WO2011156142A2 - Electric machine cooling system and method - Google Patents
Electric machine cooling system and method Download PDFInfo
- Publication number
- WO2011156142A2 WO2011156142A2 PCT/US2011/038061 US2011038061W WO2011156142A2 WO 2011156142 A2 WO2011156142 A2 WO 2011156142A2 US 2011038061 W US2011038061 W US 2011038061W WO 2011156142 A2 WO2011156142 A2 WO 2011156142A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electric machine
- coolant
- rotor
- end turns
- agitator
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/16—Centering rotors within the stator; Balancing rotors
- H02K15/165—Balancing the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
- B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/90—Vehicles comprising electric prime movers
- B60Y2200/92—Hybrid vehicles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
Definitions
- Hybrid vehicles offer an opportunity for vehicle drivers to engage in environmentally-conscious behavior because of hybrids' improved fuel economy and reduced emissions.
- Hybrid vehicles combine traditional internal combustion engines with an electro-mechanical transmission. Electric motors located within the electro-mechanical transmission provide energy to propel the vehicle, reducing the need for energy provided by the internal combustion engine, thereby increasing fuel economy and reducing emissions.
- the hybrid transmission's electric motor rejects some energy in the form of heat. Efficient removal of heat from the electric motor can improve the lifespan of the electric machine as well as improve the electric machine's operating efficiency.
- the electric machine module can include an electric machine including a rotor with generally opposing end faces and a stator with stator end turns.
- the electric machine module can also include an agitator member operatively coupled to the rotor adjacent the generally opposing end faces and extending substantially outward along at least a portion of an axial length of the stator end turns.
- Some embodiments of the invention provide a method for cooling an electric machine.
- the method can include providing the electric machine including a rotor with generally opposing end faces and a stator substantially circumscribing the rotor and including stator end turns.
- the method can also include substantially enclosing at least a portion of the electric machine within a housing and defining at least a portion of a machine cavity with an inner wall of the housing.
- the method can further include introducing a coolant into the machine cavity, directing the coolant toward the stator end turns, and returning a portion of the coolant which flows past the stator end turns back toward the stator end turns for cooling using a rotating agitator member operatively coupled to the rotor near the generally opposing end faces.
- FIG. 1 is a cross-sectional view of an electric machine module according to one embodiment of the invention.
- FIG. 2 is a partial cross-sectional view of an electric machine with an agitator member, according to one embodiment of the invention.
- FIG. 3 is another cross-sectional view of the electric machine module according to one embodiment of the invention.
- FIG. 4 is a perspective view of a portion of the electric machine of FIG. 2.
- FIG. 5 is a partial perspective view of a portion of the electric machine of FIG. 2.
- FIG. 6 is a cross-sectional view of the electric machine of FIG. 2.
- FIG. 7 A is a cross-sectional view of an electric machine module according to another embodiment of the invention.
- FIG. 7B is a cross-sectional view of an electric machine module according to yet another embodiment of the invention. DETAILED DESCRIPTION
- FIG. 1 illustrates an electric machine module 10 according to one embodiment of the invention.
- the machine module 10 can include an electric machine 12 and a housing 14.
- the electric machine 12 can be disposed within a machine cavity 16 defined at least partially by an inner wall 18 of the housing 14.
- the electric machine 12 can include a rotor 20, a stator 22 substantially circumscribing the rotor 20, stator end turns 24, and bearings 26, and can be disposed about a main output shaft 28.
- the electric machine 12 can also include a rotor hub 30 or can have a "hub-less" design (not shown).
- the electric machine 12 can be, without limitation, an electric motor, such as a hybrid electric motor, an electric generator, or a vehicle alternator.
- the electric machine 12 can be an induction belt-alternator-starter (BAS).
- the electric machine 12 can be a High Voltage Hairpin (HVH) electric motor for use in a hybrid vehicle.
- HVH High Voltage Hairpin
- Components of the electric machine 12 such as, but not limited to, the stator end turns 24, the rotor 20, and the rotor hub 30 can generate heat during operation of the electric machine 12. These components can be cooled to enhance the performance of and increase the lifespan of the electric machine 12.
- the rotor 20 can include generally opposing end faces 32, 34.
- a balance ring 36 can be coupled to the rotor 20 and/or the rotor hub 30 at a location proximal to the generally opposing end faces 32, 34.
- the balance ring 36 can be coupled to the rotor hub 30 using threads, a plurality of threaded fasteners, a friction fitting, welding, or another conventional coupling manner so that the balance ring 36 can rotate substantially synchronously with the rotor 20 and the rotor hub 30 during operation of the electric motor 12.
- the balance ring 36 can be "staked" to a lip 35 on an inner diameter of the rotor hub 30 and a portion of the balance ring 36 can be heat pressed to a lamination stack of the rotor 20 (e.g., for axial support), as shown in FIG. 3. Additional components, such as steel insert pieces, can also be used to help clamp the balance ring 36 to the rotor hub 30 around the lip 35.
- the balance ring 36 can extend axially from the rotor hub 30 into the machine cavity 16 and can provide stability for the rotor 20 and rotor hub 30 during operation of the electric machine 12.
- the balance ring 36 comprises cast aluminum.
- the balance ring 36 can be coupled to the rotor 20 proximal to the generally opposing end faces 32, 34, as shown in FIG. 2.
- the balance ring 36 can be coupled to the rotor 20 using threads, a plurality of threaded fasteners, a friction fitting, welding, or another conventional coupling manner so that the balance ring 36 can rotate substantially synchronously with the rotor 20 during operation of the electric motor 12.
- the balance ring 36 can provide stability for the rotor 20 during operation of the electric machine 12.
- the balance ring 36 can be operatively coupled to the rotor 20 (i.e., through direct coupling or coupling via the rotor hub 30) due to the fact that it can rotate with the rotor 20 during operation of the electric machine.
- an agitator member 38 can be a ring-shaped member coupled to the rotor 20, the rotor hub 30, and/or the balance ring 36 proximal to the generally opposing end faces 32, 34. More specifically, at least a portion of the agitator member 38 can be coupled to the rotor 20, the rotor hub 30 and/or the balance ring 36 such that the agitator member 38 synchronously rotates with the rotor 20 and the rotor hub 30 when the electric machine 12 is in operation.
- the agitator member 38 can be coupled to the rotor 20, the rotor hub 30, and/or the balance ring 36 using threads, one or more threaded fasteners, a friction fitting, welding, or another conventional coupling manner.
- the agitator member 38 can be staked to a lip (not shown) on the inner diameter of the rotor hub 20 and further axial support can be provided by heat pressing a portion of the agitator member 34 in a lamination stack surrounding the rotor 20.
- the agitator member 38 can be cast as part of the rotor 20 during rotor fabrication so that the agitator member 38 and the rotor 20 are integral.
- the agitator member 38 can be integral with the balance ring 36. The agitator member 38 can extend axially away from the rotor 20 and/or the rotor hub 30 into the machine cavity 16.
- the agitator member 38 can be coupled to the rotor 20 and/or the rotor hub 30 with or without the balance ring 36. If the balance ring 36 is present, an axial length of the agitator member 38 can be substantially equal to or longer than an axial length of the balance ring 36. For example, in one embodiment, at least a portion of the agitator member 38 can extend axially past the balance ring 36 (i.e., axially away from the rotor 20). In addition, the agitator member 38 can extend substantially parallel to the stator end turns 24 along at least a portion of an axial length of the stator end turns 24.
- the agitator member 38 can extend substantially axially outward about as far as the stator end turns 24. In other embodiments, the axial length of the agitator member 38 can be shorter than or longer than the axial length of the stator end turns 24.
- the agitator member 38 can be operatively coupled to the rotor 20 (i.e., through direct coupling or coupling via the rotor hub 30 or the balance ring 36) due to the fact that it can rotate with the rotor 20 during operation of the electric machine.
- the agitator member 38 and the balance ring 36 can be an integral structure, as described above.
- the balance ring 36 and the agitator member 38 can comprise two or more independent components.
- the balance ring 36 and the agitator member 38 can be fabricated from aluminum, steel, stainless steel, or other similar materials.
- the agitator member 38 can be oriented so that it extends substantially parallel to an axis of rotation 40 of the rotor 20. In other embodiments, the agitator member 38 can be oriented in either a positive or negative direction relative to the rotor's axis of rotation 40.
- the agitator member 38 can include a radially distal surface 42 and a radially proximal surface 44.
- the radial location of a both the radially distal surface 42 and the radially proximal surface 44 can vary.
- the radially distal surface 42 can have a shorter radius than the rotor 20 (e.g., by a length "x", as shown in FIG. 4) or can have a radius equal to a radius of the rotor 20 (as shown in FIG. 2).
- the radially distal surface 42 can have a shorter radius than the radius of the rotor 20 to provide substantial radial separation between an underside of the stator end turns 24 and the agitator member 38.
- a plurality of struts 46 can provide support for the agitator member 38.
- the plurality of struts 46 can be cast or otherwise formed in the agitator member 38 so that the struts 46 and the agitator member 38 are a unitary body.
- at least a portion of the housing 14 can include a plurality of coolant apertures 48.
- the coolant apertures 48 can be in fluid communication with, for example, a coolant jacket 50 located substantially around the electric machine 12 (e.g., within an inner wall of the housing 14 or along the outside or inside of the housing 14 substantially surrounding an outer diameter of the stator 22) and the machine cavity 16.
- a coolant such as transmission fluid, ethylene glycol, an ethylene glycol / water mixture, water, oil, or a similar substance, can originate from a fluid source (not shown), flow throughout the coolant jacket 50, and can be dispersed through the coolant apertures 48 into the machine cavity 16.
