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Model of inverter DC spot welding machine: IST-3000 intermediate frequency inverter DC resistance welding control power supply is composed of single-phase or three-phase alternating current to pulsating direct current through a rectifier circuit, which is converted into 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 direct current with less pulsation and supplied to 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.
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