钨钼丝炉升温的控制方法

钨、钼材料的电阻温度系数相对较大,低温段电阻值较小,因此由钨、钼材料做发热体的电阻炉在冷态升温过程中,若不采用合适的控制方法极易产生过大的电流而损坏设备。本文分别介绍了手动升温、单温度闭环自动升温和温度、电流双闭环自动升温三种升温控制方法,以及如何有效地防止升温过程中产生过大电流。对于以上三种升温方法,本文分别针对在升温过程中电压、电流、功率等物理量的相互关系进行了分析,讨论了三种方法的控制性能及适应的电炉类型。

Methods to Control the Heating Process in Furnace with W and Mo Wire

Because the temperature coefficients of resistivity of W and Mo are relatively high,if did not taking proper methods to control the over-strong,current will destroy the furnace with W(Mo)heating element during the period of heating from low temperature.In this letter,we introduce three methods to control the heating process namely manual heating,automatic temperature closed loop heating,and temperature-current double closed-loops heating,all of which can prevent the system from over-strong current.During th...