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In this paper, authors propose a novel six-band hysteresis technique to control the seven level packed U cells (PUC) converter which was first introduced in. This converter combines advantages of the flying capacitor and the cascaded H-bridge topologies. The study of the novel converter allows the establishment of the switches gates signals equations. In case of rectifier operation, the proposed six-band...
Active front-end converters with bidirectional power flow capability have been extensively used for utility applications of power electronics, in which the hybrid type with coupling capacitor in series connection is receiving much attention due to its low operating voltage and low switching ripples. This paper proposes an improved control strategy for hybrid active front-end converters in grid-connected...
A reactive power compensator implemented with three single phase NPC converters is presented and analyzed in this paper. The proposed topology, compared with the conventional three-phase NPC topology, presents the advantages of increasing the number of levels at the output line to line voltages with an independent control in each phase, suitable for unbalanced current compensation. Two independent...
Variable frequency induction heating has great potential for industrial heating applications due to the possibility of heating distribution control. Conventional high frequency converters are not suitable for the variable frequency operation; therefore, large scale induction heating with variable frequency has not yet been introduced to practical use. This paper proposes a soft-switching converter...
Integrating various interface converters of small-rated distributed generators into the power system has become a promising solution to rapidly increasing demand of premium electric power. The output voltage of distributed generators, such as PVs, is usually so low that a low-frequency coupling transformer is required to place between the interface inverter and the grid for proper power delivery....
The novel application of CCC technology in the slip energy recovery drive system (SERDS) is proposed for an improvement of the susceptibility of the inverter to commutation failure, reducing the reactive power consumption and a good power factor. In this paper, the reason of commutation failure is analyzed, simulation model with proposed commutated capacitors between the inverter bridge and the inverter...
A new three dimensional space vector modulation (3D-SVM) strategy in abc coordinates for the three phase four wire converter with split-capacitor is presented. Among various three phase four wire converters, the center split converter is suit to low cost, low power applications for its fewer switches. Compare to the 3D-SVM in alphabetagammacoordinates, the strategy in abc coordinates is more clearly...
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