282 results about "Commutator (electric)" patented technology

The invention discloses a generation device for generating DC triboelectricity, including a stator, a rotor, an outer casing, a conductive component, a V-shaped support, and a front end cap and a rear end cap. The generation device uses the phenomenon of electrification by friction to generate electricity. A stator friction piece on the inner wall of the outer casing and a rotor friction piece on the outer wall of the rotor are in tight contact and conduct rotational friction therebetween via the rotation of the rotor, and thus generating current. According to the invention, the two friction pieces maintain contact friction therebetween from beginning to end via the uniform circular motion so as to generate inductive charges, and electrons flow through an external circuit and constant direct current is output with the conductive component as a reverse commutator. The generation device is simple in structure and low in cost, and can directly and constantly supply electricity to electronic components without extra rectifying devices, and has excellent social and economic benefits.

The invention provides a permanent-magnet hybrid magnetic circuit drive motor of an electric vehicle, and belongs to the technical field of vehicle motor electric appliances. The permanent-magnet hybrid magnetic circuit drive motor of the electric vehicle is composed of a front end cover, a rear end cover, a motor case, a rotor and a stator. Tile permanent magnet steel is fixed to a rotor iron core through a screw via a pole shoe, and rectangular permanent magnet steel is embedded into the rotor iron core, so that a rotor magnetic bypass structure is achieved, the permanent magnet steel is effectively prevented from generating irreversible demagnetization under over-high temperature or under the armature reaction action of impact currents, and the permanent magnet steel does not lose magnetism. A rotor magnetic field of the drive motor is provided by a radial magnetic field and a tangential magnetic field together, the intensity of the magnetic field is large, the output power is high, no electro-magnetic winding is needed, power consumption is little, no carbon brush or mechanical commutator is provided, the failure rate is low, and the permanent-magnet hybrid magnetic circuit drive motor has the advantages of being high in efficiency, high in power density, compact in structure, reliable in working and the like.

An electric machine comprises: a casing (2); a stator (3) and a rotor (4) supported by the casing (2), the rotor (4) having at least one rotor winding (7); a commutator (9) connected permanently to the rotor (4) and electrically connected to the rotor winding (7); a pair of brushes (12), each having a first end (12a) maintained in a sliding position with the commutator (9) and electrically connected to respective terminals which may be connected to an electricity mains supply; a pair of brush holder elements (11) supported by the casing (2), each brush holder element (11) being associated with a respective brush (12) to keep it pressed on the commutator (9). Each brush holder element (11) has at least one lateral surface (18) to face a respective butting position (17) of the casing (2), and which may be joined to the butting portion (17) to transmit a thermal power to the butting portion. The lateral surface (18) of each brush holder element (11) is electrically isolated from the respective butting portion (17).

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. voltage in such a way as to cause the armature assembly to rotate at a first speed and a second speed.

The invention provides a silver-base rare-earth alloy material, which is characterized by comprising the following components in percentage by mass: 0.1 to 8 percent of Cu, 0.01 to 0.5 percent of Ni, 0.01 and 0.3 percent of Sm and the balance of Ag. By the silver-base rare-earth alloy material, the defect that the service life of the conventional silver-base composite material is reduced greatly due to unsuitability for high-temperature environment of a micro motor, the defect that materials are difficult to process due to substantial reduction of elongation of the materials caused by the addition of rare-earth elements in the silver-base composite material which is suitable for the micro motor and the like are overcome, so the invention provides a new silver-base rare-earth alloy material and a preparation method and application thereof. The silver-base rare-earth alloy material has the characteristics of high elongation, high recrystallization temperature, high hardness at high temperature, high abrasive resistance and the like, is suitable to be used as a sliding electric contact material, can be particularly used for manufacturing parts of a commutator of the micro motor and the like, and has the advantages of high quality and long service life at the high temperature of 70 DEG C.

