Abstract: A mobile omnidirectional device having a base support, four wheels pivotally connected to the base support, each wheel being driven by a drive motor, a controller for individually controlling each of the drive motors, and a power source for powering the controller and the drive motors. The device provides a zero inch turning radius and can be configured as a jib hoist or a rolling transportation cart.

Abstract: An arrangement structure of a wheel drive system comprising a tire wheel and a drive unit for driving the tire wheel, wherein the tire wheel includes a brake part arranged to a hollow space of the tire wheel, the drive unit includes a motor and an inverter for driving the motor, the inverter includes a power module for supplying power to the motor and a bus bar for supplying power supplied from outside the tire wheel to the power module, and the bus bar is arranged to the brake part side than the power module.

Abstract: The invention relates mainly to a starter for a heat engine of a motor vehicle comprising: at least one electromagnetic contactor comprising a positive output terminal, at least one electric motor, the electric motor comprising: at least one brush cage (43), at least one positive brush (35) mounted in the brush cage (43), an electrical path (91) between the positive brush (35) and the positive output terminal (32), and at least one thermal protection (96) situated in the electrical path (91), in which the thermal protection is suitable for disconnecting the two elements (93, 95) when the thermal protection has a temperature above a temperature threshold to electrically disconnect the positive output terminal relative to the positive brush (35).

Abstract: A brush direct current motor has a stator with a plurality of coils that correspond to N phases, a rotor with 2P magnet poles and a current converting device for converting direct current power to N phases current and carrying the N phases of alternating current for the coils of the stator. The current converting device has a plurality of first and second bars alternately arranged with transiting plates along a brush path. Resistors connect the transiting plates to one of the adjacent bars.

Abstract: An electric motor includes a yoke having a plurality of magnetic poles, a rotary shaft, an armature core (8) attached to the rotary shaft, the armature core (8) having a plurality of teeth (12) and slots (13), an armature coil (9) wound on the teeth (12) through an intensive winding method, a commutator having a plurality of segments (15) installed at the rotary shaft and disposed in a circumferential direction, a low speed brush (21a) and a high speed brush (21b) configured to supply power to the armature coil (9) via the segments (15), and a common brush (21c) commonly used in these brushes, wherein, when n is a natural number of 3 or more, a ratio of the numbers of magnetic poles, slots (13), and segments (15) is set to 2:3:3n.

Abstract: A direct current motor controlling apparatus may include a direct current motor driving unit to apply a driving voltage to a direct current motor and detect a predetermined signal from the direct current motor, and a servo-micom to control the status of the direct current motor using the signal detected by the direct current motor driving unit. Accordingly, the rotational status of the direct current motor is checked to control the direct current motor.

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: 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: A slide surface of each segment defines a plane orthogonal to an axial direction of a direct current motor. A power supply brush is pressed against and contacted with the slide surface. The power supply brush includes a main brush and a sub-brush. The sub- brush has electrical resistance that is higher than that of the main brush. At least the main brush supplies an armature with power. The sub-brush is arranged more inward in the radial direction of the commutator than the main brush.

Abstract: The present invention relates to the field of electric-motor-driven vehicles such as cars, motorcycles, scooters, electric-motor trains, etc. Embodiments of the invention seek to provide an economic all-wheel-drive (AWD) vehicle possessing high dynamic characteristics and a relatively simple scheme of control over the operation of electric motors. An AWD vehicle according to the disclosed invention contains at least two gearless (direct-drive) electric motors, an electric power supply source, and an electric motor power supply control unit. At least one of said motors is a start-up (barring) motor and at least one is a cruise (propulsion) motor.

Abstract: A slide surface of each segment defines a plane orthogonal to an axial direction of a direct current motor. A power supply brush is pressed against and contacted with the slide surface. The power supply brush includes a main brush and a sub-brush. The sub-brush has electrical resistance that is higher than that of the main brush. At least the main brush supplies an armature with power. The sub-brush is arranged more inward in the radial direction of the commutator than the main brush.

Abstract: The invention relates to electric motors, particularly to low-voltage gearless commutator motors, and can be used as motor-wheels in transportation vehicles and in other technologies. The aim of the present invention is to provide an electric motor with increased performance characteristics, relatively simple design, and high reliability.

