Provided is a permanent magnet brush micromotor and an assembly method thereof. Its upper stator bracket and lower stator bracket are designed to fit together, and the concave parts of the upper stator bracket and lower stator bracket are matched to form a complete mounting cavity for mounting a motor shaft, core winding, bearings and commutator. The core winding, bearings and commutator are installed on the motor shaft to form a mover assembly, and then the mover assembly is installed in the concave part of the lower stator bracket. Finally, combining and fixing the upper stator bracket and lower stator bracket with electric brushes which are respectively placed in brush mounting positions. And, two bearings are fixed or pressed on the same component, so that the concentricity and coaxiality of the bearings can be ensured, the compression of the central biasing force is avoided during assembly.

An electric motor and a method for manufacturing an electric motor capable of improving rotation balance of an armature and realizing effective brake braking with a simple configuration are provided. In an electric motor including an armature core having a plurality of teeth and teeth within a yoke, a winding wound between the slots, and a commutator having and a plurality of segments to which the winding is connected, the winding has a main winding that applies a rotational force to the armature core and a brake winding that applies a braking force to the armature core, and an H bridge circuit is built between the winding and a power supply, and the main winding and the brake winding of the winding are disposed at positions for adjusting balance when the armature core rotates.

A bus bar engaged with each brush holder and electrically connected to positive brushes. A rotor has coils and protrusions extending in an outward direction and electrically connecting the coils to commutator segments. Each brush portion end surface faces the outward direction, the bus bar has an engagement portion with an end facing the inward direction, and the end of the engagement portion is further in the outward direction than the end surface portion. The brush has an end facing the first direction, the bus bar has an end facing a second direction, and the end of the bus bar is further in the second direction than the end of the brush facing the first direction. Each protrusion end faces the second direction, and the end of the bus bar facing the first direction is further in the second direction than the end of the protrusion facing the second direction.

A motor includes a commutator, a brush, a first spring, a second spring, and a holder. The brush is configured to come into contact with the commutator to be electrically connected to the commutator. The first spring is configured to push the brush along the first direction toward the commutator. The second spring pushes the brush along a second direction intersecting the first direction. The holder is disposed such that the brush is located between the holder and the second spring in the second direction. The holder holds the brush between the holder and the second spring.

A direct-current motor commutator structure includes: a commutator base, comprising a front pressing ring, a pressing plate and a sleeve that are sequentially abutted, a sealing ring being provided between the front pressing ring and the pressing plate, and between the pressing plate and the sleeve constituting a bearing area; a commutator, mounted in the bearing area and having opposite first and second portions; a sealing element being potted or provided between the second portion and the sleeve; an equalizing cable, mounted on an outer side of a first potting area formed by the first portion, the pressing plate and the front pressing ring, abutting against the first portion and the front pressing ring, and covering the first potting area; and an armature coil, clinging to the equalizing cable and located on an outer side of a second potting area formed by the equalizing cable and the front pressing ring.

An angle grinder includes a housing, an output shaft, and a motor. The motor includes a stator assembly, a rotor assembly including a motor shaft configured to rotate about a first axis, a commutator, and a carbon brush. The commutator includes a bushing, configured to connect the commutator to the motor shaft, a plurality of commutator segments, sequentially distributed in a circumferential direction around the first axis and arranged around the bushing, and an insulating member, configured to bond the bushing and the plurality of commutator segments so as to constitute a whole.

A rotating electrical machine includes a magnetic field generator, and an armature that includes a multi-phase armature winding. The magnetic field generator includes a tubular cylindrical magnet carrier having opposing first and second peripheral surfaces and arranged to be coaxial with a rotating shaft attached to the rotor. The first peripheral surface of the magnet carrier is closer to the armature than the second peripheral surface is. The magnetic field generator includes a tubular cylindrical magnet holder having opposing first and second peripheral surfaces. The first peripheral surface of the magnet holder is closer to the armature than the second peripheral surface is. The tubular cylindrical magnet holder is secured to the first peripheral surface of the magnet carrier, and the magnets are secured to the first peripheral surface of the magnet holder. The magnet holder has a stacked configuration stacked in an axial direction of the rotating shaft.

An electric machine (10), in particular for the adjustment of movable parts in the motor vehicle, includes a stator housing (22) which receives a stator (12) and a rotor (14), the rotor (14) having a rotor shaft (16), on which a commutator (18) is arranged and which can be energized by electric brushes (20), and the stator housing (22) having an axial opening (24), through which the rotor shaft (16) protrudes out of the stator housing (22), an electrically conducting shielding plate (29) being inserted axially between a brush holder plate (55) and a bearing plate (56) for the rotor shaft (16) in order to form a sandwich component (70), the sandwich component (70) extending transversely with respect to the rotor shaft (16) and covering substantially the entire opening (24).

An electric motor includes a cylindrical rotor with a plurality of wires parallel to the cylindrical axis nested between two cylinders of magnets in a stator. The cylinders of magnets may be a solid magnet, a plurality of bar magnets, a plurality of coils generating magnetic fields or other magnets or generated magnetic fields. A nested electric motor includes a first electric motor additionally including a first shaft, which first electric motor nests within the hollow center of a second larger electric motor additionally including a second shaft. The first shaft is coaxial with the second shaft.

Provided is a synchronous electrical machine that includes a stator and a wounded rotor, the stator having a plurality of phases, each phase comprising coils connected together and magnetic stator poles cores fixed on a stator frame and evenly distributed along a stator diameter, each coil being wounded around a different magnetic stator pole core to form a magnetic stator pole, each phase comprising a same number of magnetic stator poles, the magnetic stator poles of each phase being disposed in the stator frame to form a concentric winding stator. The rotor includes a plurality of magnetic rotor pole cores evenly distributed around the rotor and rotor coils, each rotor coil being wounded around a different magnetic rotor pole core to form a magnetic rotor pole.