Research on energy-efficient AC arc welder
Xu Li · Electric Welding Machine · 2009
AC arc welder is a high power-consuming equipment.As a result of the high no-load voltage and low operating voltage based on arc welding process,the value of Power Factor is usually a bit lower,which is only about 0.4～0.5,and reactive power may surpass active power,this can result in lower power utilization,causing larger waste of power.In this thesis,achieving the purpose that no-load output voltage has been increased,through the use of the simple L-C resonant circuit,then,the value of Power Factor has been also increased,and this circuit can reduce the input capacity of AC arc welder,in order to the saving of energy.If Power Factor of arc welder increases 0.1～0.2,input capacity may decrease 15%～30%,thus,hundreds of thousands of KVA possibly arc economized by hundreds of thousands of nationwide machine,and this is equivalent to the capacity of a larger-scale power station.