- the coolant apertures 48 can be positioned so that the coolant can be dispersed onto the stator end turns 24, as shown in FIG. 2. After reaching the stator end turns 24, the coolant can receive heat energy from the stator end turns 24, which can result in cooling of the electric machine 12. Some of the coolant can be dispersed past the stator end turns 24 or, for example, splash or drip from the stator end turns 24 onto the radially distal surface 42 of the agitator member 38. In addition, some of the coolant that comes in contact with the stator end turns 24 can continue to flow toward the radially distal surface 42.
- the coolant can be substantially radially slung back outward on to the stator end turns 24 due to the rotation of the agitator member 38 in synchronicity with the rotor 20.
- the process of radially slinging the coolant toward the stator end turns 24 can serve to recycle the coolant, and thus, maximize cooling potential of the coolant.
- the process of radially slinging the coolant back toward the stator end turns 24 using the agitator member 38 can be considered a "multiple-pass" method of cooling, as the coolant can reach the stator end turns 24 multiple times to provide additional cooling.
- Conventional electric machines use a "single-pass" method of cooling where the coolant only reaches the stator end turns 24 once and then is discharged away from the electric machine 12 without further cooling benefits.
- the single-pass method only permits the coolant to reach radially outer surfaces of the stator ends turns 24, whereas the multiple-pass method allows coolant to be slung back towards radially inner surfaces of the stator end turns 24.
- the multiple-pass cooling method allows the coolant to reach both the radially outer surface as well as the radially inner surface of the stator end turns 24, and thus, provides enhanced cooling.
- the radially distal surface 42 can include a textured surface 52.
- the textured surface 52 can have different textures such as scalloping, ribbing, ridging, etc.
- the textured surface 52 can be asymmetric in shape to increase the force with which the coolant is slung.
- the radially distal surface 42 can lack texture and can include a substantially planar or smooth surface.
- the agitator member 38 can enhance radial slinging of the coolant because it provides more surface area to receive the coolant. Also, because the agitator member 34 can synchronously rotate with the rotor 20 and/or the rotor hub 30, centrifugal force can force the coolant away from the agitator member 38 so that the coolant can be dispersed onto the stator end turns 24. In one embodiment, the amount and shape of texturing on the textured surface 52 can be selected to provide a desired amount of cooling without slinging the coolant at velocities which can possibly erode the stator end turns 24.
- the agitator member 38 can further increase air circulation within the machine cavity 16, and thus, enhance electric machine cooling, because its larger mass, relative to a balance ring alone, can displace more air when the agitator member 38 is in motion.
- the textured surface 52 can be shaped similar to pump or fan vanes to help increase air circulation and/or increase radial slinging of the coolant.
- the agitator member 38 can include a plurality of agitator channels 54. As shown in FIGS. 2 and 5, the agitator channels 54 can extend radially through the agitator member 38. The plurality of agitator channels 54 can extend through any desired radial length of the agitator member 38, such as a full length of the agitator member 34 or a portion of the full length of the agitator member 38. The agitator channels 54 can be positioned at nearly any distance along the axial length of the agitator member 38 (e.g., more proximal to the rotor 20, centrally along the axial length, or more distal from the rotor 20). For example, as shown in FIG.
- the plurality of agitator channels 54 can be positioned axially distal from the rotor 20.
- the location of each of the plurality of agitator channels 54 can be symmetric or asymmetric along the agitator member 38 (i.e., not each agitator channel may be positioned at the same distance along the axial length of the agitator member 38).
- any number of agitator channels 54 can be included in the agitator member 38, or in attachments to the agitator member 38.
- each of the plurality of agitator channels 54 can be circular in shape.
- the agitator channels 54 can have similar or different shapes, including circular, square, rectangle, oval, and/or other shapes.
- the plurality of agitator channels 54 can include similar or varying radii or diameters.
- the agitator channels 54 can be of sufficient size to allow passage of a portion of the coolant through the agitator channels 54, as described below.
- the agitator channels 54 can be sized and positioned so that another portion of the coolant that reaches the agitator member 38 can continue to be substantially radially slung toward the stator end turns 24.
- an additional volume of the coolant also can be expelled near the rotor hub 30, for example, from a base of the rotor hub 30 or from the main input shaft 28.
- the coolant expelled near the rotor hub 30 can flow radially outward toward the housing 12 (e.g., due to centrifugal force).
- a portion of the coolant can reach the radially proximal surface 44 of the agitator member 38, and the agitator channels 54 can provide a pathway for the coolant to flow between the radially proximal surface and the radially distal surface.
- the coolant 50 flowing radially outward onto the agitator member 38 can flow through the agitator channels 54 so that it reaches the radially distal surface 42 and is substantially radially slung toward the stator end turns 24, or at least concentrated near the stator end turns 24.
- the additional volume of coolant can further aid in cooling the electric machine 12, including the stator end turns 24.
- FIGS. 7A and 7B illustrate the electric machine module 10 according to another embodiment of the invention.
- a cover 56 can be coupled to the inner wall 18 and at least partially surround the stator end turns 24 so that the cover 56 and each of the stator end turns 24 define a stator cavity 58 around the stator end turns 24.
- the stator cavity 58 can be in fluid communication with the machine cavity 16.
- the cover 56 can also substantially surround the stator 22.
- FIG. 7A illustrates the cover entirely surrounding the stator 22 as well as partially surrounding the stator end turns 24 (e.g., as an integral stator housing ring and cover assembly).
- additional caps can enclose the cover 56 within the housing 14.
- the cover 56 can be a part of the housing 14 (e.g., extending from the inner wall 18 on either end of the stator 22 to partially surround the stator end turns 24).
- the cover 56 can extend a desired radial distance from the inner wall 18 and, in some embodiments, can turn back inward axially, as shown in FIGS. 7 A and 7B.
- the cover 56 can also be positioned a desired axial distance from the housing 14.
- the desired distances can be uniform or vary along radial portions of, or along the circumference of, the electric machine 12 and, as a result, the stator cavity 58 can be uniform or vary in size along the radial portions.
- the stator cavity 58 may not extend around the entire 360 degrees of the stator end turns 24 (i.e., some radial portions of the stator end turns 24 are not surrounded by the cover 56).
- the cover 56 can comprise plastic, aluminum, steel, a polymeric material, or a similar material.
- the size of the stator cavity 58 can vary depending on the dielectric properties of the coolant and the materials from which the cover 56 are fabricated or depending on its radial position within the electric machine module 10.
- the size of the stator cavity 58 can be reduced by coating an area of the cover 56 closest to the stator end turns 24 with a material of high dielectric strength, such as an epoxy material 60, as shown in FIG. 3.
- an upper portion of the electric machine module 10 can include a substantially larger stator cavity 58 than a lower portion of the electric machine module 10.
- the cover 56 can be coupled to the inner wall 18 by press fitting, friction fitting, threaded fasteners, or a similar coupling manner.
- the cover 56 can comprise one or more parts, where some parts of the cover 56 are integral with the inner wall 18 and other parts of the cover are coupled to the inner wall 18.
- the stator cavity 58 can receive the coolant from the cooling jacket 50 and the coolant apertures 48 (similar to that shown in FIG. 2), or from a cooling jacket 59 formed between the cover 56 and the inner wall 18 through coolant apertures 61 of the cover 56.
- the cooling jacket 59 can receive the coolant from a feed port 62, as shown in FIGS. 6-7B, in fluid communication with the fluid source.
- the cover 56 can help concentrate the flowing coolant within the stator cavity 52 so that the coolant can remain in contact with or near the stator end turns 24 for a prolonged time period in order to help transfer more heat energy.
- the coolant can eventually disperse out of the stator cavity 58 toward the machine cavity 16.
- the cover 56 can greatly enhance cooling of the stator end turns 24 because the cover 56 can prevent at least some of the coolant from quickly dispersing away from the stator end turns 24 and can help concentrate the coolant near the heat energy-radiating stator end turns 24.
- the stator cavity 58 can be defined by the cover 56 and the stator end turns 24 as well as the agitator member 38.
- the stator cavity 58 can be in fluid communication with the machine cavity 16, as described above.
- the coolant enters the stator cavity 58, the coolant can flow onto the stator end turns 24 and can be concentrated within the stator cavity 58 by the presence of the cover 56.
- the coolant flows toward the agitator member 38, it can be radially slung back toward the stator end turns 24 and the cover 56 where it can once again become concentrated around the stator end turns 24.
- the combination of the cover 56 and the agitator member 38 can synergistically improve cooling efficiency by applying and recycling the coolant near and around the stator end turns 24.
- stator cavity 58 can be in fluid communication with the machine cavity 16 in some embodiments, some of the coolant can flow into the machine cavity 16 while a significant portion of the coolant can remain within the stator cavity 58.
- further cooling can be achieved using an additional volume of coolant expelled from near the rotor hub 30.
- the additional volume of coolant can flow radially outward, through some of the plurality of agitator channels 52, and toward the stator cavity 58 so that it can be applied and reapplied to the stator end turns 24.
- the additional flow of coolant can lead to more efficient heat energy transfer because of exchange of the coolant and repeated recycling of the coolant near the stator end turns 24.
- the coolant can pool at or near a bottom portion of the housing 12 (e.g., by flowing in the machine cavity 16 outside of the cover 56 or through drain ports 64 of the cover 56).
- a drain (not shown) can be located at or near the bottom portion in order permit removal of pooling coolant from the housing 12.
- the drain can be coupled to an element which can remove the heat energy from the drained coolant, such as a radiator or other suitable heat exchanger, so that it can be circulated back to the fluid source.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Cooling System (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Embodiments of the invention provide an electric machine module and a method for cooling an electric machine. The apparatus and method include providing the electric machine including a rotor and a stator with stator end turns and enclosing at least a portion of the electric machine within a housing. The method also includes introducing a coolant into a machine cavity, directing the coolant toward the stator end turns, and returning a portion of the coolant which flows past the stator end turns back toward the stator end turns using a rotating agitator member operatively coupled to the rotor.
