Abstract
Dead-time is commonly designed to avoid shoot through phenomenon within each arm in voltage source converter. The presence of dead-time tends to cause power quality issue. Quantitative analysis for dead-time effects is important to mitigate power quality issue. This paper presents two harmonic quantitative analysis methods for dead-time effects in SPWM inverters. First the harmonic
analysis method based on double Fourier series is modified to adapt any initial phase angle and calculate additional harmonics from dead-time effects. Then, a calculation method for switching angles in sinusoidal pulse width modulation (SPWM) is presented. Based on the obtained switching angles and single Fourier series, a more concise calculation method is proposed to perform quantitative analysis for the impact of dead-time on harmonics. The harmonic model is able to reveal the mechanism of harmonics generation from dead-time. Finally, the inner relationship and essential difference between double- and single- Fourier series are summarized. Simulation and experimental results show that both of the proposed quantitative analysis methods can accurately evaluate the effect of dead-time on harmonics.
analysis method based on double Fourier series is modified to adapt any initial phase angle and calculate additional harmonics from dead-time effects. Then, a calculation method for switching angles in sinusoidal pulse width modulation (SPWM) is presented. Based on the obtained switching angles and single Fourier series, a more concise calculation method is proposed to perform quantitative analysis for the impact of dead-time on harmonics. The harmonic model is able to reveal the mechanism of harmonics generation from dead-time. Finally, the inner relationship and essential difference between double- and single- Fourier series are summarized. Simulation and experimental results show that both of the proposed quantitative analysis methods can accurately evaluate the effect of dead-time on harmonics.
Originalsprog | Engelsk |
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Artikelnummer | 6287639 |
Tidsskrift | IEEE Access |
Vol/bind | 7 |
Sider (fra-til) | 43143-43152 |
Antal sider | 10 |
ISSN | 2169-3536 |
DOI | |
Status | Udgivet - mar. 2019 |