16082results about "Supports/enclosures/casings" patented technology

An actuation device employing square-loop latchable magnetic material having a magnetization direction (polarization) capable of being changed in response to exposure to an external magnetic field is disclosed. The magnetic field is created by a conductor assembly with non-solenoid configuration. Once the magnetization direction of the material is so changed, the external magnetic field is no longer required to maintain the new magnetization direction. The latchable magnetic material is disposed on the mobile electrode of a switching device, and another magnetic material is disposed in spaced relation to the latchable magnetic material on a stationary electrode or surface. By applying an electrical current to a conductor assembly arranged proximate the latchable material, a magnetic field is created about the latchable magnetic material, to change the magnetization direction and thereby enable the attraction or repulsion of another magnetic material located on the stationary electrode. The resulting relative displacement of the mobile and stationary electrodes effects the selective connection or disconnection of electrical contacts carried on or associated with the respective electrodes of the actuation device without requiring additional power in order to maintain the switched state of the electrodes.

PCT No. PCT/JP96/02929 Sec. 371 Date Jun. 25, 1998 Sec. 102(e) Date Jun. 25, 1998 PCT Filed Oct. 9, 1996 PCT Pub. No. WO97/26700 PCT Pub. Date Jul. 24, 1997A motor mounted in a vehicle having a winding comprising a flat band-like copper wire is provided. The winding is wound on a projection that extends radially inward of a stator. The winding includes a first band-like section that is adapted to be wound on a radially inward portion of the projection of the stator. The winding also includes a connection section that is continuous with one longitudinal end of the first band-like section and extends radially outward along the radial direction of the projection of the stator. The winding further includes a second band-like section that is adapted to be wound on a radially outward portion of the projection of the stator. One longitudinal end of the second band-like section is continuous with the connection section. The first band-like section extends from a radially inward portion of the connection section and the second band-like section extends from a radially outward portion of the connection section. The first and second band-like sections extend from the connection section in opposite directions.

An electric power steering apparatus can improve heat dissipation of a power board. A heat sink is mounted on the power board in surface contact therewith, on which power board there is mounted a bridge circuit including a plurality of semiconductor switching elements for switching an electric current supplied to an electric motor in accordance with torque assisting a steering wheel. The heat sink has a plurality of protrusions formed on a surface thereof at a side opposite to the power board.

An integrated drive system assembly is provided that combines an electric motor, a power inverter assembly and a gearbox into a single, multi-piece enclosure. Combining these components into a single enclosure reduces weight, reduces drive system complexity, reduces system volume, simplifies assembly integration into an electric vehicle, reduces manufacturing cost, allows the flexible and lengthy electrical cables between the power inverter and the electric motor to be replaced with short, low loss, rigid bus bars, and simplifies component cooling by allowing the use of a common thermal management system. The common thermal management system includes a liquid coolant loop that is thermally coupled to the electric motor, the power inverter assembly and the gearbox.

An improved system for monitoring vibration of an electric machine is disclosed. According to one embodiment, sensors are positioned in a plane orthogonal to the motor shaft and each sensor detects vibration along at least one axis of the motor. The sensors are oriented such that the polarity of each sensor is reversed. The pairs of sensors may be used to isolate specific vibrations within the motor. According to another embodiment, a sensor may be mounted directly to the motor shaft. The sensor on the motor shaft directly detects vibrations along the motor shaft. Optionally, a second sensor may be mounted to a fixed location within the motor housing, and the combination of the sensor on the motor shaft and the sensor at a fixed location may be used to isolate specific vibrations within the motor. A motor controller may adjust operation of the motor to reduce the isolated vibration.

An equipment fan has a housing (22) that externally defines an air passage opening (41) provided in the fan (20). The fan has a motor (21) for rotatably driving blades (40) about a rotation axis (23), as well as a carrier element (51), provided between the motor (21) and the housing (22), which extends transversely to the passage (41) and is configured as a trough (53) that serves to receive an electrical lead (52) and guides the lead along a predetermined path from the motor (21) to a location (64) on the housing (22). The fan also has a deflection device (50) which, by deflecting the lead (52) at a first deflection location (55) and at a second deflection location (84) and in at least two planes extending at a predetermined angle with respect to one another, effects strain relief for the lead (52) that proceeds to the motor (21).

