Abstract: A blocking element for a rotor head winding of a turbogenerator has a form which is adapted to the contour of the adjacent conductor of the rotor head winding. A depression extending in the axial direction is made in the side of the blocking element facing the conductor, which depression forms a serpentine channel for a cooling fluid from an inlet port on the small radius to a discharge port on the highest radius, with the discharge port communicating with a ventilation bore of the rotor cap enclosing the rotor winding head. An improved cooling effect with a reduced flow of cooling fluid and an increase in the efficiency of the turbogenerator as a whole results.

Abstract: The invention relates to a control system for reducing rotor vibrations, in particular the variability thereof, in shafting, in particular turbine shafting, in which the temperature of the bearing (6) of the shaft is measured and the oil (8) supplied to the bearing is adjusted to a temperature as is assigned as the output variable in an allocation for minimised rotor vibrations with the measured temperature of the bearing as the input variable. The allocation can, for example, be provided by an initial measurement of the rotor vibrations or by a self-learning system. According to the invention, the variability of the rotor vibrations is restricted.

Abstract: In a rotating electrical machine, in particular a generator, different components, such as, for example, rotor, stator rod and end zone, are cooled as required by associated external fans, whereby the cooling power requirement is reduced. The method for cooling includes a plurality of cooling fans arranged for cooling different components of the machine, wherein a cooling fan is individually controlled in its cooling performance in accordance with the temperature of the associated component.

Abstract: A blocking element for a rotor head winding of a turbogenerator has a form which is adapted to the contour of the adjacent conductor of the rotor head winding. A depression extending in the axial direction is made in the side of the blocking element facing the conductor, which depression forms a serpentine channel for a cooling fluid from an inlet port on the small radius to a discharge port on the highest radius, with the discharge port communicating with a ventilation bore of the rotor cap enclosing the rotor winding head. An improved cooling effect with a reduced flow of cooling fluid and an increase in the efficiency of the turbogenerator as a whole results.

Abstract: A magnetic core for an electromagnetic transducer having magnetic steel laminates that are stacked in layers is provided. The magnetic core includes at least one slot that is formed in at least one of the magnetic steel laminates. The at least one slot is free of electrically conductive material. A stator including a magnetic core of this kind, a rotatable electrical machine including a stator of this kind, and a vehicle including an electrical machine of this kind are also provided.

Abstract: A method for operating a steam turbine, wherein the pressure of the cooling medium in the generator is changed not only for cooling but also for increasing or decreasing the torque of the generator on the steam turbine, this being utilized for the purpose of the start-up or shut-down process.

Abstract: A rotor body for a rotor of a rotating electric machine, in particular a turbogenerator, has at least one pole axis extending perpendicularly to a longitudinal center axis of the rotor body. At least one section of the rotor body has at least two layers produced from different materials, which layers are arranged in alternation, wherein the materials differ from each other with respect to the electrical conductivity thereof. A layer sequence direction of a layer structure formed by the layers extends perpendicularly to the pole axis and to the longitudinal center axis.

Abstract: In a rotating electrical machine, in particular a generator, different components, such as, for example, rotor, stator rod and end zone, are cooled as required by associated external fans, whereby the cooling power requirement is reduced. The method for cooling includes a plurality of cooling fans arranged for cooling different components of the machine, wherein a cooling fan is individually controlled in its cooling performance in accordance with the temperature of the associated component.

Abstract: A method for operating a steam turbine, wherein the pressure of the cooling medium in the generator is changed not only for cooling but also for increasing or decreasing the torque of the generator on the steam turbine, this being utilized for the purpose of the start-up or shut-down process.

Abstract: The invention relates to a control system for reducing rotor vibrations, in particular the variability thereof, in shafting, in particular turbine shafting, in which the temperature of the bearing (6) of the shaft is measured and the oil (8) supplied to the bearing is adjusted to a temperature as is assigned as the output variable in an allocation for minimised rotor vibrations with the measured temperature of the bearing as the input variable. The allocation can, for example, be provided by an initial measurement of the rotor vibrations or by a self-learning system. According to the invention, the variability of the rotor vibrations is restricted.

