| 摘要 |
A rotor bar cross-section and a rotor lamination slot define an asymmetrical shape divided into first and second sides about a longitudinally extending centerline, with the first and second sides being asymmetrical relative to the centerline. The first longitudinal side has upper and lower portions connected by a middle portion. The upper, middle and lower portions each include a respective point on the outer periphery of the bar located farthest from the centerline. These respective points define first, second and third distances between the respective points and the centerline, with the second distance being less than either of the first and third distances. The second longitudinal side has an upper portion directly connected to a lower portion. In certain embodiments, pairs of slots are arranged "face to face" to maintain the symmetry of the rotor lamination, even though the slots or bars themselves are asymmetrical. This improves manufacturability by allowing the use of traditional rotor construction methods for symmetrical rotor slots.
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