pole-changing asynchronous machine for variable supply frequency

摘要

The present invention relates to an asynchronous motor, which can be connected to alternating voltages with a variable frequency and in the case of these alternating voltages with at least two different numbers of poles is operable with a stator with a plurality of groups of coils of existing stator winding or a plurality of stator windings and a rotor, with tapping conduits and / or the ends of the stator windings separately from the motor to a change-over switch are guided, which a limiting the speed of the asynchronous motor to a predetermined range by pole reversal allows. Furthermore, the invention relates to a method for the operation of such an asynchronous motor to alternating voltages of variable frequency.