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논문 기본 정보

자료유형
학술저널
저자정보
Tuyen D. Nguyen (HoChiMinh City University of Technology) Dzung Quoc Phan (HoChiMinh City University of Technology) Dat Ngoc Dao (HoChiMinh City University of Technology) Hong-Hee Lee (University of Ulsan)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.14 No.6
발행연도
2014.11
수록면
1,197 - 1,207 (11page)

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초록· 키워드

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Common-mode voltage (CMV) causes overvoltage stress to winding insulation and damages AC motors. CMV with high dv/dt causes leakage currents, which create noise problems for equipment installed near the converter. This study proposes a new pulse-width modulation (PWM) strategy for three-level T-type NPC inverters. This strategy substantially eliminates CMV. The principle for selecting suitable triangle carrier signals for the three-level T-type NPC is described. The proposed method can mitigate the peak value of CMV by 50% compared with the phase disposition pulse-width modulation method. Furthermore, the proposed method exhibits better harmonic spectrum and lower root mean square value for the CMV than those of the reduced-CMV method on the basis of the phase opposition disposition PWM scheme with modulation index higher than 0.5. The proposed modulation can easily be implemented using software without any additional hardware modifications. Both simulation and experimental results demonstrate that the proposed carrier phase-shift PWM method has good output waveform performance and reduces CMV.

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Abstract
I. INTRODUCTION
II. CMV ANALYSIS AND CONVENTIONAL METHODS
III. PROPOSED CARRIER PHASE-SHIFT PWM METHOD FOR CMV REDUCTION
IV. SIMULATION RESULTS
V. EXPERIMENTAL RESULTS
VI. CONCLUSIONS
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