Method for producing a rotor, rotor, and electric machine

By timing the pressing of potting material after the viscosity minimum during the gelling process, the method addresses leakage issues in rotor manufacturing, resulting in improved manufacturing quality and reduced scrap.

WO2026086990A1PCT designated stage Publication Date: 2026-04-30BAYERISCHE MOTOREN WERKE AG
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
BAYERISCHE MOTOREN WERKE AG
Filing Date
2025-10-06
Publication Date
2026-04-30

AI Technical Summary

Technical Problem

The existing methods for manufacturing rotors in electric machines face issues with potting material leakage due to shrinkage during the gelling process, leading to costly rework or unusable components.

Method used

A method involving controlled introduction of heat to initiate the gelling process and subsequent pressing of potting material after a viscosity minimum is reached, ensuring optimal filling without leakage at sealing points.

Benefits of technology

This approach enhances manufacturing quality by preventing material escape and reducing scrap, achieving a high fill level with improved tightness and reduced rework.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a method for producing, in particular for casting, a rotor, the method comprising the steps of: - providing a rotor; - introducing casting material into the rotor, the casting material having a first viscosity towards the end of the casting process; - introducing heat into the rotor starting from a second point in time, thereby initiating the gelation process; - pressing casting material starting from a third point in time which is after the second point in time.
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Citation Information

Patent Citations

  • Rotor and method for manufacturing a rotor

    DE102021113309A1

  • Method for manufacturing a rotor for an electric machine and electric machine

    DE102021134586A1

  • Method for manufacturing a stator of an electric machine

    EP4068596A1

  • Motor core manufacturing apparatus and method for manufacturing motor core

    JP7488428B1