Abstract
When using rotary aircraft equipped with three-axis magnetometer for measurement, the magnetometer is often affected by the leakage magnetic field from the permanent magnet synchronous motor (PMSM) on the aircraft. The analysis of the characteristics of the leakage magnetic field of PMSM is helpful for the determination of the installation position of the magnetometer and cancellation of the interference of the leakage magnetic field when measuring the external environment magnetic field. In this paper, a three-dimensional PMSM model has been simulated by using Comsol Multiphysics software, and the leakage magnetic field of the motor was investigated. According to the simulation results, we find that the phase of the leakage magnetic field varies linearly around the center of the motor in space, and the amplitude decays exponentially in different directions.
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