Description
ELECTRIC MACHINE COOLING SYSTEM AND METHOD RELATED APPLICATIONS
[0001] This international application claims priority to U.S. Patent Application Serial No. 12/796,563 filed 8 June 2010 entitled "Electric Machine Cooling System and Method," the disclosure of which is incorporated herein by reference in its entirety.
BACKGROUND/RELATED APPLICATIONS
[0002] Hybrid vehicles offer an opportunity for vehicle drivers to engage in environmentally-conscious behavior because of hybrids' improved fuel economy and reduced emissions. Hybrid vehicles combine traditional internal combustion engines with an electro-mechanical transmission. Electric motors located within the electro-mechanical transmission provide energy to propel the vehicle, reducing the need for energy provided by the internal combustion engine, thereby increasing fuel economy and reducing emissions.
[0003] As with any electric machine, the hybrid transmission's electric motor rejects some energy in the form of heat. Efficient removal of heat from the electric motor can improve the lifespan of the electric machine as well as improve the electric machine's operating efficiency.
SUMMARY
[0004] Some embodiments of the invention provide an electric machine module capable of being cooled by a coolant. The electric machine module can include an electric machine including a rotor with generally opposing end faces and a stator with stator end turns. The electric machine module can also include an agitator member operatively coupled to the rotor adjacent the generally opposing end faces and extending substantially outward along at least a portion of an axial length of the stator end turns.
[0005] Some embodiments of the invention provide a method for cooling an electric machine. The method can include providing the electric machine including a rotor with generally opposing end faces and a stator substantially circumscribing the rotor and including stator end turns. The method can also include substantially enclosing at least a
portion of the electric machine within a housing and defining at least a portion of a machine cavity with an inner wall of the housing. The method can further include introducing a coolant into the machine cavity, directing the coolant toward the stator end turns, and returning a portion of the coolant which flows past the stator end turns back toward the stator end turns for cooling using a rotating agitator member operatively coupled to the rotor near the generally opposing end faces.
DESCRIPTION OF THE DRAWINGS
[0006] FIG. 1 is a cross-sectional view of an electric machine module according to one embodiment of the invention.
[0007] FIG. 2 is a partial cross-sectional view of an electric machine with an agitator member, according to one embodiment of the invention.
[0008] FIG. 3 is another cross-sectional view of the electric machine module according to one embodiment of the invention.
[0009] FIG. 4 is a perspective view of a portion of the electric machine of FIG. 2.
[0010] FIG. 5 is a partial perspective view of a portion of the electric machine of FIG. 2.
[0011] FIG. 6 is a cross-sectional view of the electric machine of FIG. 2.
[0012] FIG. 7 A is a cross-sectional view of an electric machine module according to another embodiment of the invention.
[0013] FIG. 7B is a cross-sectional view of an electric machine module according to yet another embodiment of the invention.
DETAILED DESCRIPTION
[0014] Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings.
[0015] The following discussion is presented to enable a person skilled in the art to make and use embodiments of the invention. Various modifications to the illustrated embodiments will be readily apparent to those skilled in the art, and the generic principles herein can be applied to other embodiments and applications without departing from embodiments of the invention. Thus, embodiments of the invention are not intended to be limited to embodiments shown, but are to be accorded the widest scope consistent with the principles and features disclosed herein. The following detailed description is to be read with reference to the figures, in which like elements in different figures have like reference numerals. The figures, which are not necessarily to scale, depict selected embodiments and are not intended to limit the scope of embodiments of the invention. Skilled artisans will recognize the examples provided herein have many useful alternatives and fall within the scope of embodiments of the invention.
[0016] FIG. 1 illustrates an electric machine module 10 according to one embodiment of the invention. The machine module 10 can include an electric machine 12 and a housing 14. The electric machine 12 can be disposed within a machine cavity 16 defined at least partially by an inner wall 18 of the housing 14. The electric machine 12 can include a rotor 20, a
stator 22 substantially circumscribing the rotor 20, stator end turns 24, and bearings 26, and can be disposed about a main output shaft 28. In some embodiments, the electric machine 12 can also include a rotor hub 30 or can have a "hub-less" design (not shown).
[0017] The electric machine 12 can be, without limitation, an electric motor, such as a hybrid electric motor, an electric generator, or a vehicle alternator. In one embodiment, the electric machine 12 can be an induction belt-alternator-starter (BAS). In another embodiment, the electric machine 12 can be a High Voltage Hairpin (HVH) electric motor for use in a hybrid vehicle.
[0018] Components of the electric machine 12 such as, but not limited to, the stator end turns 24, the rotor 20, and the rotor hub 30 can generate heat during operation of the electric machine 12. These components can be cooled to enhance the performance of and increase the lifespan of the electric machine 12.
[0019] As shown in FIG. 1, the rotor 20 can include generally opposing end faces 32, 34. A balance ring 36 can be coupled to the rotor 20 and/or the rotor hub 30 at a location proximal to the generally opposing end faces 32, 34. In some embodiments, the balance ring 36 can be coupled to the rotor hub 30 using threads, a plurality of threaded fasteners, a friction fitting, welding, or another conventional coupling manner so that the balance ring 36 can rotate substantially synchronously with the rotor 20 and the rotor hub 30 during operation of the electric motor 12. In addition, the balance ring 36 can be "staked" to a lip 35 on an inner diameter of the rotor hub 30 and a portion of the balance ring 36 can be heat pressed to a lamination stack of the rotor 20 (e.g., for axial support), as shown in FIG. 3. Additional components, such as steel insert pieces, can also be used to help clamp the balance ring 36 to the rotor hub 30 around the lip 35. The balance ring 36 can extend axially from the rotor hub 30 into the machine cavity 16 and can provide stability for the rotor 20 and rotor hub 30 during operation of the electric machine 12. In one embodiment, the balance ring 36 comprises cast aluminum.
[0020] In other embodiments, such as those including the hub-less design, the balance ring 36 can be coupled to the rotor 20 proximal to the generally opposing end faces 32, 34, as shown in FIG. 2. The balance ring 36 can be coupled to the rotor 20 using threads, a
plurality of threaded fasteners, a friction fitting, welding, or another conventional coupling manner so that the balance ring 36 can rotate substantially synchronously with the rotor 20 during operation of the electric motor 12. The balance ring 36 can provide stability for the rotor 20 during operation of the electric machine 12. In either the hub-less design or embodiments including the rotor hub 30, the balance ring 36 can be operatively coupled to the rotor 20 (i.e., through direct coupling or coupling via the rotor hub 30) due to the fact that it can rotate with the rotor 20 during operation of the electric machine.
[0021] In some embodiments, an agitator member 38 can be a ring-shaped member coupled to the rotor 20, the rotor hub 30, and/or the balance ring 36 proximal to the generally opposing end faces 32, 34. More specifically, at least a portion of the agitator member 38 can be coupled to the rotor 20, the rotor hub 30 and/or the balance ring 36 such that the agitator member 38 synchronously rotates with the rotor 20 and the rotor hub 30 when the electric machine 12 is in operation. The agitator member 38 can be coupled to the rotor 20, the rotor hub 30, and/or the balance ring 36 using threads, one or more threaded fasteners, a friction fitting, welding, or another conventional coupling manner. In one embodiment, the agitator member 38 can be staked to a lip (not shown) on the inner diameter of the rotor hub 20 and further axial support can be provided by heat pressing a portion of the agitator member 34 in a lamination stack surrounding the rotor 20. In another embodiment, the agitator member 38 can be cast as part of the rotor 20 during rotor fabrication so that the agitator member 38 and the rotor 20 are integral. In yet another embodiment, the agitator member 38 can be integral with the balance ring 36. The agitator member 38 can extend axially away from the rotor 20 and/or the rotor hub 30 into the machine cavity 16.
[0022] In some embodiments, the agitator member 38 can be coupled to the rotor 20 and/or the rotor hub 30 with or without the balance ring 36. If the balance ring 36 is present, an axial length of the agitator member 38 can be substantially equal to or longer than an axial length of the balance ring 36. For example, in one embodiment, at least a portion of the agitator member 38 can extend axially past the balance ring 36 (i.e., axially away from the rotor 20). In addition, the agitator member 38 can extend substantially parallel to the stator end turns 24 along at least a portion of an axial length of the stator end turns 24. In
some embodiments, the agitator member 38 can extend substantially axially outward about as far as the stator end turns 24. In other embodiments, the axial length of the agitator member 38 can be shorter than or longer than the axial length of the stator end turns 24.
[0023] In either the hub-less design or embodiments including the rotor hub 30, the agitator member 38 can be operatively coupled to the rotor 20 (i.e., through direct coupling or coupling via the rotor hub 30 or the balance ring 36) due to the fact that it can rotate with the rotor 20 during operation of the electric machine.
[0024] In some embodiments, the agitator member 38 and the balance ring 36 can be an integral structure, as described above. In other embodiments, the balance ring 36 and the agitator member 38 can comprise two or more independent components. The balance ring 36 and the agitator member 38 can be fabricated from aluminum, steel, stainless steel, or other similar materials. In some embodiments, the agitator member 38 can be oriented so that it extends substantially parallel to an axis of rotation 40 of the rotor 20. In other embodiments, the agitator member 38 can be oriented in either a positive or negative direction relative to the rotor's axis of rotation 40.
[0025] In addition, the agitator member 38 can include a radially distal surface 42 and a radially proximal surface 44. The radial location of a both the radially distal surface 42 and the radially proximal surface 44 can vary. For example, the radially distal surface 42 can have a shorter radius than the rotor 20 (e.g., by a length "x", as shown in FIG. 4) or can have a radius equal to a radius of the rotor 20 (as shown in FIG. 2). In some embodiments, the radially distal surface 42 can have a shorter radius than the radius of the rotor 20 to provide substantial radial separation between an underside of the stator end turns 24 and the agitator member 38.
