Rotor with permanent excitation having permanent magnets and flux conducting elements therebetween, electric machine having such a rotor and manufacturing method for the rotor

US9312732B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Daniel Mader · Bad Neustadt an der Saale, DE
• Rolf Vollmer · Gersfeld, DE

Key dates

• Filing date: Mar 15, 2013
• Grant date: Apr 12, 2016
• Expiry date: Apr 1, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/64
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A rotor includes a shaft and a plurality of permanent magnets which are arranged around the shaft in a circumferential direction for permanent excitation. At least one of the permanent magnets is attached to the shaft by a material joint or formfit. A flux conducting device for conducting a magnetic flux of the permanent magnets has a plurality of separate soft-magnetic flux conducting elements, with each flux conducting element being mounted between two of the permanent magnets and fixed thereto so as to be indirectly held in place on the shaft. At least one of the flux conducting elements has at least one contact area sized to cover an outer edge of one of the permanent magnets in the radial direction.