Abstract: A method for supplying an excitation current to an excitation winding of a rotor of a three-phase generator of a system for producing a three-phase alternating voltage to be fed into a power network. A pulsed excitation current is supplied to the excitation winding if a rotational frequency of the rotor deviates from a network frequency of the power network.

Abstract: A rotor body for a rotor of a rotating electric machine, in particular a turbogenerator, has at least one pole axis extending perpendicularly to a longitudinal center axis of the rotor body. At least one section of the rotor body has at least two layers produced from different materials, which layers are arranged in alternation, wherein the materials differ from each other with respect to the electrical conductivity thereof. A layer sequence direction of a layer structure formed by the layers extends perpendicularly to the pole axis and to the longitudinal center axis.

Abstract: A device for deflecting at least a portion of a cooling fluid flowing axially in an intermediate space is arranged between a rotor and a stator of a rotating electrical machine, in particular of a turbogenerator, wherein at least one blade can be arranged on a prespecifiable section of an outer face of the rotor and in the intermediate space, which blade is designed and can be arranged in such a way that a portion of the cooling fluid flowing in the intermediate space can be radially deflected in the direction of the stator by said blade.

Abstract: An electric machine having a stator and a rotor arranged on an axis of rotation and a first fan, which extends in the radial direction on one section of the axis of rotation and delivers a coolant flow into the electric machine during operation. The electric machine further includes a fan directing element, which interacts with the first fan and deflects at least a proportion of the coolant flow. Variable and demand-based cooling of the electric machine can be achieved by the fan directing element, which can in particular be adjustable.

Abstract: A cooling device for an electric motor includes at least one closed capillary tube, within which a cooling fluid is located and which is introduced into an opening of a lamination stack of the electric motor such that the capillary tube is connected to the lamination stack to conduct heat and partially projects out of the lamination stack, such that the capillary tube has a cold end disposed outside and a hot end disposed inside the lamination stack. The cooling fluid and the degree of filling of the capillary tube with the cooling fluid is chosen such that an input of heat from the lamination stack into the capillary tube leads to evaporation of the cooling fluid, and the cold end of the capillary tube is cooled such that vapor produced during the evaporation condenses and heat input into the capillary tube is dissipated out of the capillary tube.

Abstract: A rotor body for a rotor of a rotating electrical machine, having a plurality of rotor teeth which are arranged in a manner distributed over the circumference and run in an axial manner, axially running receiving slots for receiving in each case one conductor section of a rotor winding of the rotor being arranged between the rotor teeth. At least one slot is arranged on at least one radial side wall of at least one rotor tooth, the slot having at least one axial slot section, which extends from an end side of the rotor body at least partially axially over a prespecified subsection of the rotor body, and at least one radial slot section, which is connected to the axial slot section so as to communicate with it and extends from the axial slot section at least partially radially to an outer casing surface of the rotor body.

Abstract: A turbine generator of the reverse-flow type having a rotor winding and a stator winding and a cooling duct, wherein the cooling duct is designed as a diffuser. The diffuser is designed such that a device is arranged on an internal cooling duct wall, which device prevents the flow of the cooling medium from stalling, leading to an improved, more uniform flow to a cooling apparatus.

Abstract: A generator for a power plant and a method for cooling the generator, where the generator includes a stator and a rotor, the stator carrying conductors. The conductors for a winding overhang at least at one end of the stator and the generator has a fan for cooling the winding overhang. The fan produces a cooling air flow directed onto the winding overhang and has an axial component and a radial component.

Abstract: A steam power plant with a liquid/steam circuit includes a steam generator for converting a liquid into steam, a steam turbine and a condenser for converting the steam into the liquid, a generator and a liquid cooling system for the generator, wherein the liquid cooling system has a connection to the liquid/steam circuit via a bypass-like path of flow through which the liquid from the liquid/steam circuit can be branched out to the liquid cooling system and can be led back from the liquid cooling system to the liquid/steam circuit.

Abstract: A thermal power plant with a generator, includes a cooling system for the generator, wherein the waste heat released from the generator on cooling can be used profitably for operating the thermal power plant, including drying fuel, in particular for drying coal. In a method for using waste heat of a generator of a thermal power plant, the waste heat of the generator is used for drying fuel, in particular for drying coal.