Abstract: A commutator main body 11 includes a plurality of commutator pieces 13 arranged along a circumference, the center of which is a rotation axis L of a motor, and a main body insulator 14 holding the commutator pieces. A short-circuit member 12 is arranged on an end portion of the commutator main body 11 and includes a short-circuit conductor 21, which short-circuits predetermined ones of the commutator pieces, and a short-circuit insulator 22, in which the short-circuit member is embedded. A boss is formed integrally with the short-circuit insulator so as to project from the end portion of the commutator main body.

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 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: An electric motor that includes a housing, a rotatable axle, a first field armature, which is disposed substantially around the axle and secured to the axle, and which includes a plurality of first field magnets spaced around the first field armature, a second field armature, which is disposed substantially around the first field armature and secured to the axle, and which includes a plurality of second field magnets spaced around the second field armature, an electromagnetic member, which is disposed between the first field armature and secured to the housing. The electromagnetic member includes a plurality of electromagnets spaced around the electromagnetic member, wherein each electromagnet includes a winding that is electrically coupled to an appropriate current source, wherein each winding is capable of being sequentially electrically coupled to a current source, such that an appropriate current may be sequentially provided to each winding.

Abstract: A fuel pump for supplying fuel drawn from a fuel tank into an internal combustion engine comprises a rotor, a rotation shaft, bearing members and a drawing force generative means. The rotation shaft revolves integrally with the rotor. The bearing members support both axial ends of the rotation shaft. The stator is disposed on an outer circumference of the rotor and surrounds the rotor. The drawing force generative means generates drawing force for drawing fuel from the fuel tank by means of rotation force of the rotor. The rotor has a recess in a center of its axial end portion. Moreover, at least one of the bearing members is disposed in the recess.

Abstract: The invention relates to a face commutator (101) having a supporting body (102) consisting of an electrically insulating material, a large number of connection segments (108) consisting of an electrically conductive material for connecting in each case at least one end of a coil winding, and a large number of contact surface segments (112) which form a contact surface (14) of the face commutator (101), the contact surface segments (112) being mechanically rigidly and electrically conductively connected to the connection segments (108), and the supporting body (102) and/or the connection segments (108) having an integral design, and the supporting body (102) being prefabricated and having openings (118) into which the connection segments (108) are inserted, characterized in that the supporting body (102), at least in sections, is overdimensioned in the region of the openings (118) in relation to the inserted connection segments (108), in that the connection segments (108) are fixed owing to a clamping effect o

Abstract: A commutator for rotation with or by the shaft of a electrical machine has first and second electrically conductive commutator segments provided on a base for electrical engagement with brushes connected to windings. Isolated from and interspersed between the commutator segments are first and second freewheeling segments. A first diode is connected between the first commutator segment and the first freewheeling segment. A second diode is connected between the second commutator segment and the second freewheeling segment. The diodes allow current to flow in only one direction between the commutator and freewheeling segments to help suppress commutation sparking.

Abstract: A direct-current motor includes a stator having a magnetic field system, a rotor disposed around the stator, a commutator which rotates together with the rotor, and power supply brushes which are urged in the axial direction by urging members so as to come into contact with the sliding contact surfaces. The rotor includes an armature core around which armature coils are wound, and a rotary shaft which rotates together with the armature core. The commutator has segments extending radially. The segments have sliding contact surfaces orthogonal to an axial line of the rotary shaft. At least a part of each power supply brush comes into contact with the sliding contact surface at a position further radially outward than the armature coil.

Abstract: A commutator for an electrical machine, in particular for an electric motor for actuating drives in motor vehicles, has a commutator body that supports commutator laminations. To reduce the electromagnetic radiation, emitted into the environment as interfering radiation, that is engendered by spark development in the commutation operation, the commutator body is embodied as a hollow cylinder, and the commutator laminations are disposed on the inner jacket face of the commutator body.

Abstract: A stator has four or more magnetic poles. A commutator has a plurality of segments arranged in the circumferential direction and a short-circuit conductor for short-circuiting predetermined segments from among these segments. Each segment has an angular width WS, and there is a gap of an angular width WU between the segments. A substantial angular width WB of each of an anode brush and a cathode brush satisfies (n?1)(WS+WU)+WU<WB<n(WS+WU)+WU, where n is an integer no less than two. A plurality of coils are each connected to the corresponding one of the segments in order to form n closed loops. The closed loops each pass through the corresponding segments and are electrically independent of each other.

