Magnetic voltage isolator for the feedback loop of power converters for space applications

Abstract

Optocouplers are among the components most adversely affected by space radiation, resulting in diminished performance and a shortened lifespan. This article presents a device, based on a current-fed Push-Pull topology DC/DC converter, designed to isolate the feedback loop signal of a power converter. Furthermore, a mathematical model has been developed, playing a pivotal role in the study. This model facilitates the identification of nonlinearities within the system, ensures precise knowledge of the current transfer ratio, and serves as a design guide to achieve accurate behavior. Python was utilized for evaluating the mathematical model, while PSIM was employed for assessing the system circuit, thus presenting experimental results as well.