871results 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.

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.

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.

Methods and apparatus for twisting rectangular rotor and stator conductor ends whereby most if not all conductor ends are bent at once, radially adjacent ends being bent in opposite directions. A lost motion member may be used to bend selected conductors through lesser angles for such purposes as phase interconnection and power leads. The rectangular conductors are retained against twisting so that flat conductors will bend about an axis perpendicular to the larger dimension of the conductor cross section. Various features of the methods and apparatus are disclosed.

A stator winding is provided with three distributed winding phase portions each constructed by installing a conductor wire in every third slot. Slot-housed portions of the conductor wires are formed with a rectangular cross section and coil end portions are formed with a circular cross section.

A rotating electrical machine includes: a stator that includes two stator stages each constituted with a plurality of claw poles extending toward opposite sides along an axial direction at alternate positions and a ring-shaped core back that forms a magnetic path between the claw poles, the two stator stages being stacked over along the axial direction; a stator winding formed by winding a coil in a ring shape and disposed in a space enclosed by the claw poles and the core back at each of the stator stages; and a rotor rotatably disposed at a position facing the claw poles of the stator, and: stator windings corresponding to a plurality of phases are disposed together at least at one of the two stator stages.

The three degree of freedom radial-axial direction mixing magnetic bearing, and two degree of freedom bearingless permanent magnet synchronous motor are used to compose 5 degree of freedom bearingless permanent magnet synchronous motor digital-control servosystem. Three independent PID linear controllers are used to make independent control. Through adjusting control parameter of PID controllers, implements steady operation of the mixing magnetic bearing. The hall sensor is used to detect the size of magnetic field of rotator, and directional control strategy based on rotator field is adopted to make dynamic decoupling control. Through adjusting parameter of two PI controller in location control ring, ensures redial direction suspension system of bearingless motor has good dynamical and static property. Through adjusting parameters of three PI controller in rotating speed control ring, ensures the rotating speed has good response property.

Electromagnetic rotary machines, such as electrical power generators and electric motors, that have one or more active portions modularized into a set of modules. Each of the modules is secured to a support frame via a sliding-interlock system that allows that module to be slidingly engaged with the support frame. In some embodiments, each module can include an integrated coolant conduit that carries a coolant to cool the active portion during operation. The modules can each be self-contained in the respect that essentially all that needs to be done to form the active portion and corresponding portion of the cooling system is to install the modules and make any remaining electrical and coolant conduit connections.

A stator coil includes a plurality of copper strands and a layer of high thermal conductivity polymer disposed adjacent at least one of the copper strands. The high thermal conductivity polymer includes a host polymer and a high thermal conductivity filler. The high thermal conductivity polymer improves heat transfer from the plurality copper strands.

A stator includes: plural core configuration sections each including plural yoke configuration sections that configure a ring shaped yoke and are segmented in a yoke circumferential direction and plural teeth sections that project from the respective yoke configuration sections along a yoke radial direction, with the plural yoke configuration sections and the plural teeth sections integrated together; plural coil wires that are wound onto the respective teeth sections to configure plural winding portions; and plural insulators that each include plural insulator portions that are integrated to each of the respective core configuration sections and insulate between the teeth sections and the winding portions, and a connection portion that connects together the plural insulator portions.

A motor including a mounting shaft having a hollow channel and a bearing attached to each end, a cylindrical hub having a hollow core for the mounting shaft, and plural rows of plural Molded Magnetic Flux Channels with a hollow core and a channel forming a U-shaped recess and mounted the surface of the hub, each row corresponding to a motor phase. Each magnetic flux channel forms two pole pieces divided by the channel. The motor also includes plural phase windings, one passing through each row of plural Molded Magnetic Flux Channels, a rotating drum having plural rows of permanent magnets on an inner surface, each row pair corresponding to and aligned with one of the plural rows of Molded Magnetic Flux Channels. The rotating drum connected with the bearing, and drive electronics for driving the plural phase windings, wherein the plural Molded Magnetic Flux Channels increases torque and motor efficiency.

