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RISS 인기검색어
- 검색키워드
- 저자 : A. Rathinam (검색결과 3 건)
- 무료
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Rajkumar M.,Rathinam A. 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.1
Single-phase grid-tied inverter is a promising structure for low wattage sustainable Energy systems due to its compact size, fexible operation and lower cost. The traditional system employs a boost converter and a full bridge inverter to pump the energy from sustainable sources to the utility grid. The traditional boost converter has bounded operation in increasing or decreasing the dc voltage from sources like PV modules. The full bridge three-level PWM inverter, on the other hand, increases switching losses, devices with high voltage/current capacity, and electromagnetic interference.This work tries to address the faults highlighted earlier by introducing a modifed reduced switch count Multi-stage Boost Inverter. This setup has two stages, a zeta converter used for limitless operation across the working range and a reduced count multilevel inverter. This setup has ability to boost the input DC voltage with voltage self-balancing and convert to AC voltage. This setup has a current control technique is used to synchronize the inverter output sinusoidal and in-phase with the grid parameters. This technique is also used to control the duty cycle to maintain the required output voltage at converter side. Usefulness of the presented work is analyzed in MATLAB/Simulink and an experimental prototype is constructed to verify the simulated response.
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David A. Ebenezer,Bertha A. D. Rathinam 대한해부학회 2013 Anatomy & Cell Biology Vol.46 No.2
Anatomical variations of the nerves, muscles, and vessels in the upper limb have been described in many anatomical studies; however, the occurrence of 6 variations in an ipsilateral limb is very rare. These variations occur in the following structures: the pectoralis minimus muscle, the communication between the external jugular vein and cephalic vein, axillary arch, the Struthers ligament, the medial, lateral, and posterior cords of the brachial plexus, and the common arterial trunk from the third part of the axillary artery. The relationship of these variations to each other and their probable clinical presentation is discussed.
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Comparison of thermal fatigue behaviour of ASTM A 213 grade T-92 base and weld tubes
G. R. Jinu,P. Sathiya,G. Ravichandran,A. Rathinam 대한기계학회 2010 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.24 No.5
Super-heater tubes are subjected to alternate heating and cooling in power plants causing them to crack and eventually fail. This phenomenon is referred to as “thermal fatigue.” In this paper, a laboratory simulation for reproducing the thermal fatigue phenomenon is developed to determine the number of cycles necessary before failure occurs in super-heater tubes. The temperature and strain distributions along the specimen were computed theoretically using ANSYS software for the applied temperature condition. The thermal fatigue test was conducted for both base and shielded metal arc (SMA) welded tubes separately and both passed in the non-destructive tests. These tubes were subjected to thermal cycles from 800ºC (accelerated temperature) to room temperature. Oxy-acetylene heating setup was utilized as a heating source, and a water bath was utilized for quenching purposes. The tests were carried out until open cracks were identified. Surface cracks were identified in the base and weld tubes after 90 and 60 cycles respectively. This study reveals that heating and cooling cause thermal fatigue, initiate cracks in the tubes.
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