1902results about "Synchronous machines" patented technology

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.

A wind energy conversion system includes upper and lower wind turbines having counter-rotating blade assemblies supported for rotation about a vertical rotation axis, with each blade assembly carrying a rotor for rotation past a stator to produce an electrical output. The wind turbines are supported by a tower at an elevated position above the ground. Each wind turbine produces torque, and the wind energy conversion system provides for balancing the torques to avoid a net torque on the tower. Adjustment mechanisms are provided for adjusting blade pitch and for adjusting the size of an air gap between a stator and a rotor that comes into alignment with the stator as the rotor rotates therepast. The wind energy conversion system provides a hood for supplying intake air to a wind turbine and an exhaust plenum for exhausting air from the wind turbine, with the hood and the exhaust plenum being directionally positionable.

An alternator stator having cascaded end loop segments includes a multi-phase stator winding that is adapted to be placed in a plurality of circumferentially spaced axially-extending core slots in a surface of a stator core. The stator winding includes a plurality of straight segments alternately connected at the first and second ends of the stator core by a plurality of end loop segments to form the winding. The end loop segments include first and second sloped portions meeting at an apex portion. Each of the end loop segments includes a radial outward adjustment and a radial inward adjustment and forms a cascaded winding pattern.

A powdered magnetic material stator core with embedded stator windings and a method for its manufacture. Embedding the windings within a radially compacted powdered magnetic material stator core enables equivalent or better electromagnetic performance in a significantly reduced size. Radial compaction of the powdered magnetic material minimizes the distortion of the stator windings during compaction.

The present invention is directed to a downhole apparatus for quickly generating and regulating variable output electric power by varying the alignment of a pair of axially adjacent permanent magnets rotating within an armature having electrically conductive windings. Each of the permanent magnets comprises a plurality of permanent magnetic segments having circumferentially alternating magnetizations. One of the permanent magnets is fixed to the drive shaft, and the other permanent magnet is movably mounted on the drive shaft to enable the alignment or misalignment, as desired, of the magnetizations of the respective magnetic segments on the pair of permanent magnets. When the magnetizations are completely aligned, the maximum electrical power is generated in the windings of the main armature; conversely, when the magnetizations are completely misaligned, zero electrical power is generated. Thus, the output power is regulated by varying the alignment of the pair of permanent magnets, which is accomplished with a drag torque generator which creates a drag torque that is transmitted to the movable permanent magnet by a torque converter.

A stator of a motor includes a plurality of busbar plates, each laminated above a stator core in an axial direction and connected to a plurality of wires having a substantially U-shaped configuration. Each busbar plate includes a plurality of busbars arranged in a circumferential direction, and a busbar holder of insulating quality to which the plurality of busbars are integrally affixed. The wires include a line portion, and a connecting end portion having a substantially columnar shape protruding from an end surface of the line portion. The busbar makes contact with the end surface of the line portion and is connected by welding to the connecting end portion.

The invention discloses a transmission shaft permanent magnet coupling drive and speed regulation device capable of adjusting magnetic torque, which has a turntable type, barrel type or turntable and barrel combined structure. The device consists of at least one set of axial magnetic field permanent magnet coupling component or/and radial magnetic field permanent magnet coupling component, at least one pair of diving permanent magnet coupling turntable coupling shaft mechanisms which are fit with a driving turntable in the permanent magnet coupling component, a corresponding driving shaft coupling, at least one pair of driven permanent magnet coupling turntable coupling shaft mechanisms which are fit with a driven permanent magnet coupling turntable in the permanent magnet coupling component, a corresponding driven shaft coupling, a pair of permanent magnet coupling turntable air gap and coupling area adjusting mechanisms and a pair of integrated assembling mechanisms which ensures that the system is an integrated structure and is convenient to package, transport and install. The device is applicable in the technical field of transmission shaft coupling drive, the technical field of load speed regulation and the field of power dragging.

In an AC rotating machine, a stator is provided with N-phase stator windings and located relative to the rotor. The N is an integer equal to or greater than 3, and the N-phase stator windings are arranged to be electrically isolated from each other. An inverter circuit is provided with first to N-th full-bridge inverters. Each of the first to N-th full-bridge inverters includes a first pair of series-connected switching elements and a second pair of series-connected switching elements. The first pair of series-connected switching elements and the second pair of series-connected switching elements are connected in parallel to each other. Each of the first to N-th full-bridge inverters is configured to individually apply a single-phase AC voltage to a corresponding one of the N-phase stator windings to thereby create a torque that rotates the rotor.

An object of the present invention is to provide a linear actuator in which reliability is improved, and performance is also easily improved. The present invention provides a linear actuator including a stator, a movable element having an iron member, and being reciprocatable with respect to the stator, a permanent magnet fixed to the stator so as to be opposed to the iron member, and a coil fixed to the stator. Because both the coil and the permanent magnet are fixed to the stator, electrical current does not have to be supplied to the movable element, and the feeder lines connected to the coil will not be broken due to the movement of the movable element. In addition, the weight of the movable element will not be increased even when the weigh of the permanent magnet is increased in order to obtain high magnetic flux density for improvement in performance. Moreover, because the movable element does not include a magnet, a magnetizing operation does not have to be applied to the movable element. The permanent magnets may be a pair in which the directions the magnetic poles thereof differ from each other, and two pairs of permanent magnets may be provided. The number of magnetic fluxes that run through the magnetic pole elements and the iron member can be increased by providing a magnetic reluctance section around the permanent magnets.

A stator for an electric machine includes a generally cylindrically-shaped stator core having a plurality of circumferentially-spaced and axially-extending core teeth that define a plurality of circumferentially-spaced and axially-extending core slots extending between first and second ends of the stator core. Within the core is a stator winding having a plurality of phases, each of the phases including a pair of conductors connected in parallel and having a plurality of slot segments housed in the core slots. The slot segments are alternately connected at the first and second ends of the stator core by a plurality of end loop segments. The conductors within each pair of each phase are connected in parallel and are in phase with one another such that the stator core has two slots per phase per pole.

Method and apparatus for forming motor winding conductors rectangular conductor wire. The method comprises populating with hairpin shaped conductors, most of a forming fixture having a plurality of pockets distributed in equal number in one or more pairs of adjacent circles, each concentric with a center of the forming fixture, at least one member defining each of the pockets in one of each pair of adjacent circles being rotatable, at least through a limited angle, with respect to a member defining the pockets in the other of the respective pair of adjacent circles, the hairpin conductors each having first and second legs integrally joined by a loop at one end thereof, with one leg of each hairpin conductor in a respective one of the pockets in a pair of adjacent circles, and rotating in a first direction, relative to each other, the members defining the pockets in each pair of circles through a predetermined angle, to permanently separate the two legs of each hairpin conductor without substantial rotation of each leg of the hairpin conductors relative to its respective pocket. Various additional features are disclosed.

A stator core with a plurality of slots circumferentially arranged therearound has a stator winding including three (UVW) phase windings, each phase winding having 4n parallel windings. The stator winding is formed of U-shaped conductor segments inserted in the slots from one axial end, a pair of open end portions of each conductor segment extending axially from of the stator core and being bent toward circumferentially opposite directions, the bent portions being star connected together. The plurality of slots have, for each phase winding, pairs of circumferentially adjacent slots, each slot having an even number of slot-received portions of the phase winding radially aligned in a column, and for each circumferential slot pairs, the slot-received portion in an m-th layer of each slot of the pair is electrically connected to the portion inserted in an (m+1)-th layer of a slot of a circumferentially adjacent slot.