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Open AccessArticle

Novel Dead-Time Compensation Strategy for Wide Current Range in a Three-Phase Inverter

Department of Electrical Engineering, Konkuk University, Seoul 05029, Korea
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Electronics 2019, 8(1), 92; https://doi.org/10.3390/electronics8010092
Received: 16 November 2018 / Revised: 13 December 2018 / Accepted: 23 December 2018 / Published: 15 January 2019
(This article belongs to the Special Issue Renewable Electric Energy Systems)
This paper proposes a novel three-phase voltage source inverter dead-time compensation strategy for accurate compensation in wide current regions of the inverter. In particular, an analysis of the output voltage distortion of the inverter, which appears as parasitic components of the switches, was conducted for proper voltage compensation in the low current region, and an on-line compensation voltage controller was proposed. Additionally, a new trapezoidal compensation voltage implementation method using the current phase was proposed to simplify realizing the trapezoidal shape of the three-phase compensation voltages. Finally, when the proposed dead-time compensation strategy was applied, the maximum phase voltage magnitude in the linear modulation voltage regions was defined to achieve smooth operation even at high modulation index. Simulations and experiments were conducted to verify the performance of the proposed dead-time compensation scheme. View Full-Text
Keywords: dead-time compensation strategy (DTCS); dead-time compensation; trapezoidal compensation voltage; dead-time effects; three-phase voltage source inverter (VSI) compensation dead-time compensation strategy (DTCS); dead-time compensation; trapezoidal compensation voltage; dead-time effects; three-phase voltage source inverter (VSI) compensation
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Lim, J.-W.; Bu, H.; Cho, Y. Novel Dead-Time Compensation Strategy for Wide Current Range in a Three-Phase Inverter. Electronics 2019, 8, 92.

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