In this paper, a V/f control for high-power induction motor drives is analysed. In such uses, low dynamics in terms of speed-loop bandwidth is usually required. However, in some applications, where the load consists of a long shaft with certain mechanical components and with some resonant frequencies, instability and torque oscillations can cause significant damage. For these reasons, open-loop V/f control could be a winning solution, since it avoids resonances and oscillations caused by measurement feedbacks in the control. However, instability may arise also in open-loop V/f control. A stability analysis is here carried out analytically and a new method to overcome oscillations by varying dynamically the V/f ratio is proposed. The stability analysis and the effectiveness of the proposed method are verified with simulation results on a 2.8kV-7.25MW induction motor and with experimental tests on a small-scale 380V-10 kW motor.

Stability Issues in V/f Controlled Medium Voltage Induction Motor Drives Considering Magnetizing Inductance Variation

S. Cosso;K. Kumar;M. Marchesoni;M. Passalacqua;L. Vaccaro
2023-01-01

Abstract

In this paper, a V/f control for high-power induction motor drives is analysed. In such uses, low dynamics in terms of speed-loop bandwidth is usually required. However, in some applications, where the load consists of a long shaft with certain mechanical components and with some resonant frequencies, instability and torque oscillations can cause significant damage. For these reasons, open-loop V/f control could be a winning solution, since it avoids resonances and oscillations caused by measurement feedbacks in the control. However, instability may arise also in open-loop V/f control. A stability analysis is here carried out analytically and a new method to overcome oscillations by varying dynamically the V/f ratio is proposed. The stability analysis and the effectiveness of the proposed method are verified with simulation results on a 2.8kV-7.25MW induction motor and with experimental tests on a small-scale 380V-10 kW motor.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/1140715
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact