Internal rotor with rotor plate having sprung web-shaped clamping element to clamp the magnet and two recesses

US11424649B2 · kind B2 · utility

Assignee

• ebm-papst St. Georgen GmbH & Co. KG · DE

Inventors

• Arnold Schulde · Villingen-Schwenningen, DE
• Juergen Herr · St. Georgen, DE
• Johannes Fehrenbach · Unterkirnach, DE
• Markus Flaig · Remshagen, DE
• Christoph Mayer · St. Georgen, DE
• Serkan Poyraz · Villingen-Schwenningen, DE
• Bozidar Radjenovic · St. Georgen, DE

Key dates

• Filing date: Feb 9, 2018
• Grant date: Aug 23, 2022
• Expiry date: May 19, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K2213/03
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An internal rotor for an electric motor has a laminated rotor core with a multiplicity of rotor plates, and multiple pockets in each of which pocket a rotor magnet is at least partially arranged. The rotor plates have first recesses for forming the pockets and at least a first rotor plate which has at least a second recess associated with a first recess. A sprung web-shaped clamping element is formed between the second recess and the associated first recess, and tensioned toward the second recess by the associated rotor magnet to apply a force to the associated rotor magnet toward the first recess in order to hold the associated rotor magnet in the pocket. A rotor plate holds a rotor magnet in a pocket of a laminated rotor core.