Inverter advantage
1) Introduction to the basic principles
Inverting and rectification are two opposite concepts. Rectification is the process of converting AC power into DC power, while inverter is the process of changing DC power to AC power. The arc welding power source using inverter technology is called inverter welding machine. The inverter process requires high power electronic switching devices. The working process of the inverter welding machine is to rectify the three-phase or single-phase power frequency alternating current, and after filtering, obtain a smoother direct current, and the inverter circuit converts the direct current into an alternating current of several tens of kilohertz, which is lowered by the main transformer. After pressing, the smooth DC output arc welding current is obtained by rectification and filtering. The magnitude of the arc welding current is varied by controlling the pulse width of the inverter as shown in the following figure.
2) Comparison of main technical parameters between inverter arc welding power source and traditional arc welding power source
Compared with the traditional welding and cutting equipment, the inverter welding and cutting equipment has the advantages of small size, light weight, energy saving, material saving, fast consumption, fast dynamic response, high efficiency and good arc welding performance. The advantages of digitalization of arc welding power supply are gradually becoming the mainstream of arc welding power supply. Comparison of 400 amp manual welders commonly used in industrial production:
According to the calculation, taking the 400 amp inverter welding machine as an example, the annual electricity saving: 16824.6 degrees, saving electricity costs 13291.5 yuan, the use of the welding machine can be recovered for half a year.
According to the calculation of 5 million production inverter welding machines, it can save 200,000 tons of copper materials and 320,000 tons of steel for the country. It does not include the energy consumption of these metal products for production, processing and transportation. Only smelting this can save the country. Industrial electricity is about 342 million kWh.
Users generally increase the degree of inverter acceptance, and the proportion of inverters in new purchases is much higher than the proportion of retained inverters.
According to Hongmei Market Research and Consulting Co., Ltd., interviews with users of welding and cutting equipment nationwide at the end of 2009, the total sample size is 196, the industry involves shipbuilding, steel structure, petrochemical pipeline engineering, construction engineering, electric power, rail vehicles, container production, General machinery, pressure vessel boilers, etc. Enterprises with relatively large scales in various application industries were selected to observe the demand of high-end users for welding and cutting equipment. According to the concentration of various industries, and the demand for welding and cutting equipment, the focus is on the ship, steel structure, pipeline / petrochemical and other industries.
A sample survey conducted by users showed that the proportion of inverters was only about 25% when the data held in 2009 was observed. In the recent purchases in 2009, the proportion of inverters was close to 50%. It shows that the trend of the inverter to replace some traditional models to a certain extent is obvious. At present, the user's awareness of the inverter is continuously improved. The advantages of energy saving, small size, high efficiency and good welding effect of the inverter arc welding power source have been recognized by a wide range of users. In particular, the large-scale power-saving effect of the inverter arc welding power source not only saves the user's manufacturing cost, but also conforms to the national energy-saving and environmental protection industry orientation. The inverter arc welding power source has been widely praised and recognized. Take the shipbuilding industry with the most concentrated demand for arc welding equipment. For example, the Tianjin Xingang Shipyard visited this study. In 2009, 50 welding and cutting equipment were purchased, 40 of which were inverter models, and the inverter accounted for 80%. At present, Tianjin Xingang Shipyard's welding and cutting equipment has a current holding capacity of 4,000 units, including 1,200 inverter models and 2,800 conventional models. The proportion of inverters is about 30%.
With the further improvement of the inverter technology, the failure rate of the inverter arc welding power supply is greatly reduced. More and more users tend to purchase the inverter type when selecting the model, and the ratio of the inverter is much higher than the inverse. The proportion of the variable guarantee quantity proves that the advantage of the inverter is recognized by the majority of users, and the application prospect is broad.
1) Introduction to the basic principles
Inverting and rectification are two opposite concepts. Rectification is the process of converting AC power into DC power, while inverter is the process of changing DC power to AC power. The arc welding power source using inverter technology is called inverter welding machine. The inverter process requires high power electronic switching devices. The working process of the inverter welding machine is to rectify the three-phase or single-phase power frequency alternating current, and after filtering, obtain a smoother direct current, and the inverter circuit converts the direct current into an alternating current of several tens of kilohertz, which is lowered by the main transformer. After pressing, the smooth DC output arc welding current is obtained by rectification and filtering. The magnitude of the arc welding current is varied by controlling the pulse width of the inverter as shown in the following figure.
2) Comparison of main technical parameters between inverter arc welding power source and traditional arc welding power source
Compared with the traditional welding and cutting equipment, the inverter welding and cutting equipment has the advantages of small size, light weight, energy saving, material saving, fast consumption, fast dynamic response, high efficiency and good arc welding performance. The advantages of digitalization of arc welding power supply are gradually becoming the mainstream of arc welding power supply. Comparison of 400 amp manual welders commonly used in industrial production:
According to the calculation, taking the 400 amp inverter welding machine as an example, the annual electricity saving: 16824.6 degrees, saving electricity costs 13291.5 yuan, the use of the welding machine can be recovered for half a year.
According to the calculation of 5 million production inverter welding machines, it can save 200,000 tons of copper materials and 320,000 tons of steel for the country. It does not include the energy consumption of these metal products for production, processing and transportation. Only smelting this can save the country. Industrial electricity is about 342 million kWh.
Users generally increase the degree of inverter acceptance, and the proportion of inverters in new purchases is much higher than the proportion of retained inverters.
According to Hongmei Market Research and Consulting Co., Ltd., interviews with users of welding and cutting equipment nationwide at the end of 2009, the total sample size is 196, the industry involves shipbuilding, steel structure, petrochemical pipeline engineering, construction engineering, electric power, rail vehicles, container production, General machinery, pressure vessel boilers, etc. Enterprises with relatively large scales in various application industries were selected to observe the demand of high-end users for welding and cutting equipment. According to the concentration of various industries, and the demand for welding and cutting equipment, the focus is on the ship, steel structure, pipeline / petrochemical and other industries.
A sample survey conducted by users showed that the proportion of inverters was only about 25% when the data held in 2009 was observed. In the recent purchases in 2009, the proportion of inverters was close to 50%. It shows that the trend of the inverter to replace some traditional models to a certain extent is obvious. At present, the user's awareness of the inverter is continuously improved. The advantages of energy saving, small size, high efficiency and good welding effect of the inverter arc welding power source have been recognized by a wide range of users. In particular, the large-scale power-saving effect of the inverter arc welding power source not only saves the user's manufacturing cost, but also conforms to the national energy-saving and environmental protection industry orientation. The inverter arc welding power source has been widely praised and recognized. Take the shipbuilding industry with the most concentrated demand for arc welding equipment. For example, the Tianjin Xingang Shipyard visited this study. In 2009, 50 welding and cutting equipment were purchased, 40 of which were inverter models, and the inverter accounted for 80%. At present, Tianjin Xingang Shipyard's welding and cutting equipment has a current holding capacity of 4,000 units, including 1,200 inverter models and 2,800 conventional models. The proportion of inverters is about 30%.
With the further improvement of the inverter technology, the failure rate of the inverter arc welding power supply is greatly reduced. More and more users tend to purchase the inverter type when selecting the model, and the ratio of the inverter is much higher than the inverse. The proportion of the variable guarantee quantity proves that the advantage of the inverter is recognized by the majority of users, and the application prospect is broad.
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