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无芯工频感应是个单相电感性负载,输入功率较大,而它的功率因数很低,往往破坏电网的三相对称,影响其他负荷的运行,因此,在电炉应用中要设置三相功率平衡装置。三相平衡装置由一个平衡电抗器、一组电容器和感应电炉连接成三角形负载形式。由于工频感应加热主要建立在电磁效应、表面效应、邻近效应、圆环效应和导磁体驱流作用等物理原理上。同时,在感应加热过程中,金属的物理性能是不断变化的(如炉料
Coreless power frequency induction is a single-phase inductive load, the input power is large, and its low power factor, often undermining the three-phase symmetry of the power grid, affecting the operation of other loads, therefore, the application of electric furnace to set the three-phase power Balance device. Three-phase balancing device consists of a balanced reactor, a capacitor and induction furnace connected into a triangular load form. As the frequency induction heating is mainly based on the physical principles of electromagnetic effect, surface effect, proximity effect, toroidal effect and magnetizing body flooding. At the same time, the physical properties of metals are constantly changing during induction heating (eg charge