Study and Analysis of Robust Control Technology and Wide Bandgap Power Device-Based Power Converters

Abstract

In this paper, a robust control technology is proposed, and applied to wide bandgap power device-based power converters. The proposed robust control technology combines the excellences of a fast finite-time sliding mode (FTTSM) and a fuzzy tuning. The FTTSM can enforce system trajectory to the equilibrium within a short time. Nevertheless, the chattering exists in sliding surface of the FTTSM. The chattering may damage converter components, and cause high voltage harmonics. To reduce the chattering, the sliding surface is smoothed by the use of the fuzzy tuning. With the presented robust control technology, a high performance wide bandgap power device-based power converter with low total harmonic distortion and fast transient response yields, even in the presence of nonlinear loading. The classic power converter experimental results and the proposed power converter simulated results are compared, verifying the efficacy of the proposed robust control technology.