Modelling and optimization of a permanent-magnet machine in a flywheel

Title

Modelling and optimization of a permanent-magnet machine in a flywheel

 Author

Holm, S.R.

Contributor

Ferreira, J.A. (promotor)

Faculty

Information Technology and Systems

 Date

2003-11-20

 Abstract

This thesis describes the derivation of an analytical model for the design and optimization of a permanent-magnet machine for use in an energy storage flywheel. A prototype of this flywheel is to be used as the peak-power unit in a hybrid electric city bus. The thesis starts by showing the feasibility of using a flywheel energy storage system for this application, as opposed to other energy storage technologies. It then continues by describing a prototype flywheel system and the required electrical machine: a radial-flux external-rotor permanent-magnet synchronous machine without slots in the stator iron and with a shielding cylinder. An analytical model for the machine is derived, based on 2D electromagnetic field calculations, including the reaction field of the eddy currents in the shielding cylinder. Torque and losses are calculated by means of the Theorem of Poynting and the Lorentz force. Such a machine was built and the analytical model has been validated by experimental measurements. Lastly, the thesis suggests and implements a machine optimization algorithm.

 Subject

permanent-magnet machine
pmsm machine
analytical modelling
flywheel
energy storage technologies

 To reference this document use:

http://resolver.tudelft.nl/uuid:25aea2bb-cd25-499f-9fe6-8de69462e49d

 Publisher

S.R. Holm

 ISBN

90-9017297-1

 Part of collection

Institutional Repository

 Document type

doctoral thesis

 Rights

(c) 2003 S.R. Holm
Files
PDF its_holm_20031120.pdf 3.01 MB
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