Abstract: There is provided an armature including a shaft; a core attached to the shaft; a commutator that is attached to the shaft, and includes a plurality of commutator segments; windings that are wound onto the core, and are connected to the respective commutator segments; and a short-circuit member that connects together a pair out of the plurality of commutator segments, and is disposed further to the commutator radial direction outside than an outer peripheral portion of the commutator.

Abstract: A commutator includes an insulating section that is formed in a tube shape including a shaft insertion hole through which a shaft is inserted, and that is formed with an indented portion in an end portion at one side in an axial direction of the shaft. The commutator also includes plural segments that are supported by an outer peripheral portion of the insulating section, that are arrayed around a circumferential direction of the insulating section with spacings therebetween, and that are each provided with an anchor portion at an end portion at the one side in the axial direction of the shaft. The commutator also includes a first, second, third short-circuit wires, each connecting the anchor portion of respective one segment to the anchor portion of respective another segment, and at least a portion being disposed inside the indented portion formed at the insulating section.

Abstract: An electric motor apparatus that includes a disk with an increased mechanical advantage to the attached axle, with donut-shaped permanent magnets, windings, a fulcrum (A.K.A. axle), bearings, a commutator, and a single bearing conductor that replaces the brushes. The center axis consists of the windings and spools with the axis of the windings placed coradial in orbit around the fulcrum of a disk. The donut-shaped permanent magnets are cut with a slot to allow passage of the disk, spools, and windings. When windings of magnet wire are inserted with windings around the spools such that the center points of the faces of the spools are concentric to the same radius of the disk and pass through the center of a donut-shaped permanent magnet, and the windings are electrified with the correct polarity, the windings are repulsed magnetically in the direction of rotation of the orbit around the fulcrum (A.K.A. axle) causing the disk and axle to rotate.

Abstract: Provided are a rotor core, a method for cooling a rotor core, and a superconducting rotating machine, capable of effectively and uniformly cooling superconducting coils without causing cold brittleness in an extremely low temperature. The rotor core 10, which is made of a substantially hollow cylindrical member of nonmagnetic material, has a cylindrical cavity 13 defined therein and extending in the longitudinal axis of the member. Helium gas 300 is delivered in the rotor core 10 from the proximal to distal sides and vice versa, which ensures a uniform cooling of the rotor core 10. This also ensures a uniform and effective cooling of the superconducting coils.

Abstract: An electric motor includes a stator, a rotor, and multiple brushes. The stator forms multiple poles. The number of brushes is less than the number of stator poles. The rotor includes a commutator, windings, and equalizing units. The commutator includes segments electrically connected with the windings. Each of the equalizing units is electrically connected with multiple equipotential segments to make the equipotential segments have the same potential. Multiple parallel circuits are formed between the equipotential segments by the equalizing unit. The brushes are arranged to slidably contact the segments of the commutator.

Abstract: A rotating electrical machine having a shaft, an iron core having slots, an armature winding inserted into the slots, a commutator provided to the shaft and having a plurality of commutator segments that should have same potential. An equalizer connected at one end to a commutator segment among the commutator segments where the commutator segment is in contact with a brush reaches a rear side of the iron core by passing through a slot positioned at a center of a magnetic pole of the rotating electrical machine and returns to the front side by passing through another slot positioned at a center of another magnetic pole so that the equalizer is connected at the other end to a commutator segment where the commutator segment is in contact with a brush of a same polarity as the firstly-mentioned brush.

Abstract: A multipolar motor is simply wire-wound and an output thereof is capable of being switched. The motor includes at least 8 magnetic poles, an armature including at least 10 tooth sections; a commutator including at least 20 commutator segments, and brush-sets including 2 positive electrode brushes and 2 negative electrode brushes. A hook-holding section arranged to hook-hold conductor wires is installed on each of the commutator segments. Further, a group of coils is defined by using a single conductor wire that is wound onto each of the plurality of tooth sections and hooked onto the plurality of hook holding sections. This motor can switch the state in which the brush-set is energized.