Abstract: A commutator housing for a direct-current motor includes conductive tracks and two Lyre-shaped connectors each inserted in one of the conductive tracks. An overcurrent protection device is inserted in series in the conductive tracks, and electrical connection pins of the overcurrent protection device are fitted into and retained between rods of the Lyre-shaped connectors. The overcurrent protection device is attached to the commutator housing without soldering.

Abstract: The invention relates to a fuel pump which comprises an electric motor. Said electric motor is provided with carbon brushes (11) that cover a plurality of lamellae (17) of a collector (9). Grooves (7) in an armature (6) include sections of a plurality of coils (8), thereby particularly reducing erosion of the carbon brushes (11).

Abstract: A stator of a direct current motor includes six magnetic poles. An armature of the direct current motor includes an armature core having eight slots, a plurality of windings wound around the armature core as concentrated windings, and a commutator having twenty-four segments connected to the windings. The plurality of windings are connected to one another to form a single closed loop. The direct current motor further includes an anode power supply brush and a cathode power supply brush that slidably contact the segments. The aspect ratio, which is the ratio of the diameter of the armature core with respect to the length in the axial direction of the armature core is set to a range of 3.2 through 5.6. This increases the constraint torque/mass ratio of the direct current motor.

Abstract: A motor assembly includes a commutator having a shaft extending axially therefrom, a commutator end bracket assembly, and at least two brushes carried by the commutator end bracket assembly and in contact with the commutator. A disc is carried by the commutator for rotation therewith. The commutator includes a notch and the disc is rotatable therein.

Abstract: A fuel pump includes a case member, which defines a fuel passage and accommodating a pump portion for pumping fuel. A motor portion is provided in the case member, and including a commutator for rectifying electricity supplied to an armature. Positive and negative electrode terminals conduct electricity to the motor portion. An insulative terminal support member supports the positive and negative electrode terminals. Brushes are slidable on the commutator to conduct electricity from the positive and negative electrode terminals to the commutator. Brush springs apply resilient forces to bias the brushes against the commutator. The terminal support member has a load bearing portion abutting against the brush springs to receive reactive forces of the resilient forces.

Abstract: One aspect of the invention is a generator with at least two commutators mounted on a rotatable shaft. At least two magnetically conductive bars may be mounted in an opposed relationship with at least one of the bars passing through a wire coil. At least two magnets may also be mounted in an opposed relationship. The bars and magnets may be mounted such that they extend between the commutators. In various positions, a magnetic field passes through the two commutators, one of the bars and one of the magnets. The magnet field in the bars changes due to rotation of the shaft and current is induced into the wire coil.

Abstract: A vibration motor includes a stator assembly, a rotor assembly, a shaft and a pair of brushes having different osculatory tracks. The stator assembly includes a magnet and a lower substrate. The rotor assembly has an eccentric weight, and includes a commutator positioned on the lower surface thereof and a coil. The shaft is inserted into a rotary center of the rotor assembly for forming a rotary shaft of the rotor assembly.

Abstract: A dynamo electric machine for an aircraft gas turbine engine includes a housing supporting a stator of the dynamo electric machine, a rotor assembly rotatably mounted in the housing and including an elongate hollow rotor shaft, a main shaft for connection at one end to the associated gas turbine engine assembly, said main shaft extending coaxially within said hollow rotor shaft, and a sleeve-like member of electrically insulating material between said rotor shaft and said main shaft, said sleeve-like member providing an electrically insulating driving connection between said main shaft and said rotor shaft whereby said main shaft and said rotor shaft rotate together.

Abstract: A commutation apparatus drives a brushless motor having a stator equipped with a plurality of coils and a rotor. The commutation apparatus comprises a rotatable commutator shaft, two or more conducting rings carried discretely about the shaft, and two or more conducting segments carried discretely about the shaft at staggered positions along or near a plane perpendicularly intersecting the shaft. Each conducting segment is electrically connected to one of the conducting rings. Two or more electrical source contacts are provided for rotatably connecting a power supply across pairs of the conducting rings. A plurality of electrical load contacts is further provided for sequentially, rotatably connecting the conducting segments to discrete coils of the brushless motor.

Abstract: A hand power tool that is driven via an electric motor (20), the electric motor (20) having a commutator (28) which is formed of disklike annular segments or laminations (32), is made more secure against contact spark development by providing that at least one of the laminations (32) has at least one central recess (42, 44, 46).

