American Superconductor Corp.
announced that its prototype 5- megawatt (MW) High Temperature Superconductor (HTS) ship propulsion motor has been demonstrated successfully at full load, under steady state operational conditions, at the Center for Advanced Power Systems (CAPS) at Florida State University in Tallahassee.
The motor was developed under contract with the U.S. Navy's Office of Naval Research (ONR) to prove the viability of HTS technology for both military and commercial marine propulsion.
After the 5-MW motor completes load and ship mission profile simulation tests at CAPS, it will undergo additional performance testing at the Naval Surface Warfare Center. Carderock Division in Philadelphia. The Navy will then define further land-based and at-sea testing for this motor.
"We continue to be pleased with these new test results on the 5-MW superconductor motor," said Rear Admiral Jay Cohen. Chief of Naval Research. "The HTS ship propulsion motors we have been developing continue to perform above our expectations and are providing an important new option for future Navy propulsion systems." HTS motors are ultra-compact, measuring as little as one-third the weight and one-half the size of copper-based motors of the same power and torque rating, which means Navy ships can carry more fuel and munitions and have more room for crew's quarters and weapons systems, and commercial ship owners and operators can carry more passengers and cargo.
Technical Background Significantly, the HTS motors being developed by AMSC involve no major changes in fundamental motor technology.
The machines operate in the same manner as conventional motors, gaining their substantial advantages by replacing copper rotor coils with HTS rotor coils.
The rotors of HTS motors run "cold," so they avoid the thermal stresses experienced by conventional machines during normal operation. The inability to achieve proper thermal management has been a key impediment in developing power dense, high torque motors required for naval and commercial marine applications.
AMSC's 5-MW (6,667 shp) HTS propulsion motor rotates at 230 rpm and generates 200,000 Newton-meters of torque at full power. This power and speed rating are typical for copper-based electric propulsion motors currently used in ferries and small cargo ships around the world. This class of superconductor motor also is expected to become a standard power rating for certain military ships.
The 5-MW HTS motor is a subscale version of the 36.5-MW (49,000 hp), 120 rpm HTS motor currently being built by AMSC and Northrop Grumman under a $70M three-year contract from ONR. The 36.5-MW motor, which will produce 2.9 million Newton-meters of torque, is due to go through a Detailed Design Review with the Navy in October - the next major step in its development. Scheduled to be delivered in the spring of 2006. the 36.5-MW motor is being specifically designed to provide propulsion power for the next generation of Navy warships. A motor of this scale also has direct commercial application in large cruise ships and merchant vessels. As an example, two 44-MW conventional motors are used to propel the famous Queen Elizabeth 2 cruise ship. These motors each weigh over 400 metric tons: the 36.5-MW HTS motor will weigh approximately 75 metric tons. Newer vessels, such as the QE2's sister ship Queen Mary 2, which sailed on her maiden voyage in January 2004 and has a total propulsion requirement of 84-MW. are ideal candidates for HTS motors.
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of Florida Shipper Magazine and has served as an adjunct professor of communications at Florida International University. Eyerdam graduated from Florida State University with a double major in English Literature and Government. His articles have appeared in myriad maritime publications. As first published in
also held positions in operations, special projects, labor relations and subsidiary management. In 1980, he was appointed assistant vice president of Florida Towing Co., and in 1982 he became vice president and general manager. Moran's Jacksonville operating company has since been renamed Moran Towing
Marine Lines in 1971 to work in the sales department at the New York office. A graduate of Georgetown University, he was appointed vice president of Florida Towing Company in Jacksonville when that firm was acquired by Moran in 1976. He returned to New York in 1983 to become manager of Moran's Barge
repair, machine shop, welding and fabrication facility, has completed the fabrication and assembly of the first Swirling Flow Research Combustor for Florida Atlantic University. This stainless steel combustor will determine the effects of swirling air flow on a combustion process such as fuel-air mixing
Magazine. Additionally, he was Executive Director of the Miami River Marine Group and Captain of the Port of the Miami River. He is a graduate of Florida State University with majors in English and Government. His articles have appeared in myriad shipping magazines and newspapers since 1970.This article first
. Turning to corporate finance, Mr. Moran was appointed assistant vice president of finance in 1973. With Moran's acquisition of the Florida Towing Company in 1976, he was named vice president and general manager of the Jacksonville, Fla., firm. In 1981, Governor Bob Graham of Florida
are made available by SNAME at Massachusetts Institute of Technology, University of Michigan, State University of New York Maritime College, and Florida Atlantic University. Grantsin- aid are also available at the University of California at Berkeley. In addition, Webb Institute of Naval Architecture
The Southeast Section of The Society of Naval Architects and Marine Engineers inducted the newly formed Student Section from the Florida Institute of Technology, Melbourne, Fla., into SNAME at a recent section meeting. This is the second official student section to be established in the Southeast
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