Slip ring, slip ring unit, electric machine, and wind turbine

US11387713B2 · kind B2 · utility

Assignee

• Flender GmbH · DE

Inventors

• Herbert Binder · Hagebök, DE
• Robert Gruber · Regensburg, DE
• Oliver Memminger · Passau, DE

Key dates

• Filing date: Jun 13, 2019
• Grant date: Jul 12, 2022
• Expiry date: Jun 13, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/72
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A slip ring includes an essentially cylindrical contact region defined by a radius and having a contact region which faces in a radially outwards direction. The contact region has a recess in a region of the contact surface, with the recess configured to have a projection extending on an inner side of the recess and/or being interrupted in a tangential direction. The contact region has an annular surface formed with an opening which communicates with the recess and extends towards an axial direction at an incline at an interval of 5 degrees to 45 degrees with respect to a normal of the annular surface. At least two insulating regions are arranged axially adjacent to the contact region and each being defined by a radius, with the radius of the contact region being larger than the radius of the insulating region.