Abstract: The present disclosure relates to a motor including: a plurality of terminals; an insert member configured to support the plurality of terminals spaced apart from one another; and a holder configured to surround the plurality of terminals and the insert member, thereby simplifying a structure and a manufacturing process and improving durability.

Abstract: A combination of a motor casing and a plug connection, the motor casing being designed for a drive of movable components of a vehicle, in particular sunroofs, blinds or roofs of convertibles. A plug connection is inserted in the motor casing and a gap is provided between the motor casing and the plug connection. At least one projection is provided in the area of the gap and avoids play between the motor casing and the plug connection.

Abstract: A system for controlling multiple wire feed motors for use in a welding-type system including a push motor controlled to operate at a target wire feed speed and a pull motor disposed in a welding torch controlled to apply a target torque to the fed welding wire. Such a system eliminates shaving and bird nesting of welding wire.

Abstract: Methods and systems are provided for a winch including a motor and a contactor assembly coupled around the motor. In one example, the contactor assembly is coupled around and in face-sharing contact with a portion of an outer surface of the motor. Additionally, the contactor assembly may include two or more coils spaced apart from one another within the contactor assembly.

Abstract: An improved built-in capacitor motor structure includes a housing, a stator portion, an insulating member and a rotor portion. The housing includes a front cover and a rear cover for receiving the stator portion. The stator portion includes a core frame provided with an annular insulating frame body to which the insulating member connects. A plurality of circularly arranged docking units extend from the periphery of one side of the insulating frame body. A plurality of corresponding docking units are provided at the bottom side edge of the insulating member. These corresponding docking units are engaged with the docking units of the insulating frame body, respectively. The rotor portion is received in the stator portion. A capacitor is combined inside an accommodating space of the insulating member in communication with the outside, such that the capacitor is assembled inside the motor. In this way, assembly is easy while electromagnetic field of the motor is less easily affected.

Abstract: A brush box (23) for a brush-holder, which is useful as a housing for an electric machine brush (25). The brush box (23) comprises a lower portion (56) for guiding the brush, connected to a mounting (60), and an upper portion (58) for guiding the brush, the lower (56) and upper (58) guiding portions being open on the side of a front surface (35) and a rear surface of the brush (25). The lower (56) and upper (58) guiding portions are separated from one another by a space (61) enabling a braid of the brush (25) to pass through.

Abstract: In one illustrative embodiment, a power tool may comprise a housing supporting a motor, a primary switch coupled to the housing and configured to control a supply of energy to the motor, and an secondary switch that is reconfigurable between a first position near the primary switch and a second position spaced apart from the first position. When the secondary switch is coupled to the housing in the first position, the primary switch and the secondary switch may be configured such that a user holding the power tool with only one hand can operate both the primary switch and the secondary switch using the one hand. When the secondary switch is coupled to the housing in the second position, the primary switch and the secondary switch may be configured to require the user of the power tool to simultaneously operate the primary switch and the secondary switch using two hands.

Abstract: A rotating electric machine including at least a first terminal and a second terminal, and an electric circuit connected to said two terminals, the electric circuit including a field winding. The rotating electric machine also includes a thermal protection device (7) arranged in the electric machine. The thermal protection device (7) includes a first electric conductor (71) electrically connected to the second terminal, and a heat-sensitive member (8) arranged so as to deform above a predetermined temperature, wherein, above a predetermined temperature, the deformation of the heat-sensitive member (8) actuates a connection means (72) of the thermal protection device in order to electrically connect the first conductor to a second conductor of the electric circuit having a different electric potential than that of the second terminal.

Abstract: A motor includes a rotation shaft, a commutator, power supply brushes, and a brush holder. The brush holder includes an opposing portion that faces an end face of the commutator in an axial direction, a bearing holder, and a diffusion stopper. The diffusion stopper is arranged in a portion of the opposing portion located toward the outer side in the radial direction from the bearing holder and limits the diffusion of abrasion powder of the power supply brushes. The diffusion stopper is projected toward the commutator in the axial direction or recessed in the axial direction.

Abstract: An adjustment drive, in particular a window winder drive of a motor vehicle. The adjustment drive has an electric motor with a brush system, the respective brush of the brush system being connected to a plug contact in order to supply power to the electric motor, and an electronics system housing in which a mating contact, with which the plug contact makes contact, is arranged. In this case, the plug contact is mounted such that it can move in the plug-contact-making direction.

