In this paper, a charge control with an input voltage feedforward is proposed for an input-series–output-parallel-connected converter configuration for the high-speed-train power system application. This control scheme accomplishes the output current sharing for the output-parallel-connected modules as well as the input voltage sharing for the input-series-connected modules for all operating co...

Abstract Duplex stainless steels offer a high strength alternative to steel, while providing excellent corrosion resistance, due their dual-phase microstructure. This microstructure can be significantly influenced during welding, thus the maximum recommended heat input is usually 2.5 kJ/mm. In this research, we inspected (3 kJ/mm) weldability of NSSC 2120 lean duplex which designed and develope...

With the rapid increase in size of container ships, steel plates used for ship hulls have increased thickness. The use thick leads to an welding. Alternative welding processes such as electro gas (EGW), with high heat input been replacing multi-pass flux cored arc process. Shipbuilding companies tended EGW increasingly improve productivity. However, because toughness tends decrease thicker plat...