Design of a measurement system for investigating the magnetic characteristics of soft magnetic materials for non-sinusoidal periodic excitations
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Gerd Bramerdorfer
Gerd Bramerdorfer received the PhD in Electrical Engineering in 2014 from Johannes Kepler University Linz, Linz, Austria. Since 2007 he has been with the Institute of Electrical Drives and Power Electronics, Johannes Kepler University Linz. His research interests include the design, modeling, and optimization of high-efficient brushless electrical machines. Thereby, measuring and modeling the characteristics of soft magnetic materials takes top priority.
Johannes Kepler University Linz, Institute for Electrical Drives and Power Electronics, Altenbergerstraße 69, 4040 Linz, Austria
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Dietmar Andessner
Dietmar Andessner was born in Wels, Austria, in 1976. He received the Dipl.-Ing. degree in electrical engineering from the TU-Graz, Austria, in 2003. He was Scientific Assistant at the Institute for Electric Drives and Power Electronics at the University Linz since 2004. Since 2010 he holds a position as senior researcher at this institute. In December 2015 he moved to the Linz Center of Mechatronics GmbH (LCM) and is currently working on electric machine design and project management.
Linz Center of Mechatronics GmbH, Altenbergerstraße 69, 4040 Linz, Austria
Wolfgang Amrhein was born in Aschaffenburg, Germany, in 1957. He received the M.Sc. (Dipl.-Ing.) degree in electrical engineering in 1982 from the Technical University Darmstadt, Germany, and his Ph.D. (Dr. sc.techn.) degree in 1988 from the Swiss Federal Institute of Technology Zurich, Switzerland. From 1982 to 1990, he was with the Swiss Federal Institute of Technology Zurich as a Scientific Assistant. In 1990, he joined Papst Motoren GmbH, St. Georgen, Germany, where he became the Head of the development department in 1992. Since 1994, he has been a Professor and subsequently the Head of the Institute of Electrical Drives and Power Electronics, Johannes Kepler University (JKU), Linz, Austria. From 2000 to 2007 he was Scientific Head of the Linz Center of Competence in Mechatronics, Austria, together with Prof. R. Scheidl. Since 2010 he is also Head of the JKU HOERBIGER Research Institute for Smart Actuators at JKU. His research interests include electric drives, with special emphasis on small electric motors, magnetic bearing systems, bearingless motors, and power electronics.
Johannes Kepler University Linz, Institute for Electrical Drives and Power Electronics, Altenbergerstraße 69, 4040 Linz, Austria
Bernhard Bauer received his diploma degree in Mechatronics at the University of Linz, Austria in 2012. He is employed as an R&D engineer at Dr. Johannes Heidenhain GmbH, where he currently works on signal processing and motion control.
Dr. Johannes Heidenhain GmbH, Dr.-Johannes-Heidenhain-Straße 5, 83301 Traunreut, Germany
Abstract
This article is about the design of a measurement system for measuring the iron losses in soft magnetic materials exerted by periodic flux density characteristics. The losses are due to hysteresis and eddy currents effects. The aim is to predict the iron losses which occur in electric machines. Common loss modeling techniques are derived by considering sinusoidal flux density characteristics. As nowadays highly-utilized machine designs with special winding topologies are employed, the periodic flux density characteristics in a big part of the ferromagnetic components are far off from being sinusoidal. Hence, the here presented measurement system and the associated control are especially developed for analyzing any periodic flux density characteristics. A further part of this article is dedicated to the comparison of state-of-the-art iron loss modeling techniques and measurement results. Several scenarios with different flux density harmonic magnitudes and frequencies are considered. It turns out that currently available loss modeling techniques show significant modeling errors for non-sinusoidal periodic flux density excitations. Thus, future work has to be on deriving more accurate models by considering their applicability for computer-aided engineering software.
Zusammenfassung
Dieser Artikel beschreibt das Design einer Messvorrichtung zur Bestimmung der Eisenverluste in weichmagnetischen Materialien, die durch beliebige periodische Flussdichteverläufe hervorgerufen werden. Die Verluste entstehen durch Hystese- und Wirbelstromeffekte. Das Ziel der Arbeit ist die verbesserte Vorhersage der Eisenverluste in elektrischen Maschinen. Aktuell verfügbare Verlustmodelle basieren auf der Analyse von sinusförmigen Flussdichteverläufen im Material. Nachdem die weichmagnetischen Materialien heute verwendeter Maschinendesigns meist hoch ausgenützt und außerdem spezielle Wicklungstopologien verwendet werden, zeigen die im Material auftretenden Flussdichteverläufe meist eine starke Abweichung von der Sinusform. Daher wurde bei der Konzeption des hier vorgestellten Messsystems und der zugehörigen Regelung speziell darauf geachtet, dass eine Einprägung beliebiger periodischer Flussdichteverläufe mit hoher Genauigkeit ermöglicht wird. Außerdem werden in der Folge unterschiedliche Szenarien bezogen auf die Ummagnetisierungsfrequenz und die vorhandenen Flussdichteharmonischen untersucht. Dabei werden Verlustmodelle nach Stand der Technik mit Messergebnissen verglichen. Es zeigt sich, dass für nicht-sinusförmige periodische Flussdichteverläufe teils sehr große Modellierungsfehler entstehen. Daher wird in Zukunft verstärkt an der Entwicklung neuer Modelle gearbeitet, die eine bessere Abschätzung der Verluste in weichmagnetischen Materialien zulassen. Neben der verbesserten Modellgenauigkeit muss aber auch immer die Anwendbarkeit der Modelle in gängigen computergestützten Entwicklungsumgebungen berücksichtigt werden. Als Beispiel seien hier Finite-Elemente-Programme genannt.