Abstract: A brush holder is held between a flange of a yoke housing and a gear housing of a speed reduction unit and fastened by a fastening screw. A link of the brush holder is located between a screw fastening portion of the flange and a screw fastening portion of the gear housing. A connector is linked to a holder main body by the link. The link includes a screw insertion hole and first and second bridges. A metal terminal, which electrically connects the holder main body and the connector, is embedded in each of the first and second bridges.

Abstract: A windshield wiper motor includes a reduction mechanism unit and an electric motor. The electric motor includes a yoke formed in a bottomed cylindrical shape; four magnets arranged in a cylindrical shape on an inner surface of the yoke, an armature including a rotary shaft rotatably supported by the yoke, an armature core fixed to the rotary shaft and including any teeth of fourteen teeth, eighteen teeth, and twenty two teeth, a commutator being fixed to the rotary shaft and including a plurality of segments insulated from each other with the same number as the number of the teeth of the armature core, an armature coil being wound, and a plurality of connecting wires respectively connected to the segments arranged to face each other around the rotary shaft, and a first brush, a second brush, and a third brush coming into sliding contact with the segments of the commutator.

Abstract: A permanent magnet motor has a stator and a rotor rotatably mounted to the stator. The stator has a housing with n side portions and n connecting portions distributed alternately, wherein n is a integer equal to or greater than 3. Adjacent side portions are interconnected by one of the connecting portions. The radial cross section of each side portion is a convex curved line which is curved outwardly relative to a straight line passing through the two ends of the convex curve line. Permanent magnets are fixed to an inner surface of the housing. An end cap fixed to one end of the housing, has a bottom and n side walls extending from the bottom. A flat mounting surface is formed at the outer surface of a first one of the side walls.

Abstract: The invention relates to a device for supplying electrical current to an electric fan set of a motor vehicle, said device comprising a brush-holder plate (5), for supplying current to the motor of the set, a support (1) for an electronic circuit (3) for supplying said motor, said plate (5) and said support (1) being attached to one another. According to the invention, said device also comprises means (13, 15, 17) for joining the support (1) to the brush-holder plate (5), arranged to ensure a prepositioning relative to one another at the time of assembly.

Abstract: Disclosed is an electric motor including a yoke formed in a bottomed cylindrical shape; permanent magnets arranged on an inner peripheral surface of the yoke; an armature including a rotary shaft journalled on the yoke, an armature core formed with a plurality of teeth and fixed onto the rotary shaft, an armature coil wound around the teeth of the armature core, a commutator having a plurality of segments and being fixed onto the rotary shaft, and a connecting wire connecting two segments arranged to face each other back to back around the rotary shaft, the armature being surrounded by the permanent magnets and accommodated within the yoke; and a first brush, a second brush, and a third brush coming into sliding contact with the segments of the commutator of the armature.

Abstract: Disclosed is a windshield wiper motor having a reduction mechanism unit and an electric motor. The electric motor of the windshield wiper motor includes a yoke formed in a bottomed cylindrical shape; permanent magnets arranged on an inner peripheral surface of the yoke; an armature including a rotary shaft journalled to the yoke, an armature core where a plurality of teeth are formed and fixed onto the rotary shaft, an armature coil wound around teeth of the armature core, a commutator having a plurality of segments and being fixed onto the rotary shaft, and a plurality of connecting wires connecting two segments arranged to face each other back to back around the rotary shaft, being surrounded by the permanent magnets and arranged within the yoke; and a first brush, a second brush, and a third brush coming into sliding contact with the segments of the commutator of the armature.

Abstract: A motor 10 includes: a yoke on whose inner surface a four-pole magnet is attached; a gear case 15 jointed to an opening portion of the yoke and storing a speed-reduction mechanism; a brush holder 30 stored in an opening portion 15a of the gear case and having a through hole 31 penetrated by a commutator 23 attached to an armature shaft 21 in a center of the brush holder; and a first brush 36, a second brush 35, and a third brush 37 which are stored so as to freely come in and out to/from three brush storing portions 32, 33, and 34 formed so as to interpose the through hole 31 in the brush holder 30. In the motor, the second brush 35 is arranged at a position shifted from the first brush 36 in a rotational direction by 90 degrees, and a third brush 37 is arranged within an included angle opposite to an included angle formed by the first brush 36 and the second brush 35.

