Please use this identifier to cite or link to this item: doi:10.22028/D291-30627
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Title: Impact of the embedding of magnets on a sensorless drive method
Author(s): Kleen, Stephan
Nienhaus, Matthias
Editor(s): Nienhaus, Matthias
Language: English
Title: Innovative Klein- und Mikroantriebstechnik : Beiträge der 11. GMM/ETG-Fachtagung 27.-28. September 2017 in Saarbrücken
Startpage: 63
Endpage: 67
Publisher/Platform: VDE-Verlag
Year of Publication: 2017
Title of the Conference: IKMT-Tagung 2017 - 11. GMM/ETG-Fachtagung
Place of the conference: Saarbrücken, Germany
Publikation type: Conference Paper
Abstract: Various sensorless control methods such as "Direct Flux Control" (DFC) make use of machine anisotropies to detect the rotor position. Such anisotropies lead to rotor-position-dependent phase inductances. It is known in principle that the ratio between Ldd and Lqq in a machine can be influenced, for example, by embedding the permanent magnets or by designing the magnetic circuit in a way that the soft magnetic material is driven into the strongly non-linear saturation region of the BH curve. This paper is intended to quantify these effects and their impact on the DFC signals. After a brief explanation of the physical effects which lead to magnetic anisotropies, the impact of embedding the magnets on the phase inductances and their influence on the DFC signals is discussed for a selected motor. The motor specific quantities and the DFC signals are calculated via finite element calculations (FEM). Concerning the soft magnetic materials nonlinear and hysteresis effects are taken into account. The results are reinforced by measurements and transferred to similar motor designs with different slot-pole combinations.
URL of the first publication:
Link to this record: hdl:20.500.11880/28938
ISBN: 978-3-8007-4461-9
Date of registration: 3-Apr-2020
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Systems Engineering
Professorship: NT - Prof. Dr. Matthias Nienhaus
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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