A highly flexible numerical simulation model for the performance
prediction of brushless dc drives is presented, which is capable of
investigating unbalanced and asymmetrical operating conditions as well
as drives with non-ideal parameters. Numerical speed-up procedures
allow for the investigation of pulse-width modulated (PWM) drives using
a personal computer. Experimental...
The brushless doubly fed machine (BDFM), or self-cascade
single-frame machine, can operate asynchronously or
synchronously over a wide speed range. In this sense the
machine becomes an adjustable speed synchronous machine.
Such machines may become unstable in certain regions of
operation. Analyzing its steady-state performance and
determining its stable operating...
This thesis covers the efforts of the design, analysis,
characteristics, and construction of a Linear Brush less Doubly-Fed
Machine (LBDFM), as well as the results of the investigations and
comparison with its actual prototype.
In recent years, attempts to develop new means of high-speed,
efficient transportation have led to considerable...
The induction motor in its electromagnetic features
is essentially a transformer, while in its general behavior
it is analogous to the continuous-current shunt wound
motor. In a transformer the primary and secondary members
are both stationary and electrical energy is transformed
from one pressure to another by the ratio of...
Throughout the year the regular design work of the
class room proved so profitable that it was thought that
there was no subject which could be selected for thesis
purposes of greater benefit,or which offered as great a
latitude in the working out of the various problems, than
the one...
The following discussion is confined mostly to
that type of machine in which the squirrel care revolving
secondary it used. In its most primitive form it con -
listed simply of a disk- aramature as described by Baily
in 1870 and due to Tesla (1888), of the fact that two,...
The study, design, construction, operation and care
or synchronous machines forms one of the most important
branches of electrical engineering. The extent to which
they are now being used is a notable feature of recent
electric progress.
The term synchronous machines covers quite a field
and it might be well...
The problem of the economical transmission of power has long been a serious one to the engineer. Formerly the power had to be generated on or near the spot where it was to be used, but now the advance that has been made in Electrical Engineering has largely done away...
In order that the proper motor for a given service
may be chosen it becomes necessary to study and know
the requirements and characteristics of the machine which
may be used for that purpose. When these are known the
selection of that one which is best adapted for the use...