EPE Association: EPE-PEMC 2004 - Topic 14-3: Marine electrical drives

EPE-PEMC 2004 - Topic 14-3: Marine electrical drives
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2004 - Conference > EPE-PEMC 2004 - Topic 14: DRIVES IN TRANSPORT > EPE-PEMC 2004 - Topic 14-3: Marine electrical drives

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   Current Source Inverter Perturbations In An All Electric Ship
By Salvy Bourguet, Patrick Guerin, Rene Le Doeuff [View]
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Abstract: Current source inverters associated to rectifiers are used in variable speed drives for the propulsion system onboard ships. The complete structure will generate frequency perturbations in the entire supply system which could become undesirable. In a first part, the modulation theory is applied to the ideal structure of a converter. The design of the propulsion transformers and of the propulsion motor are considered in order to calculate the injected currents on both the sides of the converters. Finally, those results are confronted to experimental ones obtained onboard an electric ship. Those results show a complete validation of the theoretical predictions.

   Diesel-Electric Trawler Economy
By Niels Abildgaard [View]
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Abstract: Trawlers haul large nets at low speed and low propulsive efficiency. Combining two strategies presented in this paper can give a worthwhile reduction of fuel cost and CO2 emission. One strategy is to use a big propeller and two azimuth thrusters driven by electricity and the other is to develop a light dieselgenerator using cheap fuel for use on small ships. A novel engine- generator layout (Junkerator) is described and tests have shown that it works but the theory is not satisfactory. A cost-benefit analysis using known prices from an existing ship compared to some estimated prices for new equipment indicates that a higher investment can be balanced by fuel cost savings in less than two years.

EPE-PEMC 2004 - Topic 14-3: Marine electrical drives
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2004 - Conference > EPE-PEMC 2004 - Topic 14: DRIVES IN TRANSPORT > EPE-PEMC 2004 - Topic 14-3: Marine electrical drives
	[return to parent folder]

	Current Source Inverter Perturbations In An All Electric Ship By Salvy Bourguet, Patrick Guerin, Rene Le Doeuff	[View] [Download]
Abstract: Current source inverters associated to rectifiers are used in variable speed drives for the propulsion system onboard ships. The complete structure will generate frequency perturbations in the entire supply system which could become undesirable. In a first part, the modulation theory is applied to the ideal structure of a converter. The design of the propulsion transformers and of the propulsion motor are considered in order to calculate the injected currents on both the sides of the converters. Finally, those results are confronted to experimental ones obtained onboard an electric ship. Those results show a complete validation of the theoretical predictions.

	Diesel-Electric Trawler Economy By Niels Abildgaard	[View] [Download]
Abstract: Trawlers haul large nets at low speed and low propulsive efficiency. Combining two strategies presented in this paper can give a worthwhile reduction of fuel cost and CO2 emission. One strategy is to use a big propeller and two azimuth thrusters driven by electricity and the other is to develop a light dieselgenerator using cheap fuel for use on small ships. A novel engine- generator layout (Junkerator) is described and tests have shown that it works but the theory is not satisfactory. A cost-benefit analysis using known prices from an existing ship compared to some estimated prices for new equipment indicates that a higher investment can be balanced by fuel cost savings in less than two years.