نتایج جستجو برای: based switching

تعداد نتایج: 2985832  

Transformerless topologies are widely preferred to use in the grid connected photovoltaic (PV) generation system due to higher efficiency, lower cost and lower weight in comparison with other topologies employing transformer. In this paper, switching losses is minimized by incorporating Zero Voltage Switching (ZVS) in a full-bridge topology, at switch turn-on and an adaptive Variable dead-time ...

Journal: :مهندسی برق مدرس 0
javad olamaei assistant professor of electrical engineering, south tehran branch, islamic azad university, tehran, iran. masoumeh karimi m.sc student in electrical engineering, south tehran branch, islamic azad university, tehran, iran. sahar khalilnasab m.sc student in electrical engineering, azarbaijan shahid mdani university, tabriz, iran.

selective harmonic elimination (she) is a powerful modulation scheme aims to find the required switching angles in order to eliminate the number of undesired harmonics. she is a complicated problem which consists of several nonlinear equations which have multiple local minima. in order to eliminate the higher number of undesired harmonics and as a result reducing the total harmonic distortion (...

Journal: :Inf. Sci. 2007
Fotis N. Koumboulis Robert E. King Anna Stathaki

The present work proposes a new logic-based safe switching technique, called here Stepwise Safe Switching. This technique is based on the description of the process with linear approximants which are valid in operating areas around a finite number of nominal operating points of the process. Switching takes place between common controllers for adjacent nominal operating points. Moreover, the swi...

Journal: :international journal of nanoscience and nanotechnology 2015
h. dallaki m. mehran

quantum-dot cellular automaton (qca) is a novel nanotechnology with a very different computational method in compared with cmos, whereas placement of electrons in cells indicates digital information. this nanotechnology with specifications such as fast speed, high parallel processing, small area, low power consumption and higher switching frequency becomes a promising candidate for cmos technol...

Hamideh Shekari,

Introduction: If the patients are not satisfied with the hospital, this results in switching behavior of patients. In this situation, among different hospitals, the patients choose the hospital with higher level of service quality. So, the main aim of this paper is investigating the effect of hospital's service quality on switching behavior of inpatients in Shahid Sadoughi Hospital of Yazd. Me...

H. Farzanehfard, S. R. Motahari and M.M. Tavasoulkhamseh,

One of the difficulties with PWM switching converters is high switching loss and electromagnetic interference due to switching at non-zero voltage and current, which limits the operating frequency. In order to reduce the converter volume and weight (by increasing the frequency) and reducing switching losses, zero voltage and current switching methods are recommended. In this paper, four main ze...

H. Farzanehfard, S. R. Motahari and M.M. Tavasoulkhamseh,

One of the difficulties with PWM switching converters is high switching loss and electromagnetic interference due to switching at non-zero voltage and current, which limits the operating frequency. In order to reduce the converter volume and weight (by increasing the frequency) and reducing switching losses, zero voltage and current switching methods are recommended. In this paper, four main ze...

A Khodayari S Hatam, S Mohammadi

One of the best vibration control methods using smart actuators are semi-active approaches which are as strong as active methods and need no external energy supply such as passive ones. Compared with piezoelectric