2021 年 29 巻 2 号 p. 257-262
In recent years, various types of energy are consumed every day around the world, and among them, the proportion of fossil fuels is high. For this reason, renewable energy that does not have to be depleted has attracted attention, and various R & D activities have been conducted. Among renewable energies, research on solar cells is being actively conducted, and silicon solar cells (hereinafter PV modules) are the most widely used. However, it has been reported that the noise radiated from the PV module interferes with the AM radio band (526.5 - 1606.5 kHz). In addition, the radiated noise tends to increase as the PV module area increases. Therefore, our laboratory is studying a method to reduce the noise radiated from the PV module surface. In previous study, it was found that a noise suppression method using electromagnetic induction by installing a suppression wire on the back of a PV module was effective. However, in a high-frequency environment, a skin effect occurs, and the resistance value increases, which may hinder noise suppression. Therefore, in this study, the litz wire was examined as a new suppression wire to improve the suppression rate.