In-Line Estimation of the Magnetization Curve of Steel Strips in a Continuous Induction Furnace⁎The financial support by the Christian Doppler Research Association, the Austrian Federal Ministry for Digital and Economic Affairs, and the National Foundation for Research, Technology and Development, and voestalpine Stahl GmbH is gratefully acknowledged. Issue 2 (2020)

• Record Type: Journal Article
• Authors: Jadachowski, L.; Roetzer, F.; Steinboeck, A.; Kugi, A.
• Is Part Of: IFAC-PapersOnLine. Volume 53:Issue 2(2020)
• Page Start: 12062
• Page End: 12067
• Publication Date: 2020
• Subjects: Moving horizon estimator -- Parameter estimation -- B-H curve -- Effective magnetization -- Longitudinal flux induction -- Nonlinear Maxwell equations -- Parabolic PDE; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2020.12.750
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: An in-line parameter estimation strategy for continuous inductive heating of ferromagnetic steel strips is developed and investigated. During strip processing in a longitudinal flux induction furnace, the parameters of the magnetization curve (B-H curve) of the strip material are identified by a moving horizon estimator (MHE). The estimator uses a tailored 2D spatial-temporal model of the furnace which takes into account both the thermal and the electromagnetic subsystem. Other model parameters are identified in a scenario, where the magnetization curve of the strip is known. For model validation, the simulated strip temperature at the furnace exit is compared with measurements. To approximate the solution of the nonlinear Maxwell equations, the effective magnetization approach is applied. Here, a sophisticated hysteretic magnetization model is avoided in favor of the computing time, while magnetic saturation effects in the strip are still captured. The developed MHE is validated in a simulation scenario based on a strip with a known magnetization curve.