Abstract: A two-stage eutectic metal brush assembly having a slip ring rigidly coupled to a shaft, the slip ring being electrically coupled to first voltage polarity. At least one brush is rigidly coupled to a second ring and slidingly engaged to the slip ring. Eutectic metal at least partially fills an annulus between the second ring and a stationary ring. At least one conductor is rigidly coupled to the stationary ring and electrically coupled to a second voltage polarity. Electrical continuity is maintained between the first voltage polarity and the second voltage polarity. Periodic rotational motion is present between the stationary ring and the second ring. Periodic rotational motion is also present between the brush and the slip ring.

Abstract: A permanent magnet D.C. electric motor includes a stator housing, permanent magnet structure, and an armature assembly. The armature assembly includes a shaft rotatably mounted in the stator housing, lamination structure, first and second coil windings associated with the lamination structure, a first commutator electrically connected with the first coil windings, and second commutator electrically connected with the second coil windings, each of the first and second commutators being generally cylindrical and having a plurality of commutator segments. Certain segments of the first commutator and certain segments of the second commutator are electrically connected. The motor also includes a brush card assembly including a high speed side having first brush structure associated with the first commutator, and a low speed side having a second brush structure associated with the second commutator, and switches for selectively connecting a D.C.

Abstract: A motor system includes four brushes electrically connected to a rotor. A stator includes two magnetic poles. A circuit selectively rotates the rotor at a first speed by applying a first voltage to a first of the brushes and a second voltage to a second of the brushes. The circuit selectively rotates the rotor at a second speed by applying the first voltage to the first brush or the second brush, and applying the second voltage to a third of the brushes and/or a fourth of the brushes.

Abstract: A universal motor having two carbon brushes (2a, 2b) and two series connected field coils (4a, 4b). The universal motor having an interference suppressing capacitor (5) with a first terminal (6a) connected directly to the first carbon brush (2a) and connected with a field coil (4a) in a conducting manner. The interference suppressing capacitor (5) also including a second terminal (6b) connected directly to the second carbon brush (2b) and connected to a power line (8b) in a conducting manner.

Abstract: An electric motor includes a stator which carries permanent magnets, and a rotor which carries electromagnets. A particular arrangement of connecting up the windings of the electromagnets to the distributing collector and the selection of the ratio of stator magnets to rotor electromagnets enable higher torque to be achieved. The main field of application is in motor-wheels of vehicles.

Abstract: An assembly for transferring current comprises at least one electrically conductive slip ring; at least one electrically conductive brush for supplying current to the at least one slip ring; and an electric or pressure actuator driven vibration source for changing the position of the brush with respect to the slip ring. If desired, brush current can shared by using inductance variations or by selective coupling of rotor windings to the slip rings.

Abstract: The present invention relates to a device in an electronic driving dynamics control system, comprising an electromechanic transducer, especially an electric motor, a hydraulic pump, and an electric actuating unit for the transducer, said transducer including a magnetic or magnetizable stator and a rotor, as well as connections for connecting the actuating unit, and a commutation device for the actuation of electromagnetic windings of the rotor, said invention inhering the special feature that the commutation device comprises three or more commutating elements that are electrically connected to the respective connections so that the windings of the rotor can be actuated individually by the actuating unit, with at least one commutating element being connected to a change-over element that provides for an additional connection for connecting a rotational speed measurement devices.

Abstract: The invention relates to a sliding contact device for transmitting electrical signals or power between at least two units located opposite one another, whereby at least one unit comprises sideways, which are arranged along the trajectory of motion and which are made of electrically conductive material, and a second unit comprises sliding contacts that are in electrical contact with said sideways of the first unit. The invention is characterized in that, in the second unit, several carbon holders are arranged on a supporting plate with conductor tracks for contacting the carbon.

Abstract: An electricity generator is disclosed having electrically conductive, counter-rotating collectors arranged coaxially with a magnetic field extending radially from an axis of rotation. The collectors intersect the radial magnetic field perpendicularly and are electrically connected to each other to conduct current flow in opposite directions to balance the interaction between current flow in the collectors and the magnetic field.

Abstract: An electrical wind generator system using multiple brushes for converting the kinetic energy of the wind into electrical energy. The electrical generator system includes a support frame assembly designed for coupling to a vertical support, a generating assembly coupled to the support frame assembly and designed for converting rotational motion into electrical energy, a pair of blade assemblies designed for converting kinetic energy of wind into rotational energy, each one of the blade assemblies being coupled to the generating assembly.

