Multi-power parallel-combination welding power supply
A welding power supply and multi-power supply technology, which is applied in the direction of emergency power supply arrangement, electrical components, circuit devices, etc., can solve the problems of unbalanced current output, unbalanced current, and low debugging difficulty of parallel welding power supplies, so as to improve reliability and stability performance, avoid current imbalance, and protect reliability
Inactive Publication Date: 2013-01-30
成都康瑞特科技开发有限责任公司
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Problems solved by technology
[0005] In order to overcome the shortcomings of unbalanced current output of parallel welding power supplies in the prior art, the task of the present invention is to propose a simple structure principle, independent parallel power supply current control, constant total output current, and allowing each power supply to output unbalanced current , the work is very stable and reliable, and the debugging difficulty is small, especially suitable for multiple parallel welding power supply systems in mass production
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[0015] refer to figure 1 with figure 2 . The basic power supply consists of an inverter and a drive with current limiting control. The multi-parallel combined welding power supply of the present invention is a parallel combined welding power supply system composed of at least two drive boxes with current limiting control and independent inverter power supply. In the welding power supply system composed of at least two sets of power supplies in parallel, there is a circuit that drives each parallel inverter power supply group through the output terminal of the welding current control board. After output to the welding port, the first current closed-loop control loop that keeps the total output current of the superimposed parallel power supply group constant, that is, the B loop; and in each parallel inverter power group, each inverter power supply is connected to a The driver with current limiting protection constitutes a mutually independent second power supply current cl...
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The invention discloses a multi-power parallel-combination welding power supply, aiming at providing a welding power supply which has simple structure principle, independently controls the current of parallel power supplies, keeps the total output current constant, allows each power supply to output non-equalizing current and is stable and reliable in work. The multi-power parallel-combination welding power supply comprises a parallel-combination welding power supply formed by at least two independent inverted power supplies; the welding power supply formed by parallel combination of at least two groups of power supplies is provided with a first current closed-loop control circuit (circuit B), in the first current closed-loop control circuit (circuit B), each parallel inverted power supply group is driven by the output end of a welding current control board, the output ends of all the parallel inverted power supply are connected in parallel and then output to a welding port through a current divider, and the first current closed-loop (circuit B) is used for making the total output current of the parallel power supply group be constant after superposition; and in addition, the parallel inverted power supply groups are respectively connected to a driver with current-limiting protection to form second power current closed-loop control circuits (circuits A) which are mutually independent. The invention solves the problems of power tube rupture accidents and power supply damage which are frequently caused by current unbalance in the prior art.
Description
technical field [0001] The invention relates to a power supply equipment used in manual welding, gas shielded welding, submerged arc welding, electroslag welding, plasma welding and plasma cutting. technical background [0002] In the prior art, a welding power supply for automatic or manual welding equipment is usually a single power supply composed of a three-phase rectifier bridge group, a filter circuit, an inverter switch circuit, a control circuit, a drive circuit, and a secondary rectification circuit. Generally, the welding power source composed of a single type of power source cannot meet the requirements of the required current because it cannot meet the welding environment that requires a larger welding current, especially the welding of large-scale equipment. For example, Beijing Times, Shandong Aotai, Shenzhen Jasic, and Sweden’s ESAB have adopted such image 3 Shown is only two such power sources connected in parallel to form a dual-parallel power source weldin...
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IPC IPC(8): H02J9/00H02M1/32
Inventor 殷宇邹静
Owner 成都康瑞特科技开发有限责任公司