Abstract: A winding for an n-phase electric motor is disclosed. The inventive winding comprises a number of consecutive winding groups of n individual windings, wherein at any point in time an individual winding of a first group exhibits one direction of current flow and wherein at the same point in time a corresponding individual winding of an adjacent group exhibits the opposite direction of current flow. There is also disclosed a method for preparing such winding. It is further disclosed a magnetic unit adapted for such winding, comprising permanent magnets being essentially triangular in cross-section. Further, there is disclosed electric motors using the inventive winding concept, as well as geodetic instruments taking advantage thereof. An electric motor according to the disclosed inventive concept is particularly well suited for direct drive.

Abstract: A segmented annular stator for a dynamo-electric machine is disclosed which simplifies transport and assembly of the machine. The segment has a cross section essentially shaped as a circular arc and includes a first and a second segment boundary configured for attachment to an additional segment, a corresponding coil associated with each phase of a three-phase system, a first conductor, and a second conductor. The first conductor is connected to the second conductor via an end connection in an area of end windings, such that a first coil associated with a first phase surrounds second and third coils associated with second and third phases of the three-phase system.

Abstract: An electric motor includes a stator, a rotor, and multiple brushes. The stator forms multiple poles. The number of brushes is less than the number of stator poles. The rotor includes a commutator, windings, and equalizing units. The commutator includes segments electrically connected with the windings. Each of the equalizing units is electrically connected with multiple equipotential segments to make the equipotential segments have the same potential. Multiple parallel circuits are formed between the equipotential segments by the equalizing unit. The brushes are arranged to slidably contact the segments of the commutator.

Abstract: A rotating electrical machine having a shaft, an iron core having slots, an armature winding inserted into the slots, a commutator provided to the shaft and having a plurality of commutator segments that should have same potential. An equalizer connected at one end to a commutator segment among the commutator segments where the commutator segment is in contact with a brush reaches a rear side of the iron core by passing through a slot positioned at a center of a magnetic pole of the rotating electrical machine and returns to the front side by passing through another slot positioned at a center of another magnetic pole so that the equalizer is connected at the other end to a commutator segment where the commutator segment is in contact with a brush of a same polarity as the firstly-mentioned brush.

Abstract: A motor for a compressor includes a rotor and a stator disposed radial outside of the rotor. The stator includes a stator core having oppositely facing axial end faces, insulators disposed so as to face the end faces, and coils wound on the stator core and the insulators. Each of the insulators has an annular part, a plurality of teeth protruding radially inwardly from an inner circumferential surface of the annular part at specified circumferential intervals, an outer circumferential wall having one end fixed to an end face of the annular part, and protrusions disposed on an outer circumferential surface of an outer circumferential wall of an insulator. At least one lead wire of the coils is drawn out to an outer circumferential side of the outer circumferential wall, guided along the outer circumferential wall, and passed on a side of the protrusions facing the stator core.

Abstract: A DC motor, has a stator housing accommodating a permanent magnet stator; a rotor, rotatably mounted confronting the stator, the rotor having a shaft, a rotor core fitted to the shaft and having laminations forming salient poles, a commutator fitted to the shaft adjacent one end of the rotor core, windings wound about poles of the rotor core and terminated on the commutator, the windings each being wound around a single pole of the rotor; and brush gear comprising brushes in sliding contact with the commutator for transferring electrical power to the windings.

Abstract: A DC motor, has a stator housing accommodating a permanent magnet stator; a rotor, rotatably mounted confronting the stator, the rotor having a shaft, a rotor core fitted to the shaft and having laminations forming salient poles, a commutator fitted to the shaft adjacent one end of the rotor core, windings wound about poles of the rotor core and terminated on the commutator, the windings each being wound around a single pole of the rotor; and brush gear comprising brushes in sliding contact with the commutator for transferring electrical power to the windings.

