FCS-MPC-based current control of a five-phase induction motor and its comparison with PI-PWM control

Chee Shen Lim, Emil Levi, Martin Jones, Nasrudin Abd Rahim, Wooi Ping Hew

Research output: Contribution to journalArticlepeer-review

255 Citations (Scopus)

Abstract

This paper presents an investigation of the finite-control-set model predictive control (FCS-MPC) of a five-phase induction motor drive. Specifically, performance with regard to different selections of inverter switching states is investigated. The motor is operated under rotor flux orientation, and both flux/torque producing (d-q) and nonflux/torque producing (x-y) currents are included into the quadratic cost function. The performance is evaluated on the basis of the primary plane, secondary plane, and phase (average) current ripples, across the full inverter's linear operating region under constant flux-torque operation. A secondary plane current ripple weighting factor is added in the cost function, and its impact on all the studied schemes is evaluated. Guidelines for the best switching state set and weighting factor selections are thus established. All the considerations are accompanied with both simulation and experimental results, which are further compared with the steady-state and transient performance of a proportional-integral pulsewidth modulation (PI-PWM)-based current control scheme. While a better transient performance is obtained with FCS-MPC, steady-state performance is always superior with PI-PWM control. It is argued that this is inevitable in multiphase drives in general, due to the existence of nonflux/torque producing current components.

Original languageEnglish
Article number6469208
Pages (from-to)149-163
Number of pages15
JournalIEEE Transactions on Industrial Electronics
Volume61
Issue number1
DOIs
Publication statusPublished - 2014
Externally publishedYes

Keywords

  • Current control
  • model predictive control (MPC)
  • multiphase inverters
  • multiphase machines
  • weighting factor

Cite this