Simulace vybraných metod galvanického oddělení v prostředí PSpice

Abstract

This bachelor’s thesis deals with a comparison of three methods for galvanic isolation of signals using both nonlinear and linear optocouplers as well as isolation transformers. In the OrCAD/PSpice environment, parameterized models were created for each method, enabling advanced transient, frequency-domain, and DC analyses. The results show that nonlinear phototransistor optocouplers are particularly suitable for transmitting digital pulses; linear, feedback-controlled optocouplers allow precise galvanic isolation of analog quantities; and transformers offer the widest transmission bandwidth, the effective use of which depends on the quality of the magnetic coupling and the parasitic parameters of the windings. As part of the work, a library of reference models was developed to demonstrate the selected galvanic isolation methods and to facilitate the design of reliable electronic circuits.