Electromagnetic compatibility analysis of DC-DC surge suppression circuit for star sensor

The paper is introducing the surge suppression circuit of a star sensors briefly. According to the design methods existing of surge suppression circuit, a component parameter analysis and calculation method with the best circuit performance is proposed.Starting with the stable realization of the circuit function and the electromagnetic compatibility of the circuit, this paper analyzes the selection and analysis of the key devices in the surge suppression circuit. Through theoretical analysis and experimental simulation,it is proved that the device selection obtained by the compatibility analysis idea proposed in this paper is effective and correct under the given design conditions. At the same time, it provides a reference for the surge suppression design of other subsystems, so as to improve the reliability of the whole on-board electronic equipment.

The traditional surge current design method originates from the engineering experience of designers, using soft start circuits to suppress surge circuits has a significant effect. However, while slowing down surge currents, it also introduces secondary surge currents. After experimental analysis, it can be concluded that the parameters of key components in surge suppression circuits can be determined through a combination of theory and practice. The compatibility of the entire circuit structure can be comprehensively considered, and the approximate range can be determined based on experience, and the optimal value can be solved through mathematical methods.