Abstract: A permanent magnet electric motor includes a rotor and a stator magnetically coupled to the rotor. The rotor includes a shaft, a rotor core fixed to the shaft and having n teeth, n being an integer, a commutator fixed to the shaft adjacent the rotor core and having m segments, m being an even number less than n. Rotor windings are wound about the teeth and connected to the segments. The stator includes a plurality of permanent magnets surrounding the rotor core and brushes in sliding electrical contact with the commutator.

Abstract: An electric motor includes: a rotor; a stator; and brush gear. The rotor has a shaft, a rotor core and a commutator fitted to the shaft. The rotor core has 5n teeth, n being a positive integer. Two coils are wound on each tooth with each coil being wound about a single tooth and having two ends. The commutator has 10n bars forming a brush contact surface. The stator includes a yoke and a plurality of permanent magnets installed at an inner surface of the yoke and facing the rotor core. The ends of the two coils wound on each tooth are respectively connected to two pairs of adjacent bars and the center line between one pair of the two pairs of adjacent bars and the center line between the other pair of the two pairs of adjacent bars are diametrically opposed.

Abstract: A commutator 10 comprises an electrically non-conductive base 12; and a plurality of electrically conducting segments 16 supported by the base 12. Each segment 16 comprising a first electrically conductive inner layer 18 provided on the base 12, and a second electrically conductive outer layer 20 fixed to the inner layer 18. The inner and outer layers 18, 20 have opposing surfaces 21, 22 which abut each other, once the commutator is assembled. An opening, preferably being a recess 30, for receiving flux and/or air during the fixing of the outer layer to the inner layer is provided in at least one of the opposing surfaces 21, 22. There is also provided a DC electric motor which includes such a commutator 10.

Abstract: A carbon commutator, for an electric motor, has a plurality of segments forming a brush contact surface and a hub supporting the segments. Each segment has a connector having a terminal for connection of a lead wire, a carbon layer forming the brush contact surface, and a connecting layer fixed to the carbon layer and electrically connecting the carbon layer to the connector. A plurality of micro structures is formed at the interface between the connecting layer and the carbon layer.

Abstract: A motor arrangement between the movable body and the commutation system comprising movable body coils assembling, wherein said movable body coils assembling are energized for short periods of time of an electric cycle in order to initiate a movement at the movable body. The current applied to the coils assembling is stopped during a passive phase in order to complete a rotary motion based primarily to the magnetic relation between the static body and the movable body, more particularly the magnetic relation between the coils assembling and the permanent magnets in order to reduce the heat and energy consumption and therefore increasing the motor life.

Abstract: A dc motor is provided which is equipped with brushes each of which is urged by a spring pressure into constant abutment with a commutator surface. A plurality of protrusions are arrayed on the commutator surface in a direction perpendicular to a direction in which a commutator is to be rotated and extend over a whole of a circumference of the commutator surface. Each of the protrusions is defined by two side walls arrayed adjacent each other. At least one of the two side walls of each of the protrusions is oriented to be inclined at a preselected angle to the orientation of the spring pressure. The preselected angle lies within a range of 20° to 70°. This ensures the stability of the abutment of the brush with the commutator surface, thus enhancing the startability of the dc motor.

Abstract: A slip ring module (76) for a rotor (40) of an electrical machine (10), in particular, an alternator is disclosed, comprising at least one first slip ring (79) with at least one first connecting conductor (103) held in sections of an insulation material (101) for the slip ring module (76), in electrically conducting connection with at least one first slip ring (79) and with an end (115) of the connection conductor (103), facing away from the first slip ring (79), provided for connection to an excitation coil (61). The invention is characterised in that the slip ring module (76) has a further formed conductor (139) forming a direct electrical connection from the first connection conductor (103) to a surface (142) of the slip ring module (76). An electric machine is also provided, in particular, an alternator for motor vehicles, comprising a rotor (40), supporting an excitation coil (61), said slip ring module (76) providing the power supply to the excitation coil (61).

