Informatics Publishing Limited

M. Subhashini ¹, P. Latha ², M. A. Bhagyaveni ³

Affiliations
1 Department of Applied Electronics, St. Joseph’s College of Engineering, Chennai-600119, Tamil Nadu, IN
2 Department of ECE, St. Joseph’s College of Engineering, Chennai-600119, Tamil Nadu, IN
3 Department of ECE, Anna University, Chennai-600025, Tamil Nadu, IN

Abstract

Background/Objectives: Multilevel Inverters are growing technology, even there are many topologies available in real world, here new multilevel topologies such as diode clamped multilevel inverter and cascaded-H-bridge inverter are discussed and comparative results for lower total harmonic distortion are analysed. Methods/Statistical Analysis: Neutral point diode clamped inverter is analysed and its total harmonic distortion value is calculated. Cascaded H-Bridge (CHB) 7 level inverter is analysed and then simulated, finally it is verified using FPGA controller. Three H-bridges are seriously connected to produce 7 level output voltage, FPGA controller uses Sinusoidal Pulse Width Modulation (SPWM) to produce pulse pattern for H-bridges. Results: This topology is tested in Matlab/Simulink environment. Total Harmonic Distortion (T.H.D) value of 7 level voltages is seen as a 30.33%. Which is very low as compared with 3 phase diode clamped five level inverter (81.7%). Conclusion/Application: Solar Photo Voltaic system is employed to compete the disadvantages of conventional energy sources and resulted in energy conservation system that reduces power consumption.

Keywords

Cascaded H-Bridge, FPGA Controller, Multilevel Inverter, Sinusoidal Pulse Width Modulation, Total Harmonic Distortion

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S. Arul Murugan ¹, M. A. Bhagyaveni ¹, A. K. P. Kovendan ¹

Affiliations
1 Department of Electronics and Communication Engineering, College of Engineering Guindy, Anna University, Chennai-25, IN

Abstract

Cloud computing enable extremely scalable services to be easily consumed over the Internet on an as-needed basis. A most important characteristic of the cloud services is that users' information are frequently processed somewhat in unknown machines that users do not own or operate. While enjoying the convenience bring by this novel emerging technology, users' worries of losing control of their own data (chiefly, economic and physical condition data) can become a important barrier to the wide adoption of cloud services. To take in hand this problem, in this paper, we propose a new highly decentralized information accountability construction to keep track of the actual usage of the users' data in the cloud. In particular, we recommend an object-centered approach that enables enclosing our logging mechanism together with users' information and policy. We influence the JAR programmable capabilities to in cooperation generate a active and travelling object, and to ensure that any right of entry to users' data will trigger confirmation and automated logging local to the JARs. To strengthen user's control, we also offer distributed auditing mechanisms. We supply extensive experimental studies that demonstrate the efficiency and effectiveness of the planned approaches.

Keywords

Distributed Cloud Server, JAR, Logger, AES, Encryption, Userlogs, Pull, Push.

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