A stator and a method of fabricating a stator. In various cases, the stator includes an electromagnetic core comprising a stack of laminations. A dielectric layer can be coupled to one of a first or second lamination of the stack of laminations and a heat transfer layer, different from the dielectric layer, can be coupled to the other of the first lamination and the second lamination. An interface between the first lamination and the second lamination comprises the dielectric layer and the heat transfer layer.
H02K 5/15 - Mounting arrangements for bearing-shields or end plates
H02K 5/18 - Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
H02K 5/24 - CasingsEnclosuresSupports specially adapted for suppression or reduction of noise or vibrations
H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 9/08 - Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
H02K 11/25 - Devices for sensing temperature, or actuated thereby
H02K 15/10 - Applying solid insulation to windings, stators or rotors, e.g. applying insulating tapes
A method of fabricating a stator and a stator where the method includes providing a plurality of electromagnet cores, with each electromagnet core having a stack of laminations defining a tooth and a yoke segment. The yoke segment is defined by a stack of laminations having a tongue structure and an opposing groove structure. Representative methods also include providing an insulating bobbin surrounding a portion of the tooth of each lamination, such that each lamination is held against adjacent laminations by the bobbin. The method further includes the step of winding electrically conductive windings around a portion of the bobbin, and assembling the plurality of electromagnets into a stator by mating the tongue structure and the groove structure of each electromagnet with a corresponding tongue structure and a corresponding groove structure of adjacent electromagnets. Additional embodiments includes a stator having the above characteristics.
H02K 5/15 - Mounting arrangements for bearing-shields or end plates
H02K 5/18 - Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
H02K 5/24 - CasingsEnclosuresSupports specially adapted for suppression or reduction of noise or vibrations
H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 9/08 - Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
H02K 11/25 - Devices for sensing temperature, or actuated thereby
H02K 15/10 - Applying solid insulation to windings, stators or rotors, e.g. applying insulating tapes
An electric machine including a rotor shaft having an inner shaft core with a first composition and an outer shaft portion surrounding at least some of the inner shaft core. The outer shaft portion is fabricated from a material having a different composition than the inner shaft core. For example, the inner shaft core could be fabricated from a material having high thermal conductivity, such as copper, while the outer shaft portion is fabricated from a material with lesser thermal conductivity, but greater strength, for example steel. The two-material shaft with a highly thermally conductive core serves to conduct heat from the interior of the electric machine to the housing, or to an exterior apparatus or structure.
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
H02K 3/44 - Protection against moisture or chemical attackWindings specially adapted for operation in liquid or gas
H02K 3/30 - Windings characterised by the insulating material
H02K 3/32 - Windings characterised by the shape, form or construction of the insulation
H02K 5/18 - Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 9/08 - Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
H02K 11/25 - Devices for sensing temperature, or actuated thereby
H02K 1/12 - Stationary parts of the magnetic circuit
H02K 5/24 - CasingsEnclosuresSupports specially adapted for suppression or reduction of noise or vibrations
An electric machine rotor including a shaft, a rotor back assembly surrounding a portion of the shaft, and a plurality of permanent magnets distributed at equal radial distance from the shaft around the rotor back assembly. The electric machine rotor also includes a gap between two adjacent permanent magnets and a thermally conductive material filing the gap. The thermally conductive material is in contact with the rotor back assembly between the two adjacent permanent magnets. The electric machine rotor also includes a heat transfer structure in thermal communication with the thermally conductive material, extending beyond an outer surface of the thermally conductive material to transfer heat away from the electric machine rotor.
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
H02K 3/44 - Protection against moisture or chemical attackWindings specially adapted for operation in liquid or gas
H02K 3/30 - Windings characterised by the insulating material
H02K 3/32 - Windings characterised by the shape, form or construction of the insulation
H02K 5/18 - Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 9/08 - Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
H02K 11/25 - Devices for sensing temperature, or actuated thereby
H02K 1/12 - Stationary parts of the magnetic circuit
H02K 5/24 - CasingsEnclosuresSupports specially adapted for suppression or reduction of noise or vibrations
A floating heat pump system including a superstructure supporting a wind turbine and at least one electric generator mechanically connected to the wind turbine. Wind-induced rotation of the wind turbine causes the electric generator to generate electricity. The generated electricity may be supplied to a power grid, or a portion of the generated electricity may be used to power a heat pump also supported at least in part by the superstructure to extract heat from the ocean or another large body of water. The heat may be stored in transportable thermal storage medium. Heat stored in the thermal storage media may be used at the system or remotely for regional or district heating and cooling, industrial purposes, or to generate electricity.
F03D 9/25 - Wind motors characterised by the driven apparatus the apparatus being an electrical generator
F03D 9/00 - Adaptations of wind motors for special useCombinations of wind motors with apparatus driven therebyWind motors specially adapted for installation in particular locations
F03D 9/28 - Wind motors characterised by the driven apparatus the apparatus being a pump or a compressor
6.
