University of Illinois Urbana-Champaign

Modeling and control of interior permanent magnet synchronous machines at low switching-to-fundamental frequency ratios

Tungare, Samira

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https://hdl.handle.net/2142/115625

Description

Title
Modeling and control of interior permanent magnet synchronous machines at low switching-to-fundamental frequency ratios
Author(s)
Tungare, Samira
Issue Date
2022-04-29
Director of Research (if dissertation) or Advisor (if thesis)
Banerjee, Arijit
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
  • Interior Permanent Magnet Synchronous Machines
  • Electric Drives,
  • Current Control
Abstract
Electric vehicles have the potential to reduce carbon emissions and transform the transportation sector. An interior permanent magnet synchronous machine (IPMSM) offers high-power density and can operate over a wide speed range which makes it an attractive option for electric vehicles. Furthermore, it is more mechanically robust in comparison to a surface-mounted permanent magnet synchronous machine (SPMSM) due to the magnets being embedded within the rotor. Electric vehicles tend to operate at low ratios of switching-to fundamental frequency which can lead to challenges from a current control perspective. This thesis investigates control algorithms for IPMSMs when operating at a low ratio of switching-to-fundamental frequency. This work first examines the conventional scalar current control approach used and identifies its shortcomings. It then proposes an alternative current controller that has the potential to improve performance at low frequency ratios. A complex vector model of an IPMSM is derived in order to design the proposed complex vector controller. Simulations are performed to verify that the designed controller does indeed allow for adequate current control of the machine. Preliminary experimental results are presented showing that the controller has the potential to lead to controller performance improvements primarily at low switching-to-fundamental frequency ratios. Finally, the thesis concludes with a summary of the contributions and results and provides insight into future work that can be completed in this area.
Graduation Semester
2022-05
Type of Resource
Thesis
Copyright and License Information
Copyright 2022 Samira Tungare

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