Abstract: A vibration motor includes a stator assembly, a rotor assembly, a shaft and a pair of brushes having different osculatory tracks. The stator assembly includes a magnet and a lower substrate. The rotor assembly has an eccentric weight, and includes a commutator positioned on the lower surface thereof and a coil. The shaft is inserted into a rotary center of the rotor assembly for forming a rotary shaft of the rotor assembly.

Abstract: A commutator is provided which can be produced at low cost and is excellent in wear resistance and can be used in the fuel pump. The commutator is one in which at least those portions which come into contact with brushes comprise a filler mainly consisting of coke, and a carbonized binder.

Abstract: A commutator includes a support ring and a plurality of conducting segments arranged over a circumference of the support ring. Some of the conducting segments have an electrically insulating portion. The commutator is employed with a device that measures rotation of an electric motor rotor shaft. The commutator is fitted onto the electric motor rotor shaft. A commutator housing includes at least three brushes and comes into contact with the conducting segments of the commutator. At least one of the brushes contacts the electrically insulating portions of the commutator segments to provide an electrical measurement that enables the speed, the direction of rotation and the angular position of the electric motor rotor shaft to be determined.

Abstract: A position sensor generates a signal representative of the angular position and, if desired, angular velocity of a rotating object using only a single circular track and plural brushes that ride on the track when the object rotates. The single circular track can have plural segments, and the sensor can generate more than one signal cycle per revolution.

Abstract: An electric motor intended for driving transport vehicles without a reduction gear is described. The electric motor can have an annular magnetic conductor of the stator with permanent magnets located on opposite sides of the magnetic conductor, and a two-section rotor, one section of which goes round the stator, while the other is inside it. The electric motor provides greater torque.

Abstract: A motor assembly includes a commutator having a shaft extending axially therefrom, a commutator end bracket assembly, and at least two brushes carried by the commutator end bracket assembly and in contact with the commutator. A seal is carried by either the commutator or the commutator end bracket assembly and has engaging contact with the other. The seal may be disposed on either or both sides of the commutator.

Abstract: A commutator includes a generally cylindrical dielectric body and a plurality of commutator segments arranged along an outer peripheral surface of the dielectric body. Each commutator segment includes a ridge, which extends in a direction generally parallel to an axial direction of the commutator and radially inwardly projects into the dielectric body to secure the commutator segment relative to the dielectric body. Each ridge includes alternately arranged high projecting portions and low projecting portions. Each high projecting portion includes grooves, which are obliquely angled relative to the longitudinal direction of the ridge, and protrusions, each of which is bound with one of the grooves and protrudes in an imaginary plane generally perpendicular to the projecting direction of the ridge.

Abstract: A commutator includes six segments disposed in the direction of rotation, and is attached to one axial end of an armature. By the commutator rotating together with the armature, each of the segments successively contacts a brush. Each of the segments is electrically connected with terminals through mid-terminals. Three of the six terminals, non-adjacent and alternatingly located in the direction of rotation, are electrically connected directly with mid-terminals facing in radial opposition. Capacitors are electrically connected directly with the terminals adjacent in the direction of rotation. Discharge does not occur between the brush and segments when the brush separates from the segments accompanying rotation of the armature, since electromagnetic energy built up in the coils of the armature is temporarily built up in the capacitors.

Abstract: A commutator for an electric motor includes a support ring, a plurality of metal segments arranged around a circumference of the support ring, and a plurality of capacitors arranged between the support ring and the metal segments. Each capacitor is connected between two adjacent metal segments.

Abstract: A method of manufacturing a commutator of a rotary electric machine includes a step of forming a first unitary material having nail portions, a step of forming a second unitary material for the commutator segments, a step of fixing the first unitary material and the second unitary material together to form a pre-commutator unit so that the nails extend radially outward from the periphery of the pre-commutator unit, a step of inserting the pre-commutator unit between a pair of dies so that the dies hold the nails without a gap, and a step of charging liquid resinous material into the inside of the dies to mold the pre-commutator unit.

Abstract: A commutator bar (10) includes a body and first and second anchors disposed in spaced relation with each anchor and coupled to a proximal end of the body. A free end of the first anchor (13) extends in a direction towards the proximal end H of the body, and a free end of the second anchor (12) extends in a direction towards a distal end (0) of the body. Third and fourth anchors (17) and (18), are disposed in spaced relation and each have one end coupled to a distal end of the body and a free end extending in a direction towards the proximal end of the body. Fifth and sixth anchors (15) and (16) each have one end coupled to the body at a location between the proximal and distal ends. A free end of the fifth anchor extends toward one side of the body and a free end of the sixth anchor extends toward the other side of body.

