Patent ID: 6867525
Filing Date: 2005-03-15
Classification: H02K,Y10T

Abstract:
1. An electrical machine having an output rating (P x ), the electrical machine comprising: a shaft rotatable about an axis; a stator including a stator core and windings, the stator core having a fixed cross-sectional profile with respect to the axis; and a rotor coupled to the shaft and adapted to magnetically interact with the stator, the rotor having a periphery, the rotor being configured to include three or more axial sections, each of the axial sections having a respective magnetization pattern of alternating magnetic poles skewed with respect to the axis, the magnetization pattern for each of the axial sections being different than any adjacent axial section, the three or more axial sections defining a total length (L where (L where (P where (L where (P where each of the axial sections define an arc of skew (β) at the periphery, (β) being the same for each of the axial sections.