Model of inverter DC spot welding machine: IST-2000 IST-3000 IST-5000 medium frequency inverter DC resistance welding control power supply is composed of single-phase or three-phase AC power through a rectifier circuit to pulsating DC power, which is converted into an intermediate frequency square wave through an inverter circuit composed of power switching devices and connected to a transformer. After step-down, it is rectified into DC power with less pulsation to supply electrodes for welding the workpiece. Inverters usually use current feedback pulse width modulation to obtain stable constant current output. The intermediate frequency inverter spot welding machine has superior performance and is suitable for welding thin metal parts with high thermal conductivity and fine workpieces.

The ST-1500 is a stable performance produced by Shenzhen Sester Technology Co., Ltd. and is widely used in DC spot welding machine, AC spot welding machine and welding power supply for automatic welding. The ST-1500 adopts high-performance single-chip microcomputer control, can adjust the welding energy, frequency, welding firm, solder joints beautiful; 7 segment LED display the welding parameters. In addition, the ST-1500 also has automatic monitoring and tracking compensation for power grid voltage, which is simple in operation and reliable in welding. It is widely used in battery, hardware and wire welding, and is favored by the majority of welding machine manufacturers.