An AC generator for a vehicle including a rotor with a fan, a stator disposed around the outer periphery of the rotor, and a frame. The stator includes a laminated core having a plurality of slots, a plurality of electric conductors in the slots, and an insulator. There is a gap between the electric conductors and the insulator in a diametrical section of the slots, and an area ratio of the gap with respect to the sectional area of the slots is not more than 25%. A portion of the electric conductor positioned within the slot has a substantially rectangular shape along the shape of the slot.

Machines useful for wind turbine and ship propulsion purposes include a wind turbine generator or a ship propulsion motor with two concentric air gaps. In one embodiment, the machine includes a rotor with an inner rotor core and an outer rotor core; and a double-sided stator with an inner stator side and an outer stator side. The double-sided stator is concentrically disposed between the inner rotor core and the outer rotor core.

A high speed centrifugal compressor for compressing fluids includes a permanent magnet synchronous motor (PMSM) having a hollow shaft, the being supported on its ends by ball bearing comprising supports. A permanent magnet core is embedded inside the shaft. A stator with a winding is located radially outward of the shaft. The PMSM includes a rotor including at least one impeller secured to the shaft or integrated with the shaft as a single piece. The rotor is a high rigidity rotor providing a bending mode speed of at least 100,000 RPM which advantageously permits implementation of relatively low-cost ball bearing comprising supports.

A disk drive is disclosed comprising a disk, a head actuated over a surface of the disk, and a spindle motor for rotating the disk. The spindle motor comprises a ring-shaped stator having a plurality of stator teeth each wound with a winding. The spindle motor further comprises a hub having a plurality of magnets for interacting with the stator teeth to rotate the hub about the shaft when the windings are energized. A ring-shaped shield is disposed in a vertical gap between the windings and the hub to reduce a voltage coupled from the windings to the surface of the disk.

An electric machine for a power system is disclosed. The electric machine has a housing with a first end cap and a second end cap. The first end cap has a first fluid passageway, and the second end cap has a second fluid passageway. The electric machine also has a stator fixedly disposed within the housing, and a rotor rotationally disposed radially inward from the stator. The rotor has an axial passageway fluidly communicating the first fluid passageway with the second fluid passageway.

An AC generator for vehicles includes a field rotor, a stator disposed around said field rotor and a frame for supporting the rotor and the stator. The stator has a laminated core having a plurality of slots, aluminum conductors housed in the slots, and an electric insulator. The aluminum conductor is constituted by in-slot portion and a crossover portion for connecting an in-slot portion in one slot to another in-slot portion in a different slot to provide a winding as a whole. The frame is provided with a plurality of windows substantially in a whole periphery thereof at portions encircling the crossover portions and substantially in an outer diametrical direction opposite to the crossover portions.

This invention provides a small, high efficiency, oil-free turbine-driven alternator (i.e. turboalternator) suitable for conversion of stored energy in a process gas to electrical power, facilitating recapture of energy during operation that would otherwise be wasted. The turboalternator includes a turbine and a generating device operatively connected together by a rotating shaft capable of rotating at high speeds. The rotating shaft is supported by foil gas bearings.

A plurality of coils wound around a stator magnetic-pole core are connected together and connected to output wires by use of a bus bar. The bus bar having a generally cylindrical body portion is disposed at one axial end of the stator magnetic-pole core, around which the coils are wound such that clearances are formed within magnetic-pole core slots, with an axial clearance formed between the bus bar and the coils. The body portion has such a radial dimension that at least a portion of the clearances within the magnetic-pole core slots is left uncovered. Air holes are formed in the motor housing on opposite sides of the stator magnetic-pole core to thereby form cooling air passages extending through the magnetic-pole core slots.

