Abstract: A housing-free dynamoelectric rotary machine includes a stator having a substantially hollow cylindrical magnetically conductive body which includes a plurality of jaws which are distributed on an outer circumference of the magnetically conductive body and arranged in a shape of pincers such that two of the jaws in opposite relation to one another form an axially extending channel structure. A mounting element is receivable in the channel structure and moveable axially and/or about its own axis in the channel structure. A connecting element connects the mounting element to an add-on element in such a way that a complementary contact region of an outer section of the jaws and a corresponding surface of the add-on element result in at least one section to realize a wedge effect on the complementary contact region. A rotor mounted for rotation about an axis is spaced apart from the stator by an air gap.

Abstract: Various embodiments of the teachings herein include an electric motor. An example includes: a stator having a plurality of field conductors; a plurality of inverters to control the field conductors arranged on one or more circuit boards; wherein the one or more circuit boards are arranged on a cooling plate; and a heat tube with an evaporator side arranged in the cooling plate and a condenser side arranged outside the cooling plate.

Abstract: Some examples of the teachings herein include enamel-insulated wires. An example system includes: a round electrical conductor; and a wire enamel surrounding the electrical conductor. A layer of thermally unstable material includes at least one of: a lubricity constituent as topmost layer and/or a thermally unstable layer as a penultimate layer of the wire enamel directly bordering the surface.

Abstract: A squeeze film damper includes an inner ring, an outer ring, and a plurality of bars designed to connect the inner ring and the outer ring. At least one of the inner and outer rings includes a flange, with individual ones of the plurality of bars being connected only to the flange.

Abstract: In a method for operating a cable, a sensor arranged in the cable generates sensor signals, when the sensor detects a use of the cable. The sensor signals are evaluated based on operating data relating to past and/or future data and a characteristic is produced for the cable based on the sensor signals.

Abstract: A drive includes a dynamo-electric rotary machine arranged in the housing and including a stator, a winding system arranged in the stator, and a rotor separated from the stator by an air gap, with the stator and the rotor being located in a motor interior. A B-side pot-shaped bearing shield includes a bearing supporting the rotor for rotation about an axis. A converter is situated in a converter installation space which is radially surrounded at least in one section by the B-side bearing shield.. The converter is arranged, as viewed axially, between the dynamo-electric rotary machine and the bearing of the B-side bearing shield and has at least one component, such as power semiconductor, capacitor, control and regulating unit, and communications unit, which is thermally conductively connected to the B-side bearing shield. A choke body separates the motor interior and the converter installation space and includes chokes.

Abstract: In a method for producing a rotor of a dynamo-electric machine, a magnet pocket and flux barriers are formed in an axial circumferentially closed recess of a laminated core for receiving a permanent magnet with two opposite flux barrier sides facing flux barriers, a delivery side and a thrust side on two opposite sides, and an air gap side and an axle side. Portions of the delivery side and/or adjoining regions of a side in a magnetic flux are formed of curved or fluidic configuration. Adhesive is added to the delivery side and the permanent magnet is pushed with the delivery side axially into the magnet pocket such that the adhesive is distributed via a gap between the air gap side and the magnet pocket and a gap between the axle side and the magnet pocket without wetting the flux barriers, thereby bonding the permanent magnet in the magnet pocket.

Abstract: An electric motor includes a stator having a plurality of bar-shaped field conductors. A cooling plate is arranged such that the field conductors are mechanically operatively connected to the cooling plate via current conductors that are electrically connected to the field conductors. The cooling plate is segmented into at least two sub-segments, which are electrically insulated from one another and annular or designed in a form of annular sectors. A separating surface between the sub-segments represents less than 20% of a cooling surface. A printed circuit board structure having one or more printed circuit boards, with at least one of the printed circuit boards being arranged on the cooling plate. The printed circuit boards are electrically contacted to the sub-segments of the cooling plate in order to supply power. A plurality of power electronics components controls the field conductors and is arranged on the printed circuit board structure.

Abstract: A drive system includes a power circuit (600, 700, 800) with a plurality of power cells supplying power to output phases (A, B, C), each output phase including a phase group of series-connected power cells, a voltage source power supply, and a bypass mechanism (650, 750, 850) comprising spare power cells and bypass contactors, wherein the phase groups of the power circuit are connected at a point of common coupling, and wherein a spare power cell is installed at the point of common coupling.

Abstract: A multiphase drive system comprises a multiphase drive including a stator and converter modules and having an input DC voltage of less than 100 V and a rated power of more than 300 kW. Each converter module supplies power to stator bars such that voltage or current of each bar is controlled separately by one converter module. An energy supply device is electrically connected to connections of the multiphase drive and generates a DC voltage for supply to the multiphase drive from an AC voltage. The energy supply device includes a voltage converter, a line section between voltage converter and the connections of the multiphase drive for transmitting electrical energy to the multiphase drive, and a rectifier. The voltage converter steps down voltage generated by the rectifier to a voltage of less than 100 V. The rectifier and parts of the multiphase drive are cooled using a same cooling principle.

