CN114709809B - Multi-power parallel connection device for consumable electrode welding and use method thereof - Google Patents
Multi-power parallel connection device for consumable electrode welding and use method thereof Download PDFInfo
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- CN114709809B CN114709809B CN202210345245.2A CN202210345245A CN114709809B CN 114709809 B CN114709809 B CN 114709809B CN 202210345245 A CN202210345245 A CN 202210345245A CN 114709809 B CN114709809 B CN 114709809B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/06—Two-wire DC power distribution systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/08—Three-wire DC power distribution systems; Systems having more than three wires
- H02J1/082—DC supplies with two or more different DC voltage levels
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/08—Three-wire DC power distribution systems; Systems having more than three wires
- H02J1/084—Three-wire DC power distribution systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/08—Three-wire DC power distribution systems; Systems having more than three wires
- H02J1/084—Three-wire DC power distribution systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J1/086—Three-wire DC power distribution systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load or loads and source or sources when the main path fails
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/10—Parallel operation of DC sources
- H02J1/109—Scheduling or re-scheduling the operation of the DC sources in a particular order, e.g. connecting or disconnecting the sources in sequential, alternating or in subsets, to meet a given demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
- H02J13/13—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network
- H02J13/1331—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network using wireless data transmission
- H02J13/1335—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network using wireless data transmission involving a local wireless network, e.g. Wi-Fi®, ZigBee® or Bluetooth®
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Inverter Devices (AREA)
- Arc Welding In General (AREA)
- Arc Welding Control (AREA)
Abstract
本发明提供了一种熔化极焊接多电源并联装置及使用方法，该装置包括：恒压源的主焊接电源和主控制器串联组成第一并联支路；一个恒流源的从焊接电源和一个从控制器串联组成一组并联支路，每组并联支路并联在第一并联支路的两端，按照连接顺序将并联支路分级；主控制器用于接收并联电路电流输出需求，控制主焊接电源输出的电流波形；进行电流分配，根据分配结果控制主焊接电源输出的电流值；向下一级并联支路中的从控制器发送电流输出需求；从控制器用于接收主控制器发出的电流输出需求，或上一级从控制器发出的电流输出需求；根据接收的需求进行电流分配，根据分配结果控制从焊接电源输出的电流值；向下一级从控制器发送电流输出需求。
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
The invention relates to the technical field of welding, in particular to a consumable electrode welding multi-power-supply parallel device and a use method thereof.
Background
High-power welding is an effective means for improving welding efficiency of medium plates. The prior method for solving the problem of high-power welding comprises the technologies of single power supply and high power supply, double power supply coordination and double wires and power supply parallel connection. The main flow direction of the power supply parallel connection technology is two, namely the power supply internal parallel connection and the power supply inter-power supply parallel connection.
The power supply internal parallel connection technology is to realize the purpose of high-power output of one device through parallel connection of power devices. The parallel connection between power supplies means that two or more independent power supplies realize high-power output through parallel connection and coordination technology between the power supplies, but because of the control problem related to welding waveforms, the difficulty of parallel connection between the power supplies is coordination output between different power supplies, and the total current and voltage waveforms output by the power supplies cannot be ensured to meet the waveform control requirement of welding.
Disclosure of Invention
The invention aims to provide a consumable electrode welding multi-power supply parallel device with multi-power supply coordinated output and a use method thereof.
In order to achieve the above object, an embodiment of the present invention provides a consumable electrode welding multi-power supply parallel device, including:
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 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;
The slave welding power supply and the slave controller are connected in series to form a group of parallel branches, and each group of parallel branches is connected in parallel to two ends of the first parallel branch to grade the parallel branches according to the connection sequence;
The main controller is used for receiving the current output requirement of the parallel circuit, controlling the current waveform output by the main welding power supply according to the current output requirement of the parallel circuit, distributing current according to the current output requirement of the parallel circuit, controlling the current value output by the main welding power supply according to the distribution result, and sending the current output requirement to the slave controller in the next-stage parallel branch according to the distribution result;
The slave controllers are used for receiving current output requirements sent by the master controller in the first parallel branch or the slave controllers in the upper parallel branch, distributing current according to the received current output requirements, controlling current values output from the welding power supply according to distribution results, and sending the current output requirements to the slave controllers in the lower parallel branch according to distribution results.
