Abstract: In this invention a method of manufacturing and structure of prestressed composite reinforcements for cylindrical liners is presented. The method relies on creating deep precompression in the liner compensated by according pretension in the reinforcement. This method allows efficient use of mechanical properties of material of the liner and reinforcement and can provide a substantial mass reduction of the overall component.

Abstract: In this invention a method of manufacturing and structure of prestressed composite reinforcements for cylindrical liners is presented. The method relies on creating deep precompression in the liner compensated by according pretension in the reinforcement. This method allows efficient use of mechanical properties of material of the liner and reinforcement and can provide a substantial mass reduction of the overall component.

Abstract: An electric machine having a hybrid bearing for the purpose of supporting a rotor with respect to a stator, the hybrid bearing consisting of a radial bearing, taking the form of a fluid dynamic bearing, and an axial bearing that is made up of magnetic elements, wherein the magnetic elements comprise at least one permanent magnet and one flux guide element that are disposed so as to be located opposite each other in a radial direction.

Abstract: A stator arrangement and a rotor arrangement for a transverse flux machine. The stator arrangement comprises an annular stator back yoke having a number of stator poles designed in the manner of claw poles. The rotor arrangement includes number of rotor poles designed in the manner of claw poles and connected to each other to form an annular rotor body enclosing a unipolar ring magnet magnetized in an axial direction. In the stator arrangement, the stator back yoke includes a first laminated stack of metal sheets whose laminations are stacked in an axial direction, and the stator poles include a second laminated stack of metal sheets whose laminations are stacked in a tangential direction. In the rotor arrangement, the rotor poles include laminated stacks of metal sheets whose laminations are stacked in a tangential direction.

Abstract: An electric machine having a hybrid bearing for the purpose of supporting a rotor with respect to a stator, the hybrid bearing consisting of a radial bearing, taking the form of a fluid dynamic bearing, and an axial bearing that is made up of magnetic elements, wherein the magnetic elements comprise at least one permanent magnet and one flux guide element that are disposed so as to be located opposite each other in a radial direction.

Abstract: The invention relates to a spindle motor having a stationary part and a rotating part that are rotatably supported with respect to each other by means of radial and axial bearing systems, the radial bearing system being a fluid bearing and the rotating part being driven by an electromagnetic drive system. The spindle motor is characterized in that the axial bearing system is designed as a magnetic bearing and that it operates against a magnetic preload.

Abstract: The invention provides a stator arrangement as well as a rotor arrangement for a transverse flux machine. The stator arrangement comprises an annular stator back yoke having a number of stator poles that are designed in the manner of claw poles. The stator winding is located between the stator back yoke and the stator poles. The rotor arrangement is constructed in a similar way in which a number of rotor poles are designed in the manner of claw poles and connected to each other such that they form an annular rotor body that encloses a unipolar ring magnet magnetized in an axial direction. In the stator arrangement according to the invention, the stator back yoke is made of a first laminated stack of metal sheets whose laminations are stacked in an axial direction, and the stator poles are made of a second laminated stack of metal sheets whose laminations are stacked in a tangential direction.