Slip ring arrangement with contacts that can be acted upon by a fluid and rotor of a separately excited synchronous machine

The compact nested slip ring arrangement with hydraulic cylinders and insulated conductors addresses the challenge of achieving high power density and efficiency in electric motors, enhancing service life and reducing wear.

DE102024119752B4Active Publication Date: 2026-05-28SCHAEFFLER TECHNOLOGIES AG & CO KG
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Patent Information

Application Number
DE102024119752
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2024-07-11
Publication Date
2026-05-28
Estimated Expiration
2044-07-11

AI Technical Summary

Technical Problem

Existing slip ring arrangements in electric motors, particularly for electric vehicle drives, face challenges in achieving a compact design with high power density and efficiency while minimizing manufacturing costs and wear.

Method used

A compact, nested slip ring arrangement is designed with hydraulic cylinders for contact pins, allowing adjustable contact force and insulation, and conductors are positioned to minimize electrical shorts and mechanical stresses, using support elements and grooves for fixation and insulation.

Benefits of technology

The solution achieves a compact design with adjustable contact force, reduced wear, and enhanced electrical insulation, thereby improving power density and efficiency while extending the service life of the slip ring assembly.

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Abstract

Slip ring arrangement (1) for an electric machine, comprising - a first slip ring (2) which has a radial inner surface and a radial outer surface, - a first contact pin (3) which forms an electrically conductive sliding contact with the first slip ring (2), - a first conductor (4) extending axially from the first slip ring (2), which is electrically connected to the first slip ring (2), and - a substantially hollow cylindrical first support element (5) having a radial inner side and a radial outer side, wherein the first slip ring (2) is arranged with its radial outer side on the radial inner side of the first support element (5), characterized by the fact that the first conductor (4) is enclosed between the radial inner side and the radial outer side of the first support element (5), wherein the first contact pin (3) is guided radially displaceable within a second support element (6) and can be subjected to force in a first radial direction, wherein the second support element (6) is arranged in a volume which is defined in the radial direction by the radial inner side of the first slip ring (2), wherein the second support element (6) is rotatably arranged relative to the first support element (5) and wherein the first contact pin (3) on the side opposite the sliding contact in the radial direction can be subjected to force by a fluid.
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Citation Information

Patent Citations

  • Device for power transmission from the fixed to the rotating part of an electrical machine

    DE1488447B1

  • Contact-commutated electric motor

    US9960560B2

  • Device for power transmission from the fixed to the rotating part of an electrical machine

    DE1488447B