Abstract: The invention relates to a method of manufacturing a band coil by means of a material-removing process performed on the coils so as to obtain a band coil which has a profile in the direction of the coil axis. Such a process may be a discharge process, an etching process or a mechanical grinding process. The obtained band coils may have such a shape that certain coil sides are effective whereas other coil sides are interfering as little as possible. Such band coils can be very successful in planar motors.

Abstract: The present invention provides a dynamo-electric machine that prevents the lead portions of the coil portions disposed at places, at which mechanical balance is provided, from intersecting each other, that enhances the workability in manufacturing the wiring by wiring a conductor, and that suppresses the defective insulation of the winding. This dynamo-electric machine for use in an electric power steering system has a yoke, n (incidentally, “n” is a common divisor of the number of the magnetic poles and the number of the slots and equal to or more than 2) of the coil portions are parallel-connected between the segments. Moreover, the coil portions are disposed in such a manner as to be symmetrical with respect to a mechanical angle of 360 degrees. Lead parts of the coil portions other than one of the coil portions, which is nearest in a circumferential direction to each of the segments, are drawn therefrom in the same circumferential 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 motor for an electric power steering assembly includes a yoke, a multi-polar 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 including a plurality of segments secured to an end portion of the shaft; and a plurality of brushes contacting the surface of the commutator.

Abstract: In a three phase armature winding for a dynamo-electric machine, each phase of the winding comprises a first phase belt for (3n+2) slots and a second phase belt for (3n+1) slots. Three parallel connected circuits each constituting series connected coils per circuit. Each series coil per circuit has an upper coil piece and a lower coil piece connected thereto in series. Each of the upper and lower coil pieces has one connection side end portion and other non-connection side end portion. The first phase belt houses (3n+2) series coils of the circuits and the second phase belt houses (3n+1) series coils thereof. When the circuits in each phase are designated circuit numbers, the circuits in each phase are arranged so that a circuit sequence of the upper coil pieces in each phase belt and a circuit sequence of the lower coil pieces therein are substantially the same.

Abstract: A stator of a rotating electric machine is obtained which has a winding improved in assemblability. The stator has three phase winding 10 which is comprised of respective phase winding sections 11 through 13 electrically connected with each other, the respective phase winding sections 10 through 13 including straight portions 11a through 13a of a rectangular cross section inserted in the slots and connecting portions 11b through 13b connecting between ends of adjacent ones of the straight portions 11a through 13a. The respective phase winding sections includes a plurality of conductor segment units wound in a spiral manner with four corners each bent substantially at right angles. The respective phase winding sections have the straight portions 11a through 13a and the connecting portions 11b through 13b.

Abstract: A stator for an automotive alternator includes a stator core having a number of slots, and a polyphase stator winding installed in the slots, the stator winding being constructed by joining a number of segments of electric conductor, and the stator winding includes a second coil-end portion formed at a first axial end of the stator core, the second coil-end portion being constituted by turn portions of the segments, and a first coil-end portion formed at a second axial end of the stator core, the first coil-end portion being constructed by joining end portions of the segments so as to form a lap winding, each phase of the stator winding being constructed by forming a bridging connection between first and second winding sub-portions each constituting two turns of a lap winding per circumnavigation of the stator core, and the segments of each phase of the stator winding constituting a bridging connection connecting portion between the first and second winding sub-portions, a lead point, and a neutral point bein

Abstract: The coils on the disc-type armature of an electro mechanical machine are all wound in the same direction (rotational sense). The coils on each face of the armature are formed into at least two series connected groups of coils which are disposed on the surface of the member so that each coil of one group is located between two coils from another group, and the two coils at one end of the interleaved groups are connected together.

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 motor having a lap winding structure and a manufacturing method therefor, wherein inserts of two different coils are installed side by side in one slot of a stator in a circumferential direction of the stator. All the coils are inserted in slots in succession. Further, a stator having semi-closed type slots formed by protuberances oriented in different directions, is used to control a reduction in the magnetic flux at the inlet of a slot and also to prevent coils from coming off. In a motor having coils of a plurality of phases for generating a rotating magnetic field at a stator, the contact portion of the coil of the desired phase among the coils of the plurality of phases and a portion rising from a slot toward the axis of a core are aligned and disposed to have a shape which prevents them from interferring with end portions of the coils of other phases.

Abstract: In an alternator stator for vehicle, each of the phase-windings includes first and second coil-end groups at opposite axial ends the stator core. Each of the slots includes radially aligned six layers. Each of the phase-windings comprises a plurality of sets of U-shaped segments disposed in a pair of slots separated from each other by a pole-pitch and a plurality of connection segments formed from the U-shaped segments. Each of the sets includes a large segment having a pair of the conductor members disposed in the innermost and the outermost layers, a medium segment having a pair of the conductor members disposed in the layers inside the innermost and the outermost layers to be surrounded by the large segment at the first coil-end group, a small segment having a pair of conductor members respectively disposed in the middle two layers to be surrounded by the medium segment at the first coil-end group.