Abstract: Disclosed is a motor in which a commutator (10) is provided with connecting wires which short-circuit equipotential segments; brushes (21) are constituted by a low-speed brush (21a), a high-speed brush (21b), and a common brush (21c) used in common by the low-speed and high-speed brushes, and are juxtaposed along the circumferential direction. The circumferential brush width (W2) of the high-speed brush is set to be smaller than the circumferential brush width (W1) of the low-speed brush. The high-speed brush and the low-speed brush are formed so that simultaneous sliding contact with equipotential segments (15) can be avoided. Additionally, armature cores (8) are provided such that a plurality of teeth (12) is point-symmetrical about a rotary shaft (3) at equal intervals in the circumferential direction, and the teeth and slots (13) are formed so as to exist alternately at intervals of 90 degrees in the circumferential direction.

Abstract: A device for rectifying the current of a rotary electric machine comprising a bearing (50) with through openings (51) for a coolant, that comprises at least one module (100) including a holder (10, 16) for holding current rectifying members (93, 94) having the same phase as the machine, said holder (10, 16) including a heat sink (16) with vanes (18) at least partially covering an opening (51) in the bearing (50). A rotary electric machine including such a current rectifying device. Application: alternators of automotive vehicles with internal ventilation.

Abstract: Disclosed is a motor in which a commutator (10) is provided with connecting wires which short-circuit equipotential segments; brushes (21) are constituted by a low-speed brush (21a), a high-speed brush (21b), and a common brush (21c) used in common by the low-speed and high-speed brushes, and are juxtaposed along the circumferential direction. The circumferential brush width (W2) of the high-speed brush is set to be smaller than the circumferential brush width (W1) of the low-speed brush. The high-speed brush and the low-speed brush are formed so that simultaneous sliding contact with equipotential segments (15) can be avoided. Additionally, armature cores (8) are provided such that a plurality of teeth (12) is point-symmetrical about a rotary shaft (3) at equal intervals in the circumferential direction, and the teeth and slots (13) are formed so as to exist alternately at intervals of 90 degrees in the circumferential direction.

Abstract: A conductive device for a brush motor has an insulation stand, a conductive sheet and a conductive wheel. The insulation stand has an open end, a closed end, a supporting rod and a power cord. The supporting rod is mounted in the insulation stand near the open end. The power cord is mounted in the insulation stand and has an outer end extending out of the closed end of the insulation stand. The conductive sheet is curved, is mounted in the insulation stand at the open end around the supporting rod and has a middle and two ends. The conductive wheel is a hollow wheel, is rotatably connected to the insulation stand and has an elastic layer and a conductive layer. The elastic layer is mounted around the supporting rod. The conductive layer is mounted around the elastic layer and contacts the conductive sheet.

Abstract: The invention relates to a six-pole DC machine, particularly a DC motor for use in a motor vehicle, having a stator (16) excited preferably by a permanent magnet and a rotor (20) which is rotatably supported in a pole housing (12) and which has a wave winding (23) and a commutator (24), and having a brush carrier (28) for holding the brushes (26) and preferably additional components (30, 31; 32). In contrast to a full equipping, the brush arrangement has less than six brushes (26), which are arranged on the circumference of the commutator (24) at an angular distance of approximately 60° to each other. Thus, the ripple of the rotor current, the torque oscillations, and the noise emission are clearly reduced and free space is created on the brush carrier for accommodating suppressor components (30, 31; 32).

Abstract: A cooling module includes a shroud (38) having an integral cover (42). The cover receives a bearing structure (40). A fan (36) is provided for moving air. A rotor and stator assembly (30) has an opened end and includes a stator (29) having permanent magnets. A rotor (31) includes a lamination stack (16), windings (21), a commutator (20); and a shaft (18). The rotor is associated with the stator so as to rotate with respect thereto. One end (34) of the shaft is coupled with the fan and another end (39) of the shaft is received by the bearing structure. A brush and connector unit (52) is associated with the cover of the shroud and includes brushes (58) associated with the commutator, and an electrical connector (62). The cover covers the opened end of the rotor and stator assembly and covers at least a portion of a brush and connector unit.

Abstract: In a terminal of an electric motor, a branch projects from a terminal connection on a side opposite from an extension. A projecting end side of the branch extends in an installation direction of the terminal, which is a direction for installing the terminal to a housing. The terminal is tiltable about a portion of the extension, which serves as a fulcrum, to cause abutment of the branch against a wall surface of the housing when the terminal connection receives a force in a direction opposite from the installation direction.

