NDLI: Identifying manufacturing induced rotor and stator misalignment in brushless permanent magnet motors

Content Provider	IEEE Xplore Digital Library
Author	Thiele, M. Heins, G. Patterson, D.
Copyright Year	2014
Description	Author affiliation: Regal Beloit Australia Pty Ltd., Australia (Heins, G.; Patterson, D.) \|\| Charles Darwin Univ., Darwin, NT, Australia (Thiele, M.)
Abstract	Cogging torque in fractional pitch PMSM is minimized when manufacturing induced errors are also minimized. This paper investigates additional cogging torque harmonics resulting from misalignment of the rotor and stator caused by assembly and manufacturing tolerances in an axial flux, fractional pitch PMSM. A hybrid analytical / FEA method utilizing superposition of a pole transition over a single stator slot is developed to predict the effect on cogging torque of angular misalignment in combination with pole and slot placement inaccuracies. This work extends on that previously published by inducing varying degrees of assembly misalignment of the stator and rotor to determine the effect on cogging torque waveforms. Experimental data is presented supporting the analytical data indicating that static angular misalignment produces sidebands about the rotor affected harmonics and dynamic angular misalignment creates sidebands around the stator affected harmonic. There is good agreement between the analytical method, FEA and measured experimental data.
Sponsorship	IEEE
Starting Page	2728
Ending Page	2733
File Size	1170103
Page Count	6
File Format	PDF
ISBN	9781479943890
DOI	10.1109/ICELMACH.2014.6960574
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-02
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Torque Axial flux Rotors Amplitude modulation Harmonic analysis cogging torque torque Forging PMSM fractional pitch frequency analysis angular misalignment Stators
Content Type	Text
Resource Type	Article

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