Abstract: A contact system for energizing an electromagnetic engine includes a fixed first contact set connected to an electrical power source and having an axial face and a first electrical connector disposed on at least a portion of the axial face. The contact system includes a rotatable second contact set having an axial face adjacent the axial face of the first contact set and a plurality of spaced apart second electrical connectors extending along the axial face. The second electrical connectors are connected to a set of electromagnetic coils and energize a predetermined number of the electromagnetic coils when the second electrical connectors engage with the first electrical connector during rotation of the second contact set. The present invention also provides an electromagnetic engine having a housing, a first contact set, a controller, and stator ring and rotor assemblies that produce an electromotive force to spin a shaft of the engine.

Abstract: The invention describes an electrical machine having an armature with armature slots for accommodating armature coils. At least one armature coil is formed from two coil elements which are arranged symmetrically with respect to one another in relation to an axis of symmetry, which runs through the center-point of the armature shaft. The coil elements are connected to two adjacent commutator laminates of a commutator. A first brush, a second brush and a third brush bear against the commutator in a manner such that they can slide. The second brush interacts with the first brush or the third brush.

Abstract: There is described an electrical machine with a rotor shaft, a slip ring, arranged on the rotor shaft, and at least two sliding contacts arranged along the circumference of the slip ring for producing an electrical connection with the slip ring. The electrical machine has one or more extraction devices arranged between the at least two sliding contacts directly via the slip ring and intended for extracting abraded material produced at the slip ring.

Abstract: Provided is a vibration motor including a supporting shaft, a rotor rotatably coupled to the supporting shaft, a stator facing the rotor, and a case having a lower plate where the supporting shaft and the stator are coupled, an upper plate facing the lower plate and the rotor, and having at least a portion having a first thickness and a portion having a second thickness greater than the first thickness at a position adjacent to the supporting shaft, and a side plate extending from the upper plate to couple to the lower plate.

Abstract: A brushless slip ring has a first conductive rotating member, and a second conductive non-rotating member that is positioned a predetermined distance away from the first conductive rotating member. A conductive semi-solid material electrically couples the first conductive rotating member to the second conductive non-rotating member. The semi-solid material is configured to transfer electric current from the rotating member to the non-rotating member.

Abstract: A direct current motor including a rotor, a stator, a brush holder, and a brush. The rotor includes a core, a plurality of commutator segments, and a plurality of segment coils. The core has a plurality of teeth arranged along a circumferential direction of the rotor. A slot is formed between adjacent ones of the teeth in the circumferential direction. The plurality of commutator segments are arranged along the circumferential direction of the rotor inward from the plurality of teeth in the radial direction of the rotor. Each segment coil includes a plurality of segment conductors electrically connected to each other. The plurality of segment conductors in each segment coil extends through the slots along the axial direction of the rotor.

Abstract: An object of the present invention is to provide a commutator or brush material for a small electric DC motor which enables a lengthened operating life of a spindle motor for a DVD controlled using a pulse current. A commutator material for a small electric DC motor in accordance with the present invention is characterized by being composed of 6.0 to 10.0 wt % of Cu, 1.0 to 5.0 wt % of ZnO, and a balance of Ag and in that Cu metal particles and ZnO particles are dispersed in an AgCu matrix. A brush material for a small electric DC motor in accordance with the present invention is characterized by being composed of 0.1 to 5.0 wt % of MgO and a balance of Ag and in that MgO particles are dispersed in an Ag matrix, or is characterized by being composed of 5.0 to 15.0 wt % of Ni and a balance of Pt and in that Ni is dissolved in a Pt matrix.

Abstract: A fuel pump assembly includes a fuel pump, and an electric motor for rotatably driving the fuel pump and including a motor armature and a commutator positioned between the motor armature and the fuel pump.

Abstract: Assembly work of an electric motor in which a power supply device and a rotation detector both equipped in a motor case are connected to a control device via a connector unit can be made easy. A power window motor includes an armature provided with an armature shaft and a motor yoke rotatably accommodating the armature. A gear case is fixed to the motor yoke, and a power supply unit that supplies a driving current to the armature is equipped to the gear case in the axial direction of the armature shaft. A sensor unit that detects rotation of the armature shaft is attached to the power supply unit in the axial direction of the armature shaft. A connector unit for connecting the power supply unit and the sensor unit to the control device is integrally formed with the power supply unit. The power supply unit is attached with the sensor unit in advance and then equipped to the gear case.

