The development and application of induction furnace technology are briefly introduced as follows:<\/p>\n\n\n\n
In 1831, Faraday (M. Faraday) discovered the phenomenon of electromagnetic induction: when the magnetic flux passing through a closed conductor loop changes, an induced current is generated in the loop. Based on the phenomenon of electromagnetic induction, Faraday created the modern concept of induction heating.<\/p>\n\n\n\n
In 1890, the Swedes invented the first induction melting furnace, a slotted-cored furnace. In 1916, the Americans manufactured a closed-slotted cored furnace for the smelting of non-ferrous metals.<\/p>\n\n\n\n
The industrial frequency furnace was produced in the 1930s. In 1921, the coreless furnace appeared in the United States, using a spark-type intermediate frequency power supply. Later, the intermediate frequency unit power supply and the current thyristor variable frequency power supply appeared. age.<\/p>\n\n\n\n
In 1957, the thyristor developed by the United States marked the beginning of modern power electronics technology and also led induction heating technology into practical applications.<\/p>\n\n\n\n
In 1966, Switzerland and West Germany first developed induction heating devices using thyristors, and since then induction heating technology has developed rapidly. Soon, high-frequency power supplies and frequency multiplier power supplies also appeared one after another due to different process requirements.<\/p>\n\n\n\n
China’s induction furnace heating technology really began in 1956, imported from the former Soviet Union, and mainly used in the automobile industry.<\/p>\n\n\n\n
In the late 20th century, with the development of the power supply equipment manufacturing industry, induction hardening process equipment followed closely behind. <\/p>\n\n\n\n
Now China’s induction hardening process equipment is expanding day by day, with a wide variety of products. The equipment that originally needed to be imported is gradually replaced by domestic products. <\/p>\n\n\n\n
While saving foreign exchange for the country, it has also developed related domestic enterprises.<\/p>\n\n\n\n
At present, the main service object of the induction heating manufacturing industry is the automobile manufacturing industry. In the future, the modern metallurgical industry will have a higher demand for induction heating.<\/p>\n\n\n\n
At present, the development of induction furnace technology is proceeding in the following directions:<\/p>\n\n\n\n
1) The high-frequency power supply uses semiconductor power devices, and the output power is getting larger and larger.<\/p>\n\n\n\n