ELECTROMAGNETIC PROCESSES WITH DIRECT EXCITATION OF SERIAL RESONANT CIRCUIT BY RECTANGULAR VOLTAGE PULSES

Abstract

Purpose. Obtaining the analytical amplitude-time dependencies of exited currents and numerical estimations of their characteristics with direct excitation of resonant sequential active-reactive circuit by periodic series of rectangular unipolar or oscillating voltage pulses.Methodology. The mathematical apparatus of the theory of electric circuit in transients calculations when connecting serial resonant circuits. Numerical estimations of the occurring electromagnetic processes characteristics.Findings. The amplitude-time forms of current in a series active-reactive circuit are determined during its resonant excitation by the periodic series of the rectangular unipolar or oscillating voltage pulses with a resonant repetition rate. Numerical estimates of the characteristics of the excited currents are performed. The somewhat higher efficiency of unipolar excitation of harmonic processes is noted in comparison with the excitation of periodic voltage pulses by oscillating sequences. It is shown that with an increase in the quality factor of the resonance circuit - Q, the contribution of the higher spectral components, regardless of the input voltage type, substantially decreases, and for Q >> 1 the excited current becomes strictly harmonic. Originality. The scientific novelty of the present work consists in obtaining analytical amplitude-time dependences and numerical estimates for the excited currents by directly connecting the anharmonic voltage source to a series resonant circuit and is initiated by practical tasks in the development of electrical devices, the real effectiveness of which is possible only under conditions close to resonant. Practical value. The obtained expressions for the currents excited by directly connecting the anharmonic voltage source to the series resonant active-reactive circuit, and the results of the analysis are necessary for the design of electrical devices with resonant components. It seems very promising in the direction of further research to solve the problem and analyze processes in a system of two inductively coupled series resonant circuits excited by a time sequence of anharmonic signals.