Abstract: A cooling system for a drive device with several electric machines, the cooling system including a hydraulic circuit for a coolant including a cooling part in a gearbox of the drive device for cooling the gearbox, and an air/coolant heat exchanger including cooling walls forming channels for circulating coolant for the cooling thereof, an air cooling circuit including a plurality of fans, rotationally coupled to the gearbox, a cooling part between the cooling walls of the air/liquid heat exchanger, wherein the air sucked in and propelled by the fans circulates by sweeping over the cooling walls in order to cool them.

Abstract: The present invention provides a portable power storage device, and in particular, a portable power storage device with a self-generation and nano-capacitor storage structure. The portable power storage device includes: opposite fixed magnet plates disposed on both sides of a main body and having a plurality of radially arranged induction magnet bodies; and a rotating coil plate disposed between the opposite fixed magnet plates and having a plurality of radially arranged coil bodies to perform mutual induction action with the induction magnet bodies, such that when the rotating coil plate is rotated or reciprocated, electric charges are induced in the coil bodies by the induction magnet bodies to generate current, thereby electricity may be easily generated and used at all times regardless of the location, as well as the stored electricity may be output and used in a portable electric device as necessary.

Abstract: A system includes an electric generator, a power electronics system, and a heat exchanger. The electric generator includes a turbine wheel, a rotor, and a stator. The turbine wheel is configured to receive process gas and rotate in response to expansion of the process gas flowing into an inlet of the turbine wheel and out of an outlet of the turbine wheel. The rotor is configured to rotate with the turbine wheel. The electric generator is configured to generate electrical power upon rotation of the rotor within the stator. The power electronics system is configured to convert the electrical power to specified power characteristics. The heat exchanger includes a first side in fluid communication with the process gas and a second side in fluid communication with a fluid stream from a second system. The heat exchanger is configured to cool the fluid stream using the process gas.

Abstract: An armature portion includes a first and second armature core, and a core coupling portion that magnetically couples the first armature core to the second armature core. The first and second armature core includes magnetic pole groups that are magnetically coupled, respectively. A first and second magnetic flux are formed in the armature portion by magnets. A first magnetic circuit in which the first magnetic flux flows includes three magnetic pole groups, magnetic field cores, and the magnets. A second magnetic circuit in which the second magnetic flux flows includes two magnetic pole groups, a core coupling structure, the magnetic field cores, and the magnets. This structure reduces magnetic saturation of the magnetic circuit formed on the armature portion and eliminate the need to magnetically divide the armature cores in the machine moving direction, thereby increasing the intensity of the armature.

Abstract: An electric machine with a low profile retention assembly for retention of a stator core is disclosed. A first housing houses the stator core. The first housing has an axial end face with a circumferentially extending, shaped profile having recessed portions that project axially inward alternating with non-recessed portions. A portion of the stator core extends axially out from the recessed portions. A core retention spring is disposed circumferentially at the axial end face of the first housing. The core retention spring has direct contact with the portion of the stator core that extends axially out from the recessed portions of the first housing and the shaped profile of the housing. The core retention spring pushes against the portion of the stator core that extends that extends axially out from the first housing, imparting one or more of an axial load and radial load into the stator core.

Abstract: A method for determining a first setpoint for a first vector component of the phase currents along a first axis of a rotating reference frame connected to a rotor of the electric generator, and a second setpoint for a second vector component of the phase currents along a second axis of the rotating reference frame. The second vector component of the phase currents is to bring about defluxing of the rotor; and controlling the rectifier on the basis of the first and second setpoints for the vector components of the phase currents. The first setpoint for the first vector component of the phase currents is determined on the basis of an external feedback loop designed to feedback-control a voltage on a DC bus or to regulate a current from a battery connected to the DC bus.

