Rotor

摘要

A rotor (2) for an electric motor, which rotor (2) includes a plurality of laminated rotor sheets (4) arranged in layers and each provided with slots (6, 10); a number of permanent magnets (8) arranged within magnet slots (10) in the laminated rotor sheets (4), where an end area (16) of each magnet slot (10) is a magnet free area. The rotor (2) also includes a plurality of rotor bars (14) arranged in rotor bar slots (6) and a rotor sheet band (22) provided between the end area (16) and the adjacent rotor bar slot (6). At least one notch (28, 29) extending from the edge (21) of the rotor bar slot (6) and/or from the edge (21′) of the end area (16) divides the rotor sheet band (22) into a first area (24) and a second area (26). The smallest width (D1) of the first area (24) is smaller than the smallest width (D2) of the second area (26).

主权项

1. A rotor for an electric motor, the rotor comprising:
a plurality of laminated rotor sheets arranged in layers, each of the sheets being provided with magnet slots and rotor bar slots; a number of permanent magnets arranged within the magnet slots in the laminated rotor sheets, where an end area of each magnet slot is a magnet free area; a plurality of rotor bars arranged in rotor bar slots; and a rotor sheet band provided between the end area and an adjacent rotor bar slot, wherein at least one notch extends from an edge of the rotor bar slot and divides the rotor sheet band into a first area and a second area, where a smallest width of the first area is smaller than a smallest width of the second area, wherein a length of the first area is smaller than a fourth of a length of a side of the rotor bar slot that faces a side of an adjacent magnet slot, wherein said second area is a notch free area.