Magnetic coupling with hysteresis, particularly for...

H - Electricity – 02 – K

Patent

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H02K 49/06 (2006.01)

Patent

CA 2647583

A magnetic coupler with hysteresis (1) comprises an inductor subassembly (2) and an armature subassembly (6) that are capable of rotating one with respect to the other. The inductor subassembly has a plurality of magnetic poles and the armature subassembly (6) has one or more armature permanent magnets with hysteresis (11, 12). The invention is notable in that the or each armature magnet is produced in the form of a ring of one piece in magnetic material with vertical hysteresis and has through-slots for attenuating radial currents each running in the direction of the circumferential spread of the ring. Application to limiting heating and reducing axial bulk.

Un coupleur magnétique à hystérésis (1) comprend un sous-ensemble inducteur (2) et un sous-ensemble induit (6) susceptibles de tourner l'un par rapport à l'autre. Le sous-ensemble inducteur possède une pluralité de pôles magnétiques et le sous-ensemble induit (6) possède un ou plusieurs aimants permanents induits à hystérésis (11,12). L'invention est remarquable en ce que le ou chaque aimant induit est réalisé sous forme d'une couronne d'un seul tenant en matériau magnétique à hystérésis vertical et comporte des fentes traversantes d'atténuation des courants radiaux s'étendant chacune dans la direction de l'étendue circonférentielle de la couronne. Application à la limitation de l'échauffement et à la diminution de l'encombrement axial.

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