Abstract: A rolling device adapted to roll on a ground surface, including at least one motorized wheel including a circular stator and a circulator rotor. The stator may include a circular slot and a plurality of electromagnetic coils located in the circular slot so that at least two electromagnetic coils are arranged facing one another. The circular motor may include a circular strip having side walls and a free end edge connecting the side walls, as well as a contact surface with the ground, the circular strip including magnetic elements arranged on the side walls thereof. The circular rotor and the circulator stator may be assembled by means of assembly means provided on the circular stator.

Abstract: A driving mechanism for moving an optical element is provided, including a movable portion, a fixed portion, a driving assembly, and a first resilient element. The movable portion is for connecting the optical element. The movable portion is movable relative to the fixed portion. The driving assembly drives the movable portion to move relative to the fixed portion. The first resilient element has a board structure. The movable portion is movably connected to the fixed portion via the first resilient element. The fixed portion includes a connection surface, a restricting surface, and a recessed portion. At least a portion of the first resilient element is disposed on the connection surface. The restricting surface contacts and restricts the movable portion. The recessed portion is located between the connection surface and the restricting surface, wherein the recessed portion is lower than the connection surface and the restricting surface.

Abstract: A bearing and shaft arrangement of an automobile vehicle electric drive unit includes a gearbox. A first electric motor within the gearbox is engaged with and axially rotates a first shaft within the gearbox. A second electric motor within the gearbox is engaged with and axially rotates a second shaft within the gearbox. A first roller bearing assembly supports the first shaft to a first structural member of the gearbox. A second roller bearing assembly supports the second shaft to the first structural member of the gearbox. A thrust bearing is positioned between the first roller bearing assembly and the second roller bearing assembly and directly contacts the first shaft and the second shaft in a drive mode and reacts a first axial load of the first shaft and a second axial load of the second shaft directed toward the first axial load.

Abstract: A magnetic machine including a rotor in concentric arrangement with a stator. The rotor includes a plurality of protruding magnets arranged on a back iron and the stator includes a plurality of windings which interface with the plurality of protruding magnets. Illustrated embodiments of the rotor and stator form an in-runner machine where the stator surrounds an interior rotor or an out-runner machine where the rotor surrounds the stator.

Abstract: A coil is a coil of a conductive wire that has a quadrangular cross section, that is spirally wound and laminated to have a series of turns including first to n-th turns (n is an integer of 3 or more), and that is provided, on at least some of the first to n-th turns in the coil, with deformed portions representing recesses each having a shape different from a shape of another portion of the conductive wire. In each of the first and n-th turns respectively lying at both ends of the series of turns, an outer surface lying on a side opposite to a center of the series of turns extends flush along with a plane intersecting the series of turns.

Abstract: A power conversion device comprises: a power conversion circuit that converts a supplied electric power; a current detection circuit that detects a current; a control circuit that controls an operation of the power conversion circuit; and a multilayer substrate that is provided with the power conversion circuit, the current detection circuit, and the control circuit. The multilayer substrate includes a printed wiring, and the printed wiring includes a transmission pattern that transmits a detection signal detected by the current detection circuit to the control circuit. An on-off fluctuation unit of the power conversion circuit fluctuates. The whole of the transmission pattern is disposed at a position different from the on-off fluctuation unit in a direction perpendicular to a plate surface of the multilayer substrate.

Abstract: Provided is an electric power steering device, including: a motor; and a control device, wherein the motor includes a case having a cylindrical shape, wherein the control device includes: a housing having a cylindrical shape, wherein the case and the housing are coupled to each other in a state in which an outer peripheral end portion at one end portion of the case and an outer peripheral end portion at one end portion of the housing face each other, wherein a first sealing material is disposed between the case and the housing, wherein a connector is disposed between the case and the housing, wherein a second sealing material is disposed between the housing and the connector, and wherein a part of the first sealing material and a part of the second sealing material adhere to each other.

