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| Number | Title | Issue Date |
| 7915771 | Salient-pole machine comprising at least one field coil The invention relates to a salient-pole machine comprising at least one field coil that extends in an axial direction of the salient-pole machine and is located below a pole shoe on a rotor body. Said machine is characterized in that the field coil is pressed agains... | 03/29/2011 |
| 7791230 | Heat transfer enhancement of dynamoelectric machine rotors A rotor is provided for a dynamoelectric machine having one or more windings. The windings have one or more turns, and the turns have one or more outlet ducts that are located near a chimney. When the outlet ducts are stacked one on top of another, they form substan... | 09/07/2010 |
| 7629716 | Electromagnetic device with closed heat transfer system Electromagnetic components are provided with a heat exchange mechanism. For example, a fluid-cooled electromagnetic field-functioning device, such as a motor, generator, transformer, solenoid or relay, comprises one or more electrical conductors. A monolithic body o... | 12/08/2009 |
| 7294943 | Electric rotating machine An electric rotating machine capable of lowering the temperature of a rotor disposed, wherein at least one of closed ventilation loops for cooling is formed, one of the loops constituting a ventilation passage communicating with an exhaust side through a heat source... | 11/13/2007 |
| 7285881 | Superconducting device comprising a cooling unit for cooling a rotating, superconductive coil The supraconductor device contains a rotor, which can rotate about a rotational axis, with a supraconductive coil in a heat conducting coil support. The coil support comprises a central cylindrical cavity. A cooling head, which is located outside of the rotor, of a ... | 10/23/2007 |
| 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 |
| 7242119 | Electrical machine having a stator with cooled winding bars An electrical machine comprises a stator (10) with a laminated core (11) in which two or more slots (12) are provided which run in the axial direction and in each of which two or more winding bars (13, 14) are arranged one above the other... | 07/10/2007 |
| 7227289 | Unified assembly for slot cell insulation The present invention facilitates keeping the slot cells 8 of a generator rotor from migrating during operation of the rotor. The present invention utilizes a slot cell catch 10 that hold slot cells 8, both U-shaped and L-shaped, in position wit... | 06/05/2007 |
| 7141898 | Gas-cooled generator Gaseous coolant, preferably helium, flows from coolers 12 past the winding overhangs 7 of the stator 3, then through cooling channels in the rotor 1, then into the rotor/stator gap 4, then through cooling ducts in the stator core | 11/28/2006 |
| 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 |
| 7098550 | Method for controlling a wind energy plant The present invention concerns a method of controlling a wind power installation and a wind power installation in particular for carrying out the method. Wind power installations have been generally known for a long time and in recent times are increasingly u... | 08/29/2006 |
| 7095243 | AC generator exciter rotor slip-ring test apparatus A test apparatus assembly is provided for testing an AC generator having an exciter rotor mounted to a shaft. The apparatus includes an annular end bell, a carbon brush assembly coupled to the end bell including a housing coupled to the end bell inner peripheral sur... | 08/22/2006 |
| 7088021 | Electric motor structure An electric motor structure includes a rotary shaft with a coolant passageway therein and a rotor with a cooling surface non-rotatably coupled to the rotary shaft. The coolant is supplied from the coolant passageway of the rotary shaft to the cooling surface of the ... | 08/08/2006 |
| 7071586 | Dynamo-electric machine An electric rotating machine capable of lowering the temperature of a rotor disposed, wherein at least one of closed ventilation loops for cooling is formed, one of the loops constituting a ventilation passage communicating with an exhaust side through a heat source... | 07/04/2006 |
| 6965185 | Variable pitch manifold for rotor cooling in an electrical machine A rotor in an electrical machine, the rotor comprises a magnetic core having at least two poles, a plurality of winding assemblies, one for each pole, and a cylindrical tube enclosing the magnetic core and winding assemblies, the tube including a plurality of rings ... | 11/15/2005 |
| 6959585 | Skids, modules, and modular system for monitoring hydrogen-cooled generators A modular system for monitoring a hydrogen-cooled generator includes a skid having a platform and an upwardly extending support. The support is attachable to a hydrogen gas purity monitoring module, a generator overheat monitoring module, a hydrogen gas dryer module... | 11/01/2005 |
| 6943470 | Air gap baffle assembly for gas-cooled turbine generator and method of installing A gas-cooled turbine generator includes a rotor having baffles arranged in rings and defining a plurality of gas cooling zones. A stator core has stator slots in a bore in which the rotor is received. A plurality of air gap baffle assemblies are arranged in segmente... | 09/13/2005 |
| 6943469 | Supplemented zonal ventilation system for electric generator An electrical generator (80) utilizes supplemental blowers or fans (140) to move additional cooling fluid through coolant flow paths (116, 124) in the generator, thus reducing the internal temperature of the generator. The supplemental blower co... | 09/13/2005 |
| 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 |
| 6825584 | High-voltage electric rotary machine and a method for cooling the conductors of said machine The aim of the invention is to ensure efficient coolilng in an electric rotary machine (2), in particular in a high-voltage generator. To achieve this, the invention provides a coolant channel (10) which extends in a radial direction and in which a num... | 11/30/2004 |