Abstract: A drive unit (10) for an adjuster in a vehicle, in particular for a vehicle seat, has at least one motor (12) which has a stator (16) with at least one coil (24). At least one rotor (18) which interacts with the stator (16) in a magnetic manner, rotates about an axis (A) and is fitted with permanent magnets. A commutation module (20) is provided for supplying current to the coil (24) as a function of the rotation of the rotor (18). An electrical connection (22) is provided for an at least two-pole supply voltage (+Ub, ?Ub). The commutation module (20) is selected from a set of brush-commutating and brushless commutation modules (20), with the structure of the motor (12) otherwise remaining the same.

Abstract: A brush holder includes a base member and a retaining member mounted on the base member. The retaining member includes a first brush retaining portion and a first coil retaining portion. A first choke coil is electrically connected to a first brush. The first choke coil includes a first coil terminal extending to the outside of the first coil retaining portion. The base member includes a connector portion, a first conductive member, and a first coil terminal support portion. The first conductive member extends from the connector portion and is electrically connected to the first coil terminal at a first connecting portion. The first coil terminal support portion supports the first coil terminal between the first connecting portion and the first coil retaining portion.

Abstract: A gear housing accommodates a worm shaft. A brush holder includes a base member and a retaining member loosely fitted to the base member. The base member is located between the gear housing and the retaining member. The retaining member retains a first brush and a second brush. The retaining member has a pair of positioning poles, and the gear housing has a pair of positioning projections. The positioning poles and the positioning projections are engaged with each other so as to prevent the retaining member from being moved in a direction perpendicular to the axial direction of the rotary shaft.

Abstract: Various embodiments provide a rotating electrical machine (10) that includes an electrical supply coupled to a stator (13), a rotor (12), and a plurality of roller elements (or brushes) (15) for transferring electrical current from the stator (13) to the rotor (12). In one embodiment, each roller element (15) is compressed between the rotor (12) and the stator (13) so that outward forces resulting from expansive properties of each roller element (15) urge the roller element (15) into contact and maintain the roller element (15) in contact with the rotor (12) and the stator (13). For example, in one embodiment, each roller element (105) has a hollow, substantially cylindrical body formed of a conductive material that is elastically biased in a radially outward direction to maintain contact with the rotor (12) and the stator (13).

Abstract: A dynamoelectric machine grommet including, a body portion of the grommet sealably engagable with an opening in a housing of a dynamoelectric machine, and at least one projection extending from the body portion and receptive to a conductor and providing electrical insulation thereto.

Abstract: An engine cooling module includes a shroud structure 12 having a shroud hub 46 constructed and arranged to receive a portion of a motor 16. A DC electric motor 16 has first and second ends and a rotatable shaft 40. The second end of the motor is received by the shroud hub. A fan 70 is provided that has a fan hub 72. The fan is coupled with the shaft for rotation therewith. The shroud hub 46 defines a protective cover covering the second end of the motor, and the fan hub 70 defines a protective cover covering the first end of the motor. Thus, no motor housing is required.

Abstract: An electric motor assembly device includes a carrier member with a central passage that receives a rotor shaft with a commutator. Brushes secured onto flexible, brush holders urge the brushes towards the central passage into a contact position with the commutator. The carrier member has mechanical elements for restraining the brush holders in an assembly position for assembly where the brushes clear the central passage and are protected against impact by the carrier member. This arrangement allows the rotor shaft to be introduced into the central passage of the carrier member without a risk of damaging the brushes. The brush holders are easily released automatically from the mechanical elements on the electric motor assembly device to bring the brushes into the contact position.

Abstract: The present invention provides several improvements in a slip ring (36) that is adapted to provide electrical contact between a rotor (42) and stator (40). In one aspect, a brush tube (39) is crimped around the upper marginal end portions of a plurality of individual fibers (38) inserted therein. In another aspect, a collimator tube (41) extends downwardly beyond the end of the brush tube to limit lateral movement of the fibers in the bundle when the rotor rotates. In yet another arrangement, a spring (55, 56) is arranged to bear against a current-carrying conductor to adjustably vary the force by which the lower ends of the fibers are urged to move toward the rotor.

