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The training tall ship Amerigo Vespucci is the masterpiece of the Italian Navy fleet. Counting about 80 years of service, its refitting was mandatory, due to severe critical issues in efficiency, sustainability, logistic management and operation safety. Taking advantage of the full renewal, an innovative propulsion system has been designed. In this paper the new power system configuration, the requirements,...
In this paper two possible design alternatives are investigated for a high-power synchronous motor propulsion drive employing two voltage-source inverters for motor supply. The two arrangements are compared based on their steady-state behavior in both normal and faulty conditions (i.e. with one out-of-service inverter), predicted by time-stepping finite-element simulations. Simulation results found...
In modern ships of large size, the main propulsion system, consisting of either an internal-combustion engine or an electric drive, is assisted by auxiliary propulsion equipment composed of thruster propellers, used for low-speed, transversal, docking and station-keeping maneuvers. Thruster motors are typically induction machines, connected to the on-board grid either directly or through autotransformer...
Electric propulsion for cruise liners has now become a standard owing to its several advantages. However propulsion drives have a large impact on the ship power system. This gives rise to the requirement for designers to understand in depth the effects of propulsion drives on the ship network in different operating conditions. For this purpose computer simulations have proved to be a very useful tool...
More and more commercial and pleasure modern ships are equipped with electric propulsion system, which is the most important and power-consuming electric apparatus onboard. The significant increase in the power required onboard by the adoption of electric propulsion causes a great evolution in onboard power systems and poses the need for a proper development of design techniques and tools. At the...
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