Abstract: A drive system includes a motor and a gearbox. A three-bearing architecture is used to constrain a rotor shaft of the motor and a gear shaft of the gearbox. A first bearing interfacing with the gear shaft, a second bearing interfacing to the rotor shaft, and a central bearing are arranged between the first and second bearings. The central bearing includes a first race section configured to interface with the gear shaft and a second race section for interfacing to the rotor shaft. The first race section and the second race section are separate from each other and may be axially proximate to each other. The gear shaft includes a first section configured to interface with an inner race of the central bearing, and a second section configured to interface with the rotor shaft. The first and second sections are separate and may include the same pitch circle diameter.

Abstract: A stator for an electric machine is disclosed. The stator has a plurality of pins arranged in slots in the stator on concentric circles at different distances from a center point, each concentric circle forming a layer. Each of six pins in different layers are connected to one another in series and form a winding. A first pin of the winding in a first slot in the 6n-4 layer, n being a natural number, a second pin of the winding in a second slot in the 6n-5 layer, a third pin of the winding in the first slot in the 6n-2 layer, a fourth pin of the winding in the second slot in the 6n-3 layer, a fifth pin in the first slot in the 6n layer, and a sixth pin of the winding in the second slot in the 6n-1 layer.

Abstract: A plurality of plate-like magnets are positioned in a radial direction and an axial direction and are arranged at a predetermined interval to an inner circumferential surface of a rotor yoke, and a first adhesive is cured, thus forming each partition part that partitions the plate-like magnets from each other and partially bonding the plate-like magnets at a first bonding part, and a second adhesive is cured, thus bonding and fixing the plate-like magnets at a second bonding part while the plurality of plate-like magnets are partitioned from each other at a predetermined interval in a circumferential direction by the partition part.

Abstract: Various embodiments of the teachings herein include an electric motor. In some embodiments, the motor includes: a stator; and a moving component comprising an iron-based soft-magnetic structural material including crystallites of a ferromagnetic iron-based alloy separated by grain boundaries, wherein there is interlayer-free contact between the crystallites at grain boundaries. The structural material comprises ceramic fibers. A content of the ceramic fibers is between 0.2% and 10% by volume. An aspect ratio of the ceramic fibers is less than 0.1.

Abstract: A powertrain, a coolant flow rate estimation method, and an electric vehicle are provided. Coolant in a first cooling loop of the powertrain is configured to cool an inverter. An electronic pump drives the coolant to circulate in the first cooling loop. When a phase current of a motor is greater than or equal to a preset current value, a controller determines a rotation speed of the electronic pump at a first moment as a first rotation speed, and determines a coolant flow rate at the first moment based on a temperature at a first position in the first cooling loop, a temperature at a second position in the inverter, and a power loss of the inverter. In the solution of this application, data does not need to be separately calibrated for different thermal management systems. This reduces time consumed by data calibration and improves practicability.

Abstract: The invention relates to a housing (1), in particular for an electric drive system for a vehicle, wherein the housing (1) is configured as a system housing and is provided for receiving a plurality of system components, and wherein the housing (1) has a housing wall (11) which is produced by way of a casting mould, and a plurality of interfaces for connecting the housing (1) to components which are situated outside or inside the housing (1) are provided in or on the housing wall (11). Furthermore, the invention relates to the use of a housing (1) as a system housing for an electric drive axle of a motor vehicle.

Abstract: A liquid-cooled rotor for an electromechanical energy converter has a rotor shaft designed, at least in portions, as a hollow shaft and having a first, open axial end, a liquid-guiding device extending through the first end into the rotor shaft, wherein an annular liquid space is between the liquid-guiding device and the rotor shaft in the radial direction, and the liquid-guiding device has an interior space for guiding liquid and a liquid inlet opening into the interior space and arranged at a first axial end of the liquid-guiding device, the liquid-guiding device, at a second axial end, is received in the rotor shaft and guiding relative to the rotor shaft, and has a liquid outlet opening fluidically connecting the interior space to the annular liquid space, and the liquid outlet opening is between the first and second ends of the liquid-guiding device in the axial direction.

