Electric machine, in particular electric motor
AssigneeSole S.p.A.
InventorLjubomir Kopac
Life of this patent
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Abstract
Electric machine in which parts subject to magnetostrictive forces are sized and configured in a particular manner. Such parts (1) have radial dimensions that vary along the axial direction. The pads are formed by laminations (12) that are assembled in an alternated arrangement, either individually or by groups, and have differing inner and/or outer dimensions and/or shapes. Such a solution is instrumental in reducing the noise caused by vibrations brought about by the electromagnetic forces generated by the machine.
Claims12
An electric machine comprising a first lamination and a second lamination stacked on a longitudinal axis, the first and the second laminations having a same radially varying shape, wherein the first lamination is angularly offset with respect to the second lamination so that a radial dimension of the first lamination varies in a discontinuous manner from a radial dimension of the second lamination along the longitudinal axis.
An electric machine comprising, a plurality of first lamination groups, each first lamination group having at least one first lamination, the first lamination having a first radial dimension, and a plurality of second lamination groups, each second lamination group having at least one second lamination, the second lamination having a second radial dimension, the second radial dimension being different from the first radial dimension of the first lamination, wherein the first lamination groups and the second lamination groups are alternately stacked along a longitudinal axis to form a yoke, the yoke having radial discontinuities along the longitudinal axis formed by adjacent first and second lamination groups.
An electric machine comprising, a stator having a first lamination and a second lamination stacked on a longitudinal axis, the first and second laminations having different radial dimensions so that a radial dimension of the first lamination varies in a discontinuous manner from a radial dimension of the second lamination along the longitudinal axis, and a rotor intersects a transverse axis through the discontinuity between the first and the second laminations.
Dependencies are inferred from the claim text.