Abstract: A multilevel converter (300, 310) includes a plurality of power cells (302, 304) receiving power from a source and supplying power to multiple output phases (U, V, W), wherein each output phase (U, V, W) includes a high voltage power cell (302) that is designed to output more than three voltage levels.

Abstract: An electrical power supply system, in particular for a microgrid, includes a DC bus, and a first rectifier and a second rectifier, with the first and second rectifiers each supplying power to the DC bus. The first rectifier is a diode rectifier and the second rectifier has switchable power semiconductors. The electrical power supply system further includes a generator supplying power to both rectifiers. The rectifiers can be connected at different times according to a load.

Abstract: A method for producing a rotor of an asynchronous machine includes providing a rotor lamination stack having grooves extending parallel to a rotor axis of the rotor, inserting conductor rods into the grooves such that the conductor rods protrude from end faces of the rotor lamination stack, wherein a twisting tool is placed at each of the end faces onto the protruding conductor rods and the twisting tools are twisted relative to each other, where the parallel grooves with the corresponding conductor rods also extend obliquely after the twisting and where the twisting tools are formed such that the protruding conductor rods remain parallel to the rotor axis when an oblique profile of the stack is produced, removing the twisting tools, providing first and second short-circuit washers, and axially pressing the short-circuit washers onto the conductor rods projecting perpendicularly from the end face of the rotor lamination stack.

Abstract: A slot wedge for a slot in a stator of a dynamoelectric machine, wherein the slot wedge is formed as a longitudinally extending strip of insulating material, where the strip is provided with a punched portion.

Abstract: A solar group unit includes at least two solar units. Each of the solar unit includes plurality of solar modules which are each arranged in a carrier unit. A connecting point to an electrical connection is arranged between two of the solar modules that are arranged in a series circuit. The carrier unit is at least partially electrically conductive and is electrically conductively connected to the connection point. The solar units are arranged electrically in series in order to transmit the generated electrical power. The carrier units of the respective solar modules are arranged such as to be electrically insulated from one another by an insulator which is embodied as a component.

Abstract: In a method for detecting a fault in a machine, a vibration signal recorded by one or more sensors sensing a vibration of the machine is received. A true fault signal is determined by applying to the vibration signal a neural network which is an unsupervised neural network, and an envelope spectrum analysis is applied to the true fault signal to detect the fault. The unsupervised neural network is designed to determine the true fault signal such that an impulsive component in the true fault signal is maximized, and is designed to determine the true fault signal such that a difference between the true fault signal and the vibration signal is minimized.

Abstract: A rotor of a dynamo-electric permanently excited machine has a predefinable number of poles, with the laminated core having laminations, which each form sectors with at least two different configurations in a predefinable axial order and rotation or axial order and rotation and overlap. The laminations, independent of the configuration of the sectors, each have a shaft bore, an identical number of poles or sectors, axially aligned cut-outs and an identical outer diameter. Sectors of a first configuration have elements for distributing a potting compound or an adhesive within the laminated core, and sectors of a second configuration have retaining elements for mechanical strength of the laminated core. The flux barriers and gaps running substantially axially between the permanent magnets and the laminated core surrounding same, are filled with the adhesive and/or a potting compound.

Abstract: Various embodiments include an insulation material and/or impregnation resin for a wrapping tape insulation, comprising: a base resin curing to a thermoset; and a curing agent. The base resin comprises a siloxane-containing compound forming a —SiR2—O— backbone in the thermoset.

Abstract: A rotor of a rotary dynamoelectric machine incudes a magnetically conductive body, having substantially axially running slots distributed around the circumference. A squirrel cage includes electrical conductors which are arranged in the slots. The electrical conductors are electrically contacted at the two end faces of the rotor by short-circuit rings. The magnetically conductive body includes a base body and at least two further additional bodies, which axially adjoin the base body. A first one of the at least two additional bodies directly axially adjoins the end face of the base body, and a second one of the at least two additional bodies and optionally any further additional body axially adjoin the first additional body. The slots have radially exposed slot portions in the axial end regions of the rotor such that the conductors can be moved radially outward.

Abstract: A system, apparatus and method for estimating remaining useful life of at least one bearing is provided. The method includes receiving request for analyzing defect in bearing from source, determining vibration spectrum of bearing from the received operational data, monitoring an impact of defect on one bearing over a period of time based on the determined vibration spectrum, determining characteristic values from the vibration spectrum for which the impact of the defect on the bearing is above a threshold range, determining impact force during an operation of the at least one bearing based on the determined characteristic values and one or more parameters obtained from a virtual bearing model, determining remaining useful life of the bearing based on the determined impact force during the time period and generating a notification indicating the remaining useful life of the bearing on output device.