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In this paper, a new AC-DC single stage three-level resonant converter has been proposed for high voltage DC distribution system of datacenters applications. This converter convert universal input voltage range (90–265Vrms) to 380VDC with high power factor. The proposed topology integrates a bridgeless boost converter and a half-bridge three level resonant converter. Voltage stresses on the switches...
This article has proposed a control strategy for balancing the capacitors' voltage of cascaded H-bridge rectifier. The working principle of cascaded H-bridge rectifier has been described, as well as the balancing boundary condition of capacitors' voltage. Then, the dual modulation curves control strategy has been proposed for balancing the capacitors' voltage in dc side of the rectifier. Furthermore,...
In this paper, the relations among the active power distribution, modulation wave and unbalanced loads range are analyzed. A maximum unbalanced loads range is proposed by modifying modulation waveforms under the unity power factor. And a modified staircase modulation, which is easy to realize, is proposed for a single-phase cascaded H-bridge multilevel rectifier to extend the range of unbalanced loads...
The control strategy of cascaded rectifier which is used as the first stage of a new generation cascaded line-frequency transformerless power converter is discussed in this paper. The circuit model of cascaded rectifier stage is simplified, and the mathematical model of cascaded rectifier stage is set up based on Single-Phase Rotating Frame. A balance strategy for DC link capacitor voltage of each...
Two VCOs were fabricated and characterized for ICS application using InGaP/GaAs HBT technology. The cross coupled configuration achieved low phase noise of-130.3 dBc/Hz at 1 MHz offset from the carrier frequency (1.566 GHz), and the double cross coupled structure achieved excellent phase noise of-134.58 dBc/Hz at 1 MHz offset from the carrier frequency (1.630 GHz). Optimized feedback capacitors (CI...
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