誘導溶解炉用サイリスタの選定と設置に関する注意事項

中間周波数電源は誘導溶解炉の重要な部分であり、サイリスタは中間周波数電源の心臓部です。 その正しい使用は、機器の操作に不可欠です。 サイリスタの動作電流は数千アンペアで、電圧は通常XNUMXボルトを超えています。 中間周波数電源のメインコントロールボードの適切な保護と適切な水冷条件が必要です。 したがって、誘導溶解炉のSCRの選択と設置に関する注意事項は次のとおりです。

Overload characteristics of thyristor: The damage of thyristor is called breakdown. Under normal water-cooling conditions, the current overload capacity can reach more than 110%, and the SCR is definitely damaged under overpressure. Considering the surge voltage, manufacturers often choose SCR components based on 4 times the operating voltage when manufacturing equipment. For example, when the rated working voltage of the intermediate frequency power supply cabinet is 1750V, two silicon components with a withstand voltage of 2500V are selected to work in series, which is equivalent to a withstand voltage of 5000V.

The correct installation pressure of SCR: 150-200KG/cm2. When the equipment leaves the factory, it is generally press-fitted with a hydraulic press. Manual use of ordinary wrenches can not reach this value with the maximum strength, so there is no need to worry about the thyristor being crushed when manually loading the pressure; if the pressure is loose, it will burn through the thyristor due to poor heat dissipation.