ABSTRACT
Electromagnetic field theory has innumerable practical applications. The terms resistance, inductance, capacitance, conductance, potential, power, energy, force and torque emanate from the field concepts. The involvement of its concepts is imminent in all electrical and electronic devices and systems and the literature about most of these is available in abundance. The area of electrical machines is also deeply related to the electromagnetic field theory but has not yet been addressed to the level of satisfaction. One of the likely reasons for this neglect is that the field theory is presumed to be very conceptual with the general notion that it cannot be easily grasped without deep insight. It is further presumed that the field theory leads to complicated mathematical expressions, which create a sort of repulsive effect in the mind of the reader. In fact these myths are more psychological than real. The involvement of such mathematical expressions is quite common in other fields of science and engineering. Besides, the easy availability of design software based on numerical techniques has provided an excuse to those who want to avoid field concepts, mathematical complexities, and significant inaccuracies.
