Abstract: The invention relates to a heat sink arrangement with a heat sink with a cylindrical interior, in particular a casing of an electric motor or casing part for such, with power electronics integrated into the casing or casing part, with at least one electronics component pressed against the heat sink from inside, in which there is a spring ring, mounted in such a way that a contact pressure from the spring ring and the at least one electronics component is transmitted to the heat sink, and also an electric motor and a casing part for adding to an electric motor.

Abstract: A rise in temperature of magneto coils can be suppressed, thereby improving the electrical efficiency, service life and reliability thereof. A flywheel (3) has a cylindrical portion (4), and is rotatable about an axis of rotation A—A. A plurality of magnets (7) are mounted on an inner peripheral surface of the flywheel (3) so as to rotate therewith. A stator core (10) has a plurality of teeth (12) protruded outwardly in a diametral direction, and is disposed in opposition to the magnets (7). Conductive wires are wound around the teeth (12), respectively, to form magneto coils (11). The stator core (10) has a laminated core (15) formed of a plurality of magnetic sheet steel plates laminated one over another, and a pair of end plates (16, 17) disposed so as to sandwich opposite side surfaces of the laminated core (15). At least one of the pair of end plates (16, 17) is made of aluminum whose heat radiation is higher than the magnetic sheet steel plates.

Abstract: A magnetic suspension bearing located between the spindle and stator of a rotational device includes stator magnetic units mounted on the top side and bottom side of the stator and spindle magnetic units, which are mounted on two ends of the spindle. One end of the spindle has a loading section to support the spindle. The stator magnetic units and the spindle magnetic units generate a repulsive magnetic force to separate the spindle and stator from one another at a selected distance to avoid vibration and noise caused by obliquity and to increase the service life of products.

Abstract: A rotor conductor upper portion positioned near to an outer periphery of a rotor has a trapezoidal, cross sectional shape, a rotor conductor lower portion positioned nearer to a center of the rotor than the rotor conductor upper portion has a rectangular, cross sectional shape, and the rotor conductor upper portion has a height h1=27 mm or more in the case where rotor conductors are made of brass, and a height h1=7 mm or more in the case where the rotor conductors are made of copper.

Abstract: A compact dynamoelectric machine having a rotor with a length which is less than the length of a corresponding stator core. The rotor is rotatable on a shaft supported by bearings, with at least one of the bearings being positioned longitudinally within the stator core. Two endshields define opposite ends of the machine. One of the endshields is configured for holding electronic components in arrangement integrated with the machine.

Abstract: An electric motor for blowers in motor vehicles, having a motor housing which includes as its housing components a pole housing and a bearing lid mounted on the pole housing, and having an electronics housing for receiving electronic components of an electronic unit. To lower the production costs for the electric motor, the electronics housing is embodied in two parts at least one of which is attached to a housing component of the motor housing.

Abstract: A drive unit comprises an electric motor 1, a drive unit casing 2 accommodating therein the electric motor, an inverter 3 that controls the electric motor, and a flow passage of a refrigerant that cools the inverter. The inverter is mounted on a heat sink 53 and mounted to the drive unit casing with a space R defined, and the space is communicated to the flow passage of the refrigerant. The heat sink comprises fins 56, and the drive unit casing comprises fins 22, the both fins being apart from each other. Thereby, both a side of the drive unit casing and a side of the heat sink are effectively cooled by heat exchange with a cooling refrigerant in wide areas. Also, the fins are apart from each other whereby direct heat conduction is avoided and efficient cooling is enabled with temperature gradient conformed to heat-resistant temperatures.

Abstract: A rotor assembly for use in an electric motor or generator where the mass of the rotor assembly is reduced with respect to conventional rotor assemblies. In addition, the rotor assembly is configured to be scalable to different sized electric motors. Within the rotor assembly, the rotor hub, the shaft, and the permanent magnets can independently or collectively be modified to have a reduced mass. In one aspect, a portion of the rotor hub adjacent to the shaft is configured with passages and spokes. In another aspect, an intermediate hub with lightening holes is provided between the shaft and the rotor hub. In yet another aspect, a large diameter hollow shaft replaces a portion of the rotor hub. In yet another aspect, the permanent magnets are configured to have an arc-shape, which permits the thickness of the magnets to be reduced without reducing the efficiency of the magnets.

Abstract: The invention relates to a synchronous AC electric motor with concentrated windings (2), whereby one primary side pole is comprised of a series of toothed-modules (4) with each toothed-module (4) being connected in the correct electrical phase sequence to a corresponding phase (11) of the motor electrical supply (5). In order to provide a highly optimized concentrated winding motor design applicable equally to either linear or rotating machines, which retains the performance benefits of existing concentrated-winding motors it is proposed that neighboring modules (4) are wound so as to have alternating polarities, whereby the number of toothed-modules (4) comprising a primary side pole is exactly equal to twice the number of motor phases (5), and that the motor is designed to operate using an air-gap flux component which is harmonic of the fundamental phase current frequency.