Abstract: A short-circuit member assembly for short-circuiting a plurality of segments arranged in a circumferential direction is disclosed. The short-circuit member assembly includes first and second short-circuit member groups that are superimposed with each other. The first short-circuit member group includes m first terminals, which are superimposed and joined with m first terminals included in the second short-circuit member group to form m first-terminal joint portions. The m first-terminal joint portions and the remaining first terminals in the short-circuit member groups are arranged in the circumferential direction and connected to the segments. All of the second terminals in the first short-circuit member group are superimposed and joined with all of the second terminals included in the second short-circuit member group.

Abstract: An AC motor having loop windings is provided, which is able to reduce unbalance of three-phase impedance to enhance the motor efficiency. Three loop windings of the three phases are interlinked with magnetic fluxes ?u, ?v and ?w of the respective phases to provide magnetic paths of the three phases. The magnetic paths of the three phases are connected to the respective stator poles of the three phases to configure the motor. The magnetic path of each of the three phases is formed by processing an electromagnetic steel plate using bending to provide a motor configuration having multiple stator poles. Magnetic fluxes of two or more stator poles of the same phase are collected to a single magnetic path to form a three-dimensional three-phase magnetic path without allowing close contact with a magnetic path of a different phase.

Abstract: In a direct current electric motor, segment pieces of a commutator are generally planar and are arranged one after another in a circumferential direction about a rotational axis of the commutator. A slidably engaging surface of each segment piece, which is slidably engageable with a plurality of brushes of the motor, extends in a plane that is generally perpendicular to the rotational axis, and each segment piece includes a radially inner engaging portion at a radially inner end part of the segment piece. Each conductive line extends along a corresponding straight line and electrically interconnects between the radially inner engaging portions of corresponding two of the plurality of segment pieces to implement the same electric potential in the corresponding two of the plurality of segment pieces.

Abstract: The invention provides means of limiting maximum current conducted through windings of an electric machine having a rotor and a stator. By encouraging an appropriate leakage flux around a winding, a leak impedance can be achieved which may be used, according to the invention, to limit the maximum current in the winding as a matter of machine design.

Abstract: The invention provides means of limiting maximum current conducted through windings of an electric machine having a rotor and a stator. By encouraging an appropriate leakage flux around a winding, a leak impedance can be achieved which may be used, according to the invention, to limit the maximum current in the winding as a matter of machine design.

Abstract: A commutator including a commutator main body having a plurality of commutator pieces and a short-circuit member having a short-circuit conductor for short-circuiting commutator pieces. The short-circuit conductor includes superimposed first and second short-circuit member formation groups. The first short-circuit member formation group is thinner than the second short-circuit member formation group. The first and second short-circuit member formation groups are fixed to each other by crimping projections, which are formed on the second short-circuit member formation group through punching, in a state inserted through holes, which are formed in the second short-circuit member formation group.

Abstract: A motor has a plurality of excitation coils, a commutator having a plurality of segments, a plurality of supply brushes and a short-circuit line. Each coil is connected to corresponding ones of the segments. The supply brushes include a plurality of supply brushes each having one of an anode and a cathode. At least one supply brush has the other one of an anode and a cathode. The supply brushes each simultaneously contact different one of the segments. The short-circuit line short-circuits segments that simultaneously contact the supply brushes of the same pole. The supply brushes of the same pole separate from the short-circuited segments at different times.

Abstract: A motor has twenty-four segments and a commutator. Each of eight short-circuit members short-circuits three of the segments with one another. Each short-circuit member includes an annular base portion and three arms radially extending from the base portion. Each arm is connected to one of the three segments to be short-circuited. Each arm has a segment connection portion at the distal end. The segment connection portion is connected to the corresponding segment. The base portions are laminated in the axial direction of the commutator such that the short-circuit members form a laminated body. The arms are formed such that all the segment connection portions are located in the same position with respect to the axial direction of the laminated body. As a result, the manufacture of the motor is facilitated.