[0026] In some embodiments, as shown in to FIG. 4, a plurality of struts 46 can provide support for the agitator member 38. The plurality of struts 46 can be cast or otherwise formed in the agitator member 38 so that the struts 46 and the agitator member 38 are a unitary body.
[0027] In some embodiments, at least a portion of the housing 14 can include a plurality of coolant apertures 48. The coolant apertures 48 can be in fluid communication with, for example, a coolant jacket 50 located substantially around the electric machine 12 (e.g., within an inner wall of the housing 14 or along the outside or inside of the housing 14 substantially surrounding an outer diameter of the stator 22) and the machine cavity 16. A coolant, such as transmission fluid, ethylene glycol, an ethylene glycol / water mixture, water, oil, or a similar substance, can originate from a fluid source (not shown), flow throughout the coolant jacket 50, and can be dispersed through the coolant apertures 48 into the machine cavity 16.
[0028] In one embodiment, the coolant apertures 48 can be positioned so that the coolant can be dispersed onto the stator end turns 24, as shown in FIG. 2. After reaching the stator end turns 24, the coolant can receive heat energy from the stator end turns 24, which can result in cooling of the electric machine 12. Some of the coolant can be dispersed past the stator end turns 24 or, for example, splash or drip from the stator end turns 24 onto the radially distal surface 42 of the agitator member 38. In addition, some of the coolant that comes in contact with the stator end turns 24 can continue to flow toward the radially distal surface 42. As the coolant reaches the radially distal surface 42, the coolant can be substantially radially slung back outward on to the stator end turns 24 due to the rotation of the agitator member 38 in synchronicity with the rotor 20. The process of radially slinging the coolant toward the stator end turns 24 can serve to recycle the coolant, and thus, maximize cooling potential of the coolant.
[0029] In some embodiments, the process of radially slinging the coolant back toward the stator end turns 24 using the agitator member 38 can be considered a "multiple-pass" method of cooling, as the coolant can reach the stator end turns 24 multiple times to provide additional cooling. Conventional electric machines use a "single-pass" method of cooling where the coolant only reaches the stator end turns 24 once and then is discharged away from the electric machine 12 without further cooling benefits. In addition, the single-pass method only permits the coolant to reach radially outer surfaces of the stator ends turns 24, whereas the multiple-pass method allows coolant to be slung back towards radially inner surfaces of the stator end turns 24. As a result, the multiple-pass cooling method allows the
coolant to reach both the radially outer surface as well as the radially inner surface of the stator end turns 24, and thus, provides enhanced cooling.
[0030] In one embodiment, as shown in FIGS. 4, 5, and 6, the radially distal surface 42 can include a textured surface 52. The textured surface 52 can have different textures such as scalloping, ribbing, ridging, etc. In some embodiments, the textured surface 52 can be asymmetric in shape to increase the force with which the coolant is slung. In another embodiment, the radially distal surface 42 can lack texture and can include a substantially planar or smooth surface.
[0031] In comparison to conventional balance rings, the agitator member 38, including the textured surface 52 or the substantially planar surface, can enhance radial slinging of the coolant because it provides more surface area to receive the coolant. Also, because the agitator member 34 can synchronously rotate with the rotor 20 and/or the rotor hub 30, centrifugal force can force the coolant away from the agitator member 38 so that the coolant can be dispersed onto the stator end turns 24. In one embodiment, the amount and shape of texturing on the textured surface 52 can be selected to provide a desired amount of cooling without slinging the coolant at velocities which can possibly erode the stator end turns 24. In addition, compared to conventional balance rings, the agitator member 38 can further increase air circulation within the machine cavity 16, and thus, enhance electric machine cooling, because its larger mass, relative to a balance ring alone, can displace more air when the agitator member 38 is in motion. In one embodiment, the textured surface 52 can be shaped similar to pump or fan vanes to help increase air circulation and/or increase radial slinging of the coolant.
[0032] In some embodiments, the agitator member 38 can include a plurality of agitator channels 54. As shown in FIGS. 2 and 5, the agitator channels 54 can extend radially through the agitator member 38. The plurality of agitator channels 54 can extend through any desired radial length of the agitator member 38, such as a full length of the agitator member 34 or a portion of the full length of the agitator member 38. The agitator channels 54 can be positioned at nearly any distance along the axial length of the agitator member 38 (e.g., more proximal to the rotor 20, centrally along the axial length, or more distal from the
rotor 20). For example, as shown in FIG. 5, the plurality of agitator channels 54 can be positioned axially distal from the rotor 20. The location of each of the plurality of agitator channels 54 can be symmetric or asymmetric along the agitator member 38 (i.e., not each agitator channel may be positioned at the same distance along the axial length of the agitator member 38).
[0033] Additionally, any number of agitator channels 54 can be included in the agitator member 38, or in attachments to the agitator member 38. In some embodiments, as shown in FIG. 5, each of the plurality of agitator channels 54 can be circular in shape. In other embodiments, the agitator channels 54 can have similar or different shapes, including circular, square, rectangle, oval, and/or other shapes. Also, the plurality of agitator channels 54 can include similar or varying radii or diameters. The agitator channels 54 can be of sufficient size to allow passage of a portion of the coolant through the agitator channels 54, as described below. The agitator channels 54 can be sized and positioned so that another portion of the coolant that reaches the agitator member 38 can continue to be substantially radially slung toward the stator end turns 24.
[0034] In some embodiments, an additional volume of the coolant also can be expelled near the rotor hub 30, for example, from a base of the rotor hub 30 or from the main input shaft 28. The coolant expelled near the rotor hub 30 can flow radially outward toward the housing 12 (e.g., due to centrifugal force). A portion of the coolant can reach the radially proximal surface 44 of the agitator member 38, and the agitator channels 54 can provide a pathway for the coolant to flow between the radially proximal surface and the radially distal surface. More specifically, the coolant 50 flowing radially outward onto the agitator member 38 can flow through the agitator channels 54 so that it reaches the radially distal surface 42 and is substantially radially slung toward the stator end turns 24, or at least concentrated near the stator end turns 24. The additional volume of coolant can further aid in cooling the electric machine 12, including the stator end turns 24.
[0035] FIGS. 7A and 7B illustrate the electric machine module 10 according to another embodiment of the invention. As shown in FIG. 7A, a cover 56 can be coupled to the inner wall 18 and at least partially surround the stator end turns 24 so that the cover 56 and each of
the stator end turns 24 define a stator cavity 58 around the stator end turns 24. The stator cavity 58 can be in fluid communication with the machine cavity 16. The cover 56 can also substantially surround the stator 22. For example, FIG. 7A illustrates the cover entirely surrounding the stator 22 as well as partially surrounding the stator end turns 24 (e.g., as an integral stator housing ring and cover assembly). In some embodiments, additional caps (not shown) can enclose the cover 56 within the housing 14. In other embodiments, the cover 56 can be a part of the housing 14 (e.g., extending from the inner wall 18 on either end of the stator 22 to partially surround the stator end turns 24).
[0036] The cover 56 can extend a desired radial distance from the inner wall 18 and, in some embodiments, can turn back inward axially, as shown in FIGS. 7 A and 7B. The cover 56 can also be positioned a desired axial distance from the housing 14. The desired distances can be uniform or vary along radial portions of, or along the circumference of, the electric machine 12 and, as a result, the stator cavity 58 can be uniform or vary in size along the radial portions. In addition, in some embodiments, the stator cavity 58 may not extend around the entire 360 degrees of the stator end turns 24 (i.e., some radial portions of the stator end turns 24 are not surrounded by the cover 56).
[0037] The cover 56 can comprise plastic, aluminum, steel, a polymeric material, or a similar material. In some embodiments, the size of the stator cavity 58 can vary depending on the dielectric properties of the coolant and the materials from which the cover 56 are fabricated or depending on its radial position within the electric machine module 10. In one embodiment, the size of the stator cavity 58 can be reduced by coating an area of the cover 56 closest to the stator end turns 24 with a material of high dielectric strength, such as an epoxy material 60, as shown in FIG. 3. In another embodiment, an upper portion of the electric machine module 10 can include a substantially larger stator cavity 58 than a lower portion of the electric machine module 10.
[0038] In some embodiments, the cover 56 can be coupled to the inner wall 18 by press fitting, friction fitting, threaded fasteners, or a similar coupling manner. In addition, the cover 56 can comprise one or more parts, where some parts of the cover 56 are integral with the inner wall 18 and other parts of the cover are coupled to the inner wall 18. The stator
cavity 58 can receive the coolant from the cooling jacket 50 and the coolant apertures 48 (similar to that shown in FIG. 2), or from a cooling jacket 59 formed between the cover 56 and the inner wall 18 through coolant apertures 61 of the cover 56. The cooling jacket 59 can receive the coolant from a feed port 62, as shown in FIGS. 6-7B, in fluid communication with the fluid source. After the coolant flows into the stator cavity 58, the cover 56 can help concentrate the flowing coolant within the stator cavity 52 so that the coolant can remain in contact with or near the stator end turns 24 for a prolonged time period in order to help transfer more heat energy. The coolant can eventually disperse out of the stator cavity 58 toward the machine cavity 16. Compared to conventional cooling systems, the cover 56 can greatly enhance cooling of the stator end turns 24 because the cover 56 can prevent at least some of the coolant from quickly dispersing away from the stator end turns 24 and can help concentrate the coolant near the heat energy-radiating stator end turns 24.
[0039] In one embodiment, as shown in FIG. 7B, the stator cavity 58 can be defined by the cover 56 and the stator end turns 24 as well as the agitator member 38. The stator cavity 58 can be in fluid communication with the machine cavity 16, as described above. When the coolant enters the stator cavity 58, the coolant can flow onto the stator end turns 24 and can be concentrated within the stator cavity 58 by the presence of the cover 56. In addition, when the coolant flows toward the agitator member 38, it can be radially slung back toward the stator end turns 24 and the cover 56 where it can once again become concentrated around the stator end turns 24. The combination of the cover 56 and the agitator member 38 can synergistically improve cooling efficiency by applying and recycling the coolant near and around the stator end turns 24.
