| Title |
Design of Lightning Surge Protective Device to Protect Military Radar Systems |
| DOI |
https://doi.org/10.5573/ieie.2023.60.10.84 |
| Keywords |
SPD(Surge Protective Device); Lightning protection; Military radar system |
| Abstract |
This paper proposes a new surge protective device that is installed at the output side of an inverter applied to military radar systems to protect the inverter and radar system from lightning strikes. Generally, inverters used in low-voltage distribution systems is installed surge protective devices on the input side, but military radar systems, the inverter and motor are physically separated. When a lightning strike invades the structure, the cables connected to the inverter and motor are influenced by the induced effects of lightning currents. Consequently, due to these structural characteristics, surge protective devices are also required at the output side. Additionally, while the power frequency of low-voltage distribution systems is 60Hz, the output frequency of the inverter is in the range of several kHz due to Pulse Width Modulation (PWM) control. Thus, the output frequency of the inverter is one of the crucial factors to consider when designing and implementing surge protective devices. In this study, we designed new surge protective devices capable of effectively operating under such high-frequency environment and analyzed their operational characteristics such as residual voltage and leakage current. The results of this study are expected to provide valuable information for designing and selecting surge protective devices under similar conditions. |