Induction heating before steel pipe welding

This article examines the problem of electromagnetic coupling between inductors during low-temperature induction heating of steel pipes prior to welding. This coupling creates loading interference for high-frequency supply sources. A solution is proposed based on the use of a single power source for two inductors with independent power control via frequency variation. A method for distributing the total power between the inductors is developed, taking into account the magnetic coupling within their circuits. The obtained results allow for increased efficiency and stability of the heating system.

Authors: S. S. Adoh, Yu. Yu. Perevalov

Direction: Electrical Engineering

Keywords: induction heating, power regulation, magnetic coupling, frequency hopping, independent regulation, low-frequency circuit

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