Conference Papers
Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506
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Item Sub-period interleaved Fibonacci switched capacitor converter(Institute of Electrical and Electronics Engineers Inc., 2017) Subburaj, V.; Jena, D.This paper proposes, the topology of dual output interleaved Fibonacci switched capacitor converter by using a basic synthesis of Fibonacci converter. The proposed converter have more efficiency less voltage ripple. In the single output SCC, resolution of target voltage are spaced as 1/X, but in proposed method target voltage are spaced as 1+X, which gives a number of conversion ratios. The proposed converter are used for low power application such as VLSI system and energy harvesting devices. Theoretical results and simulation results are verified using PSIM. © 2016 IEEE.Item Design of series, Fi=Fi-1+Fi-3 for the denominators (1, 2,6) of switched capacitor converter(Institute of Electrical and Electronics Engineers Inc., 2017) Subburaj, V.; Jena, D.; Kumar, R.; Deshmukh, A.V.; Nayak, B.; Bansal, H.This paper proposes, the concept of generalized Fibonacci switched capacitor converter for Fi=Fi-1+Fi-3 series. The proposed converter have more efficiency and less equivalent resistance. Generalized Fibonacci switched capacitor converters (SCCs) are technologically advanced which operates on fixed conversion ratio. Different target ratios of Fibonacci series have already been carried out by the researchers to step-up and stepdown configuration. But, different target ratios of Fi=Fi-1+Fi-3 series has not yet proposed. In this paper different fractions 1/4,3/4,1/6,5/6 for SCC is proposed for both step-up and stepdown configurations. Theoretical results and simulation results are verified using PSIM. © 2016 IEEE.Item Effect of retrogression and re-ageing heat treatment on microstructure and microhardness of aluminium 7010 alloy(EDP Sciences edps@edpsciences.com, 2018) Nandana, M.S.; Udaya Bhat, K.; Manjunatha, C.M.Aluminium alloy 7010 is subjected to retrogression and re-ageing (RRA) heat treatment to study the influence of microstructural changes on hardness. Retrogression is performed at 190 °C for different time intervals ranging from 10 to 60 minutes. Optimum time for retrogression treatment is estimated based on the retrogression time that result with equivalent mechanical properties as that of peak aged (T6) condition. Retrogression performed for 30 minutes resulted with micro hardness of 203 HV, which is equivalent to that obtained by following T6 treatment. Microstructural characterization done with the help of transmission electron microscope (TEM) indicates RRA treatment results with the coarsened and discontinuous precipitates along the grain boundary which is similar to over aged (T7) condition, where as fine and densely populated precipitates in the matrix similar to T6 condition. Coarse and discontinuous grain boundary precipitates (GBP's) improves resistance to stress corrosion cracking. Fine and dense precipitates in the matrix ensures hardness equivalent to that of T6. © The Authors, published by EDP Sciences, 2018.Item An Algorithm Steps to Solve Coupled Case for Dual Input Dual Output SCC(Institute of Electrical and Electronics Engineers Inc., 2018) Zhaikhan, A.; Subburaj, V.; Mustafa, Y.; Jena, D.; Parthiban, P.; Ruderman, A.The proposed converter is designed for low power applications. In this paper, the algorithm is proposed to solve the coupled case of dual input and the dual output converter. The major contribution is R-parameters calculation for the coupled case is deliberated in detail where it includes all conduction and ohmic losses accounting for coupling effects. To validate the performance of designed SCC, modeling and mathematical analysis has been carried out. The results are verified using PSIM simulations and validated mathematically. The analytical and simulation results give excellent proof for the newly designed coupled converter. © 2018 IEEE.