Wherein, between the master controller and the slave controller, and the slave controller are communicated through an IO carrier communication mode.
In a specific embodiment, the main controller is specifically configured to control the current waveforms output by the main welding power supply 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.
In particular, the main controller is configured to perform current distribution according to a parallel circuit current output requirement and an output load of the main welding power supply, and determine an output current value of the main welding power supply.
In a specific embodiment, the slave controller is specifically configured to perform current distribution according to the received current output requirement and the output load of the slave welding power supply, and determine an output current value of the slave welding power supply connected in series with the slave controller.
The embodiment of the invention also provides a use method of the consumable electrode welding multi-power supply parallel device, which is used for ensuring the coordinated output of multiple power supplies and comprises the following steps:
The main controller receives the current output requirement of the parallel circuit;
the main controller controls the current waveform output by the main welding power supply according to the current output requirement of the parallel circuit;
The main controller controls the current value output by the main welding power supply according to the distribution result, and sends the current output requirement to the slave controller in the next parallel branch according to the distribution result;
The method comprises the steps of receiving a current output requirement sent by a main controller in a first parallel branch by a slave controller in a next parallel branch of the first parallel branch, distributing current according to the received current output requirement, controlling a current value output from a welding power supply connected with the slave controller in series according to a distribution result, and sending the current output requirement to the slave controller in the parallel branch of the next stage according to the distribution result;
The method comprises the steps of starting from a parallel branch of a next stage of the first parallel branch, receiving a current output requirement sent by a slave controller in the parallel branch of the previous stage from the slave controller in the parallel branch of each stage, distributing current according to the received current output requirement, controlling a current value output from a welding power supply in the parallel branch according to a distribution result, and sending the current output requirement to the slave controller in the parallel branch of the next stage according to the distribution result;
And after receiving the current output requirement from the controller in the parallel branch of the last stage, carrying out current distribution according to the received current output requirement, and controlling the current value output from the welding power supply in the parallel branch of the last stage according to the distribution result.
In a specific embodiment, current distribution is performed according to a current output requirement of a parallel circuit, including:
The main controller distributes 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 carried out according to the received current output requirement, and the current value output from the welding power supply in the parallel branch is controlled according to the distribution result, and the current distribution method comprises the following steps:
the slave controller distributes current according to the received current output requirement and the output load of the slave welding power supply in the parallel branch, and determines the output current value of the slave welding power supply in the parallel branch.
In specific implementation, sending a current output requirement to a slave controller in a next-stage parallel branch according to a distribution result includes:
According to the distribution result, the master controller utilizes IO carrier communication technology to send current output requirements to the slave controllers in the next-stage parallel branch;
sending a current output demand to a slave controller in a parallel branch of a next stage according to the allocation result, comprising:
according to the distribution result, the slave controller sends the current output requirement to the slave controller in the parallel branch of the next stage by using the IO carrier communication technology.
In a specific embodiment, the main controller controls the current waveform output by the main welding power supply according to the current output requirement of the parallel circuit, and the method comprises the following steps:
And the main controller controls the current waveform output by the main welding power supply according to the current output requirement of the parallel circuit, so that the current waveforms output by all the parallel branches meet the welding current waveform requirement.
