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This paper presents the effects of information coding at the pulsating dc link on the performance of the high-frequency-link (HFL) inverter. The asymmetrical duty-cycle phase-shift modulation (resulting in pulse placement) of the front-end of the HFL inverter yields reduced frequency of the pulsating dc link voltage. It also results in reduced total harmonic distortion (THD) of the inverter output...
In this paper, we have proposed a parallel resonant soft switching inverter based on delta-modulation method. A conventional full-bridge inverter generates switching losses due to a hard switching. The proposed inverter operates soft switching using a DC-link switch and resonant circuit. Therefore, all of the switches in the proposed inverter are operate with soft switching. As a result, the proposed...
Batteries are widely used in quite a few areas, including in the electric vehicles (EV). As the voltage of the batteries are ever-changing, which drops from a high value to a low value, kinds of regulators are utilized to keep the output voltage changing in an acceptable scope. However, the inverter output shaft voltage is a big threat to the motor connected with the inverter. In this paper, it is...
Power crisis in the world has compelled mankind to think for alternative energy. But all the alternative sources have not yet been exploited. From many ongoing researches, it reveals that if all the alternative energy sources are exploited, the energy crisis of the world would be reduced to a great extent. Many alternative energy technologies today are well developed and they are reliable and cost...
Feeding of rolling stock power converters by high-voltage DC catenary (3.0 kV DC) is complicated because of wide variations in supply voltages (2.0 kV...3.6 kV). The most efficient and simple topology for the rolling stock voltage converters is a two-level VSI directly connected to the traction catenary. This requires primary inverter switches with high voltage blocking capability to be implemented...
A novel design of a photovoltaic grid connected inverter is presented. The inverter is realized so as to attain current source characteristics for simple connectivity to the grid. The advantage of this realization is simplified system due to the fact that no voltage amplitude matching or modulating is required and the wave shape of the grids voltage has no influence. The inverter's current polarity...
This paper presents a new switching strategy controlling a new three-level voltage source inverter, resulting in different 25 space voltage-vectors. The new inverter combines some desirable features of two and three-level inverters. The proposed open-leg switching strategy (OLSS) intentionally opens one of the three inverter-legs per-time, in a pre-planned sequence. Thus, the number of allowed states...
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