An interconnection device for an electric machine, in particular for an electric machine for a motor vehicle, is provided for interconnecting shaped-bar ends of a winding, in particular of a stator winding. The interconnection device has an interconnection element, which has one or more openings for the insertion of at least one shaped-bar end, wherein the one or more openings each have an insertion section and a contact-making section adjoining the insertion section, which sections are designed such that the at least one shaped-bar end can be inserted into the insertion section and, in the case of a relative movement between the opening and the inserted shaped-bar end, the inserted shaped-bar end reaches the contact-making section and the spacing between the at least one shaped-bar end and a contact is reduced by way of being guiding through the contact-making section.

Coupling for connecting a wind turbine to a power grid, the coupling comprising a first support having at least one first electrical connector and a second support having at least one second electrical connector that is complementary to the first electrical connector, the first support and the second support being rotatable with respect to one another, characterized in that at least one of the connectors is movable transversely to the plane of the supports relative to the other connector in order to form and disconnect an electrical plug connection and the connectors are sealed against the penetration of moisture both when they are interconnected and when they are separated.

Coupling for connecting a wind turbine to a power grid, the coupling comprising a first support having at least one first electrical connector and a second support having at least one second electrical connector that is complementary to the first electrical connector, the first support and the second support being rotatable with respect to one another, characterized in that at least one of the connectors is movable transversely to the plane of the supports relative to the other connector in order to form and disconnect an electrical plug connection and the connectors are sealed against the penetration of moisture both when they are interconnected and when they are separated.

A slip ring assembly including a plurality conducting disks spaced-apart and stacked mounted along a common rotation axis, each being electrically connectable and fixedly securable to a generator mounted in a rotatable nacelle of a wind turbine so that a rotation of the rotatable nacelle triggers a rotation of the conducting discs; and a plurality of slip ring devices, each being electrically connectable and mechanically securable to a fixed electrical distribution conductor mounted to a fixed pole so as to have a fixed position relative to the fixed pole, and each of the plurality of the slip ring devices having upper and conducting fingers arranged so as to rotatably receive a respective conducting disk therebetween and to provide an electrical connection between the conducting disks and the slip ring device during rotation of the nacelle.

A method for manufacturing a power distribution member includes preparing a solid wire with a circular cross-sectional shape, pressing to a portion of the solid wire in a pressing direction orthogonal to the solid wire to cause plastic deformation, thereby forming a pair of small curvature surfaces on an outer circumference of the solid wire on both sides in the pressing direction, the small curvature surfaces having a smaller curvature than an outer circumferential surface of the solid wire before the pressing and facing the pressing direction, preparing a terminal metal piece including a pair of facing walls facing each other and a coupling wall coupling between ends of the pair of facing walls, inserting the solid wire after the pressing between the pair of facing walls of the terminal metal piece in such a manner that one of the pair of small curvature surfaces faces one of the pair of facing walls and the other of the pair of small curvature surfaces faces the other of the pair of facing walls, and, after the inserting, crimping the pair of facing walls onto the solid wire.

Devices, systems, and methods for repair and upgrade of the connection between a winding and a wye ring of a rotating electric machine. The system generally includes an attachment lug and a flexible lead having a curved central region formed of several layers of laminated copper. A first end of the flexible lead may be connected to the winding by the attachment lug and a second end of the flexible lead may be connected to the wye ring. The system may further include a wye ring assembly specifically configured to provide attachment for the connection elements.

Devices, systems, and methods for repair and upgrade of the connection between a winding and a wye ring of a rotating electric machine. The system generally includes a flexible connector having an elongated curved central region. A first end of the flexible connector may be connected to the winding by brazing and a second end of the flexible connector may be connected to the wye ring as a brazed puzzle or dovetail joint. The system may further include a wye ring assembly specifically configured to provide attachment for the flexible connectors.

A slip ring body for electrically contacting an asynchronous machine includes first and second slip rings rigidly connected to one another, with at least two conductor bars fastened to each of the slip rings. At least one of the slip rings has a recess for passage of the conductor bars of the other slip ring and defining around the recess a first region in which air is at least partially present and which has a magnetic conductivity that is lower than a magnetic conductivity in a second region in which the conductor bars to the one slip ring are fastened, or which second region is embodied for contacting with an energy-transmitting brush. The first and second regions are not made of copper. The recess defines an opening cross-sectional area which is greater than a cross-sectional area of the conductor bars fastened to the one slip ring.

A DC motor is provided that can suppress a commutator from wearing. A DC motor including a commutator formed of copper or a copper alloy of 99% or more copper, and a brush pressed against and in contact with the commutator, wherein the brush is composed of a sintered compact including graphite and copper powder, hard compound particles higher in hardness than any of the copper or the copper alloy and the graphite or the copper powder are contained in at least one of the commutator and the brush and are scattered on or near a contact surface of the commutator with the brush at least during use.

An electrical rotating machine, such as a generator or motor, communicates power from a stationary location to the rotating rotor of the rotating machine via opposed pairs of capacitor plates, one plate of each pair rotating with the rotor and one plate of each pair fixed not to rotate. Larger plate gaps suitable for mechanically rigid plates are possible through high-voltage and high-frequency AC signals managed by using a dielectric support design for the capacitor plates minimizing dielectric loss and/or impedance matching on the rotor.