TY - GEN
T1 - 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
AU - Guo, Feng
AU - Yang, Tao
AU - Yeoh, Seang Shen
AU - Bozhko, Serhiy
AU - Wheeler, Patrick
AU - Diab, Ahmed M.
N1 - Funding Information:
The research has been supported by Clean Sky 2 (Systems ITD, project EMINEO), European H2020 program. The author F. Guo would like to thank China Scholarship Council (CSC) for sponsoring part of his Ph.D studentship.
Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
KW - Aircraft electric starter/generator
KW - common-mode voltage
KW - DC-link voltage utilization
KW - neutral-point potential balance
KW - three-level topology
UR - http://www.scopus.com/inward/record.url?scp=85123346150&partnerID=8YFLogxK
U2 - 10.1109/ECCE47101.2021.9595933
DO - 10.1109/ECCE47101.2021.9595933
M3 - Conference contribution
AN - SCOPUS:85123346150
T3 - 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings
SP - 4854
EP - 4858
BT - 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 13th IEEE Energy Conversion Congress and Exposition, ECCE 2021
Y2 - 10 October 2021 through 14 October 2021
ER -
