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| Number | Title | Issue Date |
| 7816824 | Electric motor with permanent magnet excitation and rotor cooling The invention relates to an electric motor (1) with permanent magnet excitation, comprising a stator (2), a rotor (8), comprising a hollow shaft (13) on which the permanent magnets (9) are positioned. The hollow shaft (13) i... | 10/19/2010 |
| 7804208 | Method and structure for cooling an electric motor A high speed electric motor for use in a variety of applications. The electric motor an electric motor including a motor housing or stator, a rotor having a commutator and brushes for contacting the commutator at a predefined area known as the contact area. Addition... | 09/28/2010 |
| 7701096 | Totally enclosed type main drive motor for vehicle A totally enclosed type main drive motor for a vehicle includes a stator core arranged on an inner circumference of an outer casing frame, a bracket arranged on one end of the outer casing frame to have a bearing built-in, a housing arranged on the other end of the ... | 04/20/2010 |
| 7633194 | Apparatus for cooling stator lamination stacks of electrical machines A coaxial stack of laminations for a stator of an electrical machine uses laminations that are substantially identical and in direct abutment with one another. Each of the laminations has an outer periphery and an inner periphery with the outer periphery being defin... | 12/15/2009 |
| 7402923 | Electrically variable transmission A transmission includes a housing, an electric motor having a stator within the housing, and a member including a generally cylindrical portion that circumscribes at least part of the stator. The member cooperates with the housing to form an annular coolant flowpath... | 07/22/2008 |
| 7352090 | Fluid-submerged electric motor An electric motor has at least one component that is submerged in a cooling fluid held in a fluid-filled cavity. The stator, rotor, and rotor shaft bearings are all possible components that may be submerged. The cooling fluid floods the stator, rotor, and/or bearing... | 04/01/2008 |
| 7247959 | Dynamoelectric machine with arcuate heat exchanger and related methods A dynamoelectric machine 30 includes a rotor 32 and a stator 34 surrounding the rotor. The dynamoelectric machine 30 further includes a generator housing 36 surrounding both the rotor 32 and the stator 34. Additionall... | 07/24/2007 |
| 7237665 | Thermal energy transfer limited rotating shaft for a pneumatic fan drive system A clutch assembly (20) for a fan drive system (12) of an engine (14) includes a translatable clutch housing (30) that is coupled to a fan (16). A rotating shaft (27) has a non-grooved thermal energy transfer portion (28 | 07/03/2007 |
| 7220298 | Anti-corrosive mixture and coating substances containing said anti-corrosive mixture A corrosion inhibiting mixture comprising (A1) corrosion-inhibiting pigments, (A2) amorphous silica modified with metal ions, and (A3) at least one compound of the general formula I: Mn(X)m  ... | 05/22/2007 |
| 7202579 | Corrosion protective coating for extending the lifetime of water cooled stator bar clips A water-cooled stator bar clip for electrical generators and a method for applying a corrosion-resistant protective coating, preferably Sc, Ti, Cr, Zr, Nb, Mo, Hf, Ta, W, Ni, and Al, and their alloys or oxides to existing stator bar end fittings in order to signific... | 04/10/2007 |
| 7142125 | Fan monitoring for failure prediction A method for monitoring a fan comprises measuring power usage of the fan, determining a derivative of the measured fan power usage, tracking the derivative over time, and predicting impending fan failure based on the tracked fan power usage derivative. ... | 11/28/2006 |
| 7109613 | Power hand tool A power hand tool includes a body and an electric motor in the body and having a shaft for driving a connector for connecting and driving a cleaning/polishing implement. An enclosure encloses the motor for protection against intrusion of a liquid, and includes a the... | 09/19/2006 |
| 7105959 | Cooling jacket and motor unit with cooling jacket A cooling jacket for an electric motor and a motor unit with a cooling jacket mounted on an electric motor having simple structure and capable of being manufactured with reduced number of processes. A cooling pipe made of copper and the like is bent, and held by pla... | 09/12/2006 |
| 7105960 | Generator mountable to vehicle A generator includes a case for accommodating a stator, a rotor and a fan. The case includes two end walls in an axial direction and a peripheral side wall. The case has plural axial opening portions which are provided in at least one of the two end walls and open a... | 09/12/2006 |
| 7102267 | Electric machine with thermosiphon-type cooling system An electric machine includes a housing for accommodating a rotatably supported rotor and a stationary stator, and a cooling device for cooling heat-generating components of the rotor and the stator. The cooling device includes a closed-flow system having an evaporat... | 09/05/2006 |
| 7053513 | Magnetic circuit structure for rotary electric machine A rotary electric machine includes inner and outer rotors each including permanent magnets, and a stator including stator coils, disposed between the inner and outer rotors. The inner rotor further includes outer surface portions serving as a yoke portion of an oute... | 05/30/2006 |
| 7013651 | Compact quick attach starter-generator installation A mounting system for mounting an air-cooled device to a mount, the device having a mounting flange and a cooling air outlet radially inward of an outer periphery of the device, the mounting flange adapted to cooperate with the mount, where the mounting system has a... | 03/21/2006 |
| 7009317 | Cooling system for an electric motor A cooling system for an electric motor includes a cooling duct formed between a cooling jacket and a separate component surface. The separate component surface may define at least a portion of a wall of the cooling duct. The cooling duct may be configured to direct ... | 03/07/2006 |
| 7009316 | Electric rotary machine In the stator of a electric rotary machine in which heat conductive insulation resin is filled at the end portions of a stator coil, the material of a stator core, the stator coil, the heat conductive insulation resin and a frame is selected such that a linear therm... | 03/07/2006 |
| 7002267 | Method and apparatus for cooling a hybrid transmission electric motor The present invention is drawn to a method and apparatus for cooling a hybrid transmission electric motor. More precisely, an annular chamber is formed between a housing for the electric motor and a transmission housing. Coolant is disposed in the annular chamber an... | 02/21/2006 |