Abstract: A short-circuit member includes a short-circuit conductor and a short-circuit insulator. The short-circuit conductor includes superimposed first and second short-circuit member formation groups. Each of the short-circuit member formation groups has outer terminals, inner terminals, and linking portions. The outer terminals contact one another and the inner terminals contact one another between each of the short-circuit member formation groups. The linking portions are maintained in non-contact between each of the short-circuit member formation groups.

Abstract: [Problem to be Solved] There is provided a highly wear-resistant and durable sliding contact material applicable to a commutator of a motor used for high-capacity applications in which the initial starting current (IS) is 1 ampere or higher. [Solution] The present invention provides a sliding contact material in which metal oxide particles are dispersed in an Ag alloy matrix, wherein the Ag alloy matrix is an Ag alloy containing 0.01 to 10.0 wt % of at least one kind of Fe, Co, Ni and Cu in Ag, and 0.1 to 3.0 wt % of a Ta oxide is dispersed as the metal oxide. In the present invention, 0.1 to 10.0 wt % of metal oxide particles of one kind or two or more kinds of Mg, Fe, Co, Ni and Zn may further be dispersed. The sliding contact material is used in a mode of clad composite material formed by embedding the sliding contact material in a part of a base material consisting of Cu or Cu alloy.

Abstract: An electric rotary machine which may be employed as a dc motor in an automotive engine starter. The motor includes an armature equipped with an armature shaft, a commutator, brushes, and a bearing retaining an end of the armature shaft. The surface of the commutator has a plurality of protrusions extending in parallel to each other in a direction of rotation of the commutator. Each of the brushes has formed in the bottom thereof grooves in which the protrusions of the commutator are fit. The brushes are urged into constant engagement of the grooves with the protrusions on the commutator to establish electrical contacts between the brushes and the commutator and minimize movement of the armature shaft relative to the bearing.

Abstract: A small size permanent magnet direct current motor has a housing accommodating a permanent magnet stator and a wound rotor. The rotor has a rotor core with a diameter of 23 mm±3 mm and 12 poles and a cylindrical commutator. The motor has an output power of more than 25 watts.

Abstract: The electrically-conductive element, in particular for a rotary collector, for transferring electrical current between two parts (2, 24) that are movable relative to each other is covered in one or more layers of electrically-insulating enamel (42), with the exception of an electrical continuity zone (43). The layer(s) of enamel (42) is/are removed, e.g. by chemical, thermal, or mechanical attack. The enamel (42) is selected from the group comprising: polyvinyls, polyurethanes, polyesters, polyester imides, polyamide imides, and polyimides. The layers may be the same or different in chemical nature.

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: A commutator has a tabular holding portion defining a thickness direction. A plurality of segments are arranged in one end in the thickness direction of the holding portion in a radial pattern. Each of the segments has a slidable contact surface which is perpendicular to the thickness direction. A feeding brush is brought into slidable contact with the slidable contact surface. A tabular short-circuit unit short-circuits the segments to be set to the same electric potential with each other. The short-circuit unit is arranged parallel to the slidable contact surface. Accordingly, it is possible to enlarge a cross-sectional area which is perpendicular to a current passing direction of the coupling portion while suppressing an enlargement of a dimension in the axial direction of the commutator.

Abstract: Proposed is an integrated drive element (110) which is particularly suitable for use in an automatic shift transmission of a motor vehicle. The integrated drive element (110) has at least one electric motor (112), with preferably precisely two electric motors (112) being provided which can be used for example for a dual-clutch transmission. Also provided is at least one electronic engine control unit (114) which is designed for controlling the functionality of the at least one electric motor (112). Said electronic engine control unit (114) in turn has a housing (116). The at least one electric motor (112) spatially directly adjoins the housing (116) and/or is at least partially integrated into the at least one housing (116).

Abstract: The present invention provides a carbon commutator and a carbon brush for a fuel pump which have excellent slidability and abrasion resistance, and a fuel pump having the carbon commutator and the carbon brush incorporated therein. In the carbon commutator for a fuel pump, at least a contact portion to contact with a brush contains 0.2 to less than 5% by weight of an amorphous carbon. The carbon brush for a fuel pump to contact with and slide on the carbon commutator contains 0.2 to not more than 5% by weight of an amorphous carbon. The fuel pump includes the carbon commutator having the foregoing structure and the carbon brush having the foregoing structure.