| 6803688 | Isolation of generator bearing housing from generator enclosure and methods therefor The bearing housing of an electrical generator is isolated from the interior of the generator enclosure by forming a cavity in the generator end wall with a seal between the generator end wall and the rotor. By sealing the bearing housing from the interior of the en... | 10/12/2004 |
| 6795720 | High temperature superconducting synchronous rotor coil having multi-piece rotor core A rotor for a synchronous machine comprising: a superconducting field winding assembly having a coil winding and at least one winding support extending between opposite sides of the winding, and a rotor core formed of a plurality of rotor core sections, each of said... | 09/21/2004 |
| 6759770 | Cooling system for modular field windings of a generator Modular field windings including multiple coils are provided about a rotor core. Axially spaced spacers maintain the coils circumferentially spaced from one another, the spacers and coils defining radially directed openings in the rotor. Flow directing elements are ... | 07/06/2004 |
| 6727609 | Cooling of a rotor for a rotary electric machine A high-power electrodynamic machine has a relatively elongated rotor. In a preferred generator embodiment, a rotor having a winding formed integral therewith is integral to a hollow shaft mounted within a stator having a plurality of windings. The shaft has an axial... | 04/27/2004 |
| 6727610 | Generator having flange baffle and method for controlling ventilation flow In an electromagnetic generator with a reverse-flow ventilation scheme, a baffle structure is provided to guide the outside space block cooling gas all the way to the stator core inner diameter. The baffle structure helps cool the first package by preventing hot air... | 04/27/2004 |
| 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 |
| 6707179 | Protected seal and related methods for sealing fluid in power generation system An apparatus having a slidable seal and related methods to prevent leakage of hydrogen gas or other fluids in a power generator is provided. The seal can connect to a high-current conductor when slidably contacting the surface of a fluid channel formed around the co... | 03/16/2004 |
| 6489701 | Superconducting rotating machines A superconducting rotating machine has a relatively compact construction while still providing a relatively high output power, thus the superconducting rotating machine has an increased power density characteristic. The superconducting rotating machine in... | 12/03/2002 |
| 6450781 | Centrifugal compressor assembly for a refrigerating system A centrifugal compressor assembly includes two centrifugal compressor stages, a diffuser duct, a plurality of collection chambers, inlet and outlet tubing, and a built-in electrical motor between the stages. The centrifugal compressor assembly is used in ... | 09/17/2002 |
| 6355995 | Motor cooling system A motor cooling system 10 for and electric motor 20 having a rotor 60, mounted on a rotor shaft 62 rotatable about a central axis and a stator 70, comprises a fluid nozzle 100 extending through an aperture disposed in said motor 20 having an inlet 104 ori... | 03/12/2002 |
| 6211586 | Gas-cooled electrical machine In a gas-cooled electrical machine, the conductor bars (3, 4) in the winding overhang are cooled directly by a flow element of the cooling gas flow which is passed through cooling channels (8) located within the eyes (5a, 5b) of the bar ends. To this end,... | 04/03/2001 |
| 5808387 | Electric motor for an electric vehicle It is an object of the present invention to provide an electric motor for an electric vehicle with an improved cooling capacity by causing coils wound around a stator to serve as a tubular heat pipe type heat transfer device. An electric motor for an elec... | 09/15/1998 |
| 5785114 | Integral hydrogen cooler assembly for electric generators Hydrogen coolers are provided with a cooler frame; cooling tubes positioned within the cooler frame; a tube bundle: an inlet chamber adjacent to an inlet end of the tube bundle; a reverse chamber adjacent to the reverse end of the tube bundle; and a suppo... | 07/28/1998 |
| 5753986 | Explosion proof for electric motor A bearing 12 is provided on the end portion of a housing 30. This bearing 12 supports a shaft 14. A magnetic circuit 15, 16 for driving the shaft 14 is provided between the shaft 14 and the housing 30 with a gap 29 passing through in an axial direction. A... | 05/19/1998 |
| 5703421 | Reluctance generator/motor cooling A reluctance motor/generator apparatus capable of operation at high rates of revolu-tion and high energy densities with reduced cooling-related windage losses and without incurring thermal damage to motor/generator elements. The apparatus includes an elec... | 12/30/1997 |
| 5602435 | Gas-cooled electrical machine In the case of a gas-cooled electrical machine, the effective flow cross-section of the connection from the outer hot-gas chambers to the cooler is provided with an adjustable restrictor device (29, 31; 32, 33). In this way, the splitting of the various c... | 02/11/1997 |
| 5477095 | Rotor of a turbogenerator having direct gas cooling of the excitation winding A rotor of a turbogenerator having direct gas cooling of an excitation winding conductor. An insulating strip is provided between a slot base and the excitation winding conductor. A resiliently elastic intermediate layer, which may be in a form of a corru... | 12/19/1995 |
| 5285123 | Turbo-generator A turbo-generator has a tapering cooling part positioned between a vapor turbine part and a generator part, and casings of these parts are combined together to form a sealed single-boundary structure. A turbine shaft in the vapor turbine part, a rotary sh... | 02/08/1994 |
| 5283488 | Rotor cooling structure A rotor structure for an electrical generator, motor or the like is described which comprises a rotatable generally cylindrically shaped heat pipe defining an internal vapor chamber having an evaporator end and a condenser end, a plurality of radial fins ... | 02/01/1994 |
| 5276374 | Gas-cooled electric machine In the gas-cooled electric machine, the stator winding bars, which are connected to one another electrically and mechanically outside the stator core assembly (2) in the overhang space by means of metallic lugs, are provided with caps (8) which virtually ... | 01/04/1994 |
