Abstract: An electromagnetic rotary drive includes a rotor and a stator. The rotor magnetically driven without contact about an axial direction, and magnetically levitated without contact with respect to the stator. The rotor actively magnetically levitated in a radial plane and passively magnetically stabilized in the axial direction against tilting. The stator has coil cores, each including a longitudinal limb extending in the axial direction and a transverse limb arranged in the radial plane. The transverse limb extends from the longitudinal limb and is bounded by an end face. A concentrated winding is arranged on each of the longitudinal limbs surrounding a respective longitudinal limb. The end faces have a first distance in the radial direction from a first portion and a second distance in the radial direction from a second portion, the second distance greater than the first distance.

Abstract: A pinch valve system includes a closing element arranged in an axial direction and includes a closing piece, a permanent magnetic holding device to hold the closing element by a permanent magnetic force in an open or closed position, without energy being supplied to the permanent magnetic holding device, an electromagnetic actuating device to carrying out a switching process, with which the closing element is configured to be moved from the open position to the closed position or from the closed position to the open position, an energy storage device to store an electrical energy which is sufficient to carry out the switching process, and a controller programmed with a predetermined rest position, which is the open or closed position, and the controller configured to trigger the switching process with which the closing element is brought to the rest position by the energy stored in the energy storage device.

Abstract: An electromagnetic rotary drive includes a rotor and a stator. The rotor magnetically driven without contact about an axial direction, and magnetically levitated without contact with respect to the stator. The rotor actively magnetically levitated in a radial plane and passively magnetically stabilized in the axial direction against tilting. The stator has coil cores, each including a longitudinal limb extending in the axial direction and a transverse limb arranged in the radial plane. The transverse limb extends from the longitudinal limb and is bounded by an end face. A concentrated winding is arranged on each of the longitudinal limbs surrounding a respective longitudinal limb. The end faces have a first distance in the radial direction from a first portion and a second distance in the radial direction from a second portion, the second distance greater than the first distance.

Abstract: An electromagnetic rotary drive includes a rotor including a magnetically effective core surrounded by a stator. The stator has poles arranged around the magnetically effective core and each of the poles is delimited by an end face. The rotor is capable of being magnetically driven without contact in an operating state about an axial direction, and is capable of being magnetically levitated without contact with respect to the stator. The rotor is configured to be magnetically levitated in a radial plane and is passively magnetically stabilized in the axial direction against tilting. The magnetically effective core has a rotor height which is a maximum extension of the magnetically effective core in the axial direction, the rotor height being greater than a stator pole height defined by a maximum extension of the end faces in the axial direction.