Diseño e implementación de un variador de velocidad para un motor de inducción trifásico de baja potencia utilizando control predictivo

Abstract

Themostcommonlyusedrotatory machine in industryisphaseinductionmotors. Typically, theseenginesrequire drivers to regulatetheir torque and speed. To acomplishthespeed control of thismachinery, a wellknown industrial controllercalled variable speed drive (VSD) isused. The most common VSD control algorithms are: pulse-width modulation (PWM), space vector modulation (SVM). Thisresearchproposesthedesign and implementation of a variable speed drive forthree-phaseinductionmotors of smallpowerbyusingpredictive control overthe load currents. The proposed design includes two stages: the power stage and the control stage. Thefirststagecomprises a rectifier, a capacitor and aninverter. Therectifierconverts AC to DC power. The capacitor isresponsibleforreducingtheripplevoltageafterrectification. Finally, theinverterconverts DC to AC powerthatfeedsthethree-phase motor. The second stage consists of a DSP TMS320F28335, which is responsible of executing a model predictive control algorithm (MPC). The MPC uses themodel of thesystem to predictthefuturebehavior of the control variables. In thisresearchconsiders a three-phaseinduction motor has beenconsidered as thesystem to be controlled, and thephasecurrents in the motor are the control variables.