Electric machine stator cooling systems and methods
A stator for an electromagnetic machine having a plurality of electromagnets. Some or all of the electromagnets include a stack of laminations defining a tooth and a yoke segment, and an insulating bobbin surrounding a portion of the tooth of each lamination such that each lamination is held against adjacent laminations by the bobbin. The electromagnets also include electrically conductive windings surrounding a portion of the bobbin and a stator encapsulant fully encapsulating the bobbin and windings of the electromagnets.
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
H02K 3/44 - Protection against moisture or chemical attackWindings specially adapted for operation in liquid or gas
H02K 3/30 - Windings characterised by the insulating material
H02K 3/32 - Windings characterised by the shape, form or construction of the insulation
H02K 5/18 - Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 9/08 - Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
H02K 11/25 - Devices for sensing temperature, or actuated thereby
H02K 1/12 - Stationary parts of the magnetic circuit
H02K 5/24 - CasingsEnclosuresSupports specially adapted for suppression or reduction of noise or vibrations
An electromagnet for an electric machine having a stack of laminations defining a tooth and a yoke segment, and an insulating bobbin surrounding a portion of the tooth of each lamination, such that each lamination is held against adjacent laminations by the bobbin. The disclosed electromagnets also have electrically conductive windings surrounding a portion of the bobbin; and an encapsulant fully encapsulating the bobbin and windings, wherein the encapsulant comprises a dielectric material and an additive to increase the thermal conductivity of the encapsulant.
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
H02K 3/44 - Protection against moisture or chemical attackWindings specially adapted for operation in liquid or gas
H02K 3/30 - Windings characterised by the insulating material
H02K 3/32 - Windings characterised by the shape, form or construction of the insulation
H02K 5/18 - Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 9/08 - Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
H02K 11/25 - Devices for sensing temperature, or actuated thereby
H02K 1/12 - Stationary parts of the magnetic circuit
H02K 5/24 - CasingsEnclosuresSupports specially adapted for suppression or reduction of noise or vibrations
An electric machine having a rotor, stator and housing. The rotor includes a radially mounted array of permanent magnets and the stator includes a plurality of electromagnets radially positioned around the rotor. The machine includes a fluid circuit consisting of first and second cavities enclosed by the stator and positioned between the rotor and housing. The fluid circuit also includes an air gap between the stator and rotor and a plurality of ventilation channels extending through the rotor. The air gap and ventilation channels are in fluid communication with the first and second cavities. The rotor also includes an internal fan extending into the first or second cavity. When the rotor is caused to rotate with respect to the stator, the fan causes air or another fluid to circulate through the fluid circuit to cool the rotor.
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 9/08 - Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
Methods and apparatus for enhancing the robustness and stability of an electric machine having a rotor, stator and housing. The rotor includes a radially mounted array of permanent magnets and the stator includes a plurality of electromagnets radially positioned around the rotor. The rotor is stabilized by providing a first thermally conductive dielectric encapsulant in contact with adjacent permanent magnets. The stator is stabilized by providing a second thermally conductive dielectric encapsulant in contact with adjacent electromagnets.
H02K 1/12 - Stationary parts of the magnetic circuit
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
H02K 11/25 - Devices for sensing temperature, or actuated thereby
An electric machine having a rotor, stator and housing. The rotor includes a radially mounted array of permanent magnets and the stator includes a plurality of electromagnets radially positioned around the rotor. The machine includes a fluid circuit consisting of first and second cavities enclosed by the stator and positioned between the rotor and housing. The fluid circuit also includes an air gap between the stator and rotor and a plurality of ventilation channels extending through the rotor. The air gap and ventilation channels are in fluid communication with the first and second cavities. The rotor also includes an internal fan extending into the first or second cavity. When the rotor is caused to rotate with respect to the stator, the fan causes air or another fluid to circulate through the fluid circuit to cool the rotor.
H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 9/08 - Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
11.
Electric machine stator cooling systems and methods
An electric machine having a rotor, stator and housing. The rotor includes a radially mounted array of permanent magnets and the stator includes a plurality of electromagnets radially positioned around the rotor. The stator is encapsulated such that the stator encapsulant is in thermal contact with housing structures, for example the housing end plates. In some embodiments, the entire perimeter portion of the housing is in thermal contact with the stator or the stator encapsulant. The stator encapsulant provides for device robustness and thermal transfer from the stator to the housing. The thermal conductivity of the encapsulant may be enhanced by mixing an additive to the encapsulant to increase thermal conductivity.
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
H02K 3/44 - Protection against moisture or chemical attackWindings specially adapted for operation in liquid or gas
H02K 3/30 - Windings characterised by the insulating material
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 3/32 - Windings characterised by the shape, form or construction of the insulation
patents
