Electromagnetic rotary drive and rotational device

An electromagnetic rotary drive configured as a temple motor, comprising:

• a rotor configured to be contactlessly magnetically drivable, and is coil-free and free of permanent magnets, the rotor comprising a magnetically effective core;
• and
• a stator configured to contactlessly magnetically drive the rotor about an axis of rotation in an operating state, the stator having a plurality of coil cores, each of the plurality of coil cores comprising a bar-shaped longitudinal limb extending from a first end in a direction in parallel with a desired axis of rotation up to a second end, the first ends being configured to be connected by a reflux, and a plurality of windings configured to generate an electromagnetic rotational field, each of the plurality of windings surrounding one of the longitudinal limbs, and the coil cores comprising a plurality of permanent magnets capable of generating a permanent magnetic pre-magnetization flux, and
• each coil core comprising a transverse limb arranged at the second end of the longitudinal limb and extending in a radial direction perpendicular to an axial direction defined by the axis of rotation and a permanent magnetic portion extending from the first end up to the second end of the longitudinal limb and two permanent magnet-free portions that each extend from the first end up to the second end, with the permanent magnetic portion being arranged between the two permanent magnet-free portions.