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

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.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Electrical & Computer Engr

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2022

Author dc:creator

• Zhang, Xiaolong

Contributors dc:contributor

• Stillwell, Andrew R
• Haran, Kiruba Sivasubramaniam
• Krein, Philip T
• Alleyne, Andrew G
• Banerjee, Arijit

• Permanent magnet synchronous machine
• current harmonics
• electromagnetic loss
• operational inductance
• inverter drive
• system optimization

Statement dc:rights

• Copyright 2022 Xiaolong Zhang

Language dc:language

en, eng

Handle dc:identifier

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

OAI record oai:identifier

https://www.ideals.illinois.edu/oai-pmh?verb=GetRecord&metadataPrefix=etdms&identifier=oai%3Awww.ideals.illinois.edu%3A2142%2F115603