This paper describes the modeling and control of a three-phase grid-connected converter fed by a photovoltaic array. The converter is composed of an isolated DC-DC converter and a three-phase DC-AC voltage source inverter The converters are modeled in order to obtain small-signal transfer functions that are used in the design of three closed-loop controllers: for the output voltage of the PV ar...

To increase the efficiency of a natural gas engine, use Miller camshaft was analysed. avoid decline in low-end torque and also transient response, pressure wave supercharger (Comprex™) compared to conventional single-stage turbocharger. The analyses for this conceptual comparison were performed experimentally, data then used run simulations driving cycles light commercial vehicles. A 49% result...

Abstract – A novel parallel three-level zero voltage switching (ZVS) DC converter is presented for medium voltage applications. The proposed converter includes three sub-circuits connected in parallel with the same power switches to share load current and reduce the current stress of passive components at the output side. Thus, the size of the output chokes is reduced and the switch counts in t...

The U.S. faces the difficult dual challenge of reducing the consumption of transportation fuels and improving air quality. Lean burn gasoline, diesel, and natural gas engines are of interest because they are more fuel efficient than conventional stoichiometric gasoline engines. Unfortunately, the unconverted oxygen in the exhaust prevents the use of the conventional three-way catalytic converte...

In this paper, a new step-up/step-down AC-AC converter is designed by switched capacitor (SC) techniques. The main features of the proposed SC AC-AC converter are the symmetrical converter topology and the absence of magnetic elements. Owing to the symmetrical converter topology, the number of capacitors in the proposed AC-AC converter is fewer than that in the conventional SC AC-AC converter. ...

Installing a catalytic converter in the exhaust is typical method of reducing engine emissions. Catalytic converters have been shown to lower pollutants while enhancing performance. The influence number brass catalyst plates (Cu-Zn) on Performance commercial Yamaha Jupiter MX motorcycle manufactured 2007 was investigated this study. installed motorbike exhaust, with varying between 5 and 8, con...