Patent ID: 7944102

Claim:
An electrical machine, comprising: a stator having circumferentially arranged winding heads, with a winding head space being defined radially beneath the winding heads; a rotor interacting with the stator and having a rotatable laminated core which is arranged on a shaft, said winding heads of the stator having an outer face end extending in a perpendicular relationship to the shaft; and a magnetic brake received in its entirety inwardly of the outer face end of the winding heads within the winding head space and including a magnet module having at least one permanent magnet which is constraint against rotation and which is magnetized in an axial direction, and an electromagnet which is arranged axially adjacent to the permanent magnet and securely fixed thereto, with the electromagnet producing a magnetic field with a main direction oriented in an axial direction, and a ring-shaped armature which interacts with the at least one permanent magnet and the electromagnet and is secured directly and rigidly to the rotor so as to establish a fixed rotative engagement between the armature and the rotor, wherein the magnet module is movable in an axial direction between a first position in which current is applied so that the magnet module and the armature are not attracted to one another in the absence of a braking action, and a second position in which no current is applied so that the magnet module and the armature are attracted to one another in the presence of a braking action.