| abstract |
The present invention restrains generation of an eddyncurrent caused by leaked magnetic flux, and reduces iron lossndue to the eddy current. n A tooth 61 is mounted to a stator yoke 60 in a state innwhich at least part of it (a portion 81 to be inserted intonthe yoke) is inserted into an insertion hole 75 formed throughnthe magnet-opposed surface of the stator yoke 60, and thencross-sectional area S1 (See Fig. 6A) of the portion 81 of thentooth 61 to be inserted into the yoke, which is takennperpendicularly with respect to lines of magnetic force B1ngenerated at the tooth 61 when a coil 62 is energized, is largernthan the cross-sectional area S2 (See Fig. 6B) of the portionn82 to be disposed within the coil of the tooth 61, which isntaken perpendicularly with respect to the lines of the magneticnforce B1. |