Abstract: An axial gap between an annular projection of a rotor hub of a rotary unit and a sliding seal is set to be smaller than an axial gap between an axially upper face of a shaft and a cover of the rotor hub and an axially gap between an axially lower end face of a sleeve and an axially upper face of a radially-extending part of a bush. Thus, only the annular projection and the sliding seal come into contact with each other, even if the rotary unit moves downward in the axial direction.

Abstract: An electric motor, in particular a motor and gear box unit for activating functional equipment in a vehicle, includes a rotor shaft carrying a commutator co-operating with conductive brushes disposed in brush supports fixed to a printed circuit card; the motor is provided with means for enabling brush supports to be fixed to the printed circuit card solely by surface mounting. These means may comprise, for each brush, a metal casing containing the brush and having one wall with at least one transverse tab adapted to pass through the printed circuit card in order to position and hold the casing on the card and in order to provide an electrical connection. The invention enables brush-support devices to be fixed to the printed circuit card solely by surface mounting, thus making it pointless to perform an additional flow soldering operation as is required in the prior art.

Abstract: A wire feeder for an electric arc welder comprising a set of feed rolls driven by a DC motor with a commutator, first and second opposite polarity leads receiving power to drive the motor, and having a first brush at a given position on the commutator and connected to the first lead, a second brush circumferentially spaced from the first brush a first annular distance around the commutator and connectable to the second lead to cause the motor to rotate at a first speed to drive the rolls at a first speed, a third brush circumferentially spaced from the first brush a second annular distance around the commutator and connectable to the second lead to cause the motor to rotate at a second speed to drive the rolls at a second speed, and a switching circuit with an operative condition to connect the second lead to a selected one of the second and third brushes.

Abstract: The present invention provides several improvements in a slip ring (36) that is adapted to provide electrical contact between a rotor (42) and stator (40). In one aspect, a brush tube (39) is crimped around the upper marginal end portions of a plurality of individual fibers (38) inserted therein. In another aspect, a collimator tube (41) extends downwardly beyond the end of the brush tube to limit lateral movement of the fibers in the bundle when the rotor rotates. In yet another arrangement, a spring (55, 56) is arranged to bear against a current-carrying conductor to adjustably vary the force by which the lower ends of the fibers are urged to move toward the rotor.

Abstract: Devices and methods of use for brush holders are disclosed. A brush holder including an over-center locking device is disclosed. Also illustrated are methods and devices for maintaining brush pressure against a moving conductive surface using a spring without a back plate. Methods and devices for routing current from a brush to an output location without conducting through a brush box are shown. A system for ready removal and replacement of brushes, contacts and springs is disclosed. Also included are mechanisms and methods for preventing a brush from falling downward or out during removal of the brush. Methods and devices for cutting off current flow without creating arcing or shorting between a brush and collector ring or other moving conductive surface are presented as well.

Abstract: A brush holding plate includes cartridges and brushes, which are guided into the cartridges. The brushes are guided in a spring-loaded manner in the radial direction towards a central opening in the brush holding plate. The cartridges are arranged on the brush holding plate in such a way that they can be displaced from a radially outer pre-assembly position into a radially inner end assembly position.

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: A homopolar machine produces an axial counter force on the rotating shaft to compensate for the load on the shaft's thrust bearing to reduce wear and noise and prolong bearing life. The counter force is produced through magnetic interaction between the shaft and the machine's field coils and is created by changing the current excitation of the field coils, which results in a magnetic flux asymmetry in an inner flux return coupled to the shaft. The homopolar machine may also have a configuration that uses current collectors that maintain substantially constant contact pressure in the presence of high magnetic fields to improve current collector performance. The current collectors are flexible and may be made from either electrically conductive fibers or stacked strips such that they bear up against the armature so that the pressure is maintained by the spring constant of the current collector material.

Abstract: A motor vehicle has road wheels driven by a direct current motor that has a brush installed therein. A system for detecting abrasion of the brush comprises a clutch arranged between the road wheel and the direct current motor. The clutch is of a wet type so that in ON condition thereof, drive and driven members thereof are engaged with each other causing transmission of a torque of the motor to the road wheel and in OFF condition thereof, the drive and driven members thereof are disengaged from each other permitting a certain but small transmission of a torque of the road wheels toward the motor due to a viscosity possessed by oil in the clutch. A rotation speed sensor is provided that detects a rotation speed of the motor. A control unit is provided that issues a brush abrasion representing signal based on the rotation speed of the motor detected under OFF condition of the clutch.