Abstract: An armature includes a plurality of equalizing connectors for permanently electrically connecting pairs of commutator segments that should have the same electric potential, so that each of the pairs of the commutator segments that should have the same electric potential has a substantially equal electrical potential. In one embodiment, at least one pair of adjacent coil portions share a common slot.

Abstract: A motor has a plurality of excitation coils, a commutator having a plurality of segments, a plurality of supply brushes and a short-circuit line. Each coil is connected to corresponding ones of the segments. The supply brushes include a plurality of supply brushes each having one of an anode and a cathode. At least one supply brush has the other one of an anode and a cathode. The supply brushes each simultaneously contact different one of the segments. The short-circuit line short-circuits segments that simultaneously contact the supply brushes of the same pole. The supply brushes of the same pole separate from the short-circuited segments at different times.

Abstract: A motor includes a commutator, which has twenty-four segments. Each of eight short-circuit members is connected to three of the segments. Each short-circuit member extends in an arcuate form in an angular range corresponding to arranging positions of three segments to be connected to the short-circuit member. The eight short-circuit members are laminated to form a multiple-layer structure in the axial direction of the commutator. The short-circuit members form a substantially cylindrical laminated body. The short-circuit members are formed and arranged such that the number of the layers of the laminated body is less than the number of the short-circuit members. As a result, the axial dimension of the laminated body is reduced and the miniaturization of the motor in the axial direction is achieved.

Abstract: Commutator segments are divided into a plurality of groups, each of which includes two or more of the commutator segments. Generally planar short-circuiting parts are respectively provided to the groups of the commutator segments and are located radially inward of the commutator segments in such a manner that the short-circuiting parts are spaced one after the other in an axial direction of the commutator. Each short-circuiting part is seamlessly and integrally formed with and is electrically connected to a corresponding sub-element of each commutator segment of a corresponding one of the groups of the commutator segments, and at least one of the short-circuiting parts is located within an axial extent of at least one of power supply brushes measured in the axial direction of the commutator. A dielectric body securely holds each commutator segment and each short-circuiting part.

Abstract: An improved flat or cylindrical mechanical electric commutator with neutral segments (4) between the current carrying segments which allow the current carrying carbon brushes (11, 12, 13, 14) in a brush holder (7) to pass from a negative current carrying segment to a positive current carrying segment or the opposite charge current in the base of the commutator without allowing the face or any part of the carbon brush to touch both the negative and positive segments in the base of the commutator at the same time, resulting in the switching of the electric current to an energized coil of an electric motor, electrical generator or electric apparatus or device, at predetermined intervals and times to suit the design requirements of the energized coil, electric motor of the stepper, brushless DC and switched design, electric generator or electric apparatus or device, while the commutator can accommodate single phase electrical circuits, double phase electrical circuits, three phase electrical circuits or any numbe

Abstract: A motor includes a commutator, which has twenty-four segments. Each of eight short-circuit members is connected to three of the segments. Each short-circuit member extends in an arcuate form in an angular range corresponding to arranging positions of three segments to be connected to the short-circuit member. The eight short-circuit members are laminated to form a multiple-layer structure in the axial direction of the commutator. The short-circuit members form a substantially cylindrical laminated body. The short-circuit members are formed and arranged such that the number of the layers of the laminated body is less than the number of the short-circuit members. As a result, the axial dimension of the laminated body is reduced and the miniaturization of the motor in the axial direction is achieved.

Abstract: A commutator having even number (2n) of commutator segments and n segment pairs, each pair consisting of two commutator segments positioned symmetrically with respect to a commutator center, is mounted on a rotor of an electric rotary machine. The commutator segments are electrically insulated from one another, while the commutator segments in each pair are electrically connected to each other. A metallic base plate and a carbon segment plate are molded together with resin, and then the commutator segments are separated into individual segments. Connecting portions for electrically connecting the commutator segments in each pair are formed integrally with the metallic base plate at positions depressed from a surface of the metallic base plate, so that the connecting portions are not cut in the process of separating the segment plate into individual commutator segments.

