The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 11, 2014
Filed:
Mar. 30, 2011
Jean-claude Matt, Dijon, FR;
Jérome Legranger, Creteil, FR;
Jean-Claude Matt, Dijon, FR;
Jérome Legranger, Creteil, FR;
Valeo Equipements Electriques Moteur, Creteil Cedex, FR;
Abstract
A synchronous rotating electrical machine is disclosed, of the type including a stator () and a rotor (). The rotor is of the flux concentration type and includes a plurality of alternate North and South poles formed from permanent magnets (PM). The magnets are housed in slots (E) arranged in the magnetic body of the rotor. The rotor includes, for each permanent magnet, a magnetic circuit allowing the circulation of a defluxing magnetic flux. This magnetic circuit has a magnetic reluctance of the defluxing circuit (R) determined as a function of an internal magnetic reluctance of the magnet (R) such that the ratio (R/R) of the magnetic reluctance of the defluxing circuit on the internal magnetic reluctance of the magnet (R) is within a range of predetermined values guaranteeing the magnet against a risk of demagnetization. This range of predetermined values is from approximately 0.3 to approximately 3 depending on the type of magnet.