Abstract: In order to design as inexpensively as possible a control device for DC motors which are provided with a commutator for feeding their motor windings which has at least four sliding contacts, this device comprising a modulation stage which generates at least one control signal modulated as to pulse width with a clock frequency substantially above the motor speed and a control circuit which is controlled by the at least one control signal and has at least one load branch which feeds the commutator and is provided with an electronic switch controlled by the control signal modulated as to pulse width, it is suggested that the sliding contacts be combined to form at least two control groups, that the sliding contacts be combined within each control group to form pairs of sliding contacts and that each control group have its own load branch associated with it.

Abstract: A commutator 10 is equipped with a magnet 1 for use in detecting and diagnosing motor inefficiencies and problems as well as in adjusting motor parameters to impact motor operation. The commutator comprises a shell 12, an insulating core 14 positioned adjacent the shell, and at least one magnet positioned adjacent the core. Magnetic sensors placed within the motor housing detect and read the flux lines emitted from the magnet on the commutator. The magnet is preferably integrally-formed with the commutator, thereby facilitating its retention in the motor housing, and is preferably manufactured from an electrically non-conductive material and therefore does not impact, in and of itself, the operation of the motor.

Abstract: A commutator 100 for an electric motor includes a body 112 having opposing ends. Commutator bars 118 are attached to a periphery of the body. Oil throw and recovery structure 122 is integral with the body and is disposed at one of the ends of the body. The oil throw and recovery structure 122 flares outwardly from the one end of the body and defines a continuously curved, annular surface 124 terminating in an annular tip 126. The commutator 100 is constructed and arranged to be mounted to a shaft 128 with the oil throw and recovery structure 122 being adjacent to a bearing 132. The oil throw and recovery structure is constructed and arranged to deflect oil, moving from the bearing and contacting the annular surface, in a direction away from the one end of the body with the annular tip directing the oil back to the bearing.

Abstract: A commutator arrangement for a small electric motor with a capacitor ring disk having several capacitor elements, wherein the capacitor ring disk is made of a dielectric first ring disk (RS) on whose upper side several sector-shaped electrode layers (6) are placed. Each of the electrode layers (6) are electrically conductively connected with a commutator segment (13). Counter electrodes of the capacitor elements are provided on an under side opposite the upper side. To improve the interference suppression features a single counter electrode layer (4), which underlies almost the entire surface of the electrode layer (6), is provided on the under side so that the counter electrodes of all capacitor elements have the same potential.

Abstract: A commutator for an electric machine comprises a support member (1) made from an insulating molding compound, a plurality of metal conductor segments (3) disposed thereon in evenly spaced manner around the commutator axis (2), with terminal elements disposed thereon for a rotor winding, and an interference-suppression device (9, 9?), to which the conductor segments (3) are connected in electrically conductive manner and which comprises a number of individual interference-suppression elements (10) corresponding to the number of conductor segments (3), wherein the conductor segments (3) are provided with contact tabs (18), which are respectively connected, at a distance from their root points (19), via associated contact points (23), to the adjoining contact poles (24) of two neighboring interference-suppression elements (10).

Abstract: Rotary switches, and in particular riser-style commutators, are detailed together with featured strips from which they are made. Segments formed from the strips may include anchor notches and slots for receiving reinforcing rings. The structure of the strip additionally permits electrical isolation of adjacent riser segments to occur through its coining rather than through slotting.

Abstract: A surface of a commutator 5 is rubbed by a shakedown brush 21 other than ordinary brushes 11 to produce a carbon coat, whereby a shakedown process can be reduced or abolished.

Abstract: A commutator assembly for a motor has a recessed portion formed to each commutator segment so that coils, which are pressed and deformed by bending the hooks of commutator segments, can be accommodated in the recessed portion. With this arrangement, the commutator assembly can improve the reliability of electric connection of the hook of the commutator segments with a conductive wire.

Abstract: Each of the rotor magnetic poles is composed of a winding around a laminated core and each of both ends of each wound wire is connected to a commutator leg part coupled with a tip of a corresponding commutator segment of the commutator unit. Each of the commutator leg parts comprises a base portion extending outward in a direction substantially normal to the radial direction from the tip of the corresponding commutator segment tip and coupled to the commutator segment tip and a tip portion narrowed stepwise to let the ends of a wound wire be connected. A disk-shaped varistor having a hole at the center is mounted over the base portion of the commutator leg part, and each electrode of the varistor is soldered onto the corresponding base portion. Further, the commutator leg parts are punched and cut out of a reel-wound flat parent metal sheet and fixed to the commutator segment tips.

