ETD

Archivio digitale delle tesi discusse presso l'Università di Pisa

Tesi etd-05112015-154246


Tipo di tesi
Tesi di laurea magistrale
Autore
MARFOLI, ALESSANDRO
Indirizzo email
alessandro.marfoli@gmail.com
URN
etd-05112015-154246
Titolo
Modeling, analysis and design optimization of a permanent magnet assisted synchronous reluctance machine
Dipartimento
INGEGNERIA DELL'ENERGIA, DEI SISTEMI, DEL TERRITORIO E DELLE COSTRUZIONI
Corso di studi
INGEGNERIA ELETTRICA
Relatori
relatore Prof. Bolognesi, Paolo
tutor Ing. Gerada, Christopher
Parole chiave
  • fractional slot
  • toroidal winding
  • torque ripple
Data inizio appello
15/06/2015
Consultabilità
Completa
Riassunto
ABSTRACT
This Master Thesis deals with the electromagnetic and thermal performance of a permanent magnet assisted synchronous reluctance machine for traction application, carrying out a comparison between two windings configuration and between two technics for torque ripple reduction.
In the first chapter, an excursus about the kinds of electrical machines and their application areas is presented.
In the second chapter, the mathematical model and the main features of an IPM motor are presented. The capability curves and the circle diagram are introduced to better describe the IPM performances; at the end the concept of the interaction between the model parameters and the saturation effects and cross saturation in a real machine are shown. In addition a brief introduction to FEM analysis is presented.
In the third chapter, the electro-magnetic performance of the reference machine are presented.
In the fourth chapter a preliminary comparison between toroidal windings configuration and distributed windings configuration in terms of electromagnetic performance is presented. At the chapter end an efficiency comparison for different motor dimensions is presented.
In the fifth chapter, the thermal problem for electrical machine is introduced and the main heat removal equations are presented. The equivalent lumped parameters thermal circuits for each windings topology are modeled with the purpose to continue the comparison in terms of thermal performance defining the toroidal winding advantages and drawbacks for different motor dimensions.
In the sixth chapter, two reduction technics of ripple torque are introduced. The purpose is find a way that permit to reduce the torque ripple without worsen the performance. Fractional slot windings and a new rotor design are introduced and FEM analysis provide and validate the torque ripple results.


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