A brush motor for an electric power steering system comprises a four-pole field portion 3, an armature 4 having windings 9 wound around a core 5 with 22 slots 8 to constitute a lap winding, hooks 12 which are formed on one ends of 22 commutator segments 10 respectively and on which the windings 9 are hooked, and a cylindrical commutator 7 constructed by molding integrally the commutator segments 10 with a resin, and four brushes 18 which contact slidably to outer peripheral surfaces of the commutator segments 10, wherein, when the commutator 7 to which a sliding contact portion of the brush 18 contacts is sectioned perpendicularly to an axial direction, a relationship of 0.18<=(AxN)/(DxD)<=0.23 is satisfied,where A is a sectional area of one commutator segment, N is a number of the commutator segments, and D is a diameter of outer peripheral surfaces of the commutator segments.

The invention provides a built-in permanent magnet steel hub driving motor of an electric vehicle and belongs to the technical field of automobile motor electric appliances. The built-in permanent magnet steel hub driving motor of the electric vehicle consists of a front end cover, a rear end cover, a hub casing, a rotor, a stator, a stator support and a shaft. Two pieces of completely-identical rectangular permanent magnet steel are respectively placed in two rectangular grooves forming a shape of a regular Chinese character 'ba' of a rotor iron core to form an N-pole, the other two pieces of completely-identical rectangular permanent magnet steel are respectively placed in a regular Chinese character 'ba' shaped groove formed by the other two adjacent rectangular grooves of the rotor iron core to form an S-pole, the rest can be done in the same manner to form the permanent magnet rotor with N-poles and S-poles arranged at intervals, the structure is a rotor magnetic bypass structure and can effectively prevent the permanent magnet steel from producing irreversible demagnetization under the armature reaction effect of impact current, and excitation loss of the permanent magnet steel is ensured. A rotor magnetic field of the hub driving motor is provided by the permanent magnet steel without electro-magnetic windings, electric energy consumption is low, carbon brushes and mechanical commutators are not adopted, and the failure rate is low.

The invention discloses a motor and a concrete vibrating rod using the same. The brush motor comprises a stator, a rotating shaft and a rotor fixed on the rotating shaft, wherein the rotating shaft is supported by a bearing; a commutator assembly and a corresponding electric brush assembly are arranged on the rotating shaft; the rear end of the motor supports the first bearing of the rotating shaft between the rotor and the commutator assembly to partition the rotor, the commutator assembly and the electric brush assembly in two difference spaces, so that the commutator assembly and the electric brush assembly are positioned in a space outside the first bearing. The invention also discloses a method for improving the working performance of the brush motor and the concrete vibrating rod using the brush motor. The space outside the first bearing is communicated with a pipeline-type cavity in a tail pipe system. The related technical indexes of the vibrating rod can be effectively met without any external equipment.

The invention discloses commutator size and appearance defect detection equipment based on CCD vision. The commutator size and appearance defect detection equipment comprises an electrical cabinet, a workbench and a hood, wherein a vibration feeding device is arranged on one side of the workbench, a rotary shifting mechanism connected with a discharging port of the vibration feeding device is arranged on one side of the top surface of the workbench, a glass rotating mechanism connected with a discharging port of the rotary shifting mechanism is arranged in the center of the top surface of the workbench, and a guide mechanism is arranged at the axis of the glass rotating mechanism; a first camera assembly, an optical fiber detection assembly, a second camera assembly, a third camera assembly, a fourth camera assembly, a fifth camera assembly, a sixth camera assembly and a discharging assembly which are located on the outer side of the glass rotating mechanism are sequentially arranged on the top surface of the workbench; and a display is arranged at the top of the outer side wall of the hood. According to the commutator size and appearance defect detection equipment, continuous automatic feeding, placement, positioning, all-dimensional detection and classified discharging of a commutator product to be detected can be realized, appearance detection is comprehensively covered, the detection result is accurate and reliable, and the detection efficiency is high.

