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A magnetic suspension device for inertial wheel or rotary body holds a rotor coaxially with respect to a stator while being mechanically free. On the stator side it comprises an inner continuous ferromagnetic crown and an outer discrete ferromagnetic crown formed with a plurality of diametrically op

A magnetic suspension device for inertial wheel or rotary body holds a rotor coaxially with respect to a stator while being mechanically free. On the stator side it comprises an inner continuous ferromagnetic crown and an outer discrete ferromagnetic crown formed with a plurality of diametrically opposite sectors provided with coils. Between said crowns there is interposed an axially magnetized crown carried on the rotor and clamped between two annular flanges. Said coils provide for radial centering of the rotor whereas the magnetized crown provides for axial centering thereof. The association of the crowns and the sectors ensures minimum path for the induction lines. The magnetic suspension device is intended for space or terrestrial applications especially for satellites, telecommunications, vacuum pumps, printing cylinders, machine-tools, optical scanning systems and the like.

대표청구항 ▼

A device for magnetic suspension of a rotor in respect to a stator, said rotor being mechanically free with respect to the stator and being rotatably driven with respect to said stator about a rotational axis by means of a motor, said device comprising: two pairs of identical ferromagnetic sectors d

A device for magnetic suspension of a rotor in respect to a stator, said rotor being mechanically free with respect to the stator and being rotatably driven with respect to said stator about a rotational axis by means of a motor, said device comprising: two pairs of identical ferromagnetic sectors diametrically opposite with respect to said axis, and provided on the stator according to different radial axes; said sectors comprising lower and upper discrete polar parts integrally made with cylindric bottom portions; electric coil means about at least one of said sectors in each pair; sensing means coupled to each pair of said sectors for supplying corresponding said electric coil means thereof with an electric signal representative of the shift of the rotor with respect to the stator parallel to the corresponding radial axis; an intermediary crown provided on the rotor radially opposite to said sectors through an annular gap therebetween, comprising an axially magnetized crown axially clamped between two lower and upper ferromagnetic annular flanges; a continuous U-shaped cross-section ferromagnetic crown provided on the stator facing the sectors, on the other side radially of said intermediary crown with an annular gap therebetween, said continuous crown comprising lower and upper polar rings made integrally with a cylindric bottom; whereby the pairs of sectors and continuous crown are disposed so as to close up, on either part of the intermediary crown through corresponding gaps, induction lines emitted by the magnetized crown.