The embodiment of the invention comprises a main welding power supply, a main controller, at least one auxiliary welding power supply and at least one auxiliary controller, wherein the main welding power supply and the main controller are connected in series to form a first parallel branch and are constant voltage sources, the auxiliary welding power supply and the auxiliary controller are connected in series to form a group of parallel branches, each group of parallel branches are connected in parallel to two ends of the first parallel branch, the parallel branches are classified according to the connection sequence, the auxiliary welding power supply is a constant current source, the main controller is arranged to receive current output requirements of a parallel circuit, current waveforms output by the main welding power supply are controlled according to the current output requirements of the parallel circuit, current distribution is carried out according to the current output requirements of the parallel circuit, current values output by the main welding power supply are controlled according to the current output requirements of the parallel circuit, current output requirements are controlled according to the distribution results, current output requirements are sent to the auxiliary controller in the next parallel branch according to the distribution results, the current output requirements sent by the main controller in the first parallel branch or the current output requirements sent by the auxiliary controller in the previous parallel branch are set, current distribution is carried out according to the received current output requirements sent by the auxiliary controller in the first parallel branch, current output requirements are controlled according to the distribution results, and the current output requirements output from the auxiliary welding power supply are sent to the next parallel branch. The main controller is arranged to control the output current waveform, so that the waveform output after the parallel connection of a plurality of power supplies meets the requirement, and each parallel branch can only send the current output requirement to the parallel branch of the next stage, namely the unidirectional current distribution of the parallel branch of the stage ensures the accurate and mutually noninterfere current distribution, thereby ensuring the coordinated output of the multiple power supplies.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:
FIG. 1 is a schematic diagram of a consumable electrode welding multi-power supply parallel arrangement according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an implementation process of a method for using a consumable electrode welding multi-power supply parallel device according to an embodiment of the present invention.
Detailed Description
The application is further described in detail below by means of the figures and examples. The features and advantages of the present application will become more apparent from the description.
The word "exemplary" is used 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 illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not collide with each other.
The embodiment of the invention provides a consumable electrode welding multi-power supply parallel device, which is used for ensuring the coordinated output of multiple power supplies when the consumable electrode welding multi-power supplies are connected in parallel, and the circuit connection relation diagram of the device is shown in fig. 1, and comprises the following components:
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;
the main welding power supply 101 and the main controller 102 are connected in series to form a first parallel branch, and the main welding power supply 101 is a constant voltage source;
a slave welding power supply 201 and a slave controller 202 are connected in series to form a group of parallel branches, and each group of parallel branches is connected in parallel to two ends of the first parallel branch, and the parallel branches are classified according to the connection sequence;
the main controller 102 is used for receiving the parallel circuit current output requirement, controlling the current waveform output by the main welding power supply 101 according to the parallel circuit current output requirement, carrying out current distribution according to the parallel circuit current output requirement, and controlling the current value output by the main welding power supply 101 according to the distribution result;
The slave controller 202 is configured to receive a current output requirement from the master controller 102 in the first parallel branch or a current output requirement from the slave controller 202 in the previous parallel branch, perform current distribution according to the received current output requirement, control a current value output from the welding power supply 201 according to a distribution result, and send the current output requirement to the slave controller 202 in the next parallel branch according to the distribution result.
In the embodiment, a main welding power supply 101, a main controller 102, at least one auxiliary welding power supply 201 and at least one auxiliary controller 202 are arranged, the main welding power supply 101 and the main controller 102 are connected in series to form a first parallel branch, the main welding power supply 101 is a constant voltage source, one auxiliary welding power supply 201 and one auxiliary controller 202 are connected in series to form a group of parallel branches, each group of parallel branches is connected in parallel to two ends of the first parallel branch, the parallel branches are classified according to a connecting sequence, the auxiliary welding power supply 201 is a constant current source, the main controller 102 is arranged to receive parallel circuit current output requirements, current waveforms output by the main welding power supply 101 are controlled according to the parallel circuit current output requirements, current distribution is carried out according to the parallel circuit current output requirements, current values output by the main welding power supply 101 are controlled according to the parallel circuit current output requirements, current output requirements are sent to the auxiliary controllers 202 in the next parallel branch according to the distribution results, the current output requirements sent by the main controller 102 in the first parallel branch or the auxiliary controllers 202 in the previous parallel branch are arranged, current output requirements sent by the auxiliary controllers 202 in the parallel branch are distributed according to the received current output requirements of the first parallel branch, and the current output requirements sent by the auxiliary controllers 201 are controlled according to the distribution results of the current output requirements of the current output from the parallel branches to the current distribution results to the current output control output demands. The main controller 102 is arranged to control the output current waveform, so that the waveform output after the parallel connection of a plurality of power supplies meets the requirement, and each parallel branch can only send the current output requirement to the parallel branch of the next stage, namely the unidirectional current distribution of the parallel branch of the stage ensures the accurate and mutually noninterfere current distribution, thereby ensuring the coordinated output of the plurality of power supplies.
