迄今晶体管电源的输出功率以400kW为最大。为了满足PC钢棒等淬火、熔融和加热等的需要,日本高频热炼公司采用绝缘栅双极晶体管(IGBT),开发了1200kW大功率感应加热用晶体管电源装置。这种装置由于功率大,因而使用时加热时间短,能抑制材料的变形。这种新装置不但价格低、使用 So far the output power of transistor power to 400kW maximum. In order to meet the needs of quenching, melting and heating of PC steel rods, etc., Japan’s high-frequency thermal refining company uses insulated-gate bipolar transistors (IGBTs) to develop a 1200kW high-power transistor power supply device for induction heating. Due to the large power of the device, the heating time is short and the deformation of the material can be suppressed. This new device not only low prices, use