[0040] Because the stator cavity 58 can be in fluid communication with the machine cavity 16 in some embodiments, some of the coolant can flow into the machine cavity 16 while a significant portion of the coolant can remain within the stator cavity 58. In some embodiments, further cooling can be achieved using an additional volume of coolant expelled from near the rotor hub 30. The additional volume of coolant can flow radially outward, through some of the plurality of agitator channels 52, and toward the stator cavity 58 so that it can be applied and reapplied to the stator end turns 24. The additional flow of
coolant can lead to more efficient heat energy transfer because of exchange of the coolant and repeated recycling of the coolant near the stator end turns 24.
[0041] After flowing over the electric machine components, the coolant can pool at or near a bottom portion of the housing 12 (e.g., by flowing in the machine cavity 16 outside of the cover 56 or through drain ports 64 of the cover 56). A drain (not shown) can be located at or near the bottom portion in order permit removal of pooling coolant from the housing 12. The drain can be coupled to an element which can remove the heat energy from the drained coolant, such as a radiator or other suitable heat exchanger, so that it can be circulated back to the fluid source.
[0042] It will be appreciated by those skilled in the art that while the invention has been described above in connection with particular embodiments and examples, the invention is not necessarily so limited, and that numerous other embodiments, examples, uses, modifications and departures from the embodiments, examples and uses are intended to be encompassed by the claims attached hereto. The entire disclosure of each patent and publication cited herein is incorporated by reference, as if each such patent or publication were individually incorporated by reference herein. Various features and advantages of the invention are set forth in the following claims.
Claims
1. An electric machine module capable of being cooled by a coolant, the electric machine module comprising: an electric machine including a rotor with generally opposing end faces, and a stator with stator end turns; and an agitator member operatively coupled to the rotor adjacent the generally opposing end faces and extending substantially axially outward along at least a portion of an axial length of the stator end turns.
2. The electric machine module of claim 1, wherein the agitator member comprises a radially distal surface and a radially proximal surface, the radially distal surface comprising a textured surface.
3. The electric machine module of claim 1, wherein the electric machine further includes a rotor hub, and the agitator member is coupled to the rotor by the rotor hub.
4. The electric machine module of claim 1 and further comprising a balance ring operatively coupled to the rotor adjacent the generally opposing ends faces.
5. The electric machine module of claim 4, wherein the agitator member and the balance ring are integral and at least a portion of the agitator member extends axially past the balance ring away from the rotor.
6. The electric machine module of claim 5, wherein the agitator member includes a radially distal surface and a radially proximal surface, the radially distal surface comprising a textured surface.
7. The electric machine module of claim 6 and further comprising a plurality of agitator channels extending radially through the agitator ring.
8. The electric machine module of claim 7, wherein the plurality of agitator channels provide a pathway for the coolant to flow between the radially proximal surface and the radially distal surface.
9. The electric machine module of claim 1 and further comprising a housing substantially enclosing at least a portion of the electric machine within a machine cavity.
10. The electric machine module of claim 1, wherein an axial length of the agitator member is one of less than, more than, and substantially the same as the axial length of the stator end turns.
11. The electric machine module of claim 1 , wherein the agitator member rotates with the rotor during operation of the electric machine.
12. The electric machine module of claim 9 further comprising a housing substantially enclosing at least a portion of the electric machine within a machine cavity, wherein the coolant is circulated throughout the machine cavity and a portion of the coolant reaches the rotating agitator member, wherein the portion of the coolant reaching the rotating agitator member is slung radially toward the stator end turns.
13. The electric machine module of claim 1, wherein the agitator member is substantially ring-shaped.
14. The electric machine module of claim 1, wherein the agitator member is directly coupled to the rotor.
15. The electric machine module of claim 1, wherein an axial length of the agitator ring is oriented at one of a positive direction and a negative direction relative to an axis of rotation of the rotor.
16. The electric machine module of claim 1, wherein an axial length of the agitator ring is substantially parallel to an axis of rotation of the rotor.
17. A method for cooling an electric machine comprising: providing the electric machine including a rotor with generally opposing end faces, and a stator substantially circumscribing the rotor and including stator end turns; substantially enclosing at least a portion of the electric machine within a housing, defining at least a portion of a machine cavity with an inner wall of the housing; introducing a coolant into the machine cavity; directing the coolant toward the stator end turns; and returning a portion of the coolant which flows past the stator end turns back toward the stator end turns for cooling using a rotating agitator member operatively coupled to the rotor near the generally opposing end faces.
18. The method of claim 17 and further comprising concentrating the coolant near the stator end turns using the rotating agitator member.
19. The method of claim 17, wherein the coolant is directed toward the stator end turns via coolant apertures of the housing.
20. The method of claim 19, wherein the coolant is introduced into the machine cavity from a coolant jacket through the coolant apertures, wherein the coolant jacket is located substantially around the electric machine.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11792882.0A EP2580853A4 (en) | 2010-06-08 | 2011-05-26 | Electric machine cooling system and method |
KR1020137000382A KR101738208B1 (en) | 2010-06-08 | 2011-05-26 | Electrical machine cooling system and method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/796,563 US8519581B2 (en) | 2010-06-08 | 2010-06-08 | Electric machine cooling system and method |
US12/796,563 | 2010-06-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2011156142A2 true WO2011156142A2 (en) | 2011-12-15 |
WO2011156142A3 WO2011156142A3 (en) | 2012-04-19 |
Family
ID=45063915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2011/038061 WO2011156142A2 (en) | 2010-06-08 | 2011-05-26 | Electric machine cooling system and method |
Country Status (4)
Country | Link |
---|---|
US (1) | US8519581B2 (en) |
EP (1) | EP2580853A4 (en) |
KR (1) | KR101738208B1 (en) |
WO (1) | WO2011156142A2 (en) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5545180B2 (en) * | 2010-11-11 | 2014-07-09 | トヨタ自動車株式会社 | Rotating electric machine |
JP5541585B2 (en) * | 2010-12-28 | 2014-07-09 | 株式会社デンソー | Rotating electric machine |
JP5188593B2 (en) * | 2011-03-31 | 2013-04-24 | 株式会社小松製作所 | Generator motor cooling structure and generator motor |
US20130002067A1 (en) * | 2011-06-30 | 2013-01-03 | Bradfield Michael D | Electric Machine Module Cooling System and Method |
US10069375B2 (en) * | 2012-05-02 | 2018-09-04 | Borgwarner Inc. | Electric machine module cooling system and method |
US9006943B2 (en) | 2012-09-12 | 2015-04-14 | Remy Technologies, L.L.C. | Electro-dynamic machine with coolant chargeable bladder |
TWI590568B (en) * | 2013-12-31 | 2017-07-01 | 鴻海精密工業股份有限公司 | Motor |
CN104767326A (en) * | 2014-01-04 | 2015-07-08 | 鸿富锦精密工业(深圳)有限公司 | Motor |
JP6132936B2 (en) * | 2014-01-17 | 2017-05-24 | 三菱電機株式会社 | Rotating electric machine |
WO2016174711A1 (en) * | 2015-04-27 | 2016-11-03 | 三菱電機株式会社 | Rotating electric machine |
JP6825227B2 (en) * | 2016-05-09 | 2021-02-03 | 日産自動車株式会社 | Rotating machine |
USD872847S1 (en) | 2018-02-28 | 2020-01-14 | S. C. Johnson & Son, Inc. | Dispenser |
USD880670S1 (en) | 2018-02-28 | 2020-04-07 | S. C. Johnson & Son, Inc. | Overcap |