Abstract: An assembly for transferring current comprises at least one electrically conductive slip ring; at least one electrically conductive brush for supplying current to the at least one slip ring; and an electric or pressure actuator driven vibration source for changing the position of the brush with respect to the slip ring. If desired, brush current can shared by using inductance variations or by selective coupling of rotor windings to the slip rings.

Abstract: An assembly for transferring current comprises at least one electrically conductive slip ring; at least one electrically conductive brush for supplying current to the at least one slip ring; and an electric or pressure actuator driven vibration source for changing the position of the brush with respect to the slip ring. If desired, brush current can shared by using inductance variations or by selective coupling of rotor windings to the slip rings.

Abstract: An electric motor in which polarities of a stator and the number of polarities thereof are converted by converting the polarity of current depending on a rotation position of a rotor made of a permanent magnet so as to enhance attraction and repulsion occurring between the rotor and the stator, so that a rotative force of the rotor can be achieved with minimum power.

Abstract: In a starter, a power supply terminal connected to a solenoid coil of a magnet switch and connectable to a starter external circuit is provided on an end cover. The power supply terminal includes a terminal metal member, a bimetal which interrupts electric conduction between the solenoid coil and the terminal metal member at the time of temperature rise above a predetermined temperature, and a casing contacting a foot part of the terminal metal member and encasing the bimetal therein. The bimetal responds to each of the excessive heating of the terminal metal member and excessive energization current to interrupt the conduction. In case of a single axis-type starter, the power supply terminal is provided on a recess so that the terminal metal member does not extend axially beyond the rear end face of the end cover.

Abstract: A dc motor wherein a driving force thereof can be used effectively with a simple and compact mechanical construction and a motor controlling system which can control such a dc motor to be driven efficiently. The motor comprises at least two coils, and change-over means for changing electric connection of the coils to change over the motor, when power is selectively supplied to the coils, between a first mode in which the torque produced is relatively high and the rotational frequency is relatively low and a second mode in which the torque is relatively low and the rotational frequency is relatively high. The motor controlling system includes selecting means for automatically selecting one of the first and second modes to control the change-over means in response to a given condition of the motor.

Abstract: A brush system for providing an electric connection to a rotating commutator wheel of an electric machine is disclosed. The brush system has a switched brush selectively switchable between an engaged position and a disengaged position and a switch connected to the switched brush and formed of a shape-memory-alloy. The switch attains an extended state at a first temperature and attaining a retracted state at a second temperature, for switching the switched brush alternately to the respective engaged position and the respective disengaged position. The switch includes a temperature conditioner for varying a temperature at the switch between the first temperature and the second temperature. The temperature condition may be an electric network wherein the internal resistance of the switch allows for heating of the switch to the second temperature.

Abstract: A multi-speed, direct current motor (120) incorporates a high speed (24) brush disposed between the low speed (22) and the common ground (26) brushes and having a non-arcuate end face (25) which, unlike the conventional arcuate brush end face (23,27), is not subject to speed-drift erosion. The non-arcuate end face (25) is configured of two offset surfaces (55,65 & 57,67) which intersect to provide a line of contact (43) between the end face (25) of the high speed brush (24) and the commutator (40) which is displaced from the center line of the high speed brush (24) in a direction counter to the direction of rotation of the motor, that is toward the leading edge (21) of the brush (24). The intersecting surfaces (55,65 & 57,67) may comprise either flat planar surfaces or contoured surfaces.

Abstract: A single speed, two pole permanent magnet motor has compact brush card assembly mounted within the volume form by a plurality of ring shaped laminations forming the armature to allow the height of the motor to much less than a standard motor. In addition, there is shown a two speed, four pole permanent magnet motor having a height much less than a standard two speed motor. In each motor there are electrically connected to the supply lines a choke means and across each supply line is a capacitor for suppressing radio frequency interference.

Abstract: The invention provides a method of commutation control, for changing the speed of a direct current electric motor of the constant flux type, having an encapsulated inductive winding with n poles, each of which is supplied by a separate brush. In this method, a speed at a level i, where i is in the range 1 to n-1 inclusive, is obtained by connecting a group of i+1 brushes to the terminal of the direct current supply source. The state of connection of the brushes is modified in accordance with a control characteristic which comprises modifying the composition of the group of i+1 brushes to be connected in order to obtain a motor speed at a predetermined level i, and/or by interrupting the connection of one of two consecutive brushes to the brush previously connected during a speed changing operation.