The invention discloses an alkali metal-containing silver-copper-nickel sliding electrical contact material which is prepared by adding a small amount of alkali metal elements to AgCuNi and AgCuZnNi, wherein the additive amount (in mass by percentage) of alkali metal Li, Na and K is 0.01%-3.0%, the elements can be respectively and independently added, and two or three elements are added in a matching way , but the total additive amount of the elements can not be more than 3.0%. The alkali metal-containing silver-copper-nickel sliding electrical contact material has favorable self-lubricating performance and arc-extinguishing performance, and can improve the service life and the contact stability and reliability of direct-current motor commutators when used for making the direct-current motor commutators.

The invention discloses a mixed magnetic engine, which is provided with a mixed magnetic stator, a mixed magnetic rotor, a commutator, a controller and a casing; and the mixed magnetic rotor is arranged in the mixed magnetic stator, the mixed magnetic rotor is fixed on the casing (1) wrapping the mixed magnetic stator through two end caps, a rotor winding (6) disposed in the mixed magnetic rotor is connected with a stator winding (2) arranged in the mixed magnetic stator in parallel through the commutator and a carbon brush, and is electrically connected to the controller. The engine utilizes a permanent magnet composed of natural energy resources of natural magnetic ore, strong magnetic material, soft magnetic material and weak magnetic material with big potential, combines permanent magnetism and electromagnetism cleverly, and uses minimal electric energy to activate the mechanical energy for rotation, so the engine has advantages of simple structure, high efficiency, energy saving, safety and strong practicability, and can solve the environmental protection problem of the current power sources. The engine can be widely applied to various power devices in industrial, agricultural, traffic and national defense fields.

An electrical machine, in particular an electric motor, has a first number (k) of commutator laminates (10, 12, 14) and brushes (16, 18), wherein the commutator laminates (10, 12, 14) are arranged distributed uniformly in the circumferential direction of a circumference of a laminate support (24). The brushes (16, 18) are arranged such that commutation times are distributed as uniformly as possible in order to reduce current ripple when using a wave winding and a number of brushes (16, 18) which is less than a number of poles (2p) in the electrical machine.

A method for detecting a packed slot condition in a commutator of an electric motor comprising the steps of: (a) providing an electric motor having a commutator, the commutator having a plurality of segments separated from each other by a slot; (b) monitoring the current going through the electric motor; (c) determining if the current going through the electric motor being monitored in step (b) has changed from a preset value; and (d) providing a signal to indicate that the current going through the electric motor has changed to thereby detect for a packed slot in the commutator.

The invention relates to the technical field of motors, and provides a direct current motor with a constant voltage electric brush, wherein the direct current motor can guarantee stable pressure of the electric brush. The electric brush comprises a seat body fixedly arranged on an installation frame; a sliding hole extending in the length direction of the seat body is formed in the end face of theend, facing a commutator, of the seat body; a carbon brush matching the sliding hole is arranged in the outer end of the sliding hole; a driving block matching the sliding hole is further arranged inthe sliding hole; an electromagnet and a permanent magnet are arranged on the surface, opposite to a carbon brush, of the driving block; the electromagnet is opposite to the permanent magnet; and theelectromagnet and the permanent magnet repel each other in the power-on state. According to the invention, constant-voltage contact between the electric brush and the commutator can be guaranteed inthe true sense, the response speed is high, and control is flexible and convenient.

The invention relates to the technical field of motors. The invention aims to provide a motor with an improved commutator structure, which can improve the contact stability of a commutator and an electric brush. The commutator comprises an insulating mounting ring which sleeves a rotating shaft, and a plurality of pairs of fan-shaped conductive frames which are annularly and uniformly arranged onthe insulating mounting ring; the inner ends of the conductive frames are fixedly connected with the insulating mounting ring and the rotating shaft through insulating bolts; the area between the conductive frames is filled with insulating resin; and the outer end faces of the conductive frames and the outer surface of the insulating resin jointly form an annular contact face making contact with the electric brush. By filling the gaps of the commutator, the outer surface of the commutator integrally forms an annular contact surface. When the commutator is in contact with the electric brush, the abrasion between the commutator and the electric brush can be reduced. The service life of the electric brush is prolonged, and the contact stability of the electric brush is improved.