Abstract: A mass tuned damper for electric machines, particularly those with an external rotor and an internal stator in cantilever arrangement. The mass tuned damper includes a body with a predetermined mass and a mounting mechanism with a predetermined rigidity configured to couple the body onto a mounting surface of the stator. The mass tuned damper is configured, by varying the mass of body and/or the rigidity of the mounting mechanism, to oscillate at a first frequency equal to, but at least partially out of phase with, a resonance frequency of the stator.

Abstract: Disclosed is a rotary table device which accurately detects the position of a table rotating in relation to a bed over the entire circumference and whose assembly is facilitated by covering an armature assembly with an insulating layer for insulation between the bed and the table. In the rotary table device, a ring member having a ring scale extending over the entire circumference of the ring member is disposed around a lower part of the table having a field magnet extending over the entire circumference of the table. A sensor for reading the ring scale is disposed on the bed on which armature coils of the armature assembly are arranged in the circumferential direction to face the field magnet.

Abstract: A linear motor is provided. The linear motor according to an embodiment of the present disclosure may comprise: a primary member including a plurality of armature modules, each armature module including a magnet core including two or more protruding portions and a coil; and a secondary member including at least one magnet module. The primary member may be fixed and a movable member composed of the secondary member moves by generated thrust. And, along the moving direction, a first interval between first armature modules disposed in a first section may be different from a second interval between second armature modules disposed in a second section after the first section.

Abstract: The invention relates to an electric conductor for use in electric machines, more particularly for producing windings for stators or rotors of electric machines, such as electric motors or generators. The conductor comprises an electrically conductive conductor core having a substantially rectangular cross-section and comprises two longitudinal end faces arranged opposite one another and two transverse end faces arranged opposite one another as well as a total longitudinal extension between a first end and a second end. The conductor further comprises at least one insulation layer, which is arranged around the full circumference of the conductor core at least over a predominant part of the total longitudinal extension of the conductor core. The at least one insulation layer predominantly consists of an extrudable, polymer, thermoplastic material selected from the group of aromatic polysulfones (PAES) or mixtures of aromatic polysulfones (PAES).

Abstract: Provided is a brush arrangement of a wind turbine lightning protection system, realized to provide a current path from a hub to a canopy of the wind turbine, which brush arrangement includes a brush holder arranged to hold a brush in electrical contact with a contact surface at the exterior of the canopy, which contact surface is electrically connected to the hub; a bracket arranged to electrically connect the brush with a mounting plate; characterized by an access opening in the front wall of the canopy, which access opening is dimensioned to accommodate the bracket and brush holder; and a mounting arrangement for securing the mounting plate to the canopy front wall over the access opening, from within the canopy interior. A wind turbine including a lightning protection system with at least one such brush arrangement is also provided.

Abstract: In a drive device having a tubular linear motor with a stator (1), an armature (2) and a bottom flange (30), the stator (1) is arranged on the bottom flange (30) in thermal contact with the bottom flange (30). The stator (1) is fluid-tightly enclosed by stainless steel. The bottom flange (30) consists at least partly of a material having a higher thermal conductivity than stainless steel. The stator (1), together with the bottom flange (30), is enclosed by a casing (40) made of stainless steel which is in thermal contact with the bottom flange (30) and encloses the bottom flange (30) and the stator (1) in common. The stator (1) is a tubular stator (1) having drive coils (12) arranged therein and also having a longitudinal axis and a through-hole (11) which extends through the tubular stator (1) coaxially with the longitudinal axis.

