Of arc welding power supply situation and development – power, arc welding – electrical industry
Article by jekky
abstract described the current at home and abroad power supply history current status and future trends and new technologies in recent years the production of power source in the future applications are discussed keywords status development technology modern technology is an important part of their application covering almost all of the welding production of metal as a basic approach has been widely used in various sectors of national economy providing the energy for the power source since its inception has achieved great development 1 source development as a gas conducting physical phenomena arc is found in the early 19th century until 1885 the russians do that seoul dawes invention carbon arc electric arc as a heat source can be applied as a founding the arc is actually used in industry in 1892 after the discovery of metal pole arc 40 39 s of last century the successful welding and aerospace and atomic energy development as there welding 50 39 s of last century with the emergence of a variety of co2 gas shielded and developed plasma to 70 80 years the development of power source is a leap there a variety of types of rectifiers one after another and improve the successful development of various types of pulsed power source in order to further improve the welding quality and meet all position offers excellent welding automation of power source in addition it has successfully developed high efficiency good performance thyristor transistor type fet style and the igbt inverter with the development of new welding technology source also has made substantial progress 2 power source classification characteristics and use of 2 1 classification of power source classification of power source whether domestic or foreign has a different classification methods so the results are not the same this paper adopts the classification of chen chu 2 2 features a variety of power source and use of arc welding transformer which the network voltage alternating current into a suitable arc welding low ac by the main transformer and the necessary parts and instructions regulating devices and other components it has a simple structure easy to create easy to repair low cost high efficiency but the current waveform is sinusoidal the output fell for the exchange of external characteristics poor arc stability low power factor but the magnetic blow was rarely produced no load loss generally used in hand buried arc welding arc welding and w arc welding and other methods rectangular wave ac arc source it uses semiconductor control technology to get the rectangular wave ac current the arc stability multi adjustable parameters high power factor it is used in addition to exchange of gas tungsten arc welding tig can be used for submerged arc welding or even replace the electrode dc arc source for the basic hand welding dc arc welding generator generally by the dc generator and obtain the required special external features of the adjustment devices its big drawback is that no load loss magnetic blow phenomenon more obvious low efficiency noisy high cost maintenance is difficult advantage strong overload the output ripple is small can be used to power a variety of arc welding method can also be used diesel drive for field work without power arc welding rectifiers it is to be rectified ac dc by buck the external characteristics can be flat or decline which consists of the main transformer semiconductor rectifier device as well as to obtain the necessary regulatory devices external characteristic composition with the dc arc welding generator comparison it has the convenience low prices no load loss noise etc and most can be remote control can automatically compensate grid voltage fluctuation on the output voltage current impact but there are magnetic blow phenomenon it can be used as the power of various welding methods arc welding inverter it is the single phase or phase by the rectified alternating current from the inverter into a few hundred to tens of thousands of hertz frequency alternating current through the output ac or dc buck the whole process from electronic circuit controlled to meet the needs of power supply with external characteristics and dynamic characteristics it has a highly efficient energy saving light weight small size high power factor control performance fast dynamic response easy to implement real time control of welding process welding performance is good etc unique advantages can be used for a variety of arc welding method is one of the most promising universal type arc welding power source pulsed arc welding power welding current to pulse frequency modulation mode feed usually by the ordinary arc welding power source with pulse circuit there are other structural forms it has high efficiency less energy input lines can be a wide range of line of control energy and so on this welding power source is used more sensitive to heat input high alloy sheet and all position welding materials has a unique advantage
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