Electrical motor with spherically supported rotor
OwnerKarsten A. Laing, Oliver P. Lainginventors
Life of this patent
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Abstract
To create an electric motor comprising a rotor, a stator and a bearing by which the rotor is spherically suspended, whereby the bearing comprises a bearing cap and a ball-shaped sliding partner which slides in the bearing cap, which motor allows a high degree of freedom in respect to the outer extensions while it has a play-free bearing, it is proposed that the rotor creates a magnetic field and that the bearing cap has a material-free area which is formed in such a way that a power vector of the total resulting force hits the material-free area when the rotor is asymmetric to the stator.
Claims16
Electric motor comprising a rotor (106), a stator (110) and a bearing (136) on which the rotor (106) is spherically supported, whereby the bearing (136) comprises a bearing cap (140) and a ball-shaped sliding partner (138) positioned in the bearing cap, characterized in that the rotor (106) induces a magnetic field and that the bearing cap (140) has a central material-free area (150) which is formed in such a way that the vector of the resulting total force points to the material-free area (150) when the rotor (106) is asymmetric in respect to the stator (110).
Electric motor according to one or more of the forgoing claims, characterized in that the rotor (106) comprises one ore more permanent magnets (116).
Electric motor according to one or more of the forgoing claims, characterized in that the rotor (106) contains a spherical surface area (118) facing the Stator.
Electric motor according to one or more of the forgoing claims, characterized in that an air gap (128) is formed between the rotor (106) and the stator (110) by the spherical surface areas (118, 130) having a distance from each other.
Electric motor according to one or more of the forgoing claims, characterized in that the central material-free area (15) is arranged around a lubrication hole and/or forms a lubrication hole.
Electric motor according to one or more of the forgoing claims, characterized in that the material-free area (150) is situated around an axis (122) of the rotor (106).
Electric motor according to one or more of the forgoing claims, characterized in that the material-free area (150) is arranged axially symmetrical around the axis (122)
Electric motor according to one or more of the forgoing claims, characterized in that the bearing cap (140) has a hollow cylindrical section (142) and a spherical section (148) which follows the hollow cylindrical section (142) in axial direction.
Electric motor according to one or more of the forgoing claims, characterized in that the material-free section (150) is positioned in the spherical section (148).
Electric motor according to one or more of the forgoing claims, characterized in that the diameter (M) of the material-free section (150) will be chosen as a function of the production tolerances.
Electric motor according to one or more of the forgoing claims, characterized in that a diameter (M) of the material-free section (150) is equal to or larger than 0.5 times the diameter (d) of the sliding partner (138).
Electric motor according to one or more of the forgoing claims, characterized in that a diameter (M) of the material-free section (150) is equal to or larger than 0.6 times the diameter (d) of the sliding partner (138).
Electric motor according to one or more of the forgoing claims, characterized in that a diameter (M) of the material-free section (150) is smaller the diameter (d) of the sliding partner (138).
Circulator pump which comprises an electric motor (100) according to one or more of the forgoing claims.
Dependencies are inferred from the claim text.