| Switching power supply has been widely used in people's daily life,industrial production,scientific research and military fields because of its small size,saving raw materials,light weight,closed-loop regulation and other excellent performance.This paper aims to study the parallel3 kA / 60 V switching power supply module,which is used to replace the thyristor controllable rectifier power supply in the vacuum electric arc furnace industry.The vacuum power supply field in the metallurgical industry usually needs more than several thousand amperes.The electric energy change process AC ~ DC ~ AC ~ DC,the transformer design using a side of the series,the secondary side by high frequency rectifier parallel way,the purpose is to first reduce the voltage to a certain level,and then parallel to the output current to meet the design requirements The The research contents include the main circuit topology,high frequency transformer,control system,reasonable switching frequency and perfect protection mechanism and alarm function for frequent short circuit impact load. |
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