A high power density, high-torque electric motor of at least 36 megawatt will be available for use in the DD(X) destroyer or future cruisers on or before December 31, 2006. The claim will be judged true if a motor meeting the requirements for the DD(X) is delivered to the U.S. Navy for testing on or before the above date.
Background: The Navy wants to use integrated power systems to drive newer ships. Such systems generate electric power using some centralized generation system to power mission equipment and drive motors. The first DD(X) is scheduled for delivery in 2011. There are competing technologies developing high power density, high-torque electric motors. DRS Electric Power Technologies of Parsippany, NJ is using neodymium iron boron permanent magnets in the rotor. They are scheduled to deliver such a motor to the Navy Philadelphia Naval Surface Weapons Center in the summer of 2005. This will be the world’s largest permanent magnet electric motor. There are questions as to it having acceptable noise parameters. They have built a 5 megawatt unit. Almstom, a British firm, is building an “advanced induction motor”, but it may not have acceptable power density. American Superconductor of Westborough, MA is developing a motor with even greater power density that is scheduled for testing in 2006. They have built a 5 megawatt version currently being tested at Florida State University. General Atomics of San Diego, CA is developing a direct current superconducting homopolar motor that operates at a colder temperature than the American Superconductor motor (about minus 400 degrees Fahrenheit). Suggest that acceptance by the Navy for use in the DD(X) be the criteria for meeting power density requirement.