RT Dissertation/Thesis
T1 Enhancement in thermal monitoring and fault tolerance in multiphase electric drives
T2 Mejoras en la monitorización térmica y en la tolerancia a faltas en accionamientos eléctricos polifásicos
A1 Baneira Collazo, Fernando
K1 3307 Tecnología Electrónica
K1 3306 Ingeniería y Tecnología Eléctricas
K1 3305 Tecnología de la Construcción
AB The use of multiphase AC electric machines together with multiphase power converters has been recognize as a viable approach to obtain higher power ranges without increase the current per phase. The greater degrees of freedom of a multiphase machine compared with a three-phase one can be exploited in different manners.Regarding three-phase machines, several strategies have been proposed for thermal monitoring  based on dc-signal injection. However, due to such injection, a certain torque ripple is produced. In this dissertation, the additional degrees of freedom available in multiphase drives for condition monitoring are exploited to develop an algorithm based  on dc-signal injection that enables the drive to estimate online the stator winding temperature avoiding the production of torque ripple.On the other hand, the greater degrees of freedom can also be used to increase the fault tolerant capability of the motor drive. This characteristic is crucial in applications that require a high degree of reliability, such aerospace of marine applications.In this maner, as far as the post-fault control strategies is concerned, the existing ones do not minimize the stator winding losses in the whole torque operation range (TOR).  Thus, another objective of this thesis is to develop optimized post-fault strategies that improve the performance of  the previous ones in this regard.  In addition to the stator winding losses, the converter ones  also play an important role in the whole drive. Therefore, it is also of interest to compare  the different post-fault methods in terms of converter losses, which has not been taken into account  in the past in this context in spite of its importance.
YR 2019
FD 2019-01-08
LK http://hdl.handle.net/11093/1109
UL http://hdl.handle.net/11093/1109
LA eng
DS Investigo
RD 13-sep-2024