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Force density limits in low-speed permanent-magnet machines due to saturation

Prakashraj Kasinathan (Institutionen för energi och miljö, Elteknik) ; Anders Grauers (Institutionen för energi och miljö, Elteknik) ; Essam Hamdi (Institutionen för energi och miljö, Elteknik)
IEEE Transactions on Energy Conversion (08858969 (ISSN)). Vol. 20 (2005), 1, p. 37-44.
[Artikel, refereegranskad vetenskaplig]

This paper discusses the practical limits imposed by magnetic saturation for the force density in low-speed permanent-magnet electric machines. The force density dependence on current density and slot depth is investigated with the aid of finite-element modeling. For saturation reasons, shallow slots are more favorable for achieving high force densities. However, for thermal reasons, deeper slots become favorable. Therefore, an optimum slot depth that maximizes the force density for each current density level exists. The maximum allowable slot depth range for four low-speed applications has been identified for a given maximum motor diameter.

Denna post skapades 2010-01-21. Senast ändrad 2016-03-23.
CPL Pubid: 109683


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Institutioner (Chalmers)

Institutionen för energi och miljö, Elteknik (2005-2017)



Chalmers infrastruktur