Advanced designs for the next generation of electromagnetic actuators

This dissertation refers to original features for designing the future generation of electromagnetic actuators in technologies to be implemented and used in industrial systems well into the next century.;The first feature is represented by the method of premagnetization. In this study, this method is applied as a generalized method of affecting the global conversion cycle for the electromagnet, linear or rotational, for improving the total electromechanical energy converted. It takes advantage of the nonlinearity of ferromagnetic material, augments the range of parameters of state, and consequently increases the area of one conversion cycle.;The second feature is the sensorless control method which replaces a concrete position sensor or a position sensor system with an intelligent process which characterizes implicitly the sensing process and thus substitutes for the sensor itself.;The electromagnets which are simple, reliable, and inexpensive, when equipped with sensorless control will be capable of performing complex duties and will replace a series of expensive devices, which are also difficult to be manufactured and maintained.;An experimental chapter reinforces the theoretical and computational work developed in the second part of this work.;The idea of a fusion of the principle of electromagnetic actuators---as simple devices work with the other principle of magnetic amplifiers in the light of premagnetization and sensorless control is listed at the end of this research as leading to new actuators of increased complexity but achieving a higher payoff.;In the light of some importance to the issues related to the design of high performance actuators, the chapters on thermal analysis, optimization process, and an integrated approach for numerical calculations together with the source codes developed by the author for this study are listed in the appendix section.