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  • Calhoun: The NPS Institutional Archive

    Theses and Dissertations Thesis Collection

    1996-12

    The analysis, simulation and control of

    cycloconverter drives for ship propulsion

    Mercer, Christopher P.

    Monterey, California. Naval Postgraduate School

    http://hdl.handle.net/10945/32014

  • ----------------------------------

    NAVAL POSTGRADUATE SCHOOL MONTEREY, CALIFORNIA

    THESIS

    THE ANALYSIS, SIMULATION AND CONTROL OF CYCLOCONVERTER DRIVES FOR SHIP

    PROPULSION

    by

    Christopher P. Mercer

    December 1996

    Thesis Advisor: John G. Ciezki

    Approved for public release; distribution is unlimited.

    19970701 071

    q

  • r------------------------------------------

    REPORT DOCUMENTATION PAGE Fonn Approved OMB No. 0704-0188

    Public reporting burden for this collection of infonnation is estimated to average I hour per response, including the time for reviewing instruction, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of infonnation. Send comments regarding this burden estimate or any other aspect of this collection of infonnation, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Infonnation Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188) Washington DC 20503.

    1. AGENCY USE ONLY (Leave blank) 2. REPORT DATE 3. REPORT TYPE AND DATES COVERED

    December 1996. Master's Thesis

    4. TITLE AND SUBTITLE. 5. FUNDING NUMBERS

    THE ANALYSIS, SIMULATION AND CONTROL OF CYCLOCONVERTER DRIVES FOR SHIP PROPULSION

    6. AUTHOR(S) Mercer, Christopher, P.

    7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8. PERFORMING

    Naval Postgraduate School ORGANIZATION

    Monterey CA 93943-5000 REPORT NUMBER

    9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSORING/MONITORING AGENCY REPORT NUMBER

    11. SUPPLEMENTARY NOTES The views expressed in this thesis are those of the author and do not reflect the official policy or position of the Department of Defense or the U.S. Government.

    12a. DISTRIBUTION/AVAILABILITY STATEMENT 12b. DISTRIBUTION CODE

    Approved for public release; distribution is unlimited.

    13. ABSTRACT (maximum 200 words) Naval expeditionary forces of the future will require new, technologically advanced, multi-mission

    surface combatants. The design philosophy for future surface combatants stresses survivability, efficiency, and modularity through the use of a modem open-architecture consisting of commercial off-the-shelf and dual-use systems. An integrated propulsion and electrical power generation system which utilizes advanced, commercially viable power electronics and state-of-the-art control and monitoring systems is viewed as the appropriate system for the future surface combatant.

    This study provides the designing naval engineer with technical background information and design considerations for the application of a cycloconverter drive for ship propulsion in an integrated power system. The cycloconverter is a power electronic circuit which performs a single-stage conversion of an ac input voltage at one frequency to an ac output voltage of variable frequency and amplitude. Cycloconverters are generally used for low-speed, very large horsepower applications and with suitable closed-loop control can develop torque and speed responses suitable for ship propulsion. External performance characteristics and control issues for the cycloconverter are discussed, followed by a time-domain computer simulation of an integrated ship propulsion drive utilizing a cycloconverter.

    From the technical background information, external performance characteristics and computer simulation analysis, the designing naval engineer can make educated decisions on the application of a cycloconverter drive for ship propulsion.

    14. SUBJECT TERMS Cycloconverter, Integrated Power System, Surface Combatant 21, 15. NUMBER OF

    ACSL, Ship Propulsion, Dual Converter, Electric Drive

    17. SECURITY CLASSIFICA- 18. SECURITY CLASSIFI- 19. TION OF REPORT CATION OF THIS PAGE Unclassified Unclassified

    NSN 7540-01-280-5500

    PAGES 172

    16. PRICE CODE

    SECURITY CLASSIFICA- 20. LIMITATION OF TION OF ABSTRACT Unclassified

    ABSTRACT UL

    Standard Fonn 298 (Rev. 2-89) Prescribed by ANSI Std. 239-18 298-102

  • ii

  • Approved for public release; distribution is unlimited

    THE ANALYSIS, SIMULATION AND CONTROL OF

    CYCLOCONVERTER DRIVES FOR

    SHIP PROPULSION

    Christopher P. Mercer Lieutenant, United States Navy

    B.S., Maine Maritime Academy, 1988

    Submitted in partial fulfillment of the requirements for the degree of

    MASTER OF SCIENCE IN ELECTRICAL ENGINEERING

    Author: --

    Approved by:

    from the

    NAVAL POSTGRADUATE SCHOOL December 1996

    Her·scbel H. Loomis, Jr., (1fi

  • iv

  • ABSTRACT

    Naval expeditionary forces of the future will require new, technologically advanced,

    multi-mission surface combatants. The design philosophy for future surface combatants stresses

    survivability, efficiency, and modularity through the use of a modern open-architecture

    consisting of commercial off-the-shelf and dual-use systems. An integrated propulsion and

    electrical power generation system which utilizes advanced, commercially viable power

    electronics and state-of-the-art control and monitoring systems is viewed as the appropriate

    system for the future surface combatant.

    This study provides the designing naval engineer with technical background information

    and design considerations for the application of a cycloconverter drive for ship propulsion in an

    integrated power system. The cycloconverter is a power electronic circuit which performs a

    single-stage conversion of an ac input voltage at one frequency to an ac output voltage of

    variable frequency and amplitude. Cycloconverters are generally used for low-speed, very large

    horsepower applications and with suitable closed-loop control can develop torque and speed

    responses suitable for ship propulsion. External performance characteristics and control issues

    for the cycloconverter are discussed, followed by a time-domain computer simulation of an

    integrated ship propulsion drive utilizing a cycloconverter.

    From the technical background information, external performance characteristics and

    computer simulation analysis, the designing naval engineer can make educated decisions on the

    application of a cycloconverter drive for ship propulsion.

    v

  • vi

  • TABLE OF CONTENTS

    I. INTRODUCTION ............................................................................................................ 1

    A. ELECTRIFYING SIDPS OF THE FUTURE ................................................................ 1 1. Future Naval Combatant Ships .......................................................................... 1 2. Propulsion System Options ............................................................................... 2 3. Advantages of Electric Motor Drives ................................................................ 4 4. Cycloconverter Drives ....................................................................................... 5

    B. CURRENT APPLICATIONS OF CYCLOCONVERTER DRIVES ............................ 7 1. Ship Propulsion Applications ............................................................................ 7 2. Industrial Applications ...................................................................................... 8

    C. APPROACH TO THE STUDY ..................................................................................... 8

    II. CYCLOCONVERTER BASICS .................................................................................. 11

    A. GENERAL DESCRIPTION ........................................................................................ 11 1. Basic Cyc1oconverter Power Circuit ............................................................... 11 2. Functional Description .................................................................................... 13

    a. Single-Phase Dual Converter .............................................................. 13 b. Single-Phase Cycloconverter .............................................................. 15

    3. Output Voltage Waveform .............................................................................. 17 4. Input System Effects ........................................................................................ 22

    B. THREE-PHASE CYCLOCONVERTER TOPOLOGIES ........................................... 25 1. General Comments .......................................................................................... 25

    a. Pulse Numbers .................................................................................... 25 b. Reactors .............................................................................................. 26 c. Isolated Phases .................................................................................... 26

    III. CYCLOCONVERTER CONTROL .................................