چکیده - کم بود ولتاژ رایج ترین پدیده در سیستم های توزیع برق می باشد. وقوع کم بود ولتاژ ممکن است باعث آسیب جدی برای مراکز بار حساس، صنایع با اتوماسیون و تجهیزات حساس بشود. جبران کننده دینامیکی کم بود ولتاژ وسیله ای است که می تواند با تزریق ولتاژ به صورت سری به شبکه، ولتاژ بار را جبران کرده و شرایط عمل کرد مناسبی را برای آن فراهم نماید. در این مقاله، ساختار جدیدی برای جبران کننده دینامیکی کم بود ...

OBJECTIVES MicroRNA (miRNA)-related single-nucleotide polymorphisms (SNPs) in miRNA processing machinery genes can affect cancer risk, treatment efficacy, and patient prognosis. A miR-SNP of rs11077 located in the 3' untranslated region (3' UTR) of the miRNA processing machinery gene XPO5 was examined in 112 advanced non-small-cell lung cancer (NSCLC) patients to evaluate its association with c...

The involvement of adrenergic signaling and sarcoplasmic calcium regulatory proteins in the development of heat acclimation-induced adaptations in cardiac mechanics was studied in heat-acclimated (34 degrees C) rats for 2, 5, and 30 days (AC(2), AC(5), and AC(30), respectively). Control (C) rats were held at 24 +/- 1 degrees C. Systolic pressure (LVP) and velocities of contraction (dP/dt/P) and...

This study investigated the status of mechanized power and self-propelled rice cultivation machinery in Guilan Province in northern Iran. The raw data was obtained from 2013 statistics of the Agricultural Jihad Organization of Guilan province. Power per unit of area, mechanization level, area per unit of self-propelled machinery, and mechanization requirement were calculated for eastern, wester...

This research deals with investigations on the “Active Generator” under rotor speed variations and output frequency control. It runs at turbine speed and it is connected to a three phase electrical power grid which has its own frequency different from turbine frequency. In this regard the set composed of a four phase synchronous generator and a natural commutated matrix converter (NCMC) made wi...

This paper proposes a three phase transformerless AC/AC converter which can perform both buck and boost operations based on the voltage requirements. This AC/AC converter is mainly proposed for the three phase induction motor drives with the intention to reduce the high inrush current of the conventional motor used in industrial applications. The merits of the proposed AC/AC converter can be un...

The aim of this paper is to describe work involved in investigations on the implementation of single phase matrix converter (SPMC) as an AC-AC converter subjected to passive load conditions. The successful implementation of the SPMC had been conceived, designed and realized by synthesizing the output using the well known sinusoidal pulse width modulation (SPWM) technique with IGBTs as power swi...