Analysis and Design of Electromagnetic Compatibility Techniques for Unmanned Aerial Vehicle Power in Aeromagnetic Survey

Abstract—The reason why the measurement precision of the aeromagnetic data cannot be as high as that of the aeromagnetic instruments is due to the level of magnetic interference of an unmanned aerial vehicle. Through the analysis of electromagnetic interference sources of unmanned aerial vehicles and the working characteristics of optical pumping magnetometers, this article intends to optimize the switch mode power supply circuit. Ripple coefficient of output voltage is reduced to 0.2%, the magnitude spectrum of the near-field radiation is decreased by 10 dB and the conduction emission is below 20 dB. The electromagnetic compatibility of unmanned aerial vehicle equipment and the measurement precision of the optical pumping magnetometers are greatly improved.

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