Abstract: An internal magnetic resistance system for use with a fitness device includes an axle, inertia wheel, transmission wheel, magnetic permeable ring and electromagnet. The inertia wheel is disposed at the axle and has a protruding ring portion. The transmission wheel connects to the inertia wheel and transfers an external force to the inertia wheel to cause the inertia wheel to rotate. An outer circumferential surface of the magnetic permeable ring is fixedly disposed on an inner circumferential surface of the protruding ring portion such that the magnetic permeable ring rotates together with the inertia wheel. The electromagnet is disposed in the protruding ring portion and surrounded by the magnetic permeable ring. The electromagnet has a support fixedly disposed at the axle and iron cores disposed at the support. Each said iron core is surrounded by a coil and separated from the magnetic permeable ring by a gap.

Abstract: A main field connection to connect to a main field winding has a semi-cylindrical portion with an axially thicker outer surface, an axially thinner inner surface, with an aperture. An extending portion extends from the semi-cylindrical portion to a remote extending end. The remote extending end extends for a first axial distance. The axially thicker portion of the semi-cylindrical portion extends for a second axial distance. A ratio of the first axial distance to the second axial distance is between 0.65 and 1.4. A rotating assembly, a generator and a method are also disclosed.

Abstract: A pole shoe of an electric machine limits a winding surface of a rotor that can rotate about an axis of rotation. The pole shoe is connected to a pole web of the rotor. An outer side of the pole shoe, which faces away from the pole web in the connected state, has a first region having a substantially sinusoidal contour profile and a second region having a second contour profile. The second contour profile is different from the first contour profile and is formed in such a way that the winding surface in a circumferential direction of the rotor is lengthened with respect to a winding surface of a pole shoe having an outer side extending exclusively substantially sinusoidally.

Abstract: A rotary driving apparatus includes a motor including a rotor and a stator, a first temperature sensor that detects a stator's temperature and issues a first detection signal including stator's temperature information, a housing accommodating the motor, a cooling medium supply provided in the housing to supply a cooling medium to the motor, an open-close valve provided at a housing's lower portion to open to store the cooling medium inside the housing and close to discharge the cooling medium from the housing, and a controller that predicts a stator's temperature change on the basis of the first detection signal to close, if the stator's temperature is predicted to exceed a motor's operation guarantee temperature, while the motor is driven at an operating point within a motor's time rating region, the open-close valve before starting motor's output restriction, to thereby increase a stored cooling medium amount inside the housing.

Abstract: Apparatus, systems, and methods used to produce linear and rotational motion, acceleration, and actuation by the use of mobile ferromagnetic or permanent magnets subjected to asymmetric electromagnetic field distributions are disclosed herein. A variety of exemplary embodiments and applications are described, involving different coil and actuator geometries to include and allow for both stationary and moving magnets, electric fields, and magnetic fields.

Abstract: An electric machine includes a machine rotor circumscribed by a machine stator, and having a rotor shaft, rotor stack, and end cap which rotate about an axis. The end cap includes lobes equal in number to a number of pole pairs of the machine rotor. A position sensor assembly has a predetermined alignment with the machine rotor and stator. The sensor assembly includes a sensor rotor formed by the lobes and a sensor stator having a printed circuit board with conductive sine and cosine traces. Machine rotor rotation causes the sensor assembly to output an unmodulated sine and cosine signals to a controller, which then calculates a calibrated reference angle. A magnetic axis of an electrical phase of the machine is aligned with and bisects a peak of the sine trace. A direct axis of the machine rotor aligns with an edge of a lobe.

Abstract: A lubricant supported electric motor includes a stator presenting an stator raceway, and a rotor movable relative to the stator and presenting a rotor raceway disposed in spaced relationship with the stator raceway to define a gap therebetween. A lubricant is disposed in the gap for supporting the rotor relative to the stator. The stator defines at least one hydrostatic support chamber disposed in radially recessed relationship relative to the stator raceway and in fluid communication with the gap. The stator also defines a passageway disposed in fluid communication with the at least one hydrostatic support chamber for providing lubricant to the at least one hydrostatic support chamber and the gap. A flow restriction mechanism is disposed in fluid communication with the passageway for controlling and balancing a supply and pressure of the lubricant in the hydrostatic support chamber.