| 6960851 | Cooling device including a biasing element A cooling device for an internal stator of an electric machine. The stator includes a substantially cylindrical cavity having a substantially cylindrical internal surface. The cooling device includes a body defining an external substantially cylindrical contact surf... | 11/01/2005 |
| 6954010 | Lamination cooling system An electric motor, transformer or inductor having a lamination cooling system including a stack of laminations, each defining a plurality of apertures at least partially coincident with apertures of adjacent laminations. The apertures define a plurality of cooling-f... | 10/11/2005 |
| 6936939 | Rotating electric machine and cooling method thereof A rotating electric machine having a plurality of ventilating passages formed between a stator frame and a stator iron core and coolers which cool a coolant being provided in the plurality of the ventilating passages. A ventilating circuit in which at least a portio... | 08/30/2005 |
| 6920683 | Process for producing a rotor assembly of a stepping motor In a stepping motor in which a cylindrical magnet which is magnetized in an axial direction is coupled with a rotary shaft and the magnet is clamped with rotor stacks formed by laminating annular magnetic plates, the surfaces of which are electrically insulated, to ... | 07/26/2005 |
| 6914354 | Assembly and method for direct cooling of motor end-winding Methods and related systems providing removal of heat from electric motors via fluid baths. ... | 07/05/2005 |
| 6909211 | Rotary electric machine with forced ventilation The present invention provides an electric machine with forced ventilation, the machine comprising: a rotor capable of rotating about an axis of rotation; a stator within which the rotor can rotate, said stator com... | 06/21/2005 |
| 6906440 | Bracket assembly having a plurality of plates for a dynamoelectric machine A bracket assembly for a dynamoelectric machine includes a base plate and a bracket support assembly. The bracket support assembly includes a first end plate, a second end plate and a support member connected to at least one support plate. The bracket support assemb... | 06/14/2005 |
| 6903471 | Stator cooling structure for multi-shaft, multi-layer electric motor A multi-shaft, multi-layer motor has a stator coaxially disposed between inner and outer rotors which are driven independently by a compound current. For cooling stator coils, first through last branch coolant passages are arranged around the axis. The upstream ends... | 06/07/2005 |
| 6864604 | Cooling structure for multi-shaft, multi-layer electric motor A multi-shaft, multi-layer motor includes an inner rotor, an outer rotor surrounding the inner rotor, and a stator disposed coaxially between the inner and outer rotors. The motor further includes an outer member surrounding the outer rotor and defining a first wet ... | 03/08/2005 |
| 6791230 | System and method for retaining wedges in a rotor A rotor with wedges and a method of retaining wedges in a rotor are disclosed. The rotor includes a shaft, first and second poles extending radially from the shaft, and first and second coils of windings respectively wrapped around the first and second poles. Each c... | 09/14/2004 |
| 6791232 | Generator gas shield and related method A generator gas shield includes an annular ring body having an outer radially extending flange terminating at a first free end of a first diameter; a curved inlet portion; a substantially axial portion surrounding a center opening, and a curved outlet portion termin... | 09/14/2004 |
| 6724107 | Dynamo-electric machine A rotating electric machine exhibits a substantially level axial temperature rise distribution by supplying a coolant which is sufficiently cooled to a central portion of an iron core which is most distant from each of the axial ends of the iron core. A plurality of... | 04/20/2004 |
| 6720688 | Electric machine Electric machine (10) which can be operated as a motor or generator, with a rotor (26a, 26b) rotatably mounted in a housing (12), a rotor shaft (24) which extends beyond the housing (12) and a plurality of elec... | 04/13/2004 |
| 6707180 | Cooling method and structure for a rotation object A coolant inlet and a coolant outlet are opened on an inner surface enclosing an inner space of a rotation object. The coolant inlet and the coolant outlet are located on a rotation axis and face each other. A main-stream which flows straightly along the rotation ax... | 03/16/2004 |
| 6700238 | Generator gas shield and related method A generator gas shield includes an annular ring body having an outer radially extending flange terminating at a first free end of a first diameter; a curved inlet portion; a substantially axial portion surrounding a center opening, and a curved outlet por... | 03/02/2004 |
| 6700236 | Liquid-cooled vehicle rotary electric machine A liquid-cooled vehicle generator-motor includes a frame having a liquid passage, a stator core fixedly fitted to the inner periphery of the frame, a multi-phase stator winding accommodated in the plurality of slots of the stator core, and a rotor dispose... | 03/02/2004 |
| 6664672 | Enhancement of stator leakage inductance in air-core machines A method of maintaining a desired level of sub-transient reactance in a superconducting machine includes specifying a desired level of sub-transient reactance. A stator assembly is produced that includes at least one stator coil assembly having a first pr... | 12/16/2003 |
| 6661124 | Linear motor coils assembly and method for manufacturing the same In a linear motor coil assembly (12), and a method for manufacturing the same, a plurality of coils (14) are arranged in a line in a direction of movement and have respective coil axes perpendicular to the direction of movement of the motor. A flat coolin... | 12/09/2003 |
| 6577036 | Design for frameless cartridge motors A system and method is disclosed for the construction of a frameless cartridge motor. In accordance with one embodiment of the present invention a frameless cartridge motor is provided such that the motor's rotor is aligned with the motor's stator, a feed... | 06/10/2003 |
| 6455963 | Electric motor A frame for an electric motor is provided with a high heat discharge efficiency at low manufacturing cost wherein a plurality of cooling media paths, grooves, groove paths, media paths and communication paths are formed on the frame using a diecast proces... | 09/24/2002 |
