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Lumped Parameter and Circuit Models of Electromechanical Switching Device Electromagnet
(Technischen Universität Graz, Austria, 2020) Bajda, Yevgen I.; Clemens, Markus; Pantelyat, Michael G.; Korol, Olena G.
Forced DC electromagnets are widely used in modern electromechanical switching devices. In cases, where the total costs of simulation of high-fidelity electromagnetic field's 3D and even 2D models are unacceptably high, alternative techniques based on lumped parameters and magnetic circuit models of switching device electromagnets can be used. The paper presents a technique for calculating the dynamics of forced DC electromagnets using the Maple code as an example of simulation of the magnetic circuit of an electromagnet used in vacuum contactors.
Searching for Optimal Control Parameters of Thermal Object Using Pulse-Width Modulation (PWM) Control with Predictive Filter
(Lviv Polytechnic Publishing House, 2015) Yevseienko, Oleg; Gapon, Anatoliy; Salnikov, Dmytro
The thesis is devote to the temperature control of objects with lumped or distributed parameters. The problems of choosing the right value of regulator’s heater power and prediction period are discussed. The major attention is paid to the process of searching the minimum value of control quantities. It is shown that the approximated second-order plane has an exact accordance with the original data. It is concluded that algorithm of PWM-control with prediction filter provides good quality control.