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<p>An evaluation was conducted of the various propulsion motors being considered
for electric ship propulsion. The benefit of such an evaluation is that all of the propulsion
options being considered by the U.S. Navy have been described in one document. The
AC induction motor, AC synchronous motor, High Temperature Superconducting (HTS)
motor and Superconducting DC Homopolar Motor (SDCHM) are examined. The properties,
advantages, and disadvantages of each motor are discussed and compared. The
power converters used to control large propulsion motors are also discussed. The Navy’s
IPS program is discussed and the results of concept testing are presented. Podded propulsion
is introduced and the benefits are discussed. The final chapter presents the simulation
results of a volts/Hertz controlled 30 MW induction motor. The evaluation revealed
that the permanent magnet motor is the best propulsion motor when considering
mature technology, power density, and acoustic performance. HTS motors offer significant
volume reductions and improved acoustic performance as compared to conventional
motors. This includes both AC and DC HTS motors. The main obstacle for the SDCHM
remains the unavailability of high current capacity brushes.
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<br>Subjects: Ship propulsion, Electric; Ships; Electric equipment</div>
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Bassham, Bobby A.</div>
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