inverter welding machine consists of inverter power supply and external equipment. The inverter power supply is the core of the equipment, and its working process is as follows:
Power frequency AC-DC-high frequency AC-transformer-DC is to rectify and filter three-phase or single-phase 50Hz power frequency alternating current to obtain relatively smooth direct current. The direct current becomes the alternating current of 15~100kHz. After the intermediate frequency main transformer is stepped down, it is rectified and filtered again to obtain a stable DC output welding current (or the inverter outputs AC power of the required frequency again).
The control circuit of the inverter consists of a given circuit and a drive circuit. By processing the feedback of the voltage and current signals, the whole machine is cyclically controlled, and the pulse width modulation PWM is used as the core control technology to obtain fast pulse width modulation. Constant current characteristics and excellent welding and cutting process results.
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What are the characteristics of inverter welding machine