The paper presents a simple technique for correctly and fastly tuning
the slip gain in Indirect Field Oriented Control drives. To this aim n
o other transducers than the tachogenerator, usually included in such
drives, are needed, as the tuning operation is performed by processing
the effects of a suitable test signal injected in the system. The pro
posed approach can be used either for on-line retuning of working driv
es, either for the initial tuning of new installed drives. Simulation
and experimental tests show that the procedure is effective and does n
ot interfere with normal operations of the drive.