Abstract: A brush and slip ring apparatus for an alternating current generator. A brush assembly is secured to a rotor shaft of the generator to rotate therewith. The brush assembly includes two axially spaced brushes that are pivoted to a brush support that is secured to the shaft. When the shaft is rotated, the brushes move outwardly away from the shaft due to centrifugal force. The brushes respectively engage two axially spaced fixed slip rings that surround the brush assembly. The brushes are maintained engaged with the slip rings due to centrifugal forces developed by the pivotally mounted brushes. The brushes are connected to a field coil of the rotor of the generator.

Abstract: An independent-drive wheel for electric cars, bicycles, and wheelchairs wherein electromagnets 14,15 of rotor 12 of a commutator motor are positioned along a circumference in the form of a pair of groups which are offset with respect to each other, and wherein distribution commutator 6 of stator 9 electrically connected to electric energy storage device 32 is constructed in such a manner that when magnetic axes 17,18 of electromagnets of one group and magnetic members 11 of the stator are aligned, electromagnets 14 are connected to electric energy storage device 32, and when magnetic axes 19,18 of electromagnets 15 of the second group and of respective magnetic members 11 of stator 9 are not aligned, these electromagnets 15 are connected to voltage control unit 36.

Abstract: This invention relates to a speed changing device, giving at least two motor speeds, for an electric motor supplied with direct current. It is applicable to motorized ventilating fan units designed for the air cooling of heat engines, mainly for automobiles.The speed changing device is characterized in that it includes a contactor having at least two positions whereby, in the first position of the contactor, not more than three of the brushes are supplied with electrical current so as to obtain a first motor speed (low speed), while in the second position of the contactor, all of the brushes are supplied with electrical current so as to obtain the greater motor speed (high speed).

Abstract: Apparatus for providing selectively from time to time in the same member 11 either rotary motion 12 about an axis 13 or linear movement 14 in an axial direction from one position to another comprises: an electric motor 15 including a stator 16 comprising a housing 17 and a magnet 18 for providing a first magnetic field therein; a rotor 19 comprising an armature 20, for providing a second magnetic field, on a shaft 11; all of the above being coaxial about the axis 13; and a commutator 21 (mechanical or electronic) and associated circuitry 22 for conducting electrical energy to the motor 15 to provide, selectively, rotation 12 of the shaft 11 in a selected direction (clockwise or counterclockwise) and/or axial translation 14 of the shaft 11 in a selected direction (toward or away from the first magnetic field). For rotation, the magnetic fields are substantially perpendicular; for translation, they are substantially parallel.

Abstract: A drive mechanism for windshield wiper systems on motor vehicles comprises a d.c. motor to be driven in at least two different speeds of operation. The motor includes a collector, a first and a second carbon brush substantially resting against the collector diametrically opposite each other, and a third carbon brush which rests against the collector between the first and the second carbon brush. The third carbon brush is set off at a particular angle relative to the second carbon brush. When the d.c. motor is operated in the first speed of operation the first and the second carbon brush is connected to the voltage source and when the d.c. motor is operated in the second speed of operation the first and the third carbon brush is connected to a voltage source.

Abstract: The electric motor contemplated by this invention includes an armature having two opposed faces mounted on a shaft. The armature is mounted on the shaft intermediate of the ends of the shaft. A pair of commutators are mounted on the shaft adjacent to each of the opposed armature faces. Each of the commutators includes a plurality of commutator bars, each of which has its circumferential width offset relative to the circumferential width of the commutator bars on the other commutator. Alternately or in combinatrion, with the commutator bar offset the brushes in operative engagement with each of the commutators are arranged with their circumferential width offset, relative to the circumferential width of the brushes in operative engagement with the opposite commutator. The electric motor can also be provided with a redundancy capability by a circuit arrangement in which one of the commutators is held as a backup in the event of a failure of the windings of the other commutator.

Abstract: A solenoidal homopolar dynamoelectric machine is provided with inner and outer field coils positioned on opposite sides of a current collecting zone of a rotor which is mounted for rotation with respect to a stator structure. An additional field shaping coil or a tilted brush box current collector is used to conduct current in a circumferential direction near the current collection zone of the rotor to reduce the radial components of magnetic flux in the current collection zone. This reduces circulating currents in the brush assembly.