Abstract: A method of manufacturing a commutator main body which has a cylindrical insulating body, and a plurality of segments arranged in an outer circumference of the insulating body. A short-circuit member is arranged in an end in an axial direction of the insulating body. The short-circuit member has a plurality of first short-circuit pieces and a plurality of second short-circuit pieces. A tabular insulating portion covers first coupling portions of the first short-circuit pieces, and second coupling portions of the second short-circuit pieces. The insulating portion has a restriction recess, and the end in the axial direction has a restriction projection. The restriction projection is engaged with the restriction recess, whereby the movement of the short-circuit member in the circumferential direction with respect to the commutator main body is restricted. Accordingly, the assembly of the short-circuit member in the commutator main body is facilitated.

Abstract: A continuous direct current generator comprises a plurality of windings, each being adapted to rotate between two magnetic fields and in unison with a rotator having a plurality of brush contacts. The windings are electrically connected to the brush contacts which deliver current to a split anode-cathode ring within which the rotator rotates. The windings are connected to the brush contacts so as to deliver substantially continuous direct current to the anode-cathode output.

Abstract: An electric motor comprises: a rotor; a stator; and brush gear. The rotor has a shaft, a rotor core and a commutator fitted to the shaft. The rotor core has 5n teeth, n being a positive integer. Two coils are wound in each tooth with each coil being wound about a single tooth and having two ends. The commutator has 10n bars forming a brush contact surface. The stator comprises a yoke and a plurality of permanent magnets installed at an inner surface of the yoke and facing the rotor core. The brush gear has a plurality of carbon brushes arranged to make sliding contact with the brush contact surface of the commutator. The ends of the two coils wound in each tooth are respectively connected to two pairs of adjacent bars and the center line between one pair of the two pairs of adjacent bars and the center line between the other pair of the two pairs of adjacent bars are diametrically opposed.

Abstract: A commutator having a plurality of segments, a short-circuit member assembly, a holding portion, and a plurality of spacing members is disclosed. The short-circuit member assembly includes a plurality of short-circuit pieces. Each short-circuit piece has an outer terminal, an inner terminal arranged radially inward from the outer terminal and circumferentially offset from the outer terminal at a predetermined offset angle, and a connecting portion connecting the inner terminal to the outer terminal. The holding portion covers the segments and at least a portion of the short-circuit member assembly to hold the segments and the short-circuit member assembly. The spacing members each have an insulated support portion and a plurality of insulated spacing projections formed integrally with the support portion. Each support portion extends in a radial direction of the short-circuit member assembly.

Abstract: An electric rotary machine which may be employed as a dc motor in an automotive engine starter. The motor includes an armature equipped with an armature shaft, a commutator, brushes, and a bearing retaining an end of the armature shaft. The surface of the commutator has a plurality of protrusions extending in parallel to each other in a direction of rotation of the commutator. Each of the brushes has formed in the bottom thereof grooves in which the protrusions of the commutator are fit. The brushes are urged into constant engagement of the grooves with the protrusions on the commutator to establish electrical contacts between the brushes and the commutator and minimize movement of the armature shaft relative to the bearing.

Abstract: A commutator connected to armature coils includes circumferentially arranged segments, short-circuit conductors, and a surge absorbing element. The number of the segments is a multiple of the number of the armature coils. The segments include a plurality of pairs of segments. The segments in each pair are adjacent to each other in the circumferential direction. Each segment in each pair is connected to one of the ends of corresponding one of the armature coils. The number of the short-circuit conductors is the same as the number of the armature coils. Each short-circuit conductor short-circuits segments that are at the same potential to each other. Each short-circuit conductor is connected, either directly or via corresponding one of the segments, to the surge absorbing element, so that the surge absorbing element is electrically interposed between the ends of each armature coil.

Abstract: The invention describes an electrical machine having an armature with armature slots for accommodating armature coils, and a commutator with commutator laminates. At least one armature coil is formed from two coil elements, which are arranged symmetrically with respect to one another in relation to the axis of rotation of the armature. The electrical machine is designed such that the number of commutator laminates is an integral multiple of the number of armature slots.

Abstract: In a commutator of a rotary electric machine, each of commutator segments has a low-resistive layer made of a low-resistive material and a high-resistive layer made of a high-resistive material having a specific resistance higher than that of the low-resistive material. The low-resistive material contains a carbonic material and a binder. The high-resistive material contains a carbonic material, a binder and an inorganic substance such as boron nitride. A mixing ratio of the inorganic material to the high-resistive material is more than 20 wt %. Alternatively, a brush, which makes contact with the commutator segments, can have the high-resistive layer and the low-resistive layer.

