An object of the present invention is to provide a structure capable of stably removing noise. A DC motor includes: a brush in sliding contact with a commutator; a brush holder base holding the brush; a flexible wiring connected to the brush; and a choke coil connected to the brush via the wiring, wherein the brush holder base has a clamping portion restraining the wiring to extend along a direction parallel to a direction of a magnetic flux generated in the choke coil.

A shunt extends from a brush received by a brush box of a brush holder. The first end of the shunt can be connected to the brush, and the second end of the shunt can connect to the brush holder. A lever connects to a back plate of the brush holder, and the lever may reversibly and selectively rotate between a first position and a second position; the lever can have a distal portion, and the second position of the lever secures a portion of the shunt between the distal portion of the lever and another component of the brush holder. The secured portion of the shunt can restrict downward movement of the brush in the brush box, while a spring pushes downward on the brush in the brush in the brush box, to thereby fixedly position the brush in the brush box.

A carbon brush for transferring high currents having a connective piece for connecting an electric conductor and a consumable contact piece having a contact surface formed for abutting against a commutator element. The connective piece has a silver content of approximately 5% by weight to approximately 39% by weight and the contact piece has a silver content of approximately 40% by weight to 100% by weight.

A brush holder for holding at least two brushes for a sliding contact arrangement, comprising an intermediate element and two contact elements for electrically contacting at least one of the brushes, the contact elements being arranged on two opposite sides of the intermediate element and the intermediate element having a receptacle extending through the opposite sides for a rotating shaft.

In an electric motor, a brush holder stay (33) has an opening section through which a commutator (23) is able to be inserted in a rotary shaft direction (O1), brush holders (41) extend in the rotary shaft direction (O1) and are formed in a flat spring shape biased toward the inside in a radial direction, base end sections of the brush holders (41) are supported by the brush holder stay (33) at intervals in a circumferential direction around the rotary shaft (3), and brushes (31) are held by the front end sections of the brush holders (41).

A brush block assembly and a method of assembling the same are described. The brush block assembly includes two or more brushes arranged in one or more rows, each of the two or more brushes comprised of a pressed electrically conductive material with an integral lead wire and a terminal, and one or more terminal studs, each of the two or more brush blocks within a same one of the one or more rows being separated by one of the one or more terminal studs, a helical spring coupled respectively to each of the two or more brushes, and insulated wires from a power supply and the respective terminal of each of the two or more brushes within the same one of the one or more rows being retained by the one of the one or more terminal studs in the one of the one or more rows.

A brush assembly includes a brush holder, a brush, an elastic element, and a conductive terminal. The brush slidably is accommodated in the brush holder. The elastic element is resisted between the brush and the brush holder. And the conductive terminal is formed by bending from the brush holder.

A brush assembly for use in a brush holder assembly of an electrical machine is disclosed. The brush assembly includes a carbon brush, an electrically conductive terminal and an electrically conductive lead assembly attached to both the carbon brush and the electrically conductive terminal. In some instances, the electrically conductive lead assembly includes a spliced union located between the electrically conductive terminal and the carbon brush and spaced away from both the electrically conductive terminal and the carbon brush. In some instances, the electrically conductive terminal includes an inner core layer positioned between a first conductive metal layer and a second conductive metal layer.

Provided is a brush assembly for transferring lightning current between a first structure and a second structure, which brush assembly includes a holder realized for mounting to one of the two structures; a recess formed in the holder, which recess is shaped to accommodate a brush and to expose a first brush face; and a first displacement means arranged to move the first exposed brush face against a surface of the first structure; and wherein the recess is shaped to also expose a second brush face, and the brush assembly further includes a second displacement means arranged to move the second exposed brush face against a surface of the second structure. Further provided is a lightning protection circuit of a wind turbine; and a wind turbine.

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.