Capaldi, Bernard (1973) The theory and performance of A.C. axial flux machines. PhD thesis, University of Warwick.

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Abstract

The work reported in this thesis is concerned with the design,
testing and manufacture of a disc machine in order to compaxe its power
to weight ratio with conventional (radial) machines. In the former
machine the active current carrying conductors are radially positioned
while the useful airgap flux is parallel to the rotor shaft. Both the
squirrel cage induction motor and reluctance motor are covered.
The airgap flux is obtained directly from the product of the airgap
permeance and the airgap m. m. f. The errors involved in using the
permeance wave concept is assessed for the reluctance motor by comparing
fundamental and harmonic components in the airgap flux waveform obtained
using permeance waves with that obtained from conformal transformation
techniques. An equation is determined that can be used for calculating
the magnitude of the ma imum inertia that can be synchronised by the
reluctance motor for the practical range of polearc/pole pitch ratios.
It is shown that both machines have a potential power/weight ratio
of twice that of the radial machine. For the induction motor and
reluctance motor maximum outputs of 1260 watts and 1100 watts were
obtained respectively in a frame size of 220 mm O/D and 110 mm long. The
limitations of the prototype machines are discussed and the relationship
between the reluctance motor performance and the principal machine
parameters is obtained.

Item Type:	Thesis (PhD)
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Library of Congress Subject Headings (LCSH):	Electric machinery -- Alternating current
Official Date:	October 1973
Dates:	Date Event October 1973 Submitted
Institution:	University of Warwick
Theses Department:	School of Engineering
Thesis Type:	PhD
Publication Status:	Unpublished
Supervisor(s)/Advisor:	Corbett, A. E.
Sponsors:	Science Research Council (Great Britain) (SRC)
Extent:	viii, 166 leaves
Language:	eng

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