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Investigation of inverter-based losses and magnet-temperatures of a 1 MVA permanent magnet synchronous generator via a 25 kVA physical model

Untersuchung von Stromrichter-bedingten Verlusten und Magnettemperaturen an einem 1-MVA-Permanentmagnet-Synchrongenerator anhand eines physikalischen Modells (25 kVA)

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An Erratum to this article was published on 27 January 2015

Abstract

A physical model of a 1 MVA Permanent Magnet Synchronous Generator (PMSG) is derived by reducing the number of poles and the core length. The losses in sinusoidal operation are compared to the inverter-based operation using various switching frequencies. Also, the effects of magnetically conducting slot wedges in the stator are investigated. The model is equipped with a rotor temperature measurement system. Different rotors with surface mounted and embedded magnets are compared using the steady-state magnet-temperature as a measure of the losses in the magnets.

Zusammenfassung

Ein physikalisches Modell eines 1 MVA-Permanentmagnet-Synchrongenerators wird abgeleitet, indem die Polzahl und die aktive Eisenlänge reduziert wird. Die Verluste im Sinusbetrieb werden mit jenen im Stromrichterbetrieb bei verschiedenen Schaltfrequenzen verglichen. Zusätzlich werden die Einflüsse von magnetischen Nutverschlusskeilen im Stator untersucht. Das Modell ist mit einem System zur Messung der Rotortemperatur ausgestattet. Die Magnettemperatur wird als Maß für die Verluste in den Magneten herangezogen. Verschiedene Rotoren mit oberflächenmontierten und vergrabenen Magneten werden anhand dieser Größe verglichen.

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Acknowledgements

The authors would like to thank E. Schmidt of Vienna University of Technology for his support in derivating the physical model, W. Harb and A. Lechner of ANDRITZ HYDRO GmbH for their assistance concerning machine and inverter related topics as well as ANDRITZ HYDRO GmbH and FFG (Austrian Research Promotion Agency) for financing the research project.

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Authors and Affiliations

  1. Institute of Energy Systems and Electrical Drives, Vienna University of Technology, Gusshausstrasse 25–29, 1040, Vienna, Austria

    Bernhard Weiss, Harald Polt, Christoph Geschrey & Manfred Schroedl

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  1. Bernhard Weiss
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  2. Harald Polt
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  3. Christoph Geschrey
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  4. Manfred Schroedl
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Correspondence to Bernhard Weiss.

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Weiss, B., Polt, H., Geschrey, C. et al. Investigation of inverter-based losses and magnet-temperatures of a 1 MVA permanent magnet synchronous generator via a 25 kVA physical model. Elektrotech. Inftech. 132, 3–10 (2015). https://doi.org/10.1007/s00502-014-0274-1

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  • DOI: https://doi.org/10.1007/s00502-014-0274-1

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