Method and apparatus for removing winding conductors from a twisting machine and placing them in a rotor or stator stack. The method comprises, for removing from a twisting fixture and inserting into a rotor or stator, a plurality of rectangular winding conductors each having a pair of legs separated by an amount equal to the distance between a predetermined number of rotor or stator slots in which they will be inserted and integrally connected at one end thereof, moving a plurality of fingers of a clamping assembly between the legs of a plurality of winding conductors in a twisting fixture to retain the winding conductors, moving the clamping assembly away from the twisting fixture to withdraw the winding conductors from the twisting fixture, providing relative movement of the clamping assembly and a rotor or stator to insert free ends of the winding conductors into a rotor or stator, and moving the fingers of a clamping assembly from between the legs of a plurality of winding conductors. A preferred embodiment of the apparatus is also disclosed.

A motor is provided that includes magnetic poles, an armature core, armature coils, a commutator, and power supply brushes. The armature core includes teeth arranged in the circumferential direction to extend in a radial pattern. The armature coils include inner layer coils and outer layer coils. Each of the inner layer coils is wound around radially proximal end portions of two circumferentially adjacent teeth or a radially proximal end portion of one of the teeth. The inner layer coils are arranged in the circumferential direction without overlapping each other in the radial direction. Each of the outer layer coils is wound around radially distal end portions of two circumferentially adjacent teeth by distributed winding. The outer layer coils are arranged radially outward of the inner layer coils and are arranged in the circumferential direction without overlapping each other in the radial direction. The circumferential center of the inner layer coils and the circumferential center of the outer layer coils are displaced in the circumferential direction.

A method for making a stator assembly includes forming several continuous conductors with generally-coplanar parallel-spaced straight segments interconnected by end loop segments, as by winding each of several conductors on a peg board, and then pressing the conductors to form either one, two, or three generally-orthogonal “jogs” in a given end loop segment. The conductors are interpositioned with their straight segments staggered and with a first leg of each subsequent conductor's end loop segments generally overlying a second leg of the immediately-prior conductor's end loop segments, except for the two end loop segments following the first conductor's “nth” straight segment, and multiples thereof, where the stacking order is reversed (“n” being equal to the number of stator core slots divided by the number of conductors that will form a given winding layer). The resulting preform is inserted into the core slots over multiple revolutions to thereby obtain a multilayer cascaded stator winding with interleaved transitions.

The present invention relates to a method and a control system for driving a three-strand brushless, electronically commutated electric motor (2), wherein a line AC voltage (U_N) is rectified and fed via a slim DC link (8) with minimum DC link reactance as a DC link voltage (U_Z) to an inverter (10) that can be driven to supply and commutate the electric motor (2). A pulsating DC voltage (U_G) initially generated by rectifying the line AC voltage (U_N) is dynamically increased with respect to its instantaneous values by a step-up chopper (18) in such a manner that the resulting DC link voltage (U_Z) with a reduced ripple always lies above a defined limit voltage (U₁₈/U₁) over time. The control system consists of a network rectifier (6), a downstream slim DC link (8) with minimum DC link reactance and a controllable inverter (10) that can be supplied via the DC link and driven to commutate the electric motor (2). A step-up chopper (18) is integrated therein with a controller (20) designed in such a manner that, the pulsating DC voltage (U_G) rectified by the network rectifier (6) is dynamically increased with respect to its instantaneous values in such a manner that the resulting DC link voltage (U_Z) with a reduced ripple always lies above a defined limit voltage (U₂₀/U₁) over time. Stray inductances (Ls1-Ls3) of the motor winding heads present in the electric motor (2) are used as inductor (L) for the step-up chopper (18).

A stator coil module facilitating the manufacture of an electric rotating machine is provided. The stator coil module is provided with a stator coil (1), a cooling pipe (2), and a mold member (3). The cooling pipe (2) is provided separately from the stator coil and is disposed along it. The mold member molds the stator coil (1) and the cooling pipe (2). A hole surrounded by the stator coil is formed in the mold member. The cooling pipe includes a coolant outlet (2b) at one end thereof and a cooling inlet at the other end thereof. The stator coil module is further provided with a coil lead wire for supplying the stator coil with electric power. The ends of the cooling pipe and the coil lead wire are disposed on the side of one end of the stator coil module.

A stator winding structure of a motor or a generator includes plural separate different-shaped rod conductors combined to form a collective winding structure to take the place of a conventional winding structure which has a coil wire wound continuously. The different-shaped rod conductors can be designed in shape to match with the sizes of the coil slots to increase a slot occupied rate of the conductors and to prevent the conductors from bent during the coil winding process. The stator winding structure is especially applicable to a motor or a generator with large power and difficult in multi-electrode winding, facilitating winding and enhancing a slot occupied rate of the conductors and also reducing copper loss during output of large current.

A wheel assembly includes a carrier and a wheel mounted adjacent to the carrier for rotation relative to the carrier. A first array of magnets is carried by one of the first side of the wheel and the carrier, and a first array of coils is carried by the other of the wheel and the carrier corresponding to the first array of magnets. A spinner is mounted adjacent to the wheel for rotation relative to the wheel. A second array of magnets is carried by one of the wheel and the carrier, and a second array of coils is carried by the other of the wheel and the spinner corresponding to the second array of magnets.

This disclosure relates in general to a new and improved electric motor/generator, and in particular to an improved system and method for producing rotary motion from a electro-magnetic motor or generating electrical power from a rotary motion input by concentrating magnetic forces due to electromagnetism or geometric configurations.

A direct current (DC) electric motor assembly with a closed type overlap stator winding which is commutated with a timed commutating sequence that is capable of generating a stator rotating magnetic field. The coil overlap of the winding and a timed commutation sequence are such that the current in each slot of the stator is additive and when a previous magnetic pole collapses according to a commutation sequence; the energy released by that previous collapsing magnetic field is captured to strengthen the next magnetic field on the commutation sequence schedule. Electrical currents produced by the collapsing magnetic fields flow to low electric potential and add or subtract to the DC current provided by the commutator thus promoting formation of the next magnetic on commutation schedule. When used with a suitable commutator and rotor, the electric motor assembly provides a true brushless high torque speed controlled Real Direct Current (RDC) motor that operates with higher efficiency and higher power density.

An electrical rotating machine wherein the coil end portion and slot straight portion of a coil conductor are coated with insulation layers respectively. The insulation layers are different in thickness or insulation material, and an electric field lessening layer is coated on the coil conductor or the insulation layers.

The segment connection type electric rotating machine includes a stator coil constituted by phase coils each of which includes a U-shaped segment continuum formed by U-shaped conductor segments inserted into slots of a stator core, an I-shaped leading conductor segment inserted into one of the slots and connected to a lead end of the U-shaped segment continuum, and an I-shaped terminating conductor segment inserted into one of the slots and connected to a terminal end of the U-shaped segment continuum. A connector box fixed to the outer periphery of the stator core. A power supply lead is laid between the connector box and the I-shaped leading conductor segment. The power supply lead is welded at a tip portion thereof to an end portion of the I-shaped leading conductor segment in the vicinity of head-side coil ends of the stator coil.

The armature of a motor comprises a core constituted by assembling a plurality of split core members. Each split core member has at least two teeth. The method for manufacturing the armature comprises the steps of: winding a conductive wire on each tooth of each split core member to form a first coil on the teeth; spanning the conductive wire extending from a winding finishing end of the first coil from each tooth to the other tooth; winding the conductive wire on the tooth to which the conductive wire is spanned to form a second coil on the first coil; joining a winding starting end of the first coil and a winding finishing end of the second coil in each tooth to form a single coil; and mutually assembling the plurality of split core members each comprising the coils. As a result, productivity is improved, while reducing size.

In a multiple phase claw pole type motor which includes: a plurality of claw poles including a claw portion extending in an axial direction and having a magnetic pole surface facing a rotor in a state of being separated from the rotor by a small gap, a radial yoke portion extending radially outwardly from this claw portion, and an outer peripheral yoke extending from this radial yoke portion in the same direction as the direction of extension of the claw portion; a stator core formed by alternately placing the claw poles in a circumferential direction so that a distal end of each claw portion faces the outer peripheral yoke of an adjacent one of the claw poles; and a stator constructed by sandwiching an annular coil with the adjacent claw poles of this stator core, a multiple phase claw pole type motor characterized in that the claw poles are formed by compacting a magnetic powder and are formed of a magnetic compact having a DC magnetizing property of its flux density becoming 1.7 teslas or more when 10000 A/m of magnetic field is applied.