초록 ▼

The present invention relates to a system for driving two mechanical members in rotation about an axis by magnetic coupling of the attractive type, the system comprises respective magnetic elements secured to each of said mechanical members, the two magnetic elements being concentric, one of them be

The present invention relates to a system for driving two mechanical members in rotation about an axis by magnetic coupling of the attractive type, the system comprises respective magnetic elements secured to each of said mechanical members, the two magnetic elements being concentric, one of them being made up of two identical magnetic rings of minimum radius R3 and of maximum radius R4, and the other one of them being made up of a magnetic ring having a minimum radius R1 and a maximum radius R2, with its midplane perpendicular to the axis of rotation being offset by a distance d from the midplanes of each of said two identical rings. Each ring possesses magnetization in a direction contained in a plane that is perpendicular to the axis of rotation. Each ring also possesses N magnetic poles uniformly distributed around said axis of rotation. The ratio 2d/│(R3+R4)-(R1+R2)│lies in the range 0.2 to 0.8.

대표청구항 ▼

A drive system for rotating two mechanical members about an axis by means of magnetic coupling, the system comprising a magnetic element secured to each of said mechanical members, the two magnetic elements being concentric, the first of said magnetic elements possessing N magnetic poles regularly d

A drive system for rotating two mechanical members about an axis by means of magnetic coupling, the system comprising a magnetic element secured to each of said mechanical members, the two magnetic elements being concentric, the first of said magnetic elements possessing N magnetic poles regularly distributed about the axis of rotation in a ring having a minimum radius R1 and a maximum radius R2, where N is even, the second magnetic element possessing N magnetic poles regularly distributed about said axis of rotation in a first ring and N magnetic poles regularly distributed about the axis of rotation in a second ring identical to the first ring, where both rings have a minimum radius R3 and a maximum radius R4, said rings of said second magnetic element being mechanically secured to each other and each having a respective midplane perpendicular to the axis of rotation that is axially offset by a distance d from the midplane of the ring of the first magnetic element in such a manner as to lie on opposite axial sides of said first magnetic element, wherein said first and second magnetic elements are magnetically coupled by attractive forces, the magnetization of each magnetic element having a direction that is contained in a plane perpendicular to the axis of rotation, and wherein the ratio 2d/│(R3+R4)-(R1+R2)│lies in the range 0.2 to 0.8.