To create an electric motor, comprising a rotor and a stator, whereby the
rotor is spherically supported, which motor has a high efficiency, it is
proposed, that the rotor produces a magnetic field, that the surface of
the rotor facing the stator has a spherical configuration, that the rotor
and stator are adapted to each other so that a maximal magnetic
attraction force which keeps the rotor on the spherical bearing is larger
than the maximal axial counterforce.