Abstract: The commutator is capable of reducing contact resistance between the brush and a commutator, improving efficiency of an electric rotary device and restricting exhaustion of the commutator. The commutator comprises: a plurality of commutating pieces having outer faces; and a plurality of sliding members fixed on the outer faces of the commutating pieces, the sliding members including carbon nano fibers or carbon nano tubes whose outermost layers have electric conductivity.

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: The commutator has a cylindrical collector (1), disposed on a motor armature shaft, and electrical-contact means (4, 5), which during one rotation of the collector (1) touch at least two each of a plurality of commutator laminations (3) that are present on the collector (1) and thereby establish an electrical connection between the applicable commutator laminations and external current connections (21, 22).

Abstract: One current passing circuit board is constituted by one metal plate in which a continuous current passing pattern that is to be separated in a plurality of current passing patterns is formed, and molded resin in which the metal plate is inserted. The current passing circuit board is pressed to eliminate the unnecessary portions of the above mentioned current patterns, thereby the one current passing circuit board is formed in a state where the current passing pattern continuously formed is separated in the normal forms.

Abstract: An electric rotating machine and a fan motor for vehicle are obtained, wherein variation width of current waveform resulting from occurrence of coils in a short circuit state is narrowed to reduce vibration and noise. A commutator 26 of the fan motor for vehicle comprises twelve segments 24, and a pair of positive/negative brushes are press-contacted to the commutator 26. Among the segments 24, at least one of pairs of segments that the brushes simultaneously contact have mutually different pitches. Therefore, timing when the coil in the short circuit state occurs at an armature and timing when the coil is released from the short circuit state of one brush deviate from those of the other brush temporally. Accordingly, the variation width of current waveform of electric current supplied to the coil connected to the pair of segments 24 narrows at least.

Abstract: An electric drive unit provides a simple and economical electrical connection of an electric motor and an electronic module. The commutator of the electric motor, a brush rocker ring arranged on the commutator, and the drive shaft of the electric motor as well as the carrier body of the electronic module are inserted into a transmission housing. In the transmission housing, the carrier body of the electronic module is positioned so that contact elements provided on the brush rocker ring engage into contact points provided on the carrier body of the electronic module. The electric drive unit can be used for window lifter drives.

Abstract: A multi-brush cage assembly for a subfractional horsepower electric motor has two brushes 22, 23 received in separate chambers 24, 25 of the cage and urged by springs 26, 27 towards a commutator 15 of the motor. An L-shaped changeover lever 30 is located on a pivot 33 between the chambers and keeps one brush 23 retracted until the other brush 22 has worn out.

Abstract: A miniature PMDC motor has a wound rotor 15 comprising a rotor core 16 and a commutator 17 mounted on a shaft 14. A cooling fan 20 is directly mounted onto the commutator 17 by use of a mechanical snap-fit type connection. Projections 29 on the commutator mate with recesses in the fan 20 to prevent relative rotational movement and detents including resilient fingers 23 and projection surfaces 34 hold the fan axially.

Abstract: The electric machine includes a collector (60), a brush-holder assembly comprising an end cap (26) and a set of members (28, 30, 32, 34) for electrical connection equipped with guide cages (36, 38, 40, 42) suitable for accommodating a respective brush (44), in which a member (64) for limiting the radial displacement of the brushes in the absence of a collector is provided, the dimensions of the limiting member (64) being suitable for obtaining a tight fit of this member on the end cap (26). Application for the mounting of a brush holder for a motor-vehicle starter.

Abstract: Devices for the management of contact spots, partly consisting of surface plating, partly of surface polishing and partly of substrate surface profiling in the form of parallel grooves stretched out in the direction of sliding and/or of isolated asperities. The management of the contact spots is designed to generate, at electrical brush interfaces, a large number of contact spots of pre-determined shapes and distribution that promote low electrical contact resistance and long wear life. Preferably, the substrate is coated with a hard, highly conductive coating that is resistant to wear and chemical attack. The invention is similarly applicable also to electrical switches wherein it will assure reduction of interfacial resistance as well as of sticking forces. Finally, it may also be used for the efficient transfer of heat across interfaces.