The current output requirement of the parallel circuit refers to some requirements of welding current which is required to be output by the consumable electrode welding multi-power supply parallel device during welding, and the requirements include the current magnitude, the current waveform and the like.
The main welding power source 101 is a constant voltage source, i.e. adopts the output characteristic of macroscopic constant voltage, and the auxiliary welding power source 201 is a constant current source, i.e. adopts the output characteristic of constant current, and can be stable single current output or pulse current output. And the main welding power supply 101 and the auxiliary welding power supply 201 are independent welding power supplies, each power supply can be used for independent welding, and higher-power welding can be realized through a parallel scheme. For example, if 3 power supplies are connected in parallel, the output load duration of each power supply is 400a,100%, and then each power supply can independently output 400a,100%, and load output of 1200a,100% can also be achieved through the parallel scheme provided by the embodiment of the invention.
As shown in fig. 1, the master welding power source 101 is connected in unidirectional serial with each slave welding power source 201, and the parallel branch hierarchy in which each slave welding power source 201 is located may be determined according to the connection order of the slave welding power sources 201 in the serial connection, for example, from 1 level, 2 level, and.
The main controller 102 is configured to receive a parallel circuit current output requirement, and control a current waveform output by the main welding power supply 101 according to the parallel circuit current output requirement, and in a specific embodiment, the main controller 102 is specifically configured to control the current waveform output by the main welding power supply 101 according to the parallel circuit current output requirement, so that the current waveforms output by all parallel branches conform to the welding current waveform requirement, 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 in an oscilloscope is consistent with the current waveform required by welding.
The main controller 102 is configured to perform current distribution according to the parallel circuit current output requirement, and control a current value output by the main welding power supply 101 according to a distribution result, and in a specific embodiment, the main controller 102 is specifically configured to perform current distribution according to the parallel circuit current output requirement and an output load of the main welding power supply 101, and determine an output current value of the main welding power supply 101. For example, the parallel circuit current output demand is 1200A, the output load of the main welding power source 101 is 400A, the main controller 102 compares the two values, the current value allocated to the output of the main welding power source 101 is less than or equal to 400A, and determines the current output demand to be sent to the slave controller 202 in the next parallel branch. For example, if the master controller 102 controls the output 350A of the master welding power source 101, the current output requirement is 850A sent to the slave controller 202 in the next parallel branch, and those skilled in the art will understand that this example is only an example, and the protection scope of the embodiments of the present invention is not limited in this way.
Accordingly, the slave controller 202 is specifically configured to perform current distribution according to the received current output requirement and the output load of the slave welding power supply 201, determine an output current value of the slave welding power supply 201 connected in series with the slave controller 202, for example, the slave controller 202 in the 1-stage parallel branch in fig. 1 receives the current output requirement of 850A, and the output load of the slave welding power supply 201 is only the maximum output 300A, the slave controller 202 compares the current output requirement of 850A with the output load of the maximum output 300A, performs current distribution, controls the output 300A of the slave welding power supply 201 in the 1-stage parallel branch, and sends the current output requirement to the slave controller 202 in the 2-stage parallel branch as 550A. The parallel branches of the first stage sequentially distribute current and send current output demands to the next stage until the last parallel branch, so that unidirectional connection between the main welding power supply 101 and the lower slave welding power supply 201 is realized, unidirectional connection between the upper slave welding power supply 201 and the lower slave welding power supply 201 is realized, and unidirectional current distribution from top to bottom is realized.
To satisfy the real-time performance, communication is performed between the master controller 102 and the slave controller 202, and between the slave controller 202 and the slave controller 202 by an IO carrier communication method. That is, the master controller 102 sends a current output requirement to the slave controller 202, the slave controller 202 receives a current output requirement sent by the master controller 102, the slave controller 202 sends a current output requirement to the slave controller 202 in the next parallel branch, and the slave controller 202 receives a current output requirement sent by the slave controller 202 in the previous parallel branch, all implemented by using the IO carrier communication technology. Specifically, carrier communication (carrier communication) is a telephone multipath communication system based on a frequency division multiplexing technology, belongs to a classical analog communication system, and IO carrier communication refers to a technology for realizing real-time communication between communication devices by utilizing a carrier communication technology through an IO interface.
