Method for producing a squirrel-cage rotor of an asynchronous machine

US12395049B2 · kind B2 · utility

Assignee

• INNOMOTICS GMBH · DE

Inventors

• Klaus Büttner · Hollstadt, DE
• Klaus Kirchner · Nidderau, DE
• Matthias Warmuth · Windshausen, DE

Key dates

• Filing date: Jul 17, 2020
• Grant date: Aug 19, 2025
• Expiry date: Sep 4, 2042

Classification

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

Abstract

In a method for producing a squirrel-cage rotor of an asynchronous machine, conductor bars of a first conductive material are inserted into slots of a magnetically conductive body such as to project out of at least one end side to form a projection. A short-circuiting disc of a second conductive material is positioned under pressure on the projection with a clearance fit of approximately 0.1 mm relative to a radially outwardly open recess of the short-circuiting disc. The short-circuiting disc is heated while the conductor bars virtually contact the short-circuiting disc. At least the projection of the conductor bars is coated with a third material at a layer thickness to form an alloy with the first and second materials after heating so that the third material is fully dispersed in the first and second materials as a result of the third material being diffused into the first and second materials.