The single-phase induction motor:a critical appraisal of the rotating-field and cross-field theories with particular reference to skin effect

Jevons, M.J. (1966). The single-phase induction motor:a critical appraisal of the rotating-field and cross-field theories with particular reference to skin effect. PHD thesis, Aston University.

Abstract

The purpose of this thesis is twofold: to examine the validity of the rotating-field and cross-field theories of the single-phase induction motor when applied to a cage rotor machine; and to examine the extent to which skin effect is likely to modify the characteristics of a cage rotor machine. A mathematical analysis is presented for a single-phase induction motor in which the rotor parameters are modified by skin effect. Although this is based on the usual type of ideal machine, a new form of model rotor allows approximations for skin effect phenomena to be included as an integral part of the analysis. Performance equations appropriate to the rotating-field and cross-field theories are deduced, and the corresponding explanations for the steady-state mode of operation are critically examined. The evaluation of the winding currents and developed torque is simplified by the introduction of new dimensionless factors which are functions of the resistance/reactance ratios of the rotor and the speed. Tables of the factors are included for selected numerical values of the parameter ratios, and these are used to deduce typical operating characteristics for both cage and wound rotor machines. It is shown that a qualitative explanation of the mode of operation of a cage rotor machine is obtained from either theory; but the operating characteristics must be deduced from the performance equations of the rotating-field theory, because of the restrictions on the values of the rotor parameters imposed by skin effect.

Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Additional Information: Department; Electrical Engineering His book entitled 'Electrical machine theory' is kept in store with this thesis If you have discovered material in Aston Research Explorer which is unlawful e.g. breaches copyright, (either theirs or that of a third party) or any other law, including but not limited to those relating to patent, trademark, confidentiality, data protection, obscenity, defamation, libel, then please read our Takedown Policy and contact the service immediately.
Institution: Aston University
Uncontrolled Keywords: electrical engineering,single-phase induction,rotating-field theory,cross-field theory,skin effect
Completed Date: 1966-11
Authors: Jevons, M.J.

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