USD881365S1 (en) | 2018-02-28 | 2020-04-14 | S. C. Johnson & Son, Inc. | Dispenser |
USD872245S1 (en) | 2018-02-28 | 2020-01-07 | S. C. Johnson & Son, Inc. | Dispenser |
USD852938S1 (en) | 2018-05-07 | 2019-07-02 | S. C. Johnson & Son, Inc. | Dispenser |
USD853548S1 (en) | 2018-05-07 | 2019-07-09 | S. C. Johnson & Son, Inc. | Dispenser |
DE102019103541A1 (en) * | 2018-07-06 | 2020-01-09 | Hanon Systems | Cooling module with axial fan for vehicles, especially for electric vehicles |
US20240055915A1 (en) * | 2019-01-16 | 2024-02-15 | Borgwarner Inc. | Integrated stator cooling jacket system |
CN110397602A (en) * | 2019-06-27 | 2019-11-01 | 中国船舶重工集团公司第七一九研究所 | A kind of integrated pipeline pump |
DE102019120835A1 (en) * | 2019-08-01 | 2021-02-04 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Stator for an electric machine with high-performance cooling, electric machine, motor vehicle |
US11355980B2 (en) * | 2020-04-28 | 2022-06-07 | GM Global Technology Operations LLC | Electric motor and rotor end ring |
US11770041B2 (en) * | 2020-12-30 | 2023-09-26 | Dana Heavy Vehicle Systems Group, Llc | Systems and method for an electric motor with molded coolant jacket and spray ring |
EP4033643A1 (en) * | 2021-01-26 | 2022-07-27 | Toyota Jidosha Kabushiki Kaisha | An electric motor comprising a cooling system and a cooling method for cooling an electric motor |
GB2603926B (en) * | 2021-02-19 | 2023-05-03 | Electrified Automation Ltd | Electric machine, rotor and stator |
US12081099B2 (en) * | 2021-11-19 | 2024-09-03 | Dana Heavy Vehicle Systems Group, Llc | Electric machine with coolant jacket |
US12088149B2 (en) | 2021-12-02 | 2024-09-10 | Borgwarner Inc. | Cooling system for an electric machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007006554A (en) | 2005-06-21 | 2007-01-11 | Komatsu Ltd | Active oil-cooling structure for motor coil |
Family Cites Families (187)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2080678A (en) | 1936-02-15 | 1937-05-18 | Byron Jackson Co | Motor construction |
US2264616A (en) | 1938-09-21 | 1941-12-02 | John C Buckbee | Rotary compressor |
US2891391A (en) * | 1957-08-26 | 1959-06-23 | Vilter Mfg Co | Refrigerated hermetically sealed motors |
US2947892A (en) * | 1958-02-12 | 1960-08-02 | Gen Electric Canada | Ventilation of totally enclosed motors |
US3007064A (en) * | 1958-04-04 | 1961-10-31 | Task Corp | Liquid cooled rotor and stator |
US2951954A (en) * | 1959-02-12 | 1960-09-06 | Gen Electric | Fluid-coupled rotor for dynamoelectric machine |
US3188833A (en) * | 1959-11-23 | 1965-06-15 | Allis Louis Co | Electric motor with improved cooling means |
US3110827A (en) * | 1960-08-12 | 1963-11-12 | Westinghouse Electric Corp | Dynamoelectric machine |
SE318939B (en) | 1965-03-17 | 1969-12-22 | Asea Ab | |
CH461617A (en) * | 1966-04-07 | 1968-08-31 | Licentia Gmbh | Electric machine with section cooling |
US3435263A (en) * | 1966-05-04 | 1969-03-25 | Gen Electric | Gap pickup rotor with radially extended outlets |
SE311039B (en) * | 1968-09-11 | 1969-05-27 | Electrolux Ab | |
US3525001A (en) | 1968-09-23 | 1970-08-18 | Preco Inc | Liquid cooled electric motor |
US3643119A (en) * | 1970-11-05 | 1972-02-15 | Gen Electric | Ventilated dynamoelectric machine |
US3701911A (en) * | 1971-05-20 | 1972-10-31 | Skf Ind Trading & Dev | Motor bearing support and cooling means |
US3748507A (en) | 1971-12-02 | 1973-07-24 | Gen Electric | Variable speed drive having enhanced ventilation |
US3800173A (en) * | 1972-09-19 | 1974-03-26 | Gen Electric | Dynamoelectric machine having improved ventilation |
JPS5714105B2 (en) * | 1973-04-09 | 1982-03-23 | ||
US4038570A (en) | 1974-03-20 | 1977-07-26 | Durley Iii Benton A | Ultrasonic piezoelectric transducer drive circuit |
US4301386A (en) * | 1977-08-12 | 1981-11-17 | General Electric Co. | Rotor laminae assembly for a cast rotor dynamoelectric machine |
US4365178A (en) * | 1981-06-08 | 1982-12-21 | General Electric Co. | Laminated rotor for a dynamoelectric machine with coolant passageways therein |
US4745315A (en) * | 1983-12-15 | 1988-05-17 | General Electric Company | Brushless exciter with zero-gravity rectifier assembly |
US4547688A (en) * | 1984-05-07 | 1985-10-15 | Westinghouse Electric Corp. | Dynamoelectric machine with rotor ventilation system including prewhirl inlet guide vanes |
DE3724186A1 (en) * | 1987-07-17 | 1989-01-26 | Siemens Ag | ELECTRIC MACHINE WITH CLOSED COOLING CIRCUIT |
US5019733A (en) * | 1987-09-25 | 1991-05-28 | Honda Giken Kogyo Kabushiki Kaisha | AC generator |
DE3941474A1 (en) | 1989-12-15 | 1991-06-20 | Bosch Gmbh Robert | LIQUID-COOLED ELECTRIC GENERATOR |
US5081382A (en) | 1990-10-01 | 1992-01-14 | Sundstrand Corporation | Generator end turn cooling using oil flow control tubes |
JPH05103445A (en) | 1991-10-05 | 1993-04-23 | Fanuc Ltd | Liquid-cooled motor and its jacket |
US5372213A (en) | 1991-10-24 | 1994-12-13 | Aisin Aw Co., Ltd. | Oil circulating system for electric vehicle |
US5207121A (en) | 1992-02-13 | 1993-05-04 | General Motors Corporation | Gear case for locomotive drive system |
JPH05292704A (en) | 1992-04-14 | 1993-11-05 | Toshiba Corp | Rotor abnormality monitor |
US5180004A (en) | 1992-06-19 | 1993-01-19 | General Motors Corporation | Integral heater-evaporator core |
US5319272A (en) * | 1992-07-14 | 1994-06-07 | Eemco/Datron, Inc. | Miniature rotating rectifier assembly |
JPH0636364U (en) | 1992-10-13 | 1994-05-13 | 神鋼電機株式会社 | Cooling mechanism for outer-rotor type high-speed rotating electric machine |
JPH06311691A (en) | 1993-04-15 | 1994-11-04 | Meidensha Corp | Motor for electric car |
DE4331243A1 (en) * | 1993-09-15 | 1995-03-16 | Abb Management Ag | Air-cooled rotating electrical machine |
US5519269A (en) | 1994-06-10 | 1996-05-21 | Westinghouse Electric Corp. | Electric induction motor and related method of cooling |
US5616973A (en) | 1994-06-29 | 1997-04-01 | Yeomans Chicago Corporation | Pump motor housing with improved cooling means |
JPH09182374A (en) * | 1995-12-21 | 1997-07-11 | Aisin Aw Co Ltd | Cooling circuit of motor |
US6069424A (en) | 1996-05-02 | 2000-05-30 | Chrysler Corporation | Stator cooling |
JP3443248B2 (en) | 1996-07-30 | 2003-09-02 | 株式会社荏原製作所 | Water-cooled canned motor |
FI2782U1 (en) * | 1996-10-08 | 1997-03-10 | Rotatek Finland Oy | motor structure |
US6359232B1 (en) | 1996-12-19 | 2002-03-19 | General Electric Company | Electrical insulating material and stator bar formed therewith |
US5859482A (en) | 1997-02-14 | 1999-01-12 | General Electric Company | Liquid cooled electric motor frame |
US5757094A (en) * | 1997-03-28 | 1998-05-26 | General Electric Canada Inc. | Ventilation system for an AC machine having overhanging salient poles with juxtaposed shrouds |
US6075304A (en) | 1997-04-30 | 2000-06-13 | Alon Co., Ltd | Stator with molded encasement for small motors and manufacturing process therefor |
JPH10311375A (en) * | 1997-05-07 | 1998-11-24 | Fanuc Ltd | Rotary body structure |
JP3407643B2 (en) | 1997-05-26 | 2003-05-19 | 株式会社デンソー | AC generator for vehicles |
DE69830869T2 (en) | 1997-05-26 | 2006-05-24 | Denso Corp., Kariya | Alternator for motor vehicles |
EP0881756B1 (en) | 1997-05-26 | 2001-08-01 | Denso Corporation | Alternator for vehicle |
US5965965A (en) | 1997-05-26 | 1999-10-12 | Denso Corporation | Stator winding arrangement of alternator for vehicle |
FR2765042B1 (en) | 1997-06-19 | 1999-09-10 | Valeo Equip Electr Moteur | ALTERNATOR WITH IMPROVED COOLING MEANS, IN PARTICULAR FOR A MOTOR VEHICLE |
JP3769990B2 (en) | 1999-08-06 | 2006-04-26 | 株式会社デンソー | Conductor segment bonding type rotating electrical machine and method for manufacturing the same |
US6181043B1 (en) | 1997-12-10 | 2001-01-30 | Denso Corporation | Alternator for vehicle |
JP3209175B2 (en) | 1998-02-23 | 2001-09-17 | 日本電気株式会社 | Method for manufacturing thin film capacitor |
US6095754A (en) | 1998-05-06 | 2000-08-01 | Applied Materials, Inc. | Turbo-Molecular pump with metal matrix composite rotor and stator |
DE69915406T2 (en) | 1998-05-25 | 2005-03-24 | Denso Corp., Kariya | Method for producing the stator of a motor vehicle alternating current generator |
JP3899685B2 (en) | 1998-06-26 | 2007-03-28 | 株式会社デンソー | Stator for vehicle alternator and manufacturing method thereof |
DE69923623T2 (en) | 1998-05-25 | 2005-07-07 | Denso Corp., Kariya | Automotive alternator and manufacturing method |
EP0961386B1 (en) | 1998-05-25 | 2003-01-02 | Denso Corporation | Stator of ac generator for vehicle |
