Analysis of iron and eddy-current loss in low-power BLDC motor with magnet segmentation

• Autorzy: Młot A. , Korkosz M. , Łukaniszyn M.

Warianty tytułu

PL

Analiza strat w żelazie i magnesach w silniku BLDC małej mocy z magnesami segmentowymi

• Języki publikacji: EN

Abstrakty

EN

This paper considers a Brushless Direct Current (BLDC) machine prototype with six poles and 36 stator slots including a three phase double-layered distributed winding. The permanent magnet (PM) eddy-current loss is relatively small compared with the iron loss; it may cause significant heating of the PMs, due to the relatively poor heat dissipation from the rotor and results in partial irreversible demagnetization. A reduction in loss is achieved by magnet segmentation mounted on the rotor. Different number of magnet segmentation is analysed. The presented work concerns the computation of the no-load iron loss in the stator, rotor yoke and eddy-current loss in the magnets. It is shown that the construction of the rotor with segmented magnets can significantly reduce PM loss (eddy-eurrent loss). Eddy-current loss in PMs is caused by several machine features; the winding structure and large stator slot openings cause flux density variations that induce eddy-currents in the PMs. The effect of these changes to the BLDC motor design is examined in order to improve machine performance. 3-D finite-clcmcnt analysis (FEA) is used to investigate the electromagnetic behaviour of the BLDC motor.

Słowa kluczowe

EN

BLDC motor; iron losses; permanent magnet

PL

silnik bezszczotkowy; silnik BLDC; straty w żelazie; magnes trwały

• Wydawca: Sieć Badawcza Łukasiewicz - Górnośląski Instytut Technologiczny
• Czasopismo: Maszyny Elektryczne : zeszyty problemowe
• Rocznik: 2011
• Tom: Nr 5(93)
• Strony: 59--64
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Młot A.

autor

Korkosz M.

autor

Łukaniszyn M.

• Politechnika Opolska, Wydział Elektryczny, ul. Luboszycka 7, 45-036, Opole,

Bibliografia

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• [3] Boglietti A., Cavagnino A., Ionel D.M., Popescu M., Staton D.A, Vaschetto S.: A general model to predict the iron losses in inverter fed induction motors. Energy Conversion Congress and Exposition, ECCE 2009, IEEE, September 2009, pp. 1067-1074.
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• [8] Chen Y., Pillay P.: An improved formula for lamination core loss calculations in machines operating with high frequency and high flux density excitation. Industry Applications Conference, 2002, Vol 2, pp. 759-766.
• [9] Bertotti G.: General properties of power losses in soft ferromagnetic materials. IEEE Transactions on Magnetics, vol. 24, no. 1, January 1988, pp. 621- 630.
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