University of Illinois Urbana-Champaign

Electromagnetic modeling and variable-speed-operation characteristics of inverter-driven, high-frequency, low-inductance permanent magnet synchronous machines

Zhang, Xiaolong

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https://hdl.handle.net/2142/115603

Description

Title
Electromagnetic modeling and variable-speed-operation characteristics of inverter-driven, high-frequency, low-inductance permanent magnet synchronous machines
Author(s)
Zhang, Xiaolong
Issue Date
2022-04-22
Director of Research (if dissertation) or Advisor (if thesis)
Haran, Kiruba Sivasubramaniam
Doctoral Committee Chair(s)
Haran, Kiruba Sivasubramaniam
Committee Member(s)
  • Krein, Philip T
  • Alleyne, Andrew G
  • Banerjee, Arijit
  • Stillwell, Andrew R
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
  • Permanent magnet synchronous machine
  • current harmonics
  • electromagnetic loss
  • operational inductance
  • inverter drive
  • system optimization
Abstract
Electric propulsion for large commercial aircraft to reduce fuel use and emissions has been proposed in light of its potential for enormous environmental and economic benefits. Electric machines with a high power-to-mass ratio and high efficiency are required in the electrified propulsion systems. There is a trend in machine design that employs high-frequency, low-inductance (HFLI), permanent magnet synchronous machines (PMSMs) to boost efficiency while minimizing weight. As the variable-speed-operation characteristics of inverter-fed HFLI PMSMs are substantially different from those of conventional machines, high-fidelity modeling and thorough analysis, including the effects of pulse-width-modulation time harmonics, are required. This dissertation describes a methodology for the machine drive system design and optimization with analytical tools for equivalent circuit parameters estimation and fast harmonic and electromagnetic loss prediction. Actual hardware tests are conducted to validate the models, tools and methodology. It is proved that the proposed machine topology, together with a two-level silicon-carbide MOSFET voltage-source inverter, can achieve two to four times higher specific power than the state of the art.
Graduation Semester
2022-05
Type of Resource
Thesis
Copyright and License Information
Copyright 2022 Xiaolong Zhang

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