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交流电焊机是一种最常用的低压电气设备,在建筑、冶金、机械制造等行业应用最为广泛。它主要的特点是工作时间间断频繁,空载运行时间长。一般焊接特别是高空作业时,电焊机引线长,操作点远离电源,要想在电焊机空载时断开电源很难做到,浪费大量电能。交流电焊机空载时,有功损耗约为额定容量的1％～2.5％,无功损耗约为额定容量的8％～9％,空载功率因数约为0.1～0.3。因此,可以针对电焊机的工作特点,对电焊机电路作适当改进,减少空载损耗,提高平均功
AC welding machine is one of the most commonly used low-voltage electrical equipment, the most widely used in construction, metallurgy, machinery manufacturing and other industries. Its main feature is the frequent interruption of working hours, no-load running time. General welding, especially at high altitude, the welding lead wire length, the operating point away from the power, in the absence of welding power to disconnect the power supply is difficult to do, a lot of waste of energy. AC welder at no-load, the active loss of about 1% of rated capacity of 2.5%, reactive power loss of about 8% to 9% of rated capacity, no-load power factor of about 0.1 to 0.3. Therefore, the welding machine can work for the characteristics of the welding circuit to make appropriate improvements to reduce the load loss and improve the average work