The present invention provides a novel dual-rotor, radial-flux, toroidally-wound, permanent-magnet machine. The present invention improves electrical machine torque density and efficiency. At least one concentric surface-mounted permanent magnet dual-rotor is located inside and outside of a torus-shaped stator with back-to-back windings, respectively. The machine substantially improves machine efficiency by reducing the end windings and boosts the torque density by at least doubling the air gap and optimizing the machine aspect ratio.

An array of magnetically actuated MEMS mirror devices is provided having stationary magnets configured to provide strong magnetic fields in the plane of the mirrors without any magnets or magnet-system components in the plane of the mirrors. Also, a magnetically actuated mirror device is provided that includes an improved actuation coil configuration that provides greater torque during mirror actuation. In addition, a mechanism is provided to detect the angular deflection of a moveable mirror. Also, an improved process is provided for manufacturing MEMS mirror devices.

A blower assembly comprises a blower housing having a stator assembly integrally formed therewith. The stator assembly includes a stator bore having a rotor magnet rotatable therewithin such that the motor assembly is configured as a brushless D.C. motor. An impeller is mounted on a motor shaft of the motor assembly and has a plurality of vanes extending upwardly therefrom. Each one of the vanes has a vane height which is optimized to minimize the formation of fluid eddy losses during compression of air by the impeller. A bearing assembly rotatably coupling the rotor magnet to the stator assembly is sized and configured to maintain an air gap of approximately 0.0002 inches between the vanes and a housing interior surface of the blower housing during rotation of the impeller.

An electric power tool includes a housing, a brushless motor, an output shaft, and a motor driver circuit. The housing defines an axial direction. The brushless motor is accommodated in the housing and having a drive shaft. The output shaft extends in a direction generally perpendicular to the drive shaft. The motor driver circuit is accommodated in the housing for driving the brushless motor. The housing has a cylindrical shape and has a part functioning as a grip portion.

A wind turbine generator includes a stator having a core and a plurality of stator windings circumferentially spaced about a generator longitudinal axis. A rotor is rotatable about the generator longitudinal axis, and the rotor includes a plurality of magnetic elements coupled to the rotor and cooperating with the stator windings. The magnetic elements are configured to generate a magnetic field and the stator windings are configured to interact with the magnetic field to generate a voltage in the stator windings. A heat pipe assembly thermally engaging one of the stator and the rotor to dissipate heat generated in the stator or rotor.

A compact fan motor including a motor body having a tubular case accommodating a rotor, a permanent magnet, and brushes, and a pair of spring terminals that are connected to the brushes, sticks out from a peripheral wall of the tubular case, and has elasticity in a direction perpendicular to an axis of rotation of a shaft; an impeller fixed to the shaft sticking out from a front end of the tubular case; a holder having a case accommodating portion that is provided in a housing accommodating the motor body and impeller and has an inner wall surface extending in the direction of the axis of rotation of the shaft, and a motor body insertion opening provided at an edge of the case accommodating portion; and a pair of conductors provided on the inner wall surface of the holder while contacting with the spring terminals.

A brush holder equipped as a component on a printed circuit board and is inserted into a recess provided in a transmission housing of the drive device and thereby can be slid in the radial direction over a commutator of an already completely assembled armature. The drive device according to the invention is provided for moving a sliding sunroof of a vehicle.

For achieving small-sizing and high efficiency by improving heat radiation of coils, and further for simple-construction to be easily disassembled, thereby being environment-friendly from a view point of recycling, an electric rotating machine comprising: a stator 1a being constructed by inserting coils 10a into slots 11 of a stator core 2a; an outer frame 4 being divided into a plurality thereof, so as to cover periphery of the stator core of said stator; a pair of bearing holder portions 6a and 6b, each having a fitting portion 35a or 35b to be fitted into an inner diameter reference surface 25a at both end portions of said stator and being provided with a bearing 8a or 8b at an axial center portion thereof, and being attached at both sides of said stator core so as to cover coil end portions dropping out at both sides of said stator; a squeezing mechanism (30, 32a, 32b, 6a, 6b) fixing the outer frame at an outer periphery of the stator core, by a wedge function between each of the bearing holder portions and the outer frame due to a squeezing function of attaching the each of said pair of bearing holder portions at both sides of said stator core; and a rotor 3 being formed with an escaping portion for escaping from an outer diameter of a portion opposing to a fitting portion of each of said bearing holder portion, rotatably positioned within said stator core.