US6201321B1 (en) | 1998-06-05 | 2001-03-13 | Bayside Controls, Inc. | Apparatus and method for dissipating heat from a motor |
JP3559891B2 (en) | 1998-06-22 | 2004-09-02 | 日産自動車株式会社 | Cooling structure of multilayer motor |
US5937817A (en) | 1998-06-23 | 1999-08-17 | Harley-Davidson Motor Company | Dry sump oil cooling system |
JP3275839B2 (en) | 1998-08-06 | 2002-04-22 | 株式会社デンソー | AC generator for vehicles |
JP3535025B2 (en) | 1998-11-09 | 2004-06-07 | 財団法人鉄道総合技術研究所 | Fully enclosed cooling rotary electric machine |
JP2000152561A (en) | 1998-11-10 | 2000-05-30 | Toshiba Transport Eng Inc | Ventilation filter and ventilation cooling type dynamo electric machine provided with ventilation filter |
US6300693B1 (en) | 1999-03-05 | 2001-10-09 | Emerson Electric Co. | Electric motor cooling jacket assembly and method of manufacture |
HU224944B1 (en) | 1999-03-25 | 2006-04-28 | Gen Electric | Electric motor |
US6313559B1 (en) | 1999-04-14 | 2001-11-06 | Denso Corporation | Stator arrangement of rotary electric machine |
JP2000324757A (en) | 1999-05-07 | 2000-11-24 | Toshiba Corp | Outer rotor type of motor |
JP2000333409A (en) | 1999-05-21 | 2000-11-30 | Matsushita Electric Ind Co Ltd | Induction motor |
JP3478182B2 (en) | 1999-07-12 | 2003-12-15 | 株式会社デンソー | Rotating electric machine and method of manufacturing the same |
US6173758B1 (en) | 1999-08-02 | 2001-01-16 | General Motors Corporation | Pin fin heat sink and pin fin arrangement therein |
US7211919B2 (en) * | 1999-08-16 | 2007-05-01 | American Superconductor Corporation | Thermally-conductive stator support structure |
DE69923799T2 (en) | 1999-09-03 | 2006-02-09 | Hitachi, Ltd. | DYNAMOELECTRIC MACHINE |
US6583526B2 (en) * | 1999-10-19 | 2003-06-24 | General Electric Company | Generator stator core vent duct spacer posts |
US6509665B1 (en) | 1999-10-25 | 2003-01-21 | Matsushita Electric Industial Co., Ltd. | Motor having stator with insulator of high heat-conductivity |
JP4450125B2 (en) | 1999-12-09 | 2010-04-14 | 株式会社デンソー | Rotating electric machine for vehicles |
JP2001258190A (en) * | 2000-03-13 | 2001-09-21 | Hitachi Ltd | Rotary electric machine |
JP3656733B2 (en) | 2000-04-14 | 2005-06-08 | 株式会社デンソー | Stator for rotating electrical machine for vehicle and method for manufacturing the same |
JP2001333559A (en) | 2000-05-19 | 2001-11-30 | Nissan Motor Co Ltd | Motor stator |
JP2002010555A (en) * | 2000-06-21 | 2002-01-11 | Denso Corp | Rotary electric machine for vehicle |
US6404628B1 (en) | 2000-07-21 | 2002-06-11 | General Motors Corporation | Integrated power electronics cooling housing |
JP3675322B2 (en) | 2000-09-18 | 2005-07-27 | 株式会社日立製作所 | Vehicle alternator |
JP2002119019A (en) | 2000-10-11 | 2002-04-19 | Honda Motor Co Ltd | Cooling structure of motor |
JP3551148B2 (en) | 2000-11-30 | 2004-08-04 | 株式会社デンソー | AC generator for vehicles |
US6579202B2 (en) | 2000-12-18 | 2003-06-17 | General Motors Corporation | Lubrication and cooling system for power receiving and delivery units in an electro-mechanical vehicular transmission |
JP4496651B2 (en) | 2001-01-19 | 2010-07-07 | 株式会社デンソー | Vehicle alternator |
WO2002071577A1 (en) * | 2001-03-07 | 2002-09-12 | Hitachi, Ltd. | Rotary electric machinery |
DE10112532A1 (en) * | 2001-03-15 | 2002-10-02 | Siemens Ag | Air-cooled electric rotary machine |
DE10117398A1 (en) * | 2001-04-06 | 2002-10-10 | Miscel Oy Ltd | Electric asynchronous motor |
JP3770107B2 (en) * | 2001-06-22 | 2006-04-26 | 日産自動車株式会社 | Motor cooling structure |
JP3705193B2 (en) * | 2001-12-03 | 2005-10-12 | 日産自動車株式会社 | Drive device for hybrid vehicle |
JP3738733B2 (en) | 2002-01-18 | 2006-01-25 | 株式会社デンソー | Stator for rotating electrical machine for vehicle and method for manufacturing the same |
US20040036367A1 (en) * | 2002-01-30 | 2004-02-26 | Darin Denton | Rotor cooling apparatus |
DE10207486B4 (en) | 2002-02-22 | 2014-10-16 | Audi Ag | Drive system for a motor vehicle with an electric machine |
JP3882637B2 (en) | 2002-02-22 | 2007-02-21 | 日産自動車株式会社 | Motor cooling device |
AU2003211416A1 (en) | 2002-02-25 | 2003-09-09 | Futek Furnace Inc. | Device and method for heat treatment |
JP3736754B2 (en) | 2002-03-01 | 2006-01-18 | 株式会社デンソー | Vehicle alternator stator |
CN1258254C (en) | 2002-04-01 | 2006-05-31 | 日产自动车株式会社 | Cooling structure of stator for multi-shaft multi-layer rotary electric machine |
JP4106951B2 (en) | 2002-04-03 | 2008-06-25 | トヨタ自動車株式会社 | Vehicle drive electric device |
JP3967624B2 (en) | 2002-04-26 | 2007-08-29 | 株式会社日本自動車部品総合研究所 | Electric motor |
US6727611B2 (en) | 2002-05-28 | 2004-04-27 | Emerson Electric Co. | Cooling jacket for electric machines |
US20050023909A1 (en) | 2002-06-13 | 2005-02-03 | Cromas Joseph Charles | Automotive generator |
DE10227227A1 (en) | 2002-06-18 | 2004-01-22 | Siemens Ag | corona shielding |
US20070149073A1 (en) | 2002-06-18 | 2007-06-28 | Siemens Aktiengesellschaft | Electric machine with a corona shield |
JP2004048890A (en) | 2002-07-11 | 2004-02-12 | Denso Corp | Rotary electric machine |
US6700238B1 (en) * | 2002-08-13 | 2004-03-02 | Wei Tong | Generator gas shield and related method |
CH696050A5 (en) * | 2002-08-16 | 2006-11-30 | Alstom Technology Ltd | Rotor for an electric machine. |
JP3685169B2 (en) | 2002-09-27 | 2005-08-17 | 株式会社日立製作所 | Rotating machine and manufacturing method thereof |
US6882068B2 (en) * | 2002-10-08 | 2005-04-19 | General Electric Company | Forced air stator ventilation system and stator ventilation method for superconducting synchronous machine |
US6779799B2 (en) * | 2002-11-27 | 2004-08-24 | General Electric Company | Sealing apparatus for electrical generator ventilation system |
JP2004215353A (en) | 2002-12-27 | 2004-07-29 | Toyota Motor Corp | Rotary electric machine |
JP2004236376A (en) | 2003-01-28 | 2004-08-19 | Nissan Motor Co Ltd | Internal cooling type motor |
JP4185782B2 (en) | 2003-02-13 | 2008-11-26 | トヨタ自動車株式会社 | Vehicle drive device |
JP4496710B2 (en) | 2003-03-27 | 2010-07-07 | 日産自動車株式会社 | Cooling structure of rotating electric machine |
JP2004312845A (en) | 2003-04-04 | 2004-11-04 | Nissan Motor Co Ltd | Stator for motor |
JP2004312886A (en) | 2003-04-08 | 2004-11-04 | Suzuki Motor Corp | Cooling structure of electric motor |
FR2855673A1 (en) | 2003-05-26 | 2004-12-03 | Valeo Equip Electr Moteur | ROTATING ELECTRIC MACHINE, SUCH AS AN ALTERNATOR OR STARTER, PARTICULARLY FOR A MOTOR VEHICLE |
JP2005012989A (en) | 2003-05-28 | 2005-01-13 | Toyota Motor Corp | Cooling structure of stator in rotating electric machine |
JP2004357472A (en) | 2003-05-30 | 2004-12-16 | Suzuki Motor Corp | Cooling structure of motor |
DE10335038A1 (en) | 2003-08-01 | 2005-03-10 | Siemens Ag | Electric machine with rotor cooling and cooling method |
JP4187606B2 (en) | 2003-08-07 | 2008-11-26 | 川崎重工業株式会社 | Electric motor |
JP4442207B2 (en) | 2003-12-05 | 2010-03-31 | 日産自動車株式会社 | Cooling structure of rotating electric machine |
DE20319969U1 (en) * | 2003-12-23 | 2004-03-11 | Siemens Ag | Rotation carrier with elastic connection device for installing electrical machines in pipes |
US6987337B2 (en) * | 2004-01-09 | 2006-01-17 | Siemens Westinghouse Power Corporation | Cam locked air gap baffle assembly for a dynamoelectric machine |
US7276006B2 (en) | 2004-03-22 | 2007-10-02 | General Motors Corporation | Transmission case for lube return and method |
US7284313B2 (en) | 2004-03-22 | 2007-10-23 | General Motors Corporation | Method for assembling a hybrid electro-mechanical transmission |
US7508100B2 (en) * | 2004-03-22 | 2009-03-24 | General Motors Corporation | Electric motor/generator and method of cooling an electromechanical transmission |
US7002267B2 (en) | 2004-03-22 | 2006-02-21 | General Motors Corporation | Method and apparatus for cooling a hybrid transmission electric motor |
JP4047903B2 (en) * | 2004-03-29 | 2008-02-13 | 松下電器産業株式会社 | Biological information measuring optical element and biological information measuring apparatus using the same |
US7592045B2 (en) | 2004-06-15 | 2009-09-22 | Siemens Energy, Inc. | Seeding of HTC fillers to form dendritic structures |
US7553438B2 (en) | 2004-06-15 | 2009-06-30 | Siemens Energy, Inc. | Compression of resin impregnated insulating tapes |
US7239055B2 (en) | 2004-07-28 | 2007-07-03 | Gm Global Technology Operations, Inc. | Motor cooling system |
US7339300B2 (en) | 2004-07-28 | 2008-03-04 | Gm Global Technology Operations, Inc. | Structural support member for stator retention and method of assembling an electromechanical transmission |
US7402923B2 (en) | 2004-07-29 | 2008-07-22 | General Motors Corporation | Electrically variable transmission |