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 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 stator winding has a plurality of conductor members forming coil ends, and each of the conductor members of the coil ends is hardened and heat treated to have hardness which changes along the length of conductor members. Therefore, the stiffness of the coil ends changes and resonant vibration of the stator can be reduced.

Abstract: An end turn arrangement for turns in a rotor where individual windings are stacked in tapered radial slots in the rotor, with successive turns having a smaller width in a radial inward direction, the end turns of the individual turns of each stack being vertically aligned along a common edge. The end turns are separated by blocking separators, each including a first anchor component having a first planar exterior surface and a second planar interior engagement surface; and a second slide component having a first non-planar exterior surface and a second planar interior engagement surface; the anchor and slide components having mating guide elements permitting the anchor and slide components to move relative to each other along a straight assembly path.

Abstract: In a stator of an alternator for a vehicle including a stator core and a multi-phase stator winding, the stator winding is composed of a plurality of conductor segments having a pair of conductor members connected with one another to form a first coil-end group disposed on one axial end of the stator core so that first U-turn portions of the conductor segments are surrounded by second U-turn portions of the conductor segments and a second coil-end group disposed on the other axial end of said stator core so that ends of said conductor segments are connected to form lap windings.

Abstract: The present invention provides a electric generator with novel structure, comprising two parts: a stator and a rotor. The stator has rectangle-section winding slots. The stator teeth have sectorial section. Slits are formed extending axially in the yoke and the magnet poles laid on the yoke in the rotor. The stator windings are made up of square-wave open rings with different pitches. The generator of the present invention has much less weight and smaller size, and the manufacturing process is simple, the consuming of copper and silicon steel sheets can be reduced, the efficiency is higher and energy can be saved.

Abstract: The present invention is characterized in that a rotary machine attempts to lower the resistance of each coil and realize improvement of efficiency and miniaturization of a motor by shortening the end portion of a coil to be inserted into a stator, and the constitution thereof is that the coil end portion of a stator coil has a shape that a conductor raised and looped back from a slot provided in the core on the rotor side is closer to the end face of the aforementioned core than a conductor raised and looped back in the aforementioned slot on the opposite side of the rotor, and the aforementioned constitution has a stator coil having a loopback shape passing a location other than above the adjacent slot surface.

Abstract: An axial airgap brushless motor including a rotor having a plurality of permanent magnet poles, and a stator having a plurality of conductor layers and a connecting layer for connecting the conductor layers. The motor is operated by exciting the conducting layers with three phase electric current. The current gives rise to conductor magnetic fields which interact with the rotating magnetic field of the permanent magnets. The magnets are spaced relative to one another to minimize the odd harmonics to thereby minimize torque ripple.

Abstract: A polyphase electric motor includes a stator having a field winding and a field backiron, and a rotor disposed within the stator including a permanent magnet with a plurality of pole pairs, wherein the field winding includes a plurality of coil segments, each coil segment having a plurality of electrically conductive turns of a polygonal shape, the turns in each coil segment having circumferentially opposite sides, the circumferentially opposite sides of relatively adjacent turns being circumferentially offset with respect to one another in the same circumferential direction so that each coil segment occupies a length generally equal to the arcuate length of two pole faces, each coil segment further including a subsegment of turns electrically commutated in accordance with a different one of a plurality of field phases.

Abstract: Known flat winding layers that can be prefabricated and inserted into soft magnetic bodies insufficiently utilize the available space in the grooves and winding overhang of polyphase machines and thus increase the volume and weight of the machine. A new winding design allows high power and force densities to be obtained, thanks to the utilization of the whole available space, and are economic to produce. For that purpose each winding layer (4d) is composed of several conductor lanes (22-24) whose number corresponds to the number of phases. The height of the conductor lanes is reduced at the points (25-33) where they intersect, due to the fact that the conductors are mutually offset, and thus pass over each other inside the layer. By variably adapting the width of the conductor the space in the winding overhang through which the magnetic flow is directed in the soft magnetic body is utilized.

Abstract: In a three-phase four-pole armature winding of the double-layer lap type, three first pole windings of respective phases are dispersively arranged in first divided regions obtained by dividing all the slot region into three equal regions and three second pole windings of the respective phases following the respective first pole windings are dispersively arranged in second divided regions obtained by dividing all the slot region into three equally divided regions. Third and fourth pole windings are dispersively arranged in respective slot regions in the same manner. The first and second divided regions are circumferentially shifted from each other by an electrical angle of 180 degrees. Insertion of all the coils belonging to each of the first to fourth pole windings in all the phases is completed by one coil inserting operation of an automatic coil inserter.

