branch, all of these are achieved using the IO carrier communication technology. Specifically, carrier communication is a telephone multi-channel communication system based on frequency division multiplexing technology, which belongs to the standard of classic analog communication. IO carrier communication refers to a technology that uses carrier communication technology to achieve real-time communication between communication devices through an IO interface.

[0053] Based on the same inventive concept, the embodiment of the present invention also provides a method for using a consumable electrode welding multi-power parallel device. The principle of solving the problem is similar to that of the consumable electrode welding multi-power parallel device. The repeated parts will not be repeated. The specific process is as follows: Figure 2 As shown, including:

[0054] Step S1: the main controller 102 receives a current output requirement of a parallel circuit;

[0055] Step S2: the main controller 102 controls the current waveform output by the main welding power source 101 according to the current output requirement of the parallel circuit;

[0056] Step S3: the main controller 102 distributes the current according to the current output requirement of the parallel circuit; the main controller 102 controls the current value output by the main welding power source 101 according to the distribution result, and sends the current output requirement to the slave controller 202 in the next-level parallel branch according to the distribution result;

[0057] Step S4: The slave controller 202 in the next parallel branch of the first parallel branch receives the current output demand issued by the master controller 102 in the first parallel branch; performs current distribution according to the received current output demand; controls the current value outputted by the slave welding power source 201 connected in series with the slave controller 202 according to the distribution result; and sends the current output demand to the slave controller 202 in the next parallel branch according to the distribution result;

[0058] Step S5: starting from the parallel branch of the next level after the first parallel branch, the slave controller 202 in each level of the parallel branch receives the current output demand issued by the slave controller 202 in the parallel branch of the previous level; current distribution is performed according to the received current output demand, and the current value output by the slave welding power supply 201 in the parallel branch is controlled according to the distribution result; and the current output demand is sent to the slave controller 202 in the parallel branch of the next level according to the distribution result;

[0059] Step S6: After the slave controller 202 in the last parallel branch receives the current output demand, current distribution is performed according to the received current output demand, and the current value output by the slave welding power supply 201 in the last parallel branch is controlled according to the distribution result.

[0060] When step 202 is specifically implemented, the main controller 102 controls the current waveform output by the main welding power source 101 according to the current output requirement of the parallel circuit, so that the current waveforms output by all parallel branches meet the welding current waveform requirement.

[0061] In a specific embodiment, in step S3, the main controller 102 performs current distribution according to the current output demand of the parallel circuit, including: the main controller 102 performs current distribution according to the current output demand of the parallel circuit and the output load of the main welding power supply 101, and determines the output current value of the main welding power supply 101. Correspondingly, in step S4, current distribution is performed according to the received current output demand, including: the slave controller 202 in the next-level parallel branch of the first parallel branch performs current distribution according to the received current output demand and the output load of the slave welding power supply 201 connected thereto, and determines the output current value of the slave welding power supply 201 in the parallel branch. In step S5, current distribution is performed according to the received current output demand, and the current value output by the slave welding power supply 201 in the parallel branch is controlled according to the distribution result, including: the slave controller 202 performs current distribution according to the received current output demand and the output load of the slave welding power supply 201 in the parallel branch, and determines the output current value of the slave welding power supply 201 in the parallel branch.

[0062] In order to meet the requirements of real-time performance, in a specific embodiment, in step S3, according to the allocation result, the current output requirement is sent to the slave controller 202 in the next parallel branch, including: according to the allocation result, the master controller 102 sends the current output requirement to the slave controller 202 in the next parallel branch using the IO carrier communication technology. In step S4, the current output requirement issued by the master controller 102 in the first parallel branch is received, including: the slave controller 202 receives the current output requirement issued by the master controller 102 in the first parallel branch using the IO carrier communication technology. According to the allocation result, the current output requirement is sent to the slave controller 202 in the next parallel branch, including: according to the allocation result, the slave controller 202 sends the current output requirement to the slave controller 202 in the next parallel branch using the IO carrier communication technology. In step S5, the current output requirement issued by the slave controller 202 in the previous parallel branch is received, including: the slave controller 202 receives the current output requirement issued by the slave controller 202 in the previous parallel branch using the IO carrier communication technology. Sending the current output requirement to the slave controller 202 in the parallel branch of the next level according to the allocation result includes: according to the allocation result, the slave controller 202 sends the current output requirement to the slave controller 202 in the parallel branch of the next level using the IO carrier communication technology. In step S6, the slave controller 202 receives the current output requirement, including: the slave controller 202 receives the current output requirement using the IO carrier communication technology.

