变频电源自动阻抗调节在铝镁等有色金属棒料梯度加热和感应熔炼中的应用

Application of Automatic Impedance Adjustment of Variable Frequency Power Supply in Gradient Heating and Induction Melting of Non-Ferrous Metal Bars Such as Aluminum and Magnesium

针对铝镁等有色金属材料,变频梯度加热和感应熔炼是两种重要的热加工手段。在加热过程中,对整个系统工作效率影响较大的因素,是加热过程中材料温度改变时,材料电性能改变引起的系统阻抗变化对加热效率的影响。为了应对金属材料的这种固有特性对加热设备效率的不良影响,西安威特电力电子设备研究所技术人员设计出具有自动阻抗调节功能的智能化变频电源控制系统。该智能化控制系统可根据加热过程中材料温度变化引起的设备系统阻抗变化。通过智能化控制系统的调节功能,实时调节变频电源输出参数,在整个加热或熔炼过程中使设备一直处于高效率工作状态。

Frequency conversion gradient heating and induction melting are two important thermal processing methods for non-ferrous metal materials such as aluminum and magnesium.In the heating process,the factor that has a great influence on the working efficiency of the whole system is the influence of the change of system impedance caused by the change of material electrical properties on the heating efficiency when the material temperature changes in the heating process.In order to deal with the adverse effects of the inherent characteristics of metal materials on the efficiency of heating equipment,technicians of Xi'an Weite Institute of Power Electronic Equipment designed an intelligent variable frequency power supply control system with automatic impedance adjustment function.The intelligent control system can change the impedance of equipment system caused by the change of material temperature during heating.Through the adjustment function of the intelligent control system,the output parameters of the variable frequency power supply are adjusted in real time,so that the equipment is always in a high-efficiency working state during the whole heating or smelting process.