Abstract: A stator winding for a motor comprising main, left and right poles wound by a main winding and auxiliary winding(s) which enable relatively continuous commutation angle adjustment by imparting different excitation currents upon the different windings. The auxiliary windings accommodate load variations in all types of motors. In addition, circuitry is disclosed for incorporating the auxiliary windings in a bi-directional motor for facilitating reversal of rotation.

Abstract: A slotless, brushless, large air gap electric motor comprises a stator having a field winding and field backiron, the field winding being composed of a plurality of successively offset polygonal shaped turns so as to provide a substantially flat winding, and a rotor disposed within the stator including a shaft with a permanent magnet mounted thereon. The field winding turns are preferably in the shape of a rectangle or a hexagonal. Also disclosed is a commutation scheme which dissipates energy stored in a section of the field winding previously energized to the section of the field winding subsequently energized; an integrated circuit for control of any motor using that commutation scheme; a winding configuration suitable for use with both an alternating and direct current power supply; and efficiency increasing magnetically permeable flux shorting elements.

Abstract: A high start/stop cyclic capability connector to interconnect the field coil poles in a rotating electric machine. The connector includes a U-shaped intermediate portion with parallel jaws which include extensions perpendicular to the faces of the jaws a distance significantly greater than the width of the jaws, and with connecting pads configured for matching connection to the field coils and orienting the connector such that start/stop inertial forces are applied in the radial direction which causes circumferential flexure of the connector, and flexure due to thermal cycling is in the circumferential direction.

Abstract: A D.C. rotary electric machine comprises an armature winding having a plurality of unit coils shifted from each other by a predetermined electrical angle and a commutator having a plurality of commutator segments. Each unit coil includes a pair of coil sides and is connected between two commutator segments. The unit coils are positioned with respect to the commutator segments so that an axial line passing through the midpoint between the pair of coil sides of each unit coil is circumferentially advanced by a predetermined angle with respect to an axial line passing through the midpoint between the commutator segments to which the coil unit is connected.

Abstract: An electrical machine comprises a rotor (2) and a stator (5) as machine parts, means for generating an excitation flux, and active coils (W1-W5). In operation the coils link at least a portion of the excitation flux and generate a rotational e.m.f. The rotor and the stator comprise poles, the number of stator poles (N1-N6, S1-S6) differing from the number of rotor poles (T1.sup.x -T5.sup.x). During operation, the flux pattern of the portion of the excitation flux linking with the active coils rotates relative to the machine part carrying the active coils with such an angular velocity that the absolute value of the difference between said angular velocity and the angular velocity of the machine part comprising the active coils is larger than the absolute value of the difference in angular velocity between the rotor and the stator. For this purpose the pole faces (RS) of the rotor poles, viewed in the circumferential direction of the rotor, have a different width than the pole faces (PS) of the stator poles.

Abstract: The present invention includes a rotary converter for converting direct current to altenating current. The rotary converter includes a rotor and a stator. The rotor includes a shaft, a commutator concentric with the shaft, and an armature core concentric with the shaft and adjacent the commutator, the core having slots in its outer circumference parallel to the axis of the shaft. At least one slip ring is mounted on the shaft adjacent the armature core. A first or direct current winding is electrically connected to the commutator and wound in a wave pattern through the armature cores slots. A second or alternating current winding is electrically connected to at least one slip ring and wound in a series of alternating clockwise and counterclockwise loops through the armature core slots. The rotary converter is particularly suitable for operation from a standard twelve volt battery to supply alternating current at a desired rating to electric tools and the like.

Abstract: A cup-shaped winding for use in the rotor or stator of a motor such as a coreless motor or slotless motor makes use of leakage flux as well as magnetic flux in the main direction. The cup-shaped winding consists of wire bands which are lap wound such that they are successively shifted a given angle from one another about the rotating shaft of a core. The winding is shaped into a cylinder or cone. The portion of each wire band which is on the bottom of the cylinder or cone does not surround the rotating shaft and forms two sides that meet at a vertex lying on the periphery of the rotating shaft. The portion of each wire band which is on the curved surface of the cylinder or cone are inclined away from the rotating shaft.

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: An armature winding assembled in an armature core is formed by concentrically continuously winding a plurality of coils having respectively different coil pitches. The starting-end and terminating-end terminal conductors of the plural concentrically continuously wound coils are led out along the opposite coil sides respectively of the coil having the longest coil pitch among the plural coils.