Abstract: A rotor of a rotating electrical machine includes a plurality of poles each extending on a first axis that is radial with respect to the rotor and on a second axis parallel to the rotor with respect to the rotor, each pole comprising a pole body, a rotor winding for each pole, positioned against the body of the pole, the rotor winding taking the form of a strip extending over the length of the pole body on the radial first axis wound against the pole body, a plurality of closure shims, a closure shim of the plurality of closure shims being in contact with a rotor winding associated with a pole body, the closure shim being configured to exert a pressure on the rotor winding towards the pole body.

Abstract: A rotor for an electric motor includes a rotor shaft rotatably mounted about an axis; and a lamination stack mounted coaxially on the rotor shaft. The lamination stack includes inner cavities; permanent magnets housed inside the inner cavities of the lamination stack; and a front flange and a rear flange mounted coaxially on the rotor shaft and arranged axially on either side of the lamination stack. At least one amongst the front flange and the rear flanges is equipped with at least one sensor.

Abstract: A transport device can be moved over a floor in order to transport at least one object and/or one person by means of at least one rolling device (3). A drive element (4) can be rotated at least indirectly using the rolling device (3). The drive element (4) comprises at least two drive magnets (12). An output element (7) is provided which has at least two output magnets (15). The number of drive magnets (12) differs from the number of output magnets (15). At least one non-magnetic shielding element (5) is provided in order to change the orientation of a magnetic field located between the chive element (4) and the output element (7). The output element (7) can be rotated. At least one stator winding (8) is arranged in which the output element (7) can be rotated about an axis of rotation (11) in order to generate electric current.

Abstract: The invention relates to an electric machine comprising a permanent magnet arrangement and an electromagnetic arrangement. The electromagnetic arrangement comprises a first number of excitation coils, each excitation coils being wound around a pole core. The permanent magnet arrangement comprises a second number of magnet segments formed of a permanently magnetic material. An air gap is arranged between the electromagnet arrangement and the permanent magnet arrangement. The magnet segments have a permanent magnetisation in a first magnet segment volume. At least one magnet segment comprises a demagnetised region in a second magnet segment volume.

Abstract: A motor-integrated inverter coupled in a shaft direction of a motor is provided, the motor-integrated inverter including: a power module generating driving electric power for driving the motor; and a cooler arranged to avoid an extension line of the shaft of the motor, the cooler including an outer side part and an inner side part communicating with each other while being spaced apart from each other in a direction in which the shaft of the motor extends, thereby defining a double structure, wherein the power module is disposed between the outer side part and the inner side part, the outer side part has an inlet port provided at one side thereof such that a refrigerant is introduced, the outer side part has an outlet port provided at the other side thereof such that a refrigerant is discharged to the outside.

Abstract: A stator for an electric machine comprises a stator core and a winding positioned on the stator core. The stator core includes a plurality of teeth defining a plurality of slots. The winding is comprised of a plurality of segmented conductors connected together to provide a plurality of parallel paths per phase for the winding, each conductor comprising (i) an end loop provided on a crown end of the stator core, (ii) two legs extending through the slots, and (iii) two leg ends extending out of the slots on a connection end of the stator core, each leg end having a twist portion. The legs of the conductors are arranged in layers in the slots, wherein the layers include a total number of layers (L), L being greater than five and L/2 being an odd whole number. Each leg end extending from each of the layers has a common twist associated with the layer from which said leg extends.

Abstract: A stator (2) for an electric machine (1) includes a laminated core (3) arranged axially between a first end plate (4) and a second end plate (5). A cooling line (6) for introducing a coolant into at least one distribution duct (7) at the particular end plate (4, 5) is arranged outside the end plates (4, 5) and the stator (2) and is fluidically connected to the at least one distribution duct (7) in the particular end plate (4, 5). The laminated core (3) includes multiple axial ducts (8) for guiding the coolant through the stator (2). The axial ducts (8) are fluidically connected to the at least one distribution duct (7) in the particular end plate (4, 5) for the inflow of the coolant. An outflow for the coolant is formed by at least one end-face opening (9) in the particular end plate (4, 5). The at least one opening (9) is configured for spraying the coolant out of the axial ducts (8) onto winding overhangs (10) of the stator (2).