http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
FPGA Implementation of Diode Clamped Multilevel Inverter for Speed Control of Induction Motor
Kuppuswamy, C.L.,Raghavendiran, T.A. The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.1
This work proposes FPGA implementation of Carrier Disposition PWM for closed loop seven level diode clamped multilevel inverter in speed control of induction motor. VLSI architecture for carrier Disposition have been introduced through which PWM signals are fed to the neutral point seven level diode clamped multilevel using which the speed of the induction motor is controlled. This proposed VLSI architecture makes the power circuit to work better with reduced stresses across the switches and a very low voltage and current total harmonic distortion (THD). The output voltages, currents, torque & speed characteristics for seven level neutral point diode clamped multilevel inverter for AC drive was studied. It has observed the proposed scheme introduces less distortion and harmonics. The results were validated using real time results.
Computation of Refractive Indices of Corona Viruses through Reverse Calculation
Srinivasan Kuppuswamy,Kaliprasanna Swain,Suryakanta Nayak,Gopinath Palai 한국광학회 2020 Current Optics and Photonics Vol.4 No.6
The present paper computes the refractive indices of different corona viruses (H5N1, H5N2, H9N2, H4N6, FAdV and IBV) through reflectance analysis of a virus solution. The computational analysis indicates that the refractive indices of all viruses are negative at the signal of 412 nm. Further the numerical output shows that the infectious bronchitis viruses (family of novel corona viruses, COVID-19) have higher negative refractive indices as compared to other corona viruses. Finally refractive indices of the family of COVID-19 are investigated with respect to the EID (Electronic infusion Device) concentration of the viruses, showing that the refractive index which ranges from “-0.96725 to -0.999998” corresponds to ‘0.01 to 10000’ EID virus concentration.
Prakash Kuppuswamy,Saeed QY Al Khalidi,Nithya Rekha Sivakumar International Journal of Computer ScienceNetwork S 2024 International journal of computer science and netw Vol.24 No.1
The security of data and information using encryption algorithms is becoming increasingly important in today's world of digital data transmission over unsecured wired and wireless communication channels. Hybrid encryption techniques combine both symmetric and asymmetric encryption methods and provide more security than public or private key encryption models. Currently, there are many techniques on the market that use a combination of cryptographic algorithms and claim to provide higher data security. Many hybrid algorithms have failed to satisfy customers in securing data and cannot prevent all types of security threats. To improve the security of digital data, it is essential to develop novel and resilient security systems as it is inevitable in the digital era. The proposed hybrid algorithm is a combination of the well-known RSA algorithm and a simple symmetric key (SSK) algorithm. The aim of this study is to develop a better encryption method using RSA and a newly proposed symmetric SSK algorithm. We believe that the proposed hybrid cryptographic algorithm provides more security and privacy.
FPGA Implementation of Diode Clamped Multilevel Inverter for Speed Control of Induction Motor
C.L. Kuppuswamy,T. A. Raghavendiran 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.1
This work proposes FPGA implementation of Carrier Disposition PWM for closed loop seven level diode clamped multilevel inverter in speed control of induction motor. VLSI architecture for carrier Disposition have been introduced through which PWM signals are fed to the neutral point seven level diode clamped multilevel using which the speed of the induction motor is controlled. This proposed VLSI architecture makes the power circuit to work better with reduced stresses across the switches and a very low voltage and current total harmonic distortion (THD). The output voltages, currents, torque & speed characteristics for seven level neutral point diode clamped multilevel inverter for AC drive was studied. It has observed the proposed scheme introduces less distortion and harmonics. The results were validated using real time results.
L. Feroz Ali,N. Kuppuswamy,R. Soundararajan,K. R. Ramkumar,S. Sivasankaran 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.12
The goal of the present research is to introduce the Tungsten (W) nanoparticles as reinforcement into Al 6063 alloy to produceAl–W nanocomposites by the FSP technique. The vol% of the reinforcement was varied from 3 to 12 with a step of 3,besides the unreinforced Al matrix was considered as 0 vol% for comparison. The role of W nanoparticles in the Al 6063matrix has been exhaustively investigated using advanced characterization techniques such as XRD analysis to observe thephases, FESEM to detect the distribution of reinforcements with their interparticle spacing and the average grain sizes, TEManalysis to study the strengthening factors, new phase formation at the interface between AA 6063 matrix and W particles,the morphology of the W nanoparticles. The achieved average matrix grains size was 42, 2, and 0.9 μm for 0, 6, and 12vol% W nanocomposites, respectively. The obtained results disclosed the uniform dispersion of W nanoparticles, withoutany agglomeration, and with the absence of intermetallic compounds. The hardness and wear resistance of the fabricatednanocomposites were increased incommensurate with the incorporation of heavy metallic W element as reinforcementparticle; which was due to the proper dispersion of W nanoparticles, refinement of matrix grains to ultrafine level, generationof dislocations, and clear interface between Al 6063 matrix and W nanoparticles. In a nutshell, AA 6063–12 vol% Wnanocomposite has achieved the higher hardness (120 HV), lower wear rate (0.13 mm3/m), and friction coefficient (0.33)than other nanocomposites.
( Gupta ),( Rishikesh Kumar ),( Dinesh Prasad ),( Jaykumar Sathesh ),( Ramachandra Boopathy Naidu ),( Numbi Ramudu Kamini ),( Saravanan Palanivel ),( Marichetti Kuppuswami Gowthaman ) 한국미생물 · 생명공학회 2012 Journal of microbiology and biotechnology Vol.22 No.9
Fish meal grades SL1 and SL2 from Sardine (Sardinella longiceps) and NJ from Pink Perch (Nemipterus japonicas) were evaluated as a sole source of carbon and nitrogen in the medium for alkaline protease production by Bacillus pumilus MTCC 7514. The analysis of the fish meal suggests that the carbon and nitrogen contents in fish meal are sufficient to justify its choice as replacement for other nutrients. Protease production increased significantly (4,914 U/ml) in medium containing only fish meal, compared with the basal medium (2,646 U/ml). However, the elimination of inorganic salts from media reduced the protease productivity. In addition, all the three grades of fish meal yielded almost the same amounts of protease when employed as the sole source of carbon and nitrogen. Nevertheless, the best results were observed in fish meal SL1 medium. Furthermore, protease production was enhanced to 6,966 U/ml and 7,047 U/ml on scaling up from flask (4,914 U/ml) to 3.7 and 20 L fermenters, respectively, using fish meal (10 g/l). Similarly, the corresponding improvement in productivities over flask (102.38 U/ml/h) was 193.5 and 195.75 U/ml/h in 3.7 and 20 L fermenters, respectively. The crude protease was found to have dehairing ability in leather processing, which is bound to have great environmental benefits.