Performance improvement of switched reluctance motors through advanced control strategies
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Date
2021-09-21Primeiro coorientador
Vieira, Rodrigo Padilha
Primeiro membro da banca
Callegaro, Alan Dorneles
Segundo membro da banca
Baratieri, Cássio Luciano
Terceiro membro da banca
Pinheiro, Humberto
Quarto membro da banca
Barros, Tárcio André dos Santos
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This thesis presents contributions in the field of advanced control strategies for
SRMs. These techniques seek to improve the performance of SRMs, specially regarding
torque ripple minimization, aiming to mitigate a known drawback of the machine.
Firstly, a SRM firing angle optimization procedure based on the particle swarm optimization
algorithm is proposed. The procedure is intended for SRMs operating in the current
controlled region, below base speed, and seeks a balance between energy efficiency and
reduced torque ripple. As a second contribution, a discrete-time super-twisting sliding
mode current control scheme for switched reluctance motors is proposed. The proposed
method presents enhanced current tracking capabilities, enabling lower torque ripple in
SRM drives operating with TSF strategies. The strategy ensures a fixed switching frequency
due to PWM implementation and presents a novel gain design procedure, using a
cost function. This enables a systematic and straightforward way to determine the controller
gains. The procedure is repeated for different speed values, allowing for a variable
gain structure, where the controller gains are adjusted online based on the rotor speed.
Simulation and experimental results are provided in order to demonstrate the effectiveness
of the proposed control schemes.
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