This paper deals with simulation of STATCOM used for harmonic reduction with the aid of multilevel VSI circuit. The harmonics in STATCOM due to the voltage ripple are reduced. As a result, the size of inductor and DC capacitor can be reduced. The STATCOM has the great advantage of a fewer number of devices. The VSI is extremely fast in response to reactive power change. The simulation of the ST...

This paper proposes a three-phase four-wire currentcontrolled Voltage Source Inverter (CC-VSI) for both power quality improvement and PV energy extraction. For power quality improvement, the CC-VSI works as a grid current-controlling shunt active power filter to compensate for harmonic and reactive power of loads. Then, the PV array is coupled to the DC bus of the CC-VSI and supplies active pow...

Introduction. Ferumoxtran is a superparamagnetic iron oxide (SPIO) MRI contrast agent that has been used to estimate blood volume fraction (BV) and the vessel size index (VSI, or average blood vessel diameter) [1] in tumours. The administration of SPIO in blood produces steady-state susceptibility contrast which can be related to BV (proportional to ΔR2* due to contrast injection) and VSI (prop...

Introduction Blood Volume fraction (BVf) and Vessel Size Index (VSI) MR imaging are powerful tools for characterizing tumor microvasculature and its evolution under therapy. BVf and VSI imaging are based on the measurement of the changes in R2 (ΔR2) and in R2* (ΔR2*) induced by a contrast agent (CA) [1]. In brief, two types of CA have been evaluated: iron oxide particles (USPIO), in animals, an...

This paper presents an influence issue improved by victimisation buck-boost convertor for BLDC motor drive as a value effective answer for low power applications. AN approach of speed management of BLDC motor by dominant the DC link voltage of VSI (Voltage supply Inverter) is employed. This facilitates the operation of VSI at fundamental change by victimisation the electronic commutation of BLD...

A new control structure for sensorless induction machine dedicated to electrical drives using a three-level voltage source inverter VSI-NPC is completely analysed. The amplitude and the rotating velocity of the flux vector could be controlled freely. Both fast torque and optimal switching logic could be achieved; the selection is based on the value of the stator flux and the torque. A novel DTC...

In order to evaluate the expression and secretion signals of the highly secreted subtilisin inhibitor of Streptomyces venezuelae CBS762.70 (VSI) for the production of heterologous proteins by Streptomyces lividans, mouse tumor necrosis factor alpha (mTNF) was chosen as a model protein. The mTNF cDNA was fused to the vsi signal sequence. The analysis of secretion by sodium dodecyl sulfate-polyac...