Banca de DEFESA: RAFAEL BRUNO FERREIRA FIGUEIREDO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RAFAEL BRUNO FERREIRA FIGUEIREDO
DATE: 29/09/2022
TIME: 14:00
LOCAL: https://meet.google.com/xuf-onka-ipj
TITLE:

 Robust Modulated Model Predictive Control   Finite Set    Applied in the Control of Induction Machines

PAGES: 139
BIG AREA: Engenharias
AREA: Engenharia Elétrica
SUBÁREA: Eletrônica Industrial, Sistemas e Controles Eletrônicos
SPECIALTY: Eletrônica Industrial
SUMMARY:

 This dissertation starts with a theorical revision of induction machine drives, from scalar control
to indirect and direct field orientation methods. Then, introducts the concept of predictive control
and Finite Control Set (FCS) for power electronics. It describes the Predictive Torque control
(PTC) and Predictive Current Control (PCC) (based on deadbeat and feedfoward control for
parametric robustness) using the FCS scheme to eliminate modulation on output stage. It also
describes a Discrete Space Vector Modulation (DSVM) to be used with FCS controllers, were
more than one voltage vetor is applied in each sample time, and an adaptive flux estimator
intended to increase the parametric robustness of the controller in a wide speed range. A
delay compensation method (prediction in(k+ 2)) is analysed and experimentally tested. The
simulation and experimental results show a great dynamic response and very little steady state
error in current and speed control using PI. The DSVM results with three vectors shows a
reduction in current distortion and torque ripple for the same sampling frequency but shows
similar results when compared to a classical aproach with three times the sampling frequency.
The robust current control with indirect orientation maintened it’s performance for stator and
rotor resistance variations up to+300%in experimental results. With direct orientation using
the adaptive estimator the control performance start degraded at100%of resistances error, and
brought poor performance and increased current distortion in transient operation, evidencing that
Indirect orientation may be a better option with smaller computational burden and no impact in
the robustness of the controller up to 100% parametric variation in resistances

BANKING MEMBERS:
Presidente - Interno ao Programa - 1907748 - ALFEU JOAOZINHO SGUAREZI FILHO
Membro Titular - Examinador(a) Interno ao Programa - 2200473 - JOSE ALBERTO TORRICO ALTUNA
Membro Titular - Examinador(a) Externo ao Programa - 2328639 - ADEMIR PELIZARI
Membro Titular - Examinador(a) Externo à Instituição - NADY ROCHA - UFPB
Membro Suplente - Examinador(a) Interno ao Programa - 1876380 - THALES SOUSA
Membro Suplente - Examinador(a) Externo à Instituição - FABIANO FRAGOSO COSTA - UFBA