CPC H02K 1/185 (2013.01) [H02K 5/24 (2013.01)] | 16 Claims |
1. An electric machine comprising:
a stator formed from a plurality of stacked laminations and defining a center bore; and
a rotor disposed within the center bore and configured to output a rotational torque in response to an input current delivered to the stator, wherein at least one of the stacked laminations of the stator includes a pattern of perforations disposed at a yoke portion of the stator to attenuate structure-bore transmission of vibration during operation of the electric machine, wherein the pattern of perforations comprises multiple groups of perforations arranged circumferentially about the rotor and wherein each of the groups of perforations outline a discrete rectangle, triangle, circle, or ellipse spaced away from other of the groups.
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