Large-current direct-current switch for surface treatment production line

Abstract

The invention discloses a high-current direct-current switch for a surface treatment production line, which comprises an anode heat dissipation confluence copper plate, an aluminum radiator, a PCB (Printed Circuit Board), a cathode confluence copper plate, a cathode confluence copper plate mounting piece and a high-power packaging MOS (Metal Oxide Semiconductor) tube, the PCB is connected with the negative electrode confluence copper plate through the negative electrode copper sheet installation piece, the positive electrode heat dissipation confluence copper plate is arranged on the other side of the high-power packaging MOS tube, and the aluminum radiator is fixedly installed on the other side face, opposite to the high-power packaging MOS tube, of the positive electrode heat dissipation confluence copper plate. The invention has the beneficial effects that a large-current switch control effect is realized by connecting a plurality of high-power MOS tubes in parallel, and meanwhile, the drain heat dissipation surfaces of the MOS tubes are tightly combined with the positive heat dissipation confluence copper plate through a low-temperature tin soldering process, so that the thermal resistance value and the resistance value at a welding and attaching part are reduced; therefore, the large-current direct-current switch has the advantages of accurate control on the conduction time and longer switch service life.

Description

technical field [0001] The invention relates to the field of surface treatment production line devices, in particular to a high-current DC switch for surface treatment production lines. Background technique [0002] Surface treatment is a process of artificially forming a surface layer with different mechanical, physical and chemical properties of the substrate on the surface of the substrate. The purpose of surface treatment is to meet the corrosion resistance, wear resistance, decoration or other special functional requirements of the product. For metal and non-metal devices, surface treatment mainly includes electroplating, electrophoresis, anode treatment, chemical treatment, spraying, etc. In the surface treatment production line involving electroplating, electrophoresis, etc., it is necessary to precisely control the time parameters of the high-current DC power supply to meet the process requirements, while the traditional switch is under the condition of high current...

AI Technical Summary

Problems solved by technology

In production lines involving surface treatment such as electroplating and electrophoresis, it is necessary to precisely control the time parameters of the high-current DC power supply to meet the process requirements. However, under the high-current working conditions of the traditional switch, the control accuracy of the switch on-time and the switch life are both difficult to meet production requirements

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