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Title: The design and control of a superconducting motor
Author: Jiang, Y.
Awarding Body: University of Cambridge
Current Institution: University of Cambridge
Date of Award: 2009
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Abstract:
A superconducting machine is an ideal device for power generation, ship propulsion, and electric vehicles, for it would be many times smaller, lighter, and more efficient than an equivalent copper wound motor. The aim of this dissertation is to propose a design of a wholly superconducting motor with HTS tapes in the stator and HTS pucks on the rotor. Both the HTS stator windings and the magnetisation process of the HTS rotor have been modelled by implementing the critical state models using finite element method. Those models are based on a set of Maxwell’s equations incorporated with the E-J constitutive law. In addition, the AC losses of the stator windings were estimated. Due to the irregular field distribution from the magnetised rotor, the AC losses are too high for machine operation. Iron is used surrounding the windings to regulate the rotor field, so that the AC losses are largely reduced. A model based on an electromagnetic module was used to identify the machine parameters, such as self and mutual inductances. Experiments were carried out to measure the critical current of the stator winding. Additionally, the equivalent stator resistance was estimated based on the AC losses in the stator windings.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.605600  DOI: Not available
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