Electrical Propulsion System for Aviation – Experimental Validation of Efficiency Improvements

This paper deals with electrical propulsion system for light airplane or paraglider. The electrical drive consists of electrical motor, frequency converter and the batterypack. Electrical motor used in a light paraglider was designed as a permanent magnet synchronous motor (PMSM) in the Research and Development Centre of Electrical Machines KOMEL, Poland. Parameters of the motor, frequency converter and battery pack were shown. In this article, an influence of different propellers (1 fixed, 2 adjustable) and results of laboratory test was described. For increasing the efficiency of the electric propulsion, influence of switching frequency of the converter were tested and presented. The results of laboratory test were discussed.