An Open-end Winding approach to the design of multi-motor drives exploiting multi-level inverters is presented in this paper. A key feature of the proposed approach is that a single multi-level inverter is tasked to provide the entire active power required by the system, while a two-level inverter acts as a power filter, providing a zero average active power. Moreover, a staircase voltage modulation technique is adopted on the multi-level inverter in order to minimize the switching losses, while the two-level inverter is PWM operated to accurately shape the motor currents. The proposed solution produces a much lower stator current distortion if compared to a conventional MLI switching at the fundamental frequency, while it requires less power switches and generates lower power losses than a PWM multi-level inverter featuring the same THD. Experimental results obtained on Multiple Motor Single Converter and Multiple Motor Multiple Converter systems are provided in order to confirm the consistence of the proposed approach in terms of efficiency maximization and motor voltage THD minimization.

An open-end winding approach to the design of multi-level multi-motor drives

FOTI, Salvatore;TESTA, Antonio;DE CARO, Salvatore;SCIMONE, Tommaso
2016-01-01

Abstract

An Open-end Winding approach to the design of multi-motor drives exploiting multi-level inverters is presented in this paper. A key feature of the proposed approach is that a single multi-level inverter is tasked to provide the entire active power required by the system, while a two-level inverter acts as a power filter, providing a zero average active power. Moreover, a staircase voltage modulation technique is adopted on the multi-level inverter in order to minimize the switching losses, while the two-level inverter is PWM operated to accurately shape the motor currents. The proposed solution produces a much lower stator current distortion if compared to a conventional MLI switching at the fundamental frequency, while it requires less power switches and generates lower power losses than a PWM multi-level inverter featuring the same THD. Experimental results obtained on Multiple Motor Single Converter and Multiple Motor Multiple Converter systems are provided in order to confirm the consistence of the proposed approach in terms of efficiency maximization and motor voltage THD minimization.
2016
9781509034741
9781509034741
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

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/11570/3104637
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 15
  • ???jsp.display-item.citation.isi??? 11
social impact