Abstract: A rotor includes four magnetic poles provided in a rotational direction at intervals of 90 degrees. A stator includes a winding group for rotation and a winding group for levitation. Each of the winding groups has concentrated windings spaced at intervals of 30 degrees in a rotational direction to provide induction conductive winding sections at twelve locations. Each two of the induction conductive winding sections spaced at an interval of 90 degrees among the twelve induction conductive winding sections are connected to form one winding set such that six winding sets are formed in total in each of the winding groups. Current for rotation and current for levitation are conducted through the six winding sets in the windings for rotation and levitation to perform rotation and levitation controls of the rotor.

Abstract: A coil-winding method comprises: winding first coil clockwise around first, counterclockwise around second, and clockwise around third swath along mandrel, hooks grouped into swaths; winding second coil clockwise around between first arid second hooks of first to between first and second hooks of second swath, counterclockwise around from between first and second hooks of second to between first and second hooks of third swath, clockwise around between first and second hooks of third to between first and second hooks of first swath; winding third coil clockwise around between second and third hooks of first to between second and third hooks of second swath, counterclockwise around from between second and third hooks of second to between second and third hooks of third swath, clockwise around between second and third hooks of third to between second and third hooks of first swath; and releasing wound coils.

Abstract: In a twisting formation method having an inside jig provided in a ring shape with inside holding portions for folding one of the straight portions of a near letter U shaped wire and an outside jig provided in a shape of ring concentric with that of the inside holding portions with outside holding portions for folding the other of the straight portions, the connecting portion of the near letter U shaped wire being formed in a twisted shape by rotating relatively the inside and outside jigs, the method includes urging leading ends of the straight portions and the connecting portion in a contracting direction.

Abstract: A motor for an electric power steering assembly includes a yoke, a multipolar magnetic field portion composed of at least four poles secured to the inner wall of the yoke, a shaft disposed within the yoke so as to be able to rotate freely, an armature secured to the shaft having a winding constructed by winding wiring into an even number of slots formed on the outer circumferential surface of a core so as to extend in the axial direction thereof, a commutator comprising a plurality of segments secured to an end portion of the shaft; and a plurality of brushes contacting the surface of the commutator.

Abstract: A commutator motor comprises a yoke, a magnetic field portion secured to the inner wall of the yoke, a shaft disposed within the yoke so as to be able to rotate freely, an armature secured to the shaft having windings constructed by winding wire by a lap-winding method into slots formed on the outer circumferential surface of a core, a commutator including a resin portion and a plurality of segments held on an outer circumferential portion of the insulating resin portion with the spaces between adjacent segments being held by the insulating resin portion, a plurality of brushes contacting the surface of the commutator, and terminals electrically connecting segments which are to have the same electric potential.

Abstract: A dynamo-electric machine comprises a shaft, a core secured to the shaft having slots formed therein extending in the axial direction, a winding composed of a wiring wound by a lap winding method through the slots, a commutator having commutator segments disposed at one end of the core and secured to the shaft, and equalizing connectors electrically connecting commutator segments which should have the same electric potential to each other, wherein the equalizing connectors are disposed in close contact with an end surface of the commutator.

Abstract: A commutator assembly for an electric motor includes a commutator having commutator segments arranged circumferentially, brushes contacting the commutator segments, and an equalizer connecting commutator segments so they have the same electric potential, the equalizer including printed circuit boards with insulating substrates and a connecting plate having an electrically conducting film on the insulating substrate, electrically connected to the commutator segments.