Abstract: A short-circuiting member for preventing a commutator from being elongated in the axial direction without increasing the types of different components. The short-circuiting member includes components, each having outer and inner circumferences. Each component includes outer circumference terminals arranged along the outer circumference, inner circumference terminals arranged along the inner circumference, and connection portions connecting a corresponding one of the outer circumference terminals and a corresponding one of the inner circumference terminals that are separated from each other by a predetermined angle in a circumferential direction. The outer and inner circumference terminals are substantially formed along the same plane. The components are laminated in a state in which the connection portions of one of the components are reversed to the connection portions of another one of the components.

Abstract: A commutator (10) includes a core (12) having a generally annular periphery (15). A plurality of commutator bars (14) is provided in a spaced relation about the periphery of the core. At least two of the commutator bars have a width different from each other.

Abstract: A motor has a field body having a number of field poles and an armature body having a number of coils which is placed outside of the above described field body in the radial direction. A commutator secured to the armature body has a number of segments to which the coils are respectively connected. The motor has a power supplying part for supplying a current to the coils and a brush holder which is secured to the field body. The brush holder contains an anode side brush device which makes contact with and slides against the commutator and the power supplying part and a cathode side brush device which makes contact with and slides against the commutator and the power supplying part. Accordingly, the efficiency of use of the coils can be increased.

Abstract: An electrical machine having at least four exciter poles in the stator and having a commutator rotor, which has a number of slots pole teeth on its circumference that is greater than the number of exciter poles, and having twice as large a number of commutator laminations, which via at least two carbon brushes serve to supply current to coils which are each wound on one of the pole teeth, and contact bridges each joined together diametrically opposed laminations. When there is an even number of slots, pole teeth and coils, the beginning and end of one coil of the coils disposed on adjacent pole teeth is connected directly to the laminations adjacent to one another, and the beginning and end of the other coil is connected via one of the contact bridges to the laminations adjacent to one another.

Abstract: The present disclosure provides an apparatus and method for the measurement of the width and radial spacing of commutator segments with respect to span. The apparatus utilizes a microprocessor and computer to record and calculate data from both a rotary encoder wheel held in contact with the commutator surface as it turns, and a fiber optic sensor that recognizes commutator segment boundaries. The commutator is rotated for one revolution plus one span to improve convenience and accuracy of the measurements. Output is provided in the form of graphs and charts that show the variation in the different spans around the commutator, and information is also provided as to each bar and insulator.

Abstract: Coils are provided on a plurality of tooth sections of a core. The coils are formed by successively winding a conductor on the tooth sections with at least one tooth section between each successive windings, such that each portion of the conductor extending between two tooth sections located with at least one tooth section therebetween forms a jumper wire extending in the circumferential direction of the core. A commutator has a plurality of claw portions projecting to the outside of the commutator. Each of the claw portions electrically connects one of a plurality of segments to one of the jumper wires. When the core and the commutator are attached to a rotary shaft, each claw portion is arranged at a position corresponding to one of the jumper wires as viewed in the axial direction of the rotary shaft.

Abstract: An axial air-gap rotor includes wound air-core armature coils disposed on one side of a printed wiring board, and a cylindrical commutator disposed at the rotation center. The commutator includes commutator pieces separated from each other by positioning guides provided on the base, and each having a connection terminal integral with and extending axially from an arc-shaped sliding contact portion and flat portion, the printed wiring board further having terminal connection lands for the wound air-core armature coils, and through holes connected to the terminal connection lands in which the distal ends of the connection terminals are fitted and connected on the other side.

Abstract: A rotor, vibration motor having the same, and fabrication method thereof are disclosed. A rotor according to an embodiment of the invention comprises a first layer on which are formed a plurality of commutators, a second to an n-th layer—wherein n is 4 or greater—on which are formed a plurality of patterned coils that are connected with the commutators, insulation layers interposed in-between the first to the n-th layers; blind via holes which connect the commutators of the first layer with the patterned coils formed on the second layer and which connect the patterned coils formed on the (n?1)-th layer with the patterned coils formed on the n-th layer, and a plurality of through holes which connect the patterned coils formed on the second to the (n?1)-th layers, where the patterned coils located on the second to the (n?1)-th layers are connected by means of different through holes.

