An interleaved multilevel inverter topology for high-frequency low-inductance motors

Electric vehicle and electric aviation applications require lightweight electro-mechanical energy conversion; however, passive components in the drive system can constrain the power density. Slotless machine construction can attain high power density, but such designs result in very low per-phase machine inductances. The reduced inductance imposes additional filtering requirements between the inverter and motor, which lower the power density benefits gained from the slotless design used. Furthermore, the dc-link capacitor within the inverter increases significantly the overall weight and volume. In this work, the advantages of interleaving multilevel topologies are discussed, and an interleaved hybrid active neutral point clamped (I-HANPC) converter is proposed to achieve reduced output filter sizes and enable a smaller dc-link capacitor. The design is demonstrated with a 7-level I-HANPC experimental hardware prototype that attains a peak efficiency of 98.8% with low output total harmonic distortion.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Electrical & Computer Engr

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2023

Author dc:creator

• Bali, Arjit

Contributors dc:contributor

• Stillwell, Andrew R

• Multilevel Inverter
• Flying Capacitor Multilevel Converter
• Hybrid Active Neutral Point Clamped Converter
• Interleaved Hybrid Active Neutral Point Clamped Converter
• Dc-link Capacitor
• Interleaving
• Voltage Source Inverter

Statement dc:rights

• Copyright 2023 Arjit Bali

Language dc:language

en, eng

Handle dc:identifier

https://hdl.handle.net/2142/122005

OAI record oai:identifier

https://www.ideals.illinois.edu/oai-pmh?verb=GetRecord&metadataPrefix=etdms&identifier=oai%3Awww.ideals.illinois.edu%3A2142%2F122005