Uncompensated electricity of insulating tube preheats equipment

The utility model provides an uncompensated electricity of insulating tube preheats equipment, the insulating tube electricity of mainly being applied to among the heat supply pipe network of cities and towns DN1400mm and following pipe diameter preheats installation engineering. Uncompensated electricity of insulating tube preheats equipment includes 380V NULL, three -phase rectifier circuit, high frequency inverter circuit, high frequency rectification filter circuit, direct current output signal, cooling system, central processing system, signal feedback system. The utility model provides a general, the shortcoming such as electromagnetic interference big, power device switching loss is big, volume weight is big of traditional high -power high frequency switching power supply technology's efficiency, practiced thrift the energy, reduced the production cost. 本实用新型提供种保温管无补偿电预热设备，主要应用于城镇供热管网中DN1400mm及以下管径的保温管电预热安装工程。所述保温管无补偿电预热设备包括380V交流输入、三相整流电路、高频逆变电路、高频整流滤波电路、直流输出信号、散热系统、中央处理系统、信号反馈系统。本实用新型解决了传统大功率高频开关电源技术