Abstract: A compact slip ring (20), which is particularly adapted for use in small spaces, is adapted to provide electrical contact between a rotor (22) and a stator (21). The improved slip ring broadly includes an electrically-conductive monofilament (24) having one end (28) mounted on the stator and having a distal end (34); a sleeve (25) mounted on and secured to the marginal end portion of the monofilament, adjacent the distal end; and a fiber bundle (26) having a longitudinal axis (39), one marginal end portion of the fiber bundle being recessed in and secured to the sleeve, the other end of the fiber bundle engaging the rotor such that the longitudinal axis of the fiber bundle will be substantially perpendicular to an imaginary line tangent to the rotor surface at the point of contact with the longitudinal axis.

Abstract: A continuous direct current generator comprises a plurality of windings, each being adapted to rotate between two magnetic fields and in unison with a rotator having a plurality of brush contacts. The windings are electrically connected to the brush contacts which deliver current to a split anode-cathode ring within which the rotator rotates. The windings are connected to the brush contacts so as to deliver substantially continuous direct current to the anode-cathode output.

Abstract: A commutator for an electric machine comprises a support member made from insulating molding compound, a plurality of metal conductor segments (3), disposed thereon in evenly spaced manner around the commutator axis, with terminal elements disposed thereon for a rotor winding, and an interference-suppression device, to which the conductor segments are connected in electrically conductive manner.

Abstract: The number of conductor members in a first conductor member group and the number of conductor members in a second conductor member group are equal to each other. An inner terminal of each conductor member is displaced from an outer terminal of the same conductor member with respect to the circumferential direction of the corresponding conductor member group. Each outer terminal of the first conductor member group is displaced from a corresponding one of the outer terminals of the second conductor member with respect to the circumferential direction of the first conductor member group.

Abstract: A direct current motor including a rotor, a stator, a brush holder, and a brush. The rotor includes a core, a plurality of commutator segments, and a plurality of segment coils. The core has a plurality of teeth arranged along a circumferential direction of the rotor. A slot is formed between adjacent ones of the teeth in the circumferential direction. The plurality of commutator segments are arranged along the circumferential direction of the rotor inward from the plurality of teeth in the radial direction of the rotor. Each segment coil includes a plurality of segment conductors electrically connected to each other. The plurality of segment conductors in each segment coil extends through the slots along the axial direction of the rotor.

Abstract: An efficient and high-performance commutator motor in which both torque enhancement and iron loss reduction are achieved is provided by ensuring a sufficient area occupied by field windings wound on main poles and further suppressing the influence of armature counteractive magnetic flux and reducing pulsating torque. The commutator motor includes a stator and an armature. The stator includes a stator iron core having the main poles and slots and the field windings disposed in the slots. The armature includes an armature iron core having slots and teeth and armature windings wound in the slots. The stator and armature iron cores are formed of laminated steel sheets. The iron cores are formed by etching process. Multiple through holes are formed in the main poles opposed to the air gap positioned on the forward side in the direction of armature rotation by etching process.

Abstract: The invention relates to a commutator comprising a support body (1), a plurality of conductor segments (13) that are secured in said body and a compensation unit (18) comprising several compensation elements (17), which electrically interconnect the conductor segments in pairs or groups. According to the invention, the compensation elements (17) are configured by wire sections (19) that are embedded in the support body. To produce a commutator of this type, at least the ends of the wire sections (19) that form the compensation elements and that are bent accordingly are connected to the assigned conductor segments (13) of an annular structure prior to the injection moulding of the support body (1). The injection moulding die (2) has a plurality of basin-shaped supporting limbs (31), which are arranged concentrically around the axis (5) of one of the sections of the injection moulding and with which the wire sections engage (19).

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: An electric motor has a housing (2) with a stator (3) and a rotor (5) located therein, a rotor bearing (4) for rotatably supporting a rotor shaft (6) around a rotor axis (A), a commutator (7), and a brush holder (8) with carbon brushes (9) associated with the stator (3) and fixed against rotation relative thereto, with the commutator-side rotor bearing (4) being fixedly connected to the brush holder (8) which is supported in a floating manner relative to the housing (2).