263results about How to "Wide band gap" patented technology

The invention provides a digitized variable-polarity welding power source based on SiC IGBT. The digitized variable-polarity welding power source is characterized in that the digitized variable-polarity welding power source comprises a main circuit and a control circuit. The main circuit comprises a three-phase rectifying filter circuit, an SiC IGBT primary inverter circuit, a high-frequency transformer, an SiC ultrahigh-frequency rectifying filter output circuit, an SiC IGBT secondary inverter circuit and a high-voltage arc stabilizing circuit which are sequentially connected; the control circuit comprises a controller, a control power supply module, a digitizing tablet, an SiC primary inverter driving module and an SiC secondary inverter driving module, wherein the digitizing tablet, theSiC primary inverter driving module and the SiC secondary inverter driving module are in signal connection with the controller; the digitizing tablet, the SiC primary inverter driving module and theSiC secondary inverter driving module are electrically connected with the control power supply module; the SiC primary inverter driving module is further connected with the SiC IGBT primary inverter circuit; and the SiC secondary inverter driving module is further connected with the SiC IGBT secondary inverter circuit. According to the digitized variable-polarity welding power source, an electricarc can be easy to reburn after being extinguished, the size is small, the conversion efficiency is high, and work is reliable and stable.