Rotor for an electric machine

H - Electricity – 02 – K

Patent

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Details

H02K 1/27 (2006.01) H02K 1/22 (2006.01)

Patent

CA 2732275

A rotor for an electrical machine includes a rotor hub and a plurality of permanent magnet segments affixed around a perimeter of the rotor hub. In certain instances, the segments have rounded outer surfaces and form a cylindrical outer surface of the rotor when mounted to the rotor hub. Permanent magnets are selected to construct a rotor with a particular magnetic field. In certain instances, the segments include a first plurality of the permanent magnet segments and at least one multi-piece permanent magnet segment including at least two pieces, each piece having a smaller arcuate span than segments in the first plurality of segments, the magnetization direction vector of one piece different than the magnetization direction vector of at least one other piece in each multi-piece segment. In certain instances, the plurality of segments include primary magnet segments and interpole magnet segments defining two or more poles, the segments having a uniformly oriented direction vector component. In certain instances, segments in a two-pole rotor configuration have direction vector components substantially parallel and oriented in substantially the same direction.

Rotor pour machine électrique comprenant un moyeu et une pluralité de segments d'aimants permanents fixés sur le périmètre dudit moyeu. Dans certains cas, les segments présentent des surfaces extérieures arrondies et forment pour le rotor une surface extérieure cylindrique après montage sur le moyeu de rotor. Les aimants permanents sont sélectionnés de manière à constituer un rotor à champ magnétique particulier. Dans certains cas, les segments incluent une première pluralité de segments d'aimant permanent et au moins un segment d'aimant permanent pluri-élément (au moins deux éléments), chaque élément présentant une courbure plus faible que les segments de ladite pluralité de segments, et le vecteur de direction de magnétisation d'un élément différant du vecteur de direction de magnétisation de l'autre élément de chaque segment pluri-élément. La pluralité d'éléments peut inclure des segments d'aimant primaire et des segments d'aimant interpolaire définissant deux pôles ou plus, les segments ayant une composante vectorielle de direction à orientation uniforme. Dans certains cas, les segments d'une configuration bi-polaire ont des composantes vectorielles de direction sensiblement parallèles et orient sensiblement selon la même direction.

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