Internal Thermal Analysis of Electric Machines
Typ
Examensarbete för masterexamen
Program
Automotive engineering (MPAUT), MSc
Publicerad
2019
Författare
Jayanath Vivek, Anthony
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Electric machine thermal modelling using 3D Computational Fluid Dynamic (CFD)
simulations, is a vital process in the design and verification of Lumped Parameter
Thermal Networks (LPN). In this thesis, the aim is to continue the CFD Modelling
of a Permanent Magnet Synchronous Motor, and further improve the existing LPN
model. This thesis is a continuation of the Master’s thesis “Electric motor internal
heat convection modelling and analysis” conducted by Anil Kumar during 2018. The
CFD model is built using a bottom-up approach where each significant region of the
motor (Ex: Air-gap, End windings, etc) is modelled and validated by similar models
from journals, empirical formulation, literature or experiments. The complete CFD
model is then validated against rig measurements. With this assertion, the CFD
model is then used to run steady state simulations for various load cases and operating
points to extract data. This data can be used as parameters in the LPN model,
or to calibrate the model itself. This way, the highly simplified 1-Dimensional LPN
model is verified by 2 or 3-Dimensional CFD simulations, which itself is validated
by literature and physical measurements. These 1D LPN, 2D models or 3D CFD
simulations can be applied in the future, for various different electric machines or
prototype models to analyze cooling strategies and performance.
Beskrivning
Ämne/nyckelord
Computational Fluid Dynamics , Electromagnetic , Electric Machine , PMSM , Rotor , Stator , End windings , Thermal , LPTN , Drive Cycle Analysis