Based on the same inventive concept, the embodiment of the invention also provides a method for using the consumable electrode welding multi-power supply parallel device, the principle of solving the problem is similar to that of the consumable electrode welding multi-power supply parallel device, and the repetition is omitted, and the specific process, as shown in fig. 2, comprises the following steps:
step S1, a main controller 102 receives a parallel circuit current output requirement;
step S2, the main controller 102 controls the current waveform output by the main welding power supply 101 according to the current output requirement of the parallel circuit;
step S3, the main controller 102 performs current distribution according to the current output requirement of the parallel circuit, the main controller 102 controls the current value output by the main welding power supply 101 according to the distribution result, and sends the current output requirement to the slave controller 202 in the next parallel branch according to the distribution result;
Step S4, receiving a current output requirement sent by the master controller 102 in the first parallel branch from the slave controller 202 in the next parallel branch of the first parallel branch, distributing current according to the received current output requirement, controlling a current value output from the welding power supply 201 in series with the slave controller 202 according to a distribution result, and sending the current output requirement to the slave controller 202 in the parallel branch of the next parallel branch according to the distribution result;
step S5, starting from the parallel branch of the first parallel branch and the parallel branch of the next stage, the slave controller 202 in the parallel branch of each stage receives the current output requirement sent by the slave controller 202 in the parallel branch of the previous stage;
and S6, after receiving the current output requirement from the controller 202 in the parallel branch of the last stage, carrying out current distribution according to the received current output requirement, and controlling the current value output from the welding power supply 201 in the parallel branch of the last stage according to the distribution result.
In step 202, the main controller 102 controls the current waveforms 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.
In a specific embodiment, in step S3, the main controller 102 performs current distribution according to the parallel circuit current output requirement, including that the main controller 102 performs current distribution according to the parallel circuit current output requirement and the output load of the main welding power supply 101, and determines the output current value of the main welding power supply 101. Accordingly, in step S4, current distribution is performed according to the received current output requirement, including that the slave controller 202 in the next parallel branch of the first parallel branch performs current distribution according to the received current output requirement and the output load of the slave welding power supply 201 connected with the slave controller, 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 requirement, and the current value output from the welding power supply 201 in the parallel branch is controlled according to the distribution result, including that the slave controller 202 performs current distribution according to the received current output requirement and the output load from the welding power supply 201 in the parallel branch, and determines the output current value from the welding power supply 201 in the parallel branch.
In order to meet the real-time requirement, in the step S3, the sending of the current output requirement to the slave controller 202 in the next parallel branch according to the allocation result includes that the master controller 102 sends the current output requirement to the slave controller 202 in the next parallel branch by using the IO carrier communication technology according to the allocation result. In step S4, receiving the current output requirement from the master controller 102 in the first parallel leg includes the slave controller 202 receiving the current output requirement from the master controller 102 in the first parallel leg using the IO carrier communication technology. Sending the current output demand to the slave controller 202 in the parallel leg of the further stage according to the allocation result includes sending the current output demand to the slave controller 202 in the parallel leg of the further stage according to the allocation result using the IO carrier communication technology from the controller 202. In step S5, receiving the current output requirement from the controller 202 in the parallel branch of the previous stage includes receiving the current output requirement from the controller 202 in the parallel branch of the previous stage by using the IO carrier communication technology from the controller 202. Sending the current output demand to the slave controller 202 in the parallel leg of the next stage according to the allocation result includes the slave controller 202 sending the current output demand to the slave controller 202 in the parallel leg of the next stage using the IO carrier communication technology according to the allocation result. In step S6, receiving the current output demand from the controller 202 includes receiving the current output demand from the controller 202 using IO carrier communication technology.
By the above-described use method, a top-down current distribution manner is realized, that is, the main welding power supply 101 distributes the current value output from the welding power supply 201 to 1 level according to the current distribution rule, distributes the current value output from the welding power supply 201 to 2 levels from the welding power supply 201 to 1 level, and so on. For example, the welding current of output 1200A needs to be set, the main welding power supply 101 only retains 400A output capacity according to its own output capacity, and the primary current is distributed to 1-level slave welding power supply 201800A, and so on, note that the distribution manner described in this example is only an example and does not represent an actual current distribution rule. In this way, unidirectional current distribution is achieved, i.e., the primary welding power source 101 is able to distribute current to the 1-stage secondary welding power source 201 via primary current distribution, but the 1-stage secondary welding power source 201 is unable to distribute current to the primary welding power source 101, and is able to distribute current to only the 2-stage secondary welding power source 201.
