Abstract: A high speed rotor for use with a flywheel comprising a hub, a rim centered with respect to said hub, connecting arms, each in the form of an elongated loop connecting said rim to said hub. The inner end of each loop is centered and maintained against the centrifugal force through a central member belonging to the hub while the outer end of said loop is bearing against the rim, a mass included within said outer end providing elongation of the loop under the effect of centrifugal force to ensure constant contact between said connecting arms and said rim.

Abstract: An uninterruptible electric power source comprising a rotor and a stator with the stator having a magnetically suspended flywheel with magnet rings for radial centering, a double electromagnet in a servoloop for restoring equilibrium including a rate sensor and lift-off logic in the servoloop encased in an evacuated vacuum enclosure. Variation in the structure of elements including the enclosure are described.

Abstract: Rotary bodies possessing, in common, radially passive and axially active magnetic centering devices, eddy current dampers, emergency support systems, a drive motor and a motor switching sensor, and an axial velocity sensor to send correction signals to the axially active magnetic centering device with all of these members positioned at the maximum permitted axial limits, either inside or outside the rotor wall, whether the rotor is of an internal or external configuration.

Abstract: Electromagnetic method and apparatus to accurately control the orientation of a platform according to two axes wherein pivoting of the platform about two orthogonal axes passing through its center is effected by electromagnetic means, with the servo-control being obtained by using a detector responsive to the angle of deviation from a reference direction, an amplifier, a low-pass filter, a phase lead filter and power amplifiers supplying currents to the electromagnetic devices. The method and apparatus is particularly adapted to the orientation of platforms carrying means such as aerials or inertia wheels intended for piloting a space vehicle.

Abstract: A method and device for balancing magnetically suspended bodies wherein at the axial ends of the bodies are included two centering devices on the rotor side constituted by centered and excentric magnetic rings facing two centering devices on the stator side with centered and excentric magnetic rings, the magnetic field in the air gaps between the pairs of rings being made variable according to signals received from correction sensors of the axes and of the alignment.

Abstract: The invention relates to an inertial method and device enabling the centering of a circular rim on its hub to be ensured and giving a practical solution to the problem of the static and dynamic balancing of rotors. The device comprises a rim, a hub, at least one linking arm with two branches passing around the hub. Masses localized at the ends of the arms ensure, in the course of rotation, the holding fast, by pressure, of the arm to the rim, on the one hand, and by traction on the branches on the other hand, of the arm to the hub. Anisotropic masses distributed between the arms keep the circularity of the rim constant. Electro-mechanical means ensure the static and dynamic balancing of the arm-rim-hub assembly. The invention may be used for the rotors of kinetic energy storage system.

Abstract: An inertia wheel more particularly adapted to space applications. It includes the combination of a peripherical type of motor with permanent magnet on the rotor and ironless winding on the stator. The current of said winding is switched electronically by an amplitude modulation system, associated to a reactance coefficient varying circuit, and reversal of the direction of rotation of which is achieved by permutation of the control circuits. There are also provided bearings formed by a passive radial magnetic centering device and a redundant active axial magnetic centering device slaved to an axial rate detector.

Abstract: A device for temporarily holding fast a free circular element with respect to a fixed circular element having circular segments with tangential ramps and a rigid ring with rollers axially rotatable thereon for local thrust against the ramps to cause locking of the free circular element with respect to the fixed circular element. Clevises bearing axial grooved rollers riding on the rigid ring, with the clevises connected to the segments by springs, providing an elastic restoring force to release the free circular element with respect to the fixed circular element.

Abstract: The invention provides a satellite momentum wheel with passive magnetic centering means, between a stator and a rotor comprising at least one passive radial magnetic centering device, at least one axial magnetic centering device slaved to an axial velocity sensor and to an axial position sensor, at least one centering motor-generator unit having a magnetized rotor and a stator with toroidal windings switched by an angular rotation position sensor, at least one damping device, two emergency taper pivots for safe centering of the axial mounting of the rotor one of which is possibly in contact with a doped-polyamide step bearing on the stator, and interconnecting means between the wheel rim and the axis of said pivots employing a so-called coated arrayed-thread type cycloprofile structure.