KR101025773B1 (en) * | 2004-07-30 | 2011-04-04 | 삼성테크윈 주식회사 | Turbo generator apparatus and fuel cell system with the same |
JP2006060914A (en) | 2004-08-19 | 2006-03-02 | Mitsubishi Motors Corp | Motor cooling structure and manufacturing method thereof |
WO2006028981A2 (en) | 2004-09-01 | 2006-03-16 | Remy International, Inc. | Electronic package for electrical machine |
JP4542864B2 (en) * | 2004-10-05 | 2010-09-15 | 株式会社東芝 | Rotating electric machine and armature winding of rotating electric machine |
JP4686228B2 (en) * | 2005-03-23 | 2011-05-25 | 株式会社東芝 | Fully enclosed fan motor |
JP2006297541A (en) | 2005-04-20 | 2006-11-02 | Nsk Ltd | Rotary shaft device of machine tool |
US7462962B2 (en) * | 2005-06-13 | 2008-12-09 | General Electric Company | Cooling system for an electrical machine with center rotor cooling dusts |
DE102005027953A1 (en) | 2005-06-16 | 2006-12-28 | Siemens Ag | Permanent magnet excited electric machine with rotor cooling |
DE102005034659B3 (en) | 2005-07-25 | 2007-04-12 | Lenze Drive Systems Gmbh | Holding device for a cup capacitor |
US7705503B2 (en) | 2005-09-07 | 2010-04-27 | Kabushiki Kaisha Toshiba | Rotating electrical machine |
JP4815967B2 (en) | 2005-09-21 | 2011-11-16 | トヨタ自動車株式会社 | Permanent magnet rotating electric machine |
US7342345B2 (en) * | 2005-10-28 | 2008-03-11 | General Electric Company | Paddled rotor spaceblocks |
TWI265666B (en) * | 2005-12-02 | 2006-11-01 | Delta Electronics Inc | Stator structure and manufacturing method thereof |
US20070145836A1 (en) | 2005-12-22 | 2007-06-28 | Emerson Electric Co. | Winding lead cooling for motor with heat-sensitive electronic components |
US7538457B2 (en) | 2006-01-27 | 2009-05-26 | General Motors Corporation | Electric motor assemblies with coolant flow for concentrated windings |
US7545060B2 (en) | 2006-03-14 | 2009-06-09 | Gm Global Technology Operations, Inc. | Method and apparatus for heat removal from electric motor winding end-turns |
JP2007282341A (en) | 2006-04-04 | 2007-10-25 | Shimadzu Corp | Motor equipped with cooling mechanism |
US7709988B2 (en) * | 2006-04-07 | 2010-05-04 | General Electric Company | Methods and apparatus for using an electrical machine to transport fluids through a pipeline |
US7615903B2 (en) | 2006-04-27 | 2009-11-10 | Gm Global Technology Operations, Inc. | Structural support member for electric motor/generator in electromechanical transmission |
JP5016843B2 (en) * | 2006-04-28 | 2012-09-05 | 株式会社東芝 | Rotating electrical machine rotor |
JP4891688B2 (en) | 2006-07-24 | 2012-03-07 | 株式会社東芝 | Fully enclosed motor |
US7615951B2 (en) | 2006-09-08 | 2009-11-10 | Gm Global Technology Operations, Inc. | Method and system for limiting the operating temperature of an electric motor |
DE102006044963B3 (en) | 2006-09-22 | 2008-06-19 | Siemens Ag | Stator for an electric machine with liquid cooling |
JP2008206213A (en) | 2007-02-16 | 2008-09-04 | Mitsubishi Motors Corp | Electric motor structure for electric vehicle |
JP4980747B2 (en) | 2007-02-28 | 2012-07-18 | トヨタ自動車株式会社 | Rotating electric machine |
US7948126B2 (en) | 2007-03-16 | 2011-05-24 | Remy Technologies, L.L.C. | Liquid cooling system of an electric machine |
US20090033160A1 (en) * | 2007-07-31 | 2009-02-05 | Daniel Mueller | Electric motor for hybrid or electric vehicle |
US7880347B2 (en) * | 2007-08-02 | 2011-02-01 | Remy Technologies, Inc. | Airflow cooling pattern for belt-driven vehicle electrical power generator |
FR2923098A1 (en) * | 2007-10-24 | 2009-05-01 | Valeo Equip Electr Moteur | ROTATING ELECTRICAL MACHINE HOUSING ASSEMBLY AND ROTATING ELECTRIC MACHINE COMPRISING SUCH AN ASSEMBLY. |
US7939975B2 (en) | 2007-10-26 | 2011-05-10 | E. I Du Pont De Nemours And Company | Over-mold stator assembly and process for preparation thereof |
US8053938B2 (en) | 2007-11-09 | 2011-11-08 | Hamilton Sundstand Corporation | Enhanced motor cooling system |
KR100969037B1 (en) | 2007-11-09 | 2010-07-09 | 현대자동차주식회사 | Device and method for cooling motor of HEV |
US7655868B2 (en) | 2008-01-08 | 2010-02-02 | General Electric Company | Stator bar components with high thermal conductivity |
US7723874B2 (en) | 2008-02-15 | 2010-05-25 | Gm Global Technology Operations, Inc. | Cooling systems and methods for integration electric motor-inverters |
JP2009247085A (en) | 2008-03-31 | 2009-10-22 | Hitachi Ltd | Rotary electric machine |
JP2009247084A (en) | 2008-03-31 | 2009-10-22 | Hitachi Ltd | Rotary electric machine and vehicle |
JP5009220B2 (en) | 2008-04-10 | 2012-08-22 | 株式会社ミツバ | Electric motor |
EP2109206B1 (en) | 2008-04-10 | 2013-05-29 | Siemens Aktiengesellschaft | Generator with a stator comprising cooling ducts and method for cooling a laminated stator of a generator |
JP2009261072A (en) * | 2008-04-14 | 2009-11-05 | Toyota Motor Corp | Motor for vehicle |
JP2010028908A (en) | 2008-07-16 | 2010-02-04 | Toyota Motor Corp | Rotor of rotating electrical machine |
JP5261052B2 (en) | 2008-07-17 | 2013-08-14 | トヨタ自動車株式会社 | Rotating electric machine and rotating electric machine cooling system |
JP2010035265A (en) | 2008-07-25 | 2010-02-12 | Meidensha Corp | Temperature-measuring device for rotor of electric motor |
JP2010063253A (en) | 2008-09-03 | 2010-03-18 | Toyota Motor Corp | Rotor |
US20100102649A1 (en) | 2008-10-24 | 2010-04-29 | Deere & Company | Hydroformed cooling channels in stator laminations |
US8067865B2 (en) | 2008-10-28 | 2011-11-29 | Caterpillar Inc. | Electric motor/generator low hydraulic resistance cooling mechanism |
US8049385B2 (en) | 2008-11-06 | 2011-11-01 | Nidec Motor Corporation | Liquid deflecting baffle for an electric motor |
JP2010121701A (en) | 2008-11-19 | 2010-06-03 | Ntn Corp | In-wheel motor driving device |
JP4919106B2 (en) | 2009-01-15 | 2012-04-18 | アイシン・エィ・ダブリュ株式会社 | Stator |
US8487575B2 (en) | 2009-08-31 | 2013-07-16 | GM Global Technology Operations LLC | Electric motor stator winding temperature estimation |
EP2320540A1 (en) | 2009-11-05 | 2011-05-11 | Siemens Aktiengesellschaft | Arrangement for cooling of an electrical machine |
EP2320080A1 (en) | 2009-11-06 | 2011-05-11 | Siemens Aktiengesellschaft | Arrangement for cooling of an electrical generator |
-
2010
- 2010-06-08 US US12/796,563 patent/US8519581B2/en active Active
-
2011
- 2011-05-26 KR KR1020137000382A patent/KR101738208B1/en active IP Right Grant
- 2011-05-26 EP EP11792882.0A patent/EP2580853A4/en not_active Ceased
- 2011-05-26 WO PCT/US2011/038061 patent/WO2011156142A2/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007006554A (en) | 2005-06-21 | 2007-01-11 | Komatsu Ltd | Active oil-cooling structure for motor coil |
Also Published As
Publication number | Publication date |
---|---|
US8519581B2 (en) | 2013-08-27 |
EP2580853A2 (en) | 2013-04-17 |
EP2580853A4 (en) | 2015-12-30 |
KR101738208B1 (en) | 2017-05-19 |
WO2011156142A3 (en) | 2012-04-19 |
US20110298317A1 (en) | 2011-12-08 |
KR20130110147A (en) | 2013-10-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8519581B2 (en) | Electric machine cooling system and method | |
US8269383B2 (en) | Electric machine cooling system and method | |
US8456046B2 (en) | Gravity fed oil cooling for an electric machine | |
US11018539B2 (en) | Electric machine with helical cooling channels | |
CN103155376B (en) | Coolant channel for motor stator | |
US8692425B2 (en) | Cooling combinations for electric machines | |
US11303174B2 (en) | Rotor for an electric machine | |
EP1719236B1 (en) | Cooling system for dynamoelectric machine | |
US9041260B2 (en) | Cooling system and method for an electronic machine | |
US20120080965A1 (en) | Coolant Channels for Electric Machine Stator | |
US8546983B2 (en) | Split drain system and method for an electric machine module | |
JP2013526264A (en) | Electromechanical cooling system and method | |
US9979260B2 (en) | Method and device for liquid cooling of an electric motor | |
US8648506B2 (en) | Rotor lamination cooling system and method | |
CN103502652B (en) | The electric fluid pump of the wet operation area with cooling | |
CN104723856B (en) | Hybrid power drive module with motor | |
US20120262013A1 (en) | Electric Machine Module Cooling System and Method | |
KR20150084933A (en) | Method and device for liquid cooling of an electric motor | |
US8546982B2 (en) | Electric machine module cooling system and method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11792882 Country of ref document: EP Kind code of ref document: A2 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011792882 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20137000382 Country of ref document: KR Kind code of ref document: A |