[0063] Through the above-mentioned method of use, a top-down current distribution method is realized, that is, the main welding power supply 101 distributes the current value output by the first-level slave welding power supply 201 according to the current distribution rule, and the first-level slave welding power supply 201 distributes the current value output by the second-level slave welding power supply 201, and so on. For example: it is necessary to set the output welding current of 1200A, and the main welding power supply 101 only retains 400A output capacity according to its own output capacity, and distributes it to the first-level slave welding power supply 201800A through the initial current, and so on. Note that the distribution method described in this example is only an example and does not represent the actual current distribution rule. In this way, a one-way current distribution is realized, that is, the main welding power supply 101 can distribute the current to the first-level slave welding power supply 201 through the initial current distribution, but the first-level slave welding power supply 201 cannot distribute the current to the main welding power supply 101, and can only distribute it to the second-level slave welding power supply 201.

[0064] In summary, the consumable electrode welding multi-power parallel connection device and use method provided in this specific embodiment have the following advantages:

[0065] By setting a main controller to control the output current waveform, the waveform output by multiple power supplies in parallel can meet the demand; each parallel branch can only send the current output demand to the parallel branch of the next level, so as to realize unidirectional current distribution of each level of parallel branches, ensure the current distribution is accurate and does not interfere with each other, thereby ensuring the coordinated output of multiple power supplies; by applying IO carrier communication technology, the real-time information transmission is realized, thereby realizing the real-time provision of the current required for welding by the multi-power supply parallel device for melting electrode welding.

[0066] Although the present invention provides method operation steps as described in the embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the actual device or client product is executed, it can be executed in sequence or in parallel according to the method shown in the embodiments or the drawings (for example, in a parallel processor or multi-threaded processing environment).

[0067] It should be understood by those skilled in the art that the embodiments of this specification may be provided as methods, devices (systems) or computer program products. Therefore, the embodiments of this specification may take the form of complete hardware embodiments, complete software embodiments or embodiments combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0068] The present invention is described with reference to flowcharts and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as a combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0069] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0070] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0071] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0072] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention is not limited to any single aspect, nor to any single embodiment, nor to any combination and / or replacement of these aspects and / or embodiments. Moreover, each aspect and / or embodiment of the present invention may be used alone or in combination with one or more other aspects and / or embodiments thereof.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A consumable electrode welding multi-power parallel device, characterized in that: include: a master welding power source, a master controller, at least one slave welding power source, and at least one slave controller; The main welding power source and the main controller are connected in series to form a first parallel branch, and the main welding power source is a constant voltage source; A slave welding power source and a slave controller are connected in series to form a group of parallel branches, each group of parallel branches is connected in parallel at both ends of the first parallel branch, and all parallel branches composed of slave welding power sources and slave controllers are graded according to the connection sequence; the slave welding power source is a constant current source; The main controller is used to receive the current output demand of the parallel circuit, and control the current waveform output by the main welding power source according to the current output demand of the parallel circuit; According to the current output requirements of the parallel circuit, current distribution is performed, and the current value output by the main welding power supply is controlled according to the distribution results; according to the distribution results, the current output requirements are sent to the slave controller in the next-level parallel branch; The slave controller is used to receive the current output demand issued by the main controller in the first parallel branch, or the current output demand issued by the slave controller in the upper parallel branch; distribute the current according to the received current output demand, and control the current value output from the welding power source according to the distribution result; send the current output demand to the slave controller in the next parallel branch according to the distribution result; The slave controller is used to receive the current output demand issued by the master controller in the first parallel branch, or the current output demand issued by the slave controller in the upper parallel branch; distribute the current according to the received current output demand, and control the current value output from the welding power source according to the distribution result; According to the allocation result, the current output requirement is sent to the slave controller in the next parallel branch, including: The slave controller in the next parallel branch of the first parallel branch receives the current output demand issued by the master controller in the first parallel branch; distributes the current according to the received current output demand; controls the current value output by the slave welding power source connected in series with the slave controller according to the distribution result; and sends the current output demand to the slave controller in the next parallel branch according to the distribution result; Starting from the parallel branch of the next level after the first parallel branch, the slave controller in each level of the parallel branch receives the current output demand issued by the slave controller in the parallel branch of the previous level; current distribution is performed according to the received current output demand, and the current value output by the welding power supply in the parallel branch is controlled according to the distribution result; and the current output demand is sent to the slave controller in the parallel branch of the next level according to the distribution result; After the slave controller in the last parallel branch receives the current output demand, current distribution is performed according to the received current output demand, and the current value output by the slave welding power supply in the last parallel branch is controlled according to the distribution result.