In summary, the consumable electrode welding multi-power supply parallel device and the application method provided by the embodiment have the following advantages:
The current waveform output by the main controller is controlled to enable the waveform output by the parallel connection of the plurality of power supplies to meet the requirement, the current output requirement can only be sent to the parallel connection branch of the next stage through each parallel connection branch, the unidirectional current distribution of the parallel connection branch of the first stage is realized, the accurate and mutually noninterfered current distribution is ensured, the coordinated output of the plurality of power supplies is ensured, the real-time performance of information transmission is realized by applying the IO carrier communication technology, and the real-time performance of the current required by welding is realized by the fusion electrode welding multi-power supply parallel connection device.
Although the invention provides method operational steps as described in the examples or flowcharts, more or fewer operational steps may be included based on conventional or non-inventive labor. The order of steps recited in the embodiments is merely one way of performing the order of steps and does not represent a unique order of execution. When implemented by an actual device or client product, the instructions may be executed sequentially or in parallel (e.g., in a parallel processor or multi-threaded processing environment) as shown in the embodiments or figures.
It will be appreciated by those skilled in the art that embodiments of the present description may be provided as a method, apparatus (system) or computer program product. Accordingly, the present specification embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments. In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
It should be noted that, without conflict, the embodiments of the present invention and features of 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 permutation of these aspects and/or embodiments. Moreover, each aspect and/or embodiment of the invention may be used alone or in combination with one or more other aspects and/or embodiments.
It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit the technical solution of the present invention, and although the detailed description of the present invention is given with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention, and all the modifications or substitutions are included in the scope of the claims and the specification of the present invention.
Claims (9)
1. A consumable electrode welding multi-power supply parallel arrangement comprising:
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 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;
The slave welding power supply and the slave controller are connected in series to form a group of parallel branches, and each group of parallel branches is connected in parallel to two ends of the first parallel branch, so that all parallel branches formed by the slave welding power supply and the slave controller are classified according to the connection sequence;
The main controller is used for receiving the current output requirement of the parallel circuit, controlling the current waveform output by the main welding power supply according to the current output requirement of the parallel circuit, distributing current according to the current output requirement of the parallel circuit, controlling the current value output by the main welding power supply according to the distribution result, and sending the current output requirement to the slave controller in the next-stage parallel branch according to the distribution result;
The slave controllers are used for receiving current output requirements sent by the master controller in the first parallel branch or current output requirements sent by the slave controllers in the upper parallel branch, distributing current according to the received current output requirements, controlling current values output from the welding power supply according to distribution results, and sending the current output requirements to the slave controllers in the lower parallel branch according to distribution results;
The slave controller is used for receiving the current output requirement sent by the master controller in the first parallel branch or the current output requirement sent by the slave controller in the upper parallel branch, distributing current according to the received current output requirement, controlling the current value output from the welding power supply according to the distribution result, and sending the current output requirement to the slave controller in the lower parallel branch according to the distribution result, wherein the current output requirement comprises the following steps:
The method comprises the steps of receiving a current output requirement sent by a main controller in a first parallel branch by a slave controller in a next parallel branch of the first parallel branch, distributing current according to the received current output requirement, controlling a current value output from a welding power supply connected with the slave controller in series according to a distribution result, and sending the current output requirement to the slave controller in the parallel branch of the next stage according to the distribution result;
The method comprises the steps of starting from a parallel branch of a next stage of the first parallel branch, receiving a current output requirement sent by a slave controller in the parallel branch of the previous stage from the slave controller in the parallel branch of each stage, distributing current according to the received current output requirement, controlling a current value output from a welding power supply in the parallel branch according to a distribution result, and sending the current output requirement to the slave controller in the parallel branch of the next stage according to the distribution result;
And after receiving the current output requirement from the controller in the parallel branch of the last stage, carrying out current distribution according to the received current output requirement, and controlling the current value output from the welding power supply in the parallel branch of the last stage according to the distribution result.
