Abstract
DC-link current is an important parameter for selection and design of DC-link capacitor or battery. Considering the AC current ripple, this study introduced a general DC-link current real-time prediction method for three-phase two-level voltage inverters (three-phase 2L-VSI) using the pulse width modulation. Compared with the traditional analysis which just takes AC average current into consideration, the time-domain comparison and spectral analysis of DC-link current have been studied. Meanwhile, accurate calculation of RMS current on the DC-link capacitor has been provided. Simulation results and experimental results are provided to support the analysis and proposed method.
Published Version
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