Electric machine with a rotor constructed of permanent...

H - Electricity – 02 – K

Patent

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Details

H02K 1/27 (2006.01)

Patent

CA 2301535

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 di-rection, and with one magnetic flux conducting piece assembly (10) of at least one magnetic flux con-ducting piece (10a; 10b) between two adjacent perma-nent magnets each; (b) the permanent magnets (8) - when looking at the overall geometry - each having an increasing circum-ferential 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 circum-ferential 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). (Fig. 1)

L'invention concerne une machine électrique comportant un stator et un rotor (2) séparés par un entrefer (12). La machine électrique selon l'invention présente les caractéristiques suivantes: a) le rotor (2) est constitué d'aimants permanents (8) magnétisés pratiquement dans le sens périphérique avec, respectivement, un agencement d'éléments conducteurs de flux magnétique (10) placé entre deux aimants permanents voisins (8) et constitué d'au moins un élément conducteur de flux magnétique (10a, 10b); b) les aimants permanents (8) ont chacun - eu égard à la géométrie d'ensemble - une largeur périphérique qui augmente de la zone de tête côté entrefer vers la zone de base; c) les agencements d'éléments conducteurs (10) entre deux aimants permanents voisins (8) ont chacun - eu égard à la géométrie d'ensemble - une largeur périphérique qui diminue de la zone de tête côté entrefer vers la zone de base. La machine électrique selon l'invention est caractérisée en ceci que d) les éléments conducteurs (10a, 10b) présentent, à l'extrémité de la base, un élargissement en sens périphérique comportant au moins un épaulement (20) grâce auquel ils s'appuient sur un aimant permanent voisin (8) afin de ne pas se déplacer vers l'entrefer (12).

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