ANALYSIS OF ASYNCHRONOUS TRIPHASE ELECTRIC MOTORS USED IN AC PROPULSION SYSTEMS

Seen from the perspective of electromechanics, propulsive engines can be asynchronous, synchronous and synchronous - asynchronous, can have low rotation frequencies for direct coupling to the screw shaft, whereas at high rotation frequencies the coupling is performed through a reducer. With respect to asynchronous engines used in the electrical propulsion of ships, several features have been subject to our close examination: the moment when sliding, the mechanical characteristic between motor speed and coupling as well as between coupling and sliding in accordance with the rotor speed, and finally the coupling characteristics of asynchronous engines and the related mechanisms.