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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

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 modulati...

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Main Authors:	Guo, Feng, Yang, Tao, Yeoh, Seang Shen, Bozhko, Serhiy, Wheeler, Patrick, Diab, Ahmed M.
Format:	Conference Proceeding
Language:	English
Subjects:	Aircraft electric starter/generator common-mode voltage DC-link voltage utilization Energy conversion Insulation Insulation life neutral-point potential balance Pulse width modulation Reactive power Simulation three-level topology Voltage
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creator	Guo, Feng Yang, Tao Yeoh, Seang Shen Bozhko, Serhiy Wheeler, Patrick Diab, Ahmed M.
description	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.
doi_str_mv	10.1109/ECCE47101.2021.9595933
format	conference_proceeding
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source	IEEE Xplore All Conference Series
subjects	Aircraft electric starter/generator common-mode voltage DC-link voltage utilization Energy conversion Insulation Insulation life neutral-point potential balance Pulse width modulation Reactive power Simulation three-level topology Voltage
title	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
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