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Elangovan P.,Nalin Kant Mohanty 전력전자학회 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.1
An active front end (AFE) is required for a three-phase induction motor (IM) fed by a voltage source inverter (VSI), because of the increasing need to derive quality current from the utility end without sacrificing the power factor (PF). This study investigates a proportional-plus-integral (PI) controller based AFE topology that uses a super-lift converter (SLC). The significance of the proposed SLC, which converts rectified AC supply to geometrically proceed ripple-free DC supply, is explained. Variations in several power quality parameters in the intended IM drive for 0% and 100% loading conditions are demonstrated. A simulation is conducted by using MATLAB/Simulink software, and a prototype is built with a field programmable gate array (FPGA) Spartan-6 processor. Simulation results are correlated with the experimental results obtained from a 0.5 HP IM drive prototype with speed feedback and a voltage/frequency (V/f) control strategy. The proposed AFE topology using SLC is suitable for three-phase IM drives, considering the supply end PF, the DC-link voltage and current, the total harmonic distortion (THD) in supply current, and the speed response of IM.
R. Karthik,Yu-Shen Hou,Shen-Ming Chen,A. Elangovan,M. Ganesan,P. Muthukrishnan 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.37 No.-
In the present investigation, we report a facile, reproducible and effortless biological synthesis of silvernanoparticles (Ag-NPs) utilizing Cerasus serrulata (C. serrulata) leaves extract as reducing as well asstabilizing agent. The size of synthesized Ag-NPs was in the range of 15–24 nm when examined withtransmission electron microscopy (TEM) and X-ray diffraction studies. The Ag-NPs obtained using C. serrulata exhibited excellent catalytic activity towards reduction of 4-nitrophenol (4-NPh) to 4-aminophenol in the presence of NaBH4 and demonstrate noteworthy electrochemical performance for 4-NPh reduction. The linear range, detection limit and sensitivity are estimated as 0.09–82.5 mM(r = 0.991), 0.06 mM and 3.0 mA mM 1 cm2 respectively. The Ag-NPs were found to show higherantimicrobial efficiency against Streptococcus mutans and Staphylococcus aureus.