... (for 15kW, 220V),50/60HZ Frequency:30KHz~80KHz Induction Soldering Machine: Input power:15~45kW max., adjustable; 32~ ... IGBT frequency regulation, soft switch dual –resonance control and frequency automatic tracking technology Energy efficient, higher power factor ... voltage or constant current/constant power Frequency , power., voltage and current full display , adjustable heating , holding time(0.1s ...