Tuesday, 26 June 2018, 12:00-12:40
Chairperson: Dr. Dapeng Zheng, Shenzhen Hopewind Electric, CHN
||A Vision on Industrial Induction Heating Converter Technology: Trends and Challenges
Enrique J. Dede, University of Valencia, Spain
Power Converters for Industrial Induction Heating ranges from power levels of 5 kW to several MW and frequencies from 0,5 kHz to 500 kHz depending on the heating application. Forging and melting applications require very high power levels in the MW range but very low frequencies. On the opposite, tube welding require medium power levels, less than 1 MW, but extreme high frequencies as 500 kHz.
Actual Power Converters for Industrial Induction Heating are based in Si-IGBT and Si-MOS Technology with heavy connection bus bars, efficiencies in the range of 90% and power densities in the range of 2-5 kW/litre.
With the advent of new active and passive components, some of them pushed by the e-mobility requirements, a complete new vision on the converter technology for induction heating converters is foreseen. Wideband semiconductors can dramatically improve efficiency to higher than 99% as well as reliability, advanced passives and high current PCB technology can help to increase power density by around ten times compared with the actual standard technology and improve converter reliability as per its automatized production.
New powerful FPGA and u-Controllers will add smartness to the induction heating converters due to its very high processing capabilities allowing the development of innovative algorithms with a closer interaction between the heating process and the converter, so that the induction heating converter no longer simply “processes” the piece to be heated, but it feedbacks the electrical parameters to the generator that auto-adjusts its parameters accordingly for optimizing the heating process.