Abstract: A spiral pancake armature winding assembly for a superconducting generator is provided which incorporates inner and outer support tubes along with a middle support tube disposed within the pancake coil assembly itself. A plurality of filler pieces, each of which is shaped to fit within a generally rectangular opening of each pancake coil, are rigidly attached to each other in such a way so as to form a middle support tube which provides mechanical support to the pancake coils and prevents relative circumferential movement between adjacent pancake coils. The inner and outer support tubes are shaped to fit within the bore of the spiral pancake armature winding and around its outer periphery. A plurality of spiral wedges, or ramps, are used in conjunction with the inner and outer support tubes in order to provide an improved fit between the support tubes and the spiral pancake armature winding.

Abstract: Lap wound direct-current dynamoelectric machines may allow excessive currents to flow in single turn windings when such machines are operated at relatively low speeds and/or relatively high voltages, and plural turn windings cannot be practically formed from heavy gauge wire, or from heavy gauge rectangular wire or from rectangular wire, to efficiently fill armature slots. A plural turn, preformed winding is disclosed having two ends for connection to commutator segments substantially adjacent each other on the armature, and with at least four sides defining at least two open turns, for engaging slots in the armature core which are spaced substantially 90.degree. apart for a four pole machine. A three open turn winding is also disclosed. The number of open turns is limited only by space available in the armature coil slots.

Abstract: A pole change dynamo-electric machine with three-phase distributed winding is adapted for reconnection to form either one of two different pole numbers and for operation on either one of two different voltages. The adjacent coils of the winding are divided into N coil groups, N being equal to three times the greater one of the pole numbers. Every twelve adjacent coil groups form a set of coil groups. The beginning and end terminals of the specific coil groups within each set are connected and the rest of the terminals are reconnectable.

Abstract: In the armature of an electrical rotary machine, each of the half coils printed on both surfaces of an insulating disc is made up of a radially extended linear conductor and inner and outer sloped conductors connected to the ends of the linear conductors, the half coils being connected to one another to form complete coils wound around the disc, and the inner conductor is extended along an involute line with a circle as its base circle, which is smaller in diameter than the circle which is formed by the inner ends of the winding conductors.

Abstract: A DC electric motor comprising a tubular support carrying spaced bearings, a shaft journalled in said bearings for coaxial rotation within said support and having a driven end portion extending from a first end length of said tubular support, a rotor comprising a hollow cylindrical rotor body carrying a rotor winding, said rotor body being secured at one end to said extending shaft portion so that the first end length of said tubular support is coaxially freely received within said hollow cylindrical rotor body, a stator surrounding said rotor, and a commutator mounted to said shaft end portion at the exterior side of said rotor body remote from said tubular support.

Abstract: In an induction and universal motor combined in a common lamination stack and supplied from a single phase line in line with a single armature winding system common to universal commutator motor as well as to induction motor operation, there are connected to the same segments of the commutator a crossed lap winding and an uncrossed lap winding, the coil span of which corresponds approximately to one pole pitch of the low pole and, in particular, two pole commutator stator winding and to an uneven integral multiple of the high pole induction motor stator winding, to provide a motor particularly suited for driving automatic washing machines.

Abstract: A direct current motor, having armature windings superposed on each other in double layers, is provided with a fixed field magnet having 2 mn poles (m being a positive integer of 1 or more, n a positive integer of 2 or more) magnetized alternately to N and S polarities in equal angular spaces, a magnetic material member for closing the magnetic path of the field magnet, rotating shaft supported by bearings provided in the housing of the motor, and an armature secured to the shaft for rotation in the magnetic path facing to the field magnet poles. A first series of m(2n-1) armature windings mounted on the armature are juxtaposed side by side at equal pitches, the angular spacing between the conductor portions of the windings, which contribute to generate torque, being equal to the angular width of the field magnet pole.

Abstract: A direct current electric machine with an ironless skew wound rotor coil rotating in the air gap of a stationary magnetic circuit is disclosed, wherein the rotor coil comprises a plurality of coil sections each connected by its ends to two corresponding collector segments and each section is constituted by at least two parts. The said parts are groups of adjacent wire turns which groups are placed side by side on the rotor cylinder and are connected in parallel to the collector segments corresponding to the coil section.

Abstract: An ironless rotor of high accuracy is provided readily and simply by coiling an elongated conductor into a plurality of hexagonal windings with a predetermined thickness, wrapping the windings around a cylindrical core member in such a manner that any overlap of the windings does not exceed two layers, and shaping the windings into an integral cylindrical form. Such ironless rotor is applicable to miniature electric motors to enhance the efficiency of the latter.

Abstract: A discoidal winding structure for an axial gap dynamoelectric machine is made in segments. Each segment is in the general shape of a sector of the discoid and contains a fraction of the total number of winding coils, and these coils are bonded together with a resinous material into a rigid structural member. Means are provided for securing the segments together in a rigid discoidal winding structure.