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Among the traditional schemes of current differential protection for power transformer, the principles of second harmonic restraint and dead angle restraint to distinguish inrush current from fault current are influenced such many factors as the decrease of transformer core magnetic saturation and CT transient saturation. In fact, the inrush current is characterized of its peaky wave and its relatively...
Studies of microtransformer-based switching converters are reviewed in this paper. A multilayered planar device consisting of zigzag-shape coils and Co-Zr amorphous magnetic films is used as the converter's main transformer. A resonant-type microconverter driven at high frequencies (6 MHz) shows excellent characteristics suited to practical applications, including high efficiency (49.5%), high output...
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