Patent application number | Description | Published |
20080309177 | GAS-COOLED ELECTRICAL DEVICE - The invention relates to a gas-cooled electrical device ( | 12-18-2008 |
20100079030 | ROTOR FOR AN ELECTRIC MACHINE - A rotor for an electric machine includes a rotor yoke having a plurality of axial winding slots distributed on an outer periphery of the rotor yoke; a winding bar disposed in one of the plurality of axial winding slots, the winding bar having at least one winding end emerging axially from the rotor yoke so as to form an end winding; and a retaining device including a plurality of radial bolts, each of the plurality of radial bolts having a head fixedly connected to a shank, wherein the retaining device retains the end winding against a centrifugal force acting on the end winding. | 04-01-2010 |
20120104896 | ROTATING ELECTRIC MACHINE - A rotating electric machine includes a rotor configured to rotate about an axis. The rotor includes a rotor laminate stack having layered laminations pressed in an axial direction to form a composite, the rotor laminate stack being radially divided into an inner mechanical region and an outer electrical region. A rotor winding is disposed in the electrical region of the rotor laminate stack. A stator concentrically surrounds the rotor. A press plate is configured to press the layered laminations in the axial direction, the press plate being radially divided into a separate inner press plate and a separate outer press plate so as to correspond to the radial division of the rotor laminate stack. | 05-03-2012 |
20120112601 | ROTATING ELECTRIC MACHINE - A rotating electrical machine includes a rotor configured to rotate about an axis. The rotor includes a rotor lamination stack having a plurality of sheets pressed into a composite assembly in an axial direction and being radially divided into an inner mechanical part and an outer electrical part. A rotor winding is disposed in the electrical part of the rotor lamination stack. A stator is concentrically surrounding the rotor. A plurality of shear bolts is disposed in the mechanical part and configured to reach through the rotor lamination stack. A plurality of further bolts is disposed in the electrical part, the plurality of shear bolts and a plurality of further bolts being configured to press the plurality of sheets in the axial direction. | 05-10-2012 |
20120119628 | ELECTRICAL MACHINE COMPRISING A ROTOR, A STATOR AND AN AIR GAP BETWEEN ROTOR AND STATOR - An electrical machine configured to operate at a power range of several MVA includes a rotor is configured to rotate about a rotor axis. The rotor includes a rotor lamination stack. A stator includes a stator lamination stack concentrically surrounding the rotor lamination stack, wherein a ring-like air gap separates the rotor lamination stack from the stator. An air gap monitoring device extends through the air gap in an axial direction and is configured to detect at least one of a change in a rotor geometry and a presence of debris in the air gap. | 05-17-2012 |
20120146450 | ELECTRICAL MACHINE WITH A RESTRAINT SYSTEM FOR A ROTOR WINDING HEAD - An electrical machine configured to operate in a power range of several MVA includes a rotor configured to rotate about an axis. The rotor includes a rotor winding disposed in a rotor lamination stack and having an exposed winding head outside of the rotor lamination stack. The winding head includes a winding head retention system having a plurality of radially oriented retention elements each including a locking device configured to secure a respective one of the retention elements against at least one of an unintentional loosening and a flying away in an event of a breakage. | 06-14-2012 |
20120200194 | SLIP-RING ARRANGEMENT FOR A ROTATING ELECTRICAL MACHINE - A slip-ring arrangement of a rotating electrical machine includes a plurality of slip-rings disposed concentrically about an axis of the electrical machine one behind the other in an axial direction, the plurality of slip-rings configured to be self-supporting. | 08-09-2012 |
20130328422 | ROTOR FOR AN ELECTRIC MACHINE AND METHOD FOR RETROFIT - The rotor for an electric machine comprises a shaft, a spider on the shaft, a laminated drum on the spider. The spider has a plurality of apart elements defining ducts between each other. The laminated drum has a plurality of cooling channels connected to the ducts. The rotor also has throttle elements associated to at least one duct and/or cooling channel. | 12-12-2013 |
20140292136 | ROTATING ELECTRIC MACHINE, IN PARTICULAR DOUBLE-FED ASYNCHRONOUS MACHINE WITH A POWER RANGE OF BETWEEN 20 MVA AND 500 MVA - The invention proceeds from a rotating electric machine, in particular a double-fed induction machine in the power range between 20 MVA and 500 MVA, which comprises a rotor that rotates about a machine axis, is concentrically surrounded by a stator, and has a rotor plate body and a shaft, which rotor plate body bears a rotor winding that is arranged further outwards and is connected by means of connectors to slip rings that are arranged further inwards at the end of the shaft. A flexible and secure connection is achieved in that the connectors have mechanical connectors that run at right angles to the shaft to absorb forces arising owing to centrifugal acceleration, which mechanical connectors are connected on one side to a rotor winding head of the rotor winding and are supported on the other side on an auxiliary rim on the rotor plate body. | 10-02-2014 |
Patent application number | Description | Published |
20120068561 | AIR-COOLED MOTOR-GENERATOR AND METHOD FOR OPERATING A MOTOR-GENERATOR - An air-cooled motor-generator ( | 03-22-2012 |
20130038166 | ROTATING ELECTRICAL MACHINE - A rotating electric machine includes a rotor, having a rotor laminate stack extending in the direction of a machine axis and having a rotor winding, the rotor winding forming a winding head at each of the ends of the rotor laminate stack, said winding head being fastened to a winding head rim, which is arranged concentrically within the winding head and adjoins the rotor laminate stack in the axial direction, in order to intercept centrifugal forces by means of bolts passing radially through the winding head, and a fastening designed to safely absorb axial expansions of the winding head. Simple and secure fastening is achieved by virtue of the bolts being fastened to the winding head rim in each case on a T-shaped hammer profile, which extends in the axial direction and is mounted in axially movable fashion in an associated axial T-shaped slot in the winding head rim. | 02-14-2013 |
20130038167 | ROTATING ELECTRICAL MACHINE - A rotating electric machine, e.g. hydrogenerator, includes a rotor, including a rotor laminate stack extending in a machine axis direction and having a rotor winding which forms a winding head at each of the ends of the rotor laminate stack. The winding head is fastened to a winding head rim, which is arranged concentrically within the winding head and adjoins the rotor laminate stack in the axial direction, to intercept centrifugal forces by bolts passing radially through the winding head, and a fastening designed to safely absorb axial expansions of the winding head. Simple and secure fastening is achieved by the bolts being fastened to the winding head rim in each case on a T-shaped hammer profile, which extends axially and is mounted, axially movable, in a T-shaped groove in the winding head rim, additional couplers are provided that transmit axial expansions of the winding head onto the hammer profile. | 02-14-2013 |
20130057228 | METHOD FOR MONITORING THE FUNCTION OF A ROTATING ELECTRIC MACHINE AND MONITORING SYSTEM FOR CARRYING OUT SAID METHOD - A method is provided for monitoring the function of a rotating electric machine, operating between 20 and 500 MVA, which includes a rotor, surrounded concentrically by a stator, the rotor and the stator having rotor and stator lamination elements made from sheets layered and pressed in the axial direction to form a composite and pressed by electrically insulated tension bolts passing through the rotor and stator lamination elements in the axial direction and insulated with respect to the lamination elements. Simple and reliable monitoring of the insulation of the tension bolts is achieved since the tension bolt insulation is electrically measured continuously during operation of the machine, the tension bolts each being set to a predetermined potential with respect to the associated lamination element by a voltage source, and the current flow through the voltage source and/or through the respective tension bolt being measured and evaluated. | 03-07-2013 |