2. The consumable electrode welding multi-power supply parallel arrangement of claim 1 wherein communication is via IO carrier communication between the master controller and the slave controller and between the slave controller and the slave controller.
3. The consumable electrode welding multi-power supply parallel arrangement of claim 1 wherein the master controller is configured to control the current waveforms output by the master welding power supply based on parallel circuit current output requirements such that the current waveforms output by all parallel branches meet the welding current waveform requirements.
4. The consumable electrode welding multi-power supply parallel arrangement of claim 1 wherein the master controller is configured to determine an output current value of the main welding power supply based on current sharing of the parallel circuit current output demand and an output load of the main welding power supply.
5. The consumable electrode welding multi-power supply parallel arrangement of claim 1 wherein the slave controller is operable to determine an output current value of the slave welding power supply in series with the slave controller based upon current sharing of the received current output demand and an output load of the slave welding power supply.
6. A method of using the consumable electrode welding multi-power supply parallel device of any one of claims 1-5, comprising:
The main controller receives the current output requirement of the parallel circuit;
the main controller controls the current waveform output by the main welding power supply according to the current output requirement of the parallel circuit;
The main controller controls the current value output by the main welding power supply according to the distribution result, and sends the current output requirement to the slave controller in the next parallel branch according to the distribution result;
The method comprises the steps of receiving a current output requirement sent by a main controller in a first parallel branch by a slave controller in a next parallel branch of the first parallel branch, distributing current according to the received current output requirement, controlling a current value output from a welding power supply connected with the slave controller in series according to a distribution result, and sending the current output requirement to the slave controller in the parallel branch of the next stage according to the distribution result;
The method comprises the steps of starting from a parallel branch of a next stage of the first parallel branch, receiving a current output requirement sent by a slave controller in the parallel branch of the previous stage from the slave controller in the parallel branch of each stage, distributing current according to the received current output requirement, controlling a current value output from a welding power supply in the parallel branch according to a distribution result, and sending the current output requirement to the slave controller in the parallel branch of the next stage according to the distribution result;
And after receiving the current output requirement from the controller in the parallel branch of the last stage, carrying out current distribution according to the received current output requirement, and controlling the current value output from the welding power supply in the parallel branch of the last stage according to the distribution result.
7. The method of claim 6, wherein the current distribution is performed according to the current output requirement of the parallel circuit, and the method comprises:
The main controller distributes 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 carried out according to the received current output requirement, and the current value output from the welding power supply in the parallel branch is controlled according to the distribution result, and the current distribution method comprises the following steps:
the slave controller distributes current according to the received current output requirement and the output load of the slave welding power supply in the parallel branch, and determines the output current value of the slave welding power supply in the parallel branch.
8. The method of claim 6, wherein sending a current output demand to the slave controller in the next parallel branch based on the distribution result, comprising:
According to the distribution result, the master controller utilizes IO carrier communication technology to send current output requirements to the slave controllers in the next-stage parallel branch;
sending a current output demand to a slave controller in a parallel branch of a next stage according to the allocation result, comprising:
according to the distribution result, the slave controller sends the current output requirement to the slave controller in the parallel branch of the next stage by using the IO carrier communication technology.
9. The method of claim 6, wherein the main controller controls the current waveform of the main welding power source output according to the parallel circuit current output requirement, comprising:
And the main controller controls the current waveform output by the main welding power supply according to the current output requirement of the parallel circuit, so that the current waveforms output by all the parallel branches meet the welding current waveform requirement.
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| DE10015917A1 (en) * | 2000-03-30 | 2001-10-04 | Bosch Gmbh Robert | Method and device for regulating the parallel operation of DC-DC converters |
| CN102541233A (en) * | 2010-12-29 | 2012-07-04 | 鸿富锦精密工业（深圳）有限公司 | Server power supply system |
| CN108923520B (en) * | 2018-07-13 | 2021-07-13 | 哈尔滨工程大学 | An integrated photovoltaic power supply that can realize independent load distribution in series and parallel operation |
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