2. The consumable electrode welding multi-power parallel device according to claim 1, characterized in that: The master controller communicates with the slave controller, and the slave controllers communicate with each other via IO carrier communication.

3. The consumable electrode welding multi-power parallel device according to claim 1, characterized in that: The main controller is specifically used to control the current waveform output by the main welding power source according to the current output requirement of the parallel circuit, so that the current waveforms output by all parallel branches meet the welding current waveform requirements.

4. The consumable electrode welding multi-power parallel connection device according to claim 1, characterized in that: The main controller is specifically used to distribute current and determine the output current value of the main welding power source according to the current output requirement of the parallel circuit and the output load of the main welding power source.

5. The consumable electrode welding multi-power parallel connection device according to claim 1, characterized in that: The slave controller is specifically used to distribute current according to the received current output demand and the output load of the slave welding power supply, and determine the output current value of the slave welding power supply connected in series with the slave controller.

6. A method for using the consumable electrode welding multi-power parallel connection device according to any one of claims 1 to 5, characterized in that: include: The main controller receives a current output demand of the parallel circuit; The main controller controls the current waveform output by the main welding power source according to the current output requirements of the parallel circuit; The main controller distributes the current according to the current output requirements of the parallel circuit; The main controller controls the current value output by the main welding power source according to the allocation result, and sends the current output demand to the slave controller in the next-level parallel branch according to the allocation result; The slave controller in the next parallel branch of the first parallel branch receives the current output demand issued by the master controller in the first parallel branch; distributes the current according to the received current output demand; controls the current value output by the slave welding power source connected in series with the slave controller according to the distribution result; and sends the current output demand to the slave controller in the next parallel branch according to the distribution result; Starting from the parallel branch of the next level after the first parallel branch, the slave controller in each level of the parallel branch receives the current output demand issued by the slave controller in the parallel branch of the previous level; current distribution is performed according to the received current output demand, and the current value output by the welding power supply in the parallel branch is controlled according to the distribution result; and the current output demand is sent to the slave controller in the parallel branch of the next level according to the distribution result; After the slave controller in the last parallel branch receives the current output demand, current distribution is performed according to the received current output demand, and the current value output by the slave welding power supply in the last parallel branch is controlled according to the distribution result.

7. The method for using the consumable electrode welding multi-power parallel device according to claim 6, characterized in that: According to the current output requirements of the parallel circuit, current distribution is performed, including: The main controller distributes the current according to the current output requirement of the parallel circuit and the output load of the main welding power supply, and determines the output current value of the main welding power supply; Current distribution is performed according to the received current output demand, and the current value output from the welding power source in the parallel branch is controlled according to the distribution result, including: The slave controller distributes the current according to the received current output demand and the output load of the slave welding power source in the parallel branch, and determines the output current value of the slave welding power source in the parallel branch.

8. The method for using the consumable electrode welding multi-power parallel connection device according to claim 6, characterized in that: According to the allocation result, the current output requirement is sent to the slave controller in the next parallel branch, including: According to the allocation result, the master controller uses IO carrier communication technology to send the current output demand to the slave controller in the next parallel branch; According to the allocation result, the current output requirement is sent to the slave controller in the parallel branch of the next level, including: According to the allocation result, the slave controller sends the current output demand to the slave controller in the parallel branch of the next level using IO carrier communication technology.

9. The method for using the consumable electrode welding multi-power parallel connection device according to claim 6, characterized in that: The main controller controls the current waveform output by the main welding power source according to the current output requirements of the parallel circuit, including: The main controller controls the current waveform output by the main welding power source according to the current output requirement of the parallel circuit, so that the current waveforms output by all parallel branches meet the welding current waveform requirement.

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