Abstract: A dynamo-electric machine satisfies an expressionR.sub.eq .gtoreq.(.rho..sub.0 .multidot.(r1*.tau.)/(S/3))*(2.5)where .rho..sub.0 (.OMEGA..multidot.m) is the resistivity of armature coil, S (m.sup.2) is the cross-sectional area of the conductor portions thereof, r1 (m) is radius of rotation of the connecting portions between equalizers and armature circuits, namely the armature coil, risers, or commutator segments, .tau. (rad) is the pitch of pole pairs, and R.sub.eq (.OMEGA.) is the resistance value of the equalizer.

Abstract: A dynamo-electric machine comprises an armature having a winding composed of a wire or wires wound by a lap winding method through slots extending in the axial direction formed on the outer circumferential surface of a core secured to a shaft, a commutator having commutator segments secured to the shaft, and an equalize disposed adjacent to the commutator in the direction of the axis of the commutator having terminals stacked in the axial direction which electrically connect commutator segments which should have the same electric potential.

Abstract: A commutator for a dynamo-electric machine according to the present invention comprises a cylindrical commutator main body provided with a plurality of commutator segments disposed around the circumference thereof, an equalizer assembly disposed inside the commutator main body provided with equalizer segments electrically connecting commutator segments which are to have the same electric potential, and an insulating resin portion disposed within the space inside the commutator main body integrating the commutator main body and the equalizer assembly.

Abstract: A process is disclosed for fastening windings in a permanent and reliable manner without reducing the cooling cross-sections. Doses of an electroconductive elastomer are introduced for that purpose approximately in the middle of the partial bundle of lamination, on the top of the bar and/or on intermediate pieces. The elastomer material (9) is pushed upwards when the bottom bars (3) are pressed in or flows towards the middle of the conductive bar when the intermediate pieces (7) are laid in. No elastomer flows into the core ducts (10) of the partial bundles of laminations (11), so that the cooling cross-section is not narrowed. It thus becomes possible for the first time to glue the winding to the bundle of laminations in an elastic and stress-free manner. The main advantage however is that the dosed introduction of elastomer does not reduce the core ducts nor their cross-section.

Abstract: A rotor structure for dynamoelectric machines includes a central shaft, defining a rotation axis, which supports main rotor windings. A winding support is disposed about and secured to the shaft and an encapsulated equalizer winding assembly is supported by said winding support. An expansion member is positioned between at least a portion of said encapsulated equalizer winding assembly and said winding support and an insulating resin covers at least exposed, proximate portions of said winding support, said expansion member and said encapsulated equalizer winding assembly.

Abstract: A stator winding configuration employs graded, overlapping stator winding coil groups. The outer coils of the coil group have a reduced number of turns with respect to the center coil or coils of the group. The coil groups have an expanded coil group width. The outer coils of adjacent, expanded width coil groups are overlapped by placing the reduced turn outer coils in common slots in the stator core.

Abstract: At least one circumferential slot is provided at a predetermined axial position on an armature core so as to cross axial slots receiving a plurality of coil sides of an armature winding and to communicate adjacent axial slots, and the plurality of coil sides to be generally mounted in the same axial slot are partially shifted from one slot to an adjacent one through the circumferential slot so that the coil sides of the armature winding are partially arranged to extend through adjacent slots at a fixed, predetermined circumferential distance. In this manner, the generation of commutating spark is substantially prevented and the commutating performance is improved.

Abstract: A superconductive field winding is provided for the rotor of a dynamoelectric machine. The winding consists of a number of multi-turn coils of a superconductive conductor which are wound about the periphery of the rotor thereby defining at least one pole pair. Selected coils of each pole pair are series-connected in groups of two coils or more and all of the series connected coil groups are connected in parallel one to another. Resistance elements connected in series with the parallel connected coils cause the current density of coil conductors disposed in regions of high field intensity to be reduced in relation to the current density of conductors lying in regions of low field intensity, thereby allowing the use of higher source current. A net increase in the useful external magnetic field is therefore obtained for a given amount of superconductive material.