Controle de máquina de relutância variável em situações de falta de fase

Detalhes bibliográficos
Ano de defesa: 2017
Autor(a) principal: Silva, Wellington Assunção da
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Não Informado pela instituição
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://www.repositorio.ufc.br/handle/riufc/27100
Resumo: Many applications which make use of electric machines require non-interruption operation, even in the presence of faults. Within this context, phase faults are obviously undesired, as may lead the machine to stop operating, or, at least, it reduces the performance of thesystem. Under fault scenarios the performance of the system is expected to degrade and control techniques may be helpful to overcome this issue. Switched Reluctance Machines (SRM), due its inherit characteristics, are naturally tolerant to phase faults, despite of the loss of performance. Most of the techniques used to improve the performance of SRMs in fault situations are related to the switching feed converter or in the machine design itself. Regarding this issue, instead of presenting an alternative converter topology, this work alternatively proposes a control approach which significantly reduces the phase faults effects on the speed of the motor. Furthermore, the high frequency noise is attenuated en compared to the classical proportional integral (PI) controller, commonly applied to control such sort of motors. The proposed switched reluctance adaptive feedforward controller (SRM-AFC) is based in compensation functions identified by means of several tests when the system was submitted to one and two faults. The proposed methodology is able to recover the speed of operation faster than a classical approach, when a feedforward action is not taken into account.