A Simple PWM Strategy for Three-Level NPC Converters in Aircraft Electric Starter/Generator System With Improved DC-Link Voltage Utilization and Reduced Common-Mode Voltage

Guo, Feng; Yang, Tao; Yeoh, Seang Shen; Bozhko, Serhiy; Wheeler, Patrick; Diab, Ahmed M.

Abstract

Due to the employment of three-level neutral-point-clamped (3L-NPC) converters in the aircraft electric starter/generator (ESG) systems, the pulse-width-modulation (PWM) strategy plays a significant role in the converter-fed PMSM drives. However, the studied ESG system operates under a high modulation index and low power factor conditions during generation mode. It means the neutral-point (NP) voltage imbalance issue will become aggravated. Regarding the reliability and efficiency of high-speed motors, reduced common-mode voltage (CMV) is favorable for the lifetime of bearing insulation. Also, a definite aircraft DC-bus voltage of 270VDC causes deep flux-weakening currents when the machine operates at a high-speed. Additionally, the applied modulation scheme desires short execution-time for the purpose of algorithmic-efficiency. In this paper, a high-performance PWM strategy is proposed to achieve a higher DC-link voltage utilization, CMV reduction, capacitor voltage balance and simple implementation at the same time.

Citation

Guo, F., Yang, T., Yeoh, S. S., Bozhko, S., Wheeler, P., & Diab, A. M. (2021, October). A Simple PWM Strategy for Three-Level NPC Converters in Aircraft Electric Starter/Generator System With Improved DC-Link Voltage Utilization and Reduced Common-Mode Voltage. Presented at 2021 IEEE Energy Conversion Congress and Exposition (ECCE), Vancouver, BC, Canada

• Presentation Conference Type: Edited Proceedings
• Conference Name: 2021 IEEE Energy Conversion Congress and Exposition (ECCE)
• Start Date: Oct 10, 2021
• End Date: Oct 14, 2021
• Acceptance Date: Apr 30, 2021
• Online Publication Date: Nov 16, 2021
• Publication Date: Oct 10, 2021
• Deposit Date: Apr 21, 2022
• Publicly Available Date: Apr 21, 2022
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Pages: 4854-4858
• Series ISSN: 2329-3748
• Book Title: 2021 IEEE Energy Conversion Congress and Exposition (ECCE)
• ISBN: 9781728161280
• DOI: https://doi.org/10.1109/ECCE47101.2021.9595933
• Public URL: https://nottingham-repository.worktribe.com/output/7784778
• Publisher URL: https://ieeexplore-ieee-org.nottingham.idm.oclc.org/document/9595933