DocumentCode :
2375652
Title :
Design of PM brushless motors using iron-resin composites for automotive applications
Author :
Cros, J. ; Viarouge, P. ; Gélinas, C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Laval Univ., Que., Canada
Volume :
1
fYear :
1998
fDate :
12-15 Oct. 1998
Firstpage :
5
Abstract :
New iron-resin soft magnetic materials are now commercially available for AC magnetic applications. These materials, often referred as dielectromagnetics, generally present relative low values of permeability and induction of saturation, but they possess a lot of advantages, if they are properly used during the design process of motors. The relatively low values of unsaturated permeability are not an important drawback in the case of brushless permanent magnet (PM) motors. In this case, the effective airgap of the magnetic structure is imposed by the length of the magnet which has practically a relative permeability equal to unity. An automotive electric fan composed of a conventional PM DC motor with a mechanical collector has been chosen to illustrate the performances of the motors using these new soft magnetic materials and to validate the author´s design methods of brushless PM motors. Two prototypes of brushless PM motors using a dielectromagnetic material are presented, which can advantageously replace the conventional DC motor. These prototypes have concentrated windings rather than distributed windings in order to minimize the volume of copper. The magnetic structure of the first prototype is equipped with small teeth localized between the main poles. With this special arrangement, the experimental results show that the torque performances are the same as in the case of classical structures with distributed windings.
Keywords :
automotive electronics; brushless DC motors; magnetic flux; permanent magnet motors; soft magnetic materials; stators; AC magnetic applications; PM brushless motors; automotive applications; automotive electric fan; concentrated windings; design process; dielectromagnetics; effective airgap; iron-resin composites; magnetic structure; relative permeability; soft magnetic materials; torque performance; unsaturated permeability; Brushless DC motors; Brushless motors; DC motors; Magnetic materials; Permanent magnet motors; Permeability; Process design; Prototypes; Saturation magnetization; Soft magnetic materials;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications Conference, 1998. Thirty-Third IAS Annual Meeting. The 1998 IEEE
Conference_Location :
St. Louis, MO, USA
ISSN :
0197-2618
Print_ISBN :
0-7803-4943-1
Type :
conf
DOI :
10.1109/IAS.1998.732251
Filename :
732251
Link To Document :
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