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). 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. . https://doi.org/10.1109/ECCE47101.2021.9595933

• Conference Name: 2021 IEEE Energy Conversion Congress and Exposition (ECCE)
• Conference Location: Vancouver, BC, Canada
• 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: IEEE
• Pages: 4854-4858
• Series Title: IEEE Energy Conversion Congress and Exposition
• Series ISSN: 2329-3748
• 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
• Additional Information: © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.