Magnet holder, sensor magnet assembly, electric motor comprising a sensor magnet assembly, and method for producing a sensor magnet assembly

US11108314B2 · kind B2 · utility

Assignee

• BÜHLER MOTOR GMBH · DE

Inventors

• Nils Marius Gehring · Herzogenaurach, DE
• Paul-Peter Golditz · Nuremberg, DE
• Peter Schneider · Decatur, US
• Bertram Baudler · Nuremberg, DE
• Gerhard Mehl · Ergolding, DE
• Stephan Kach · Fairview Avenue, DE

Key dates

• Filing date: Oct 28, 2019
• Grant date: Aug 31, 2021
• Expiry date: Apr 27, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/07
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A magnet holder for attaching a sensor magnet to a motor shaft of an electric motor, including a receiving recess for the sensor magnet and an attachment region for attachment to the motor shaft, wherein the receiving recess is radially delimited by a wall that, over the circumference thereof, includes a plurality of weak spots which have a reduced wall thickness and are designed so that free spaces remain between the weak spots and the sensor magnet arranged in the receiving recess. The invention further relates to a sensor magnet assembly, to an electric motor comprising a sensor magnet assembly, and to a method for producing a sensor magnet assembly. It is the object of the present invention to very reliably and durably attach a sensor magnet to the end of a motor shaft in a very economical and simple manner, wherein adhesive methods are to be dispensed with.