| 摘要 |
A polyphase electric machine includes a stator impinged by an electromagnetic rotating field, which has a yoke having yoke teeth having at least partially peripheral slots, in which windings generating a magnetic field are situated, and having a rotor rotatable around an axis having permanent magnets, which is peripherally separated from the stator by an air gap, the rotor being fixedly connected to a pulley, the yoke teeth in the stator being assembled into modules, whose number is equal to the current phases or corresponds to their integral multiple, each module including a number of at least one yoke tooth and-in the event of a possible pole pitch of the rotor to slot pitch of the stator ratio of 9/8-yoke teeth of a module directly neighboring one another having opposite magnetic field polarity. Using this system, an electric drive having a particularly flat construction, in particular for an elevator drive, may be implemented, which has increased force density and simultaneously significantly reduced torque ripple.
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