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This assay supposed one kind of asymmetrical multi-level inverter that based on the topology of cells cascading, every cell in this inverter is composed of one two-levels inverter series with several three-levels H bridges, the controlling system is constructed by DSP and FPGA. This article described the topology of this inverter and its controlling methods in detail. In final, tested this inverter's...
There is a strong trend in the photovoltaic (PV) inverter technology to use transformerless topologies in order to acquire higher efficiencies. This paper presents a single-phase five-level grid connected PV inverter with a novel dual reference modulation technique. Two reference signals identical to each other with an offset equivalent to the amplitude of the rectified inverted sine carrier signal...
This project has been oriented to the development of an energy system unit for powering tramways during shorts periods of time. The aim of this work is to present the results obtained for a high frequency DC-DC converter which is included in the energy unit. The energy unit will consist on two type of energy storage devices: a battery stack and a supercapacitor stack. A comparison of the simulated...
This paper describes a new configuration of the single-phase seven-level voltage source inverter. The proposed inverter based on modified H-bridge converter. The inverter is built of conventional H-bridge inverter and two bidirectional switches and three bulk capacitor banks. To validate the proposed inverter, a low power prototype inverter has been designed and implemented; analytical, simulation...
This paper proposes an input-paralleled output-paralleled half-bridge converter based on single half-bridge converter, which is very suitable for the low output voltage and large output current application. All modules share a common capacitor-leg, that can reduce the number of main circuitpsilas capacitors and make topology simple. The traits and rules of combination converter are introduced and...
Because of the shortage of the IGCTpsilas series connection to obtain 6 kV output, the medium voltage drive (MVD) based on the H bridge neutral point clamped three-level inverter is introduced. Consequently, the arising of the common mode voltage (CMV) is discussed, the equivalent CMV circuit is deduced, and the common-mode circle currents are proposed in this paper. With the analysis of the relationship...
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