Electric machine with a rotor constructed of permanent magnets and magnetic flux guides

US6384504B1 · kind B1 · utility

Assignee

• Magnet-Motor Gesellschaft fuer magnetmotorische Technik mbH · DE

Inventors

• Peter Ehrhart · Birkenfeld, DE
• Gerhard Reiner · Villingen-Schwenningen, DE
• Ludwig Lindner · Hersbruck, DE
• Christian Lucas · Braunschweig, DE
• Fritz Walter · Raisting, DE

Key dates

• Filing date: Feb 28, 2000
• Grant date: May 7, 2002
• Expiry date: Feb 28, 2020

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K7/1838
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An electric machine comprising a stator and a rotor (2) separated by an air gap (12),(a) the rotor (2) being composed with permanent magnets (8) magnetized substantially in circumferential direction, and with one magnetic flux conducting piece assembly (10) of at least one magnetic flux conducting piece (10a; 10b) between two adjacent permanent magnets each;(b) the permanent magnets (8)—when looking at the overall geometry—each having an increasing circumferential width from the head portion on the side of the air gap to the foot portion;(c) and the conducting piece assemblies (10) between two adjacent permanent magnets (8)—when looking at the overall geometry—each having a decreasing circumferential width from the head portion on the side of the air gap to the foot portion, characterized in(d) that the conducting pieces (10a; 10b) at the foot end each have a widened portion in circumferential direction, having at least one shoulder (20) through which they are supported on an adjacent permanent magnet (8) against displacement in the direction towards the air gap (12).