Rotor for an electric motor
AssigneeDanfoss Compressors GmbH
InventorNiels Christian Weihrauch
Life of this patent
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Abstract
The invention relates to a rotor for an electric motor, especially an electric line-start motor, comprising spaces (4 to 7) which receive permanent magnets (10 to 13) and extend in an axial direction, and spaces (20 to 25) that accommodate conductor rods and extend in an axial direction. In order for the rotor to run as regularly as possible, the spaces (20 to 25) accommodating the conductor rods are provided with a substantially elongate cross-section in at least one sector of the rotor while being embodied in a curved manner along the longitudinal axis thereof in said sector when viewed from a cross-sectional perspective.
Claims18
A rotor for an electric motor with axially extending receiving spaces for permanent magnets and with axially extending accommodating spaces for conductor rods, wherein in at least one sector of the rotor the accommodating spaces for the conductor rods have a substantially elongate cross-section, and that in the at least one sector, in a cross-sectional view, the accommodating spaces for the conductor rods are made to be curved along their longitudinal axis;
- and
- wherein in the at least one sector each accommodating space for conductor rods has two sidewalls, and, in a cross-sectional view, the two sidewalls of each accommodating space for conductor rods are curved in a similar direction.
A rotor for an electric motor with axially extending receiving spaces for permanent magnets and with axially extending accommodating spaces for conductor rods, wherein in at least one sector of the rotor the accommodating spaces for the conductor rods have a substantially elongate cross-section, and that in the at least one sector, in a cross-sectional view, the accommodating spaces for the conductor rods are made to be curved along their longitudinal axis;
- and
- wherein a plurality of permanent magnets are located so that they generate a magnet field with a neutral axis and a magnet axis, the curvature radii of the accommodating spaces for the conductor rods in the at least one sector decreasing from the neutral axis in the direction of the magnet axis.
A rotor for an electric motor with axially extending receiving spaces for permanent magnets and with axially extending accommodating spaces for conductor rods, wherein in at least one sector of the rotor the accommodating spaces for the conductor rods have a substantially elongate cross-section, and that in the at least one sector, in a cross-sectional view, the accommodating spaces for the conductor rods are made to be curved along their longitudinal axis;
- and
- wherein in a cross-sectional view each accommodating space for the conductor rods in the at least one sector has two side walls, which have different curvatures.
An electric motor comprising:
- a stator comprising a plurality of windings;
- and
- a rotor with axially extending receiving spaces for permanent magnets and with axially extending accommodating spaces for conductor rods, wherein in at least one sector of the rotor the accommodating spaces for the conductor rods have a substantially elongate cross-section, and that in the at least one sector, in a cross-sectional view, the accommodating spaces for the conductor rods are made to be curved along their longitudinal axis;
- and
- wherein the rotor is arranged to be rotational inside the stator;
- and
- wherein in the at least one sector each accommodating space for conductor rods has two sidewalls, and, in a cross-sectional view, the two sidewalls of each accommodating space for conductor rods are curved in a similar direction.
Dependencies are inferred from the claim text.