About the authors
Gerd Bramerdorfer received the PhD in Electrical Engineering in 2014 from Johannes Kepler University Linz, Linz, Austria. Since 2007 he has been with the Institute of Electrical Drives and Power Electronics, Johannes Kepler University Linz. His research interests include the design, modeling, and optimization of high-efficient brushless electrical machines. Thereby, measuring and modeling the characteristics of soft magnetic materials takes top priority.
Johannes Kepler University Linz, Institute for Electrical Drives and Power Electronics, Altenbergerstraße 69, 4040 Linz, Austria
Dietmar Andessner was born in Wels, Austria, in 1976. He received the Dipl.-Ing. degree in electrical engineering from the TU-Graz, Austria, in 2003. He was Scientific Assistant at the Institute for Electric Drives and Power Electronics at the University Linz since 2004. Since 2010 he holds a position as senior researcher at this institute. In December 2015 he moved to the Linz Center of Mechatronics GmbH (LCM) and is currently working on electric machine design and project management.
Linz Center of Mechatronics GmbH, Altenbergerstraße 69, 4040 Linz, Austria
Wolfgang Amrhein was born in Aschaffenburg, Germany, in 1957. He received the M.Sc. (Dipl.-Ing.) degree in electrical engineering in 1982 from the Technical University Darmstadt, Germany, and his Ph.D. (Dr. sc.techn.) degree in 1988 from the Swiss Federal Institute of Technology Zurich, Switzerland. From 1982 to 1990, he was with the Swiss Federal Institute of Technology Zurich as a Scientific Assistant. In 1990, he joined Papst Motoren GmbH, St. Georgen, Germany, where he became the Head of the development department in 1992. Since 1994, he has been a Professor and subsequently the Head of the Institute of Electrical Drives and Power Electronics, Johannes Kepler University (JKU), Linz, Austria. From 2000 to 2007 he was Scientific Head of the Linz Center of Competence in Mechatronics, Austria, together with Prof. R. Scheidl. Since 2010 he is also Head of the JKU HOERBIGER Research Institute for Smart Actuators at JKU. His research interests include electric drives, with special emphasis on small electric motors, magnetic bearing systems, bearingless motors, and power electronics.
Johannes Kepler University Linz, Institute for Electrical Drives and Power Electronics, Altenbergerstraße 69, 4040 Linz, Austria
Bernhard Bauer received his diploma degree in Mechatronics at the University of Linz, Austria in 2012. He is employed as an R&D engineer at Dr. Johannes Heidenhain GmbH, where he currently works on signal processing and motion control.
Dr. Johannes Heidenhain GmbH, Dr.-Johannes-Heidenhain-Straße 5, 83301 Traunreut, Germany
Acknowledgement
This work was conducted within LCM GmbH as a part of the COMET K2 program of the Austrian government. The projects are kindly supported by the Austrian and Upper Austrian government. The authors thank all supporters with special thanks to Miba Sinter Group and voestalpine, who provide funding for this particular research.
©2016 Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Frontmatter
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- Design of a measurement system for investigating the magnetic characteristics of soft magnetic materials for non-sinusoidal periodic excitations
- Ortsaufgelöste Impedanzspektroskopie an einer PEM-Brennstoffzelle
- Anwendung des Reziprozitätsverfahrens zur Kalibrierung von Elektretmikrofonen
- Flüssigkeitsanalyse mittels MIR-Laser-Photometer zum Spurennachweis von Isocyanat in Lösungsmitteln
- Ein mobiles zur Mikrodrallmessung geeignetes Messsystem und dessen Kalibrierung
- Fractal analysis of a new generation of HVOF sprayed coatings based on optical surface metrology
- Scannende Infrarotdeflektometrie für die Inspektion diffus spiegelnder Oberflächen
- Rapid Communication
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Articles in the same Issue
- Frontmatter
- Beiträge
- Design of a measurement system for investigating the magnetic characteristics of soft magnetic materials for non-sinusoidal periodic excitations
- Ortsaufgelöste Impedanzspektroskopie an einer PEM-Brennstoffzelle
- Anwendung des Reziprozitätsverfahrens zur Kalibrierung von Elektretmikrofonen
- Flüssigkeitsanalyse mittels MIR-Laser-Photometer zum Spurennachweis von Isocyanat in Lösungsmitteln
- Ein mobiles zur Mikrodrallmessung geeignetes Messsystem und dessen Kalibrierung
- Fractal analysis of a new generation of HVOF sprayed coatings based on optical surface metrology
- Scannende Infrarotdeflektometrie für die Inspektion diffus spiegelnder Oberflächen
- Rapid Communication
- Novel pyroelectric detectors for accurate THz power measurements