A grounding brush for mitigating static electric charge on a motor shaft includes a plurality of filaments secured to an annular frame around the shaft, with tips of the filaments disposed in a channel defined by the frame. Conductive powder can be provided in the channel to improve current flow from the shaft to the filaments.

A heating and cooling system for a wind turbine is provided and includes a gearbox, gearbox heat exchanger, generator, generator heat exchanger, and a cooling duct. The cooling duct is connected to the gearbox and generator heat exchangers, and is used to transport air across both heat exchangers to cool the gearbox and generator.

A dynamoelectric machine having a cooling system for removing heat uniformly about the machine. The machine includes a cooling jacket defining a flow path for liquid coolant which extends circumferentially of the machine and which reduces loss of coolant pressure. An endshield of the machine is configured for holding electronic components in arrangement integrated with the machine. The endshield has a flow passage for receiving the coolant to remove heat from the electronic components. The flow passage of the endshield and the flow path of the cooling jacket are serially arranged so that the coolant removes heat sequentially from the electronic components and a stator of the machine.

A flat pack blower utilizes surface mounting techniques for mounting the blower electronics on a thin laminated circuit board to reduce the blower profile. To that end, the blower includes a stator, and a rotor rotatably coupled to the stator. The stator includes a coil, a pole coupled with the coil, and a laminated circuit board having blower control circuitry and pads for electrically connecting the blower control circuitry to the coil. Use of surface mounting techniques on the laminated circuit board thus eliminates the discrete electronic components and the wires connecting such components.

A cooling system for an electric motor includes a cooling duct formed between a cooling jacket and a separate component surface. The separate component surface may define at least a portion of a wall of the cooling duct. The cooling duct may be configured to direct a cooling liquid along at least a portion of the separate component surface and draw heat from the electric motor. An inlet port may be in fluid communication with the cooling duct. The inlet port may be configured to receive the cooling liquid and to introduce the cooling liquid to the cooling duct. An outlet port may be in fluid communication with the cooling duct.

The present invention provides an axial rotary energy device which is arranged in a multi-phase electric current configuration. The device includes a rotor having a plurality of permanent magnet poles secured thereto and further includes a stator formed by stacking a plurality of printed circuit board working conductor layers together with a plurality of printed circuit board connecting layers. The stator having at least one working conductor layer for each phase of the electric current and at least one connecting conductor layer associated with one working conducting layer. The working conductor layer and the connecting conductor layer each having radial conductors extending from an inner diameter through-hole to an outer diameter through-hole. A plurality of via conductors are provided for electrically connecting selected ones of the radial connectors of the connecting conductor layer to selected ones of the radial connectors of the working conductor layers through the through-holes.

A method and apparatus for a portable renewable energy generator includes; a movable platform adapted for one of towing and transport to a remote area, a redundant renewable energy source generator including a wind energy extraction device configured for transport on the movable platform, and a battery system operably connected to the redundant renewable energy source generator. The battery system is configured to store electrical energy generated by the redundant renewable energy source generator.

An arrangement with an electric motor facilitates mounting of the motor, particularly of a miniature or subminiature motor. The motor (20) has a stator (56), a rotor (24), and a support flange (36) coupled to the motor. A motor mount (22) is formed with an opening (94) for engagement with the support flange (36). The opening has, on its rim, a motor-side shoulder (96) that has a substantially frustoconical shape and faces axially toward the motor (20) after mounting. The support flange (36) is shaped for guidance of a snap-lock element (82) that extends along at least a portion of the circumference of the support flange (36) and is resiliently deflectable radially inward, by means of an inwardly directed force. The snap-lock element (82) is so configured that it snap-locks outward against the motor-side shoulder (96) of the opening (94) when the motor is mounted.