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Influence of shaft relative permeability on rotor losses in 2-pole slotless high-speed motor
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Millinger, J., Soulard, Juliette and Wallmark, O. (2016) Influence of shaft relative permeability on rotor losses in 2-pole slotless high-speed motor. In: 2016 XXII International Conference on Electrical Machines (ICEM), Lausanne, Switzerland, 4-7 Sep 2016. Published in: 2016 XXII International Conference on Electrical Machines (ICEM) pp. 405-411. ISBN 9781509025381. doi:10.1109/ICELMACH.2016.7732558
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Official URL: http://dx.doi.org/10.1109/ICELMACH.2016.7732558
Abstract
High-speed permanent-magnet (PM) machines play an important role in high-power density applications, where demands on high efficiency and low weight are elevated. However, high-speed PM machines present a high proportion of harmonic losses, resulting in requirements on large and costly filters, unless considered at the design stage. The high-speed machine in this paper is a 2-pole slotless design. Since the airgap flux density created by the stator windings is nearly sinusoidal, the rotor losses are pre-dominantly generated by time harmonics from the stator windings [1]. The phase-to-phase voltage harmonics from a 2-level regular-sampled pulse-width modulation (PWM) process (fig 1a) is illustrated in figure 1b. Harmonic sideband groups appear around multiples of the switching frequency n⋅fsw, where n is an integer. The two first harmonic sideband groups are illustrated in figure 1b. The sideband groups generate harmonic losses in the motor.
Item Type: | Conference Item (Paper) | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||
Journal or Publication Title: | 2016 XXII International Conference on Electrical Machines (ICEM) | ||||
Publisher: | IEEE Computer Society | ||||
ISBN: | 9781509025381 | ||||
Book Title: | 2016 XXII International Conference on Electrical Machines (ICEM) | ||||
Official Date: | 3 November 2016 | ||||
Dates: |
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Page Range: | pp. 405-411 | ||||
DOI: | 10.1109/ICELMACH.2016.7732558 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Conference Paper Type: | Paper | ||||
Title of Event: | 2016 XXII International Conference on Electrical Machines (ICEM) | ||||
Type of Event: | Conference | ||||
Location of Event: | Lausanne, Switzerland | ||||
Date(s) of Event: | 4-7 Sep 2016 |
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