Abstract: A rotor assembly for an electric motor, including: a rotor shaft, an armature, wire windings and a commutator, wherein the rotor assembly further includes a ring cap directly connected with the commutator. The ring cap includes chip capacitors soldered on a printed circuit board through a Surface Mount Device (SMD) technique. The ring cap serves as a reservoir for absorption of any noise/sound generated from rotation of the commutator in a DC motor around its brushes. The invention enables compliance with current and future EMC requirements in, for example, the automotive industry.

Abstract: A multi-phase alternating-current rotational electric machine wherein semiconductor switching devices are electrically insulated from heat sinks, and the heat sinks are grounded to the housing and thermally separated in each phase.

Abstract: A motor holder or a lower case defines therein a circuit accommodating chamber for accommodating a control circuit device. A side wall of the motor holder or the lower case that defines the circuit accommodating chamber has a vent for ventilating the chamber. A boundary section is formed between the motor holder and the lower case. An overhang extends from the motor holder. In a section of the circumference of the lower case, the overhang continuously covers the boundary section along the outer surface of the side wall of the lower case. A bulging portion is arranged to prevent water droplets from reaching the vent from the overhang. Therefore, the motor assembly prevents the integrally assembled control circuit device from being wet.

Abstract: The invention concerns a fluid-cooled electrical machine with a housing in which are arranged a stator and a rotor with stator and/or rotor coils, wherein the electrical machine is coupled heat-conductively with a cooling device arranged on its periphery and connected with an electronic power control. The electronic power control is divided into several modules, each of which are electrically connected with at least one of the stator and/or rotor coils, wherein the modules are arranged distributed on the periphery of the electrical machine and coupled heat-conductively with the cooling device.

Abstract: Disclosed is a motor stator assembly comprising: a plurality of yokes manufactured by laminating a plurality of steel sheets having a predetermined length; and a plurality of poles engaged between the yokes and formed by molding magnetic material in a mold, on which coil is wound. In the assembly, material loss can be reduced at the time of blanking operation, and additional protector is not required. According to this, a winding radius of coil is reduced thus to reduce coil amount on the basis of a constant number of times of winding. Also, by using magnetic powder material and silicon steel, productivity is enhanced and motor efficiency is enhanced.

Abstract: A bridge (8) in conformity with a tooth opening angle of the stator (1) is provided between a permanent magnet (5) and a permanent magnet (5) in a rotor (4), so that a magnetic flux for a reluctance torque is made to pass an inner side of the permanent magnet (5). An opening angle of each of ribs (7) on both sides of the permanent magnet (5) is set to be equal to or smaller than the teeth interval opening angle and equal to or larger than a half thereof. Thereby, reluctance of the rib (7) against a magnetic flux in a circumferential direction is increased and leakage of the magnetic flux of the permanent magnet (5) is prevented.

Abstract: A rotation transmitter for rotor-excited electrical machines, in particular for synchronous generators in motor vehicles, is disclosed, which has a primary part (14) with a primary core (17) comprised of a magnetically conductive material and a primary winding (18) inserted into it, and has a coaxial secondary part (15) that can rotate in relation to the primary part (14) and has a secondary core (20) comprised of magnetically conductive material and a secondary winding (21).

Abstract: A rotor portion, which is supported rotatably with respect to a housing, rotates due to magnetic action with a magnet attached to the rotor portion by flowing electric current through an electromagnetic coil. Vibration of the rotor portion becomes large if centrifugal force is generated due to eccentricity or unbalance. Positional sensors detect the deviations. In order to eliminate the deviations, electric current flows through an electromagnetic coil, causing a force in a radial direction to act on the rotor portion. A bearing device capable of correcting minute shaft deviations is thus obtained.

Abstract: The invention concerns an electric drive device, namely a transverse flow motor. The transverse flow motor has a stator and a rotor, whereby the stator includes U-shaped stator blades which form a cylindrical ring, and whereby the rotor has permanent magnets which are arranged at the pole ends of the stator blades and which form cylindrical or annular rotor elements. In accordance with the invention, the U-shaped stator blades of the stator form two cylindrical rings, whereby in each case one of the two rings is arranged at one side of the rotor such that the rotor is laterally surrounded by the two rings.

Abstract: An electromagnetic actuator includes a fixed core supported by a bottom wall of a housing, a movable core arranged opposite to the fixed core via an air gap to drive the movable member, and coil assembly supported by the housing to surround both the cores, wherein the movable member and the movable core are connected by connecting means for adjusting the air gap between the fixed core and the movable core, and wherein an adjustment operating hole through which the connecting means is adjusted is provided on the fixed core so as to be opened outside the bottom wall of the housing. Thus, it is possible to freely adjust the air gap between the fixed core and the movable core without preparing several types of connecting members.

Abstract: A method and apparatus for a generator coil includes a plurality of stacked windings in a rotor where individual turns are stacked in parallel sided radial slots in the rotor. Each successive turn has the same width substantially corresponding to a constant width of each slot, wherein a first turn has a first thickness and a second turn has a second thickness thicker than said first thickness. The second turn is employed in regions of high temperature thereby reducing the temperature thereof.