Effective generalized predictive control of induction motor

Patxi Alkorta; José A Cortajarena; Oscar Barambones; Francisco J Maseda

doi:10.1016/j.isatra.2020.04.008

Effective generalized predictive control of induction motor

ISA Trans. 2020 Aug:103:295-305. doi: 10.1016/j.isatra.2020.04.008. Epub 2020 Apr 27.

Authors

Patxi Alkorta¹, José A Cortajarena², Oscar Barambones³, Francisco J Maseda⁴

Affiliations

¹ Engineering School of Gipuzkoa, University of the Basque Country (UPV/EHU), Otaola 29, 20600 Eibar, Spain. Electronic address: patxi.alkorta@ehu.eus.
² Engineering School of Gipuzkoa, University of the Basque Country (UPV/EHU), Otaola 29, 20600 Eibar, Spain. Electronic address: josean.cortajarena@ehu.eus.
³ Engineering School of Vitoria, University of the Basque Country (UPV/EHU), Nieves Cano 12, 01006 Vitoria, Spain. Electronic address: oscar.barambones@ehu.eus.
⁴ Engineering School of Bilbao, University of the Basque Country (UPV/EHU), Rafael Moreno 3, 48013 Bilbao, Spain. Electronic address: fcjavier.maseda@ehu.eus.

PMID: 32381265
DOI: 10.1016/j.isatra.2020.04.008

Abstract

In this document it is presented and experimentally validated a new linear predictive regulator to control the mechanical speed and the rotor flux of induction motor (IM). The regulator is developed in the synchronous reference frame and it provides a very good dynamic performance and guarantees fulfilment with the current constraints, to avoid over currents in stator windings. This predictive controller employs the minimum necessary dynamic model of the motor to get minor computational cost, in which the rotor flux and the load torque are estimated, and in spite of important parametric uncertainties, the performance is excellent. Moreover, the predictive regulator anticipates the response and compensates the mechanical dead time of the speed induction motor drive, getting better results than the classic speed PI control scheme. This control scheme incorporates the space vector pulse width modulation (SVPWM) with two proportional-integral (PI) current controllers, where the rest of dynamics of motor (stator) is controlled and voltage constraints are implemented, ensuring that the modulator always works in the linear area, to prevent distortion in the resulting stator currents. From the experimental tests that have been carried out, it can be concluded that the presented controller provides an effective and robust mechanical velocity and rotor flux tracking, from low to high speed range, with a high accuracy.

Keywords: Current and voltage constraints; Generalized predictive control (GPC); Indirect vector control; Induction motor; Speed and rotor flux control.