Computational Comparison of AC and DC Motors to Hydrodynamic Changes in Marine Fishing Vessels

The objective of this article is to make a comparison in computational environment between an alternating current motor and direct made for dynamic variations the propulsion artisanal fishing boat. Initially, boat was simulated Maxsurf software obtain behaviors pitching, rolling, yawing, heave motions with wind wave perturbations Pierson Moskowitz spectrum. Subsequently, motors are selected Matlab/Simulink torque behavior required by vessel act on resistance presented each motion proposed. This allows analyzing mechanical electrical conditions, using curves obtained simulation. Finally, it concluded that taking into account criteria torque, power, speed, current, results show DC more efficient than three-phase AC applications. In addition, two require greater effort overcome disturbance related rolling steady-state, while transient state requires higher starting presents oscillations, which undesirable disturbances because they produce instability system. Additionally, important take energy source feeds motors, can be or current.