Acoustic characterization of a stationary field synchronous motor
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Authors
Woodward, E.C. Jr.
Subjects
Advisors
Date of Issue
2001
Date
Aug-01
Publisher
Monterey California. Naval Postgraduate School
Language
en_US
Abstract
The stationary field synchronous motor (SFSM) has been described and analyzed previously. This machine usually consists of a stationary, direct current field winding and a rotating, alternating current armature winding. The field winding is superconducting. This topology presents certain advantages and disadvantages. One of the greatest theoretical advantages is reduced acoustic emission. The precise nature of such reductions has not been considered in previous work. We investigate the gross acoustic signature of a notional stationary field synchronous motor utilized as a marine propulsion motor in a naval combatant using the following methodology: (1) model the forces (harmonic by harmonic) of electromagnetic origin using solutions of the two dimensional Laplace Equation arising from the scalar potential of a magnetic field, (2) Develop a force spectrum based upon this modeling, (3) Develop appropriate acoustic transfer functions describing the acoustic * propagation of the machine components, equipment mounting structures, and other pertinent items in the machine-to-sea sound conduction path, (4) Apply the force spectrum to the acoustic transfer function(s), and (5) obtain a meaningful far-field acoustic signature due to the SFSM.
Type
Thesis
Description
CIVINS (Civilian Institutions) Thesis document
Series/Report No
Department
Organization
Massachusetts Institute of Technology
Identifiers
NPS Report Number
Sponsors
Funder
U.S. Naval Postgraduate School, CIVINS program
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Citation
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.