IES VIEWER ( PHOTOMETRIC VIEWER )

IESviewer is freeware! The latest release of IESviewer (Version 3.3) is available now!
 IESviewer is the world's most popular photometric viewer. It lets you quickly view, find and convert photometric data files.1 Most of the features present in other viewers are present in IESviewer, including: view photometric curve description of the photometric files luminaire manufacturer luminaire catalog number lamp catalog number lamp description photometric type intensity dimension of luminaire input watts etc Additionally, IESviewer support: unique curve and render realtime thumbnail of photometric files unique navigation by description instead of filename: luminaire manufacturer (MANUFAC) luminaire catalog number (LUMCAT) luminaire description (LUMINAIRE) lamp catalog number (LAMPCAT) lamp description (LAMP) ultra fast preview realtime renderer comparing two photometric curves converting LDT to IES Autodesk 3ds Max integration 3dsmax compatibility indicator and fixing tool available integration with other applications dragging files (copy to explorer, other applications)

1 - The photometric data files (IES, LDT) commonly used by lighting fixture manufacturers to distribute photometric information about their products.
LINK ORIGINAL 
http://www.photometricviewer.com/

OpenCourseWare Electrical Engineering Hanyang University - Seoul, South Korea 전기공학 한양대학교 박관규

1. Transformer의 특성 이해 및 이를 포함한 회로의 해석

A Study on High Quality Single-Phase Seven-Level Grid-Connected Inverter Department of Electrical Engineering Graduate School, Chonnam National University - Le Tuan Vu

(Abstract)
Multilevel inverter technology has emerged recently as a very important alternative in the area of high-power medium-voltage energy control. Multilevel inverters include an array of power semiconductors and capacitor voltage sources, the output of which generate voltages with stepped waveforms. The commutation of the switches permits the addition of the capacitor voltages, which reach high voltage at the output, while the power semiconductors must withstand only reduced voltages. There are three commonly topologies have been proposed for multilevel inverters: diode-clamped (neutralclamped); capacitor-clamped (flying capacitors); and cascaded multicell with separate dc sources. The most attractive features of multilevel inverters are that they can generate output voltages with extremely low distortion, they draw input current with very low distortion and they can operate with a lower switching frequency.
LINK
http://www.mediafire.com/file/4c4wv4gq7t47141/HIGH_QUALITY_SINGLE_PHASE_SEVEN_LEVEL.pdf

A Study of High Resolution Isolated Multi-Level Inverter for Grid-Tie Renewable Generation System by Noh Sik Park Department of Mechatronics Engineering The Graduate School Pukyong National University

A Study of High Resolution Isolated Multi-Level Inverter for Grid-Tie Renewable Generation System 신재생 발전 시스템의 계통 연계를 위한 고정도 절연형 멀티레벨 인버터에 관한 연구 
Advisor: Prof. Soon Jae Kwon 
by Noh Sik Park 
A thesis submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Department of Mechatronics Engineering
The Graduate School Pukyong National University February 2009
 ABSTRACT 
 The objective of this paper is to contribute to the commercialization of high resolution 3 phase multi level inverter that uses new control method which is properto thegreatcapacity inverter used for Grid-tiedRenewable GenerationSystem.Forthispurpose,thebasicoperationprincipleandtypes of the conventional multi level inverter is divided to describe the each merit and demerit, the modulation technique applicable to multi level inverter, the domestic and overseas standard and protecting technology of grid-tied technology which is indispensable to grid-tied inverter. The loss for each factor in 3 phase multi level inverter that uses low-frequency transformer was analyzed with structure of 3 phase multi level, theoretic investigationontheregularspacevectormodulationmethodandanewcontrol technique so as to calculate all loss that may occur in the proposed inverter. Further, this research explained the control technique applied to anti-islanding, an essential function of grid-tied inverter and confirmed outputwaveformandTHDforeachrateofmodulationbyusingMatrap/Simulink so as to check the technical feasibility of multi level inverter using 3 phase low-frequency transformer. As 3 phase multi level inverter in 30kW isolate type was designed, produced and experimented, it was confirmed that the performance which was not inferior to that of the existing 2 level inverter method was embodied. Since there is no particular difficulty in productioncomparedtotheexistingproductswhichareproducedbydepending on many know-hows and less part was technically restricted in producing inverter with capacity larger thanthatof inverter produced forresearch, it presents the possibility of localizing power transformer for Grid-tied RenewableGenerationSystemwhichgetslarger
LINK
http://www.mediafire.com/file/vqs3pl4rkq4ezao/A_Study_of_High_Resolution_Isolated_Multi-Level_Inverter_for_Grid-Tied_Renewable_Generation_System.pdf

Analyse des contraintes mecaniques par la methode des elements finis dans une machine electrique - Mechanical Stress Analysis by the Finite Elements Method in Electric Motor CHANG- HOON JUN Thesis(doctoral)-- L'ecole centrale de Lyon-Genie electrique

Analyse des contraintes mecaniques par la methode des elements finis dans une machine electrique - Mechanical Stress Analysis by the Finite Elements Method in Electric Motor CHANG- HOON JUN Thesis(doctoral)-- L'ecole centrale de Lyon: Genie electrique 1998
 LINK
http://www.mediafire.com/file/szn14jrp6xsl916/09590683.pdf