Title :
Inter-laminar flux and eddy current losses in a circumferentially cooled stator core
Author :
Festa, M. ; Eberhardt, H. -D ; Hofmann, W.
Author_Institution :
Dept. of Electr. Machines & Drives, Tech. Univ. Dresden, Dresden, Germany
Abstract :
The circumferential cooling system, which provides highly effective, integrated but low-cost motor cooling, is introduced. This work is focussed particularly on magnetic effects, which arise from the special construction of the stator core. An explanation for the existence of inter-laminar flux is given and equations for the prediction of its absolute value are derived. Two approaches, an analytical and a numerical one, for the estimation of power losses due to inter-laminar flux are introduced. In agreement with the calculation results, measurements prove that power losses due to axial flux are very small and are not a concern for the design of a circumferentially cooled machine.
Keywords :
eddy current losses; electric machines; magnetic circuits; magnetic flux; magnetic leakage; stators; axial flux; circumferentially cooled stator core; eddy current losses; interlaminar flux; magnetic effects; motor cooling; power losses; Cooling; Eddy currents; Lamination; Magnetic cores; Magnetic flux; Stator cores; Cooling; Direct lamination cooling; Eddy currents; Electric machines; Electromagnetic analysis; Losses; Magnetic circuits; Magnetic losses; Road vehicle electric propulsion; Traction motors;
Conference_Titel :
Electrical Machines (ICEM), 2010 XIX International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4174-7
Electronic_ISBN :
978-1-4244-4175-4
DOI :
10.1109/ICELMACH.2010.5608101