Simulation and Test Verification of Low Frequency Magnetic Field Distribution Characteristics of Ship Equipment

With the development of power electronics technology the power of ship-borne equipment is getting bigger and bigger, and the low-frequency electromagnetic field of the equipment begins to interfere with the normal use of sensitive equipment on board. The research on the propagation and distribution characteristics of low-frequency electromagnetic fields has become more and more urgent. In this paper, a low-frequency magnetic field distribution simulation method of equipment is proposed for a typical high-power equipment of ships. Through the simulation of finite elements, the simulation model of typical equipment is established, and the distribution characteristics of the low frequency magnetic field of the equipment are obtained by a multi-media model. A low-frequency magnetic field test system based on the fluxgate sensor is also established to verify the simulation results. Through testing, the spatial magnetic field distribution of permanent magnetic propulsion motor in different operating states is obtained. Compared with the simulation data, the error is less than 5dB, which verifies the accuracy of the simulation method.