Abstract: A choke 20 is provided for suppressing radio-frequency interference of a brush-type motor. The choke includes a single wire having a portion wound about a coil axis A to define a plurality of coils 24 including two outermost coils 26 and 28. An attaching structure 30 extends from one of the outermost coils and includes a loop structure 42. The loop structure is constructed and arranged to be inserted into a slot 58 in a brush card 48 and moved into hooked relation with a retaining member 60 of the brush card that is associated with the slot so as secure the choke to the brush card. At least a portion of the attaching structure is constructed and arranged to be in electrical connection with a brush 56 of a motor when the choke is secured to the brush card. An elongated end portion 44 of the choke extends directly from the other of the outermost coils.

Abstract: A bypass motor fan assembly having an integral vent cover retention clip includes a motor assembly having a motor bracket which carries at least a pair of motor brushes. A vent cover is coupled to the motor assembly and is retained by the clip. The integral clip is secured to the motor bracket for slidably retaining a motor brush and for retaining the vent cover to the motor bracket. The vent cover includes a pair of brush caps having a ledge and a downwardly extending rim. The integral clip includes a deflectable finger which is engaged by the ledge. The integral clip further includes a brush clamp having a top member, wherein the deflectable finger extends from the top member. The deflectable finger has a deflection section, wherein the rim initially engages the deflection section and the deflection section engages the ledge after the rim clears the deflection section. A method for assembling the vent cover to the motor assembly using the clip is also disclosed.

Abstract: A cover plate for an electric motor which has a brush array and interference suppression devices has additional electronic components mounted directly on the cover to determine the speed of the electric motor and for diagnosis. Contact with the interference suppression devices and the additional electronic components is achieved through electrical conductors which are located directly on the cover plate. Flexible use of the electric motor is ensured through the high temperature stability of the cover plate.

Abstract: A brush holder 10 is provided for holding a hammer brush 12 of an electric motor. The brush holder includes a single piece of wire bent to define a brush-engaging portion 14 define an opening 15, and a torsion spring structure 16 connected to and spaced from the brush-engaging portion. The brush-engaging portion is constructed and arranged to prevent rotation of the hammer brush when coupled therewith.

Abstract: In an electric drive unit according to the prior art, a signal receiver, which is disposed on a printed circuit board in an electronics housing, must be brought close to the signal transmitter, which is costly.

Abstract: The present invention is directed to an electrical slip ring assembly having a plurality of conductive rings held in place by multiple spaced apart comb-like structures advantageously eliminates the need for molding the conductive rings as part of the base or plating the conductive rings into completed bases. Further, the present invention eliminates the need to machine an annular base or perform expensive and time consuming operations to roll conductive strips into a machined base member.

Abstract: An electric machine having a rotor carrying a field coil has a fan and slip ring assembly. The slip ring assembly is axially remote from the fan portion, the slip ring assembly being electrically connected to the field coil. The point of connection between the slip ring assembly and the field coil is secured to the fan by a thermoplastic retaining member that is ultrasonically welded to the surface of the fan.

Abstract: A homopolar machine produces an axial counterforce on the rotating shaft to compensate for the load on the shaft's thrust bearing to reduce wear and noise and prolong bearing life. The counterforce is produced through magnetic interaction between the shaft and the machine's field coils and is created by changing the current excitation of the field coils, which results in a magnetic flux asymmetry in an inner flux return coupled to the shaft. The homopolar machine may also have a configuration that uses current collectors that maintain substantially constant contact pressure in the presence of high magnetic fields to improve current collector performance. The current collectors are flexible and may be made from either electrically conductive fibers or stacked strips such that they bear up against the armature so that the pressure is maintained by the spring constant of the current collector material.

Abstract: A choke 10, for suppressing radio-frequency interference of a brush-type motor, includes a single wire having a portion 15 wound about a coil axis A to define a plurality of coils 14 including two outermost coils 16 and 18. An attaching structure 20 extends from each outermost coil and is disposed generally transverse with respect to the coil axis. Each attaching structure is constructed and arranged to be inserted through an associated opening in a supporting structure and to be bent so as secure the choke to the supporting structure. An elongated end portion 22 extends from each attaching structure so as to be spaced from and generally parallel to the coil axis. The elongated end portions extend in opposite directions. One of the elongated end portions is constructed and arranged to be directly electrically connected to an electrical connector of a motor and the other of the elongated end portions is constructed and arranged to be in electrical connection with a brush of the motor.