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  <titleInfo>
    <title>Estimation of speed-sensitive thermal model for dc machines using transfer function</title>
  </titleInfo>
  <name type="personal">
    <namePart>Muhammad Syawal Mat Jahak</namePart>
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    <dateIssued encoding="marc">2025</dateIssued>
    <issuance>monographic</issuance>
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  <language>
    <languageTerm authority="iso639-2b" type="code">eng</languageTerm>
  </language>
  <physicalDescription>
    <extent>xvii, 168 pages : illustrations ; 30 cm. + 1 CD-COM</extent>
  </physicalDescription>
  <abstract>Motors account for 40% of global electricity consumption and 13% of carbon emissions  and often suffer irreversible thermal damage. To prevent excessive electrical waste and  improve reliability, it’s crucial to monitor motor temperature accurately and halt  operation at safe levels. This study aims to develop a real-time model for monitoring  motor temperature in MY1016 direct current machines, using a transfer function. The  objectives include identifying the most precise transfer function to model the temperature  response of each component at different speed, developing, and validating a generalized  model using averaged-pole and variable-pole transfer function models, and finally  evaluating their feasibility for fault detection. Experimental data was recorded for  different motor components including the brush, bearing, permanent magnet and casing.  The motor was operated at speeds from 20% to 100% of nominal speed with no load,  until thermal equilibrium was reached. The MATLAB system identification toolbox was  used to identify the transfer function, with a number of poles varying from 1 to 4 and  with no zeros. The study found that the temperature response of the MY1016 motor at  60% of the nominal speed produces the highest temperature. The brush was best  represented by a 3rd order transfer function, while a 1st order transfer function is  sufficient to represent other components. The non-LTI characteristic of the temperature  response observed from the pole analysis led to a choice of modeling using variable-pole  transfer function to create the baseline temperature model. It can estimate temperature  response during both steady and transient speed states, with a maximum temperature  difference of 10 ℃. The study concludes that the variable-pole transfer function can be  used to monitor electric motors' condition using several testing scenarios. The same  method can be suggested to be applied on other types of motors.</abstract>
  <targetAudience authority="marctarget">specialized</targetAudience>
  <note type="statement of responsibility">Muhammad Syawal Bin Mat Jahak</note>
  <note>Faculty of Manufacturing and Mechatronic Engineering Technology</note>
  <note>Thesis (Master of Science) -- Universiti Malaysia Pahang – 2025</note>
  <note>Includes bibliographical references</note>
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    <name type="corporate">
      <namePart>Faculty of Manufacturing and Mechatronic Engineering Technology</namePart>
    </name>
    <topic>Dissertations</topic>
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  <subject authority="lcsh">
    <topic>Universities and colleges</topic>
    <topic>Dissertations</topic>
  </subject>
  <subject authority="lcsh">
    <topic>Theses</topic>
    <topic>Dissertations</topic>
  </subject>
  <identifier type="isbn">THE0010079 (Local)</identifier>
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    <recordCreationDate encoding="marc">250516</recordCreationDate>
    <recordChangeDate encoding="iso8601">20251125111041.0</recordChangeDate>
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      <languageTerm authority="iso639-2b" type="code">eng</languageTerm>
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