LEAKAGE MAGNETIC FIELDS OF THE ELECTRIC BLDC MOTORS OF SMALL UAV

Josef Blažek

   Modern electric motors with permanent magnets and electric commutation (brushless DC - BLCD motor) have become the most useful in the power drive of the small UAV, RPAS or drones. The main interest of our project VEGA 1/0585/15 is to explore all possibilities of the drones' identification oncoming to the areas of interests. Within these projects were made indicative measurement of the electromagnetic energy radiation of the set of BLDC motors of different power drive and construction. In the initial part of the contribution the measurement methodology of ELF and LF leakage magnetic field by help of the four - channel digital magnetometer VEMA using data recording and subsequent mathematical and graphical processing of these data is solved. It has been shown that relevant results for the comparison of different motor such as spatial interpretation of their leakage magnetic fields brings the gradient method with determined xx and yx components of the magnetic field. Higher frequency components in the examined fields, mainly components given by PWM power drive motor regulation were measured by the magnetometer based on the induction principle.

Keywords: PV module, power performance, degradation, high voltage stress

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