Abstract: An electrical machine comprising a stator having electrical windings and a permanent-magnet rotor which carries a shaft arranged for connection to a prime mover. The machine, when the shaft is driven by a prime mover, acts as an alternator to produce alternating electrical current. A commutator is provided on the shaft and electrical-current-transferring brushes are associated with the commutator. Means is electrically associated with the segments of the commutator and with the electrical windings on the stator so that, whe the brushes are connected to a source of direct electrical current, the machine acts as a motor and the shaft is caused to rotate for starting a prime mover connected to the shaft.

Abstract: Homopolar generators are provided with a helical field coil disposed around a rotor, wound coaxially with the rotor, and connected in series with sliding electrical contacts on the rotor. The coil of a single rotor machine includes two sections wound so as to increase magnetic flux through the rotor when current is allowed to flow through an external circuit and through the coil and brushes. For a dual counterrotating rotor machine, a single section coil is used to perform the same function.

Abstract: An electric work vehicle with a battery powered traction motor and pump motor is provided with an auxiliary power supply for a load circuit requiring voltage lower than that of the battery. The pump motor is provided with an auxiliary brush at a location between a pair of motor brushes and the auxiliary load circuit is connected between the auxiliary brush and one of the motor brushes. The auxiliary brush is positioned relative to the motor brush so that it supplies the voltage required by the auxiliary load circuit.

Abstract: An improved direct-current electrical dynamotor wherein the brushes are sufficiently wide to simultaneously abut a multiplicity of commutator segments. The winding sections extend independently from one commutator segment to a commutator segment that is approximately 180 electrical degrees away whereby the brushes each simultaneously collect a plurality of currents induced in the winding sections extending to the commutator segments abutted by the pair of positive and negative brushes. Each pair of brushes is installed on each side of the magnetic neutral. All of the coil sections are completely independent of each other with no electrical interconnections aside from the commutator brushes.

Abstract: A passive safety seat belt system for a vehicle includes a belt that is driven between a restraint position and a release position by a direct current electric motor having first and second brushes positioned diametrically opposite each other on the commutator. A third brush is positioned adjacent the second brush and contacts the commutator. When the first and second brushes are connected to a source of current to energize the motor, the motor produces a first torque output in a forward direction, and when the first and third brushes are connected with a source of current to energize the motor, the motor produces a second torque smaller than the first torque and in a reverse direction. The motor operates in the forward direction to drive the belt system from the release position to the restraint position in one time period, and operates in the reverse direction to drive the belt system from the restraint position to the release position in approximately the same time period.

Abstract: A switching circuit electrically connected to a brush and collector bar of a DC dynamoelectric machine utilizing a high current rectifier and a source of electromotive source which produces a current in the circuit which is generally equal to the current flowing between the brush and the collector bar and which can be forced to zero as the brush separates from the collector bar to reduce degradation of the trailing edges of the brushes and collector bars and improve the machine efficiency.

Abstract: An electric motor including a rotary armature and an annular field mounted for rotation around said armature and geared to said armature by way of planetary gearing fixed to the housing whereby the opposing torques of the field and the armature are summed at the motor output shaft. Such counter-rotating field arrangement provides for an increase in the flux cutting speed of the motor while, at the same time, maintaining the angular rate of the armature at a speed which is compatible with the containment of the centrifugal forces thereof. Both the armature and the field include concentric commutation rings at one end of the motor such that the field coils and the armature coils are excited at a predetermined phase angle by a plurality of field and armature brushes. Disposed along the field and armature brushes, and separated therefrom by at least one commutation segment are corresponding pick-up brushes which receive the collapsing field transient of the individual coils in both the armature and the field.

Abstract: In a direct current machine having plural brushes arranged for sliding engagement over the surface of the commutator assembly along separate paths; wherein the commutator assembly comprises a multiple number of commutator bars with each bar having a current transfer surface divided into conducting and nonconducting sections, each section being located in one of the separate paths, and with the sections of adjacent commutator bars so arranged to provide a checkerboard pattern of conducting and nonconducting sections over the commutator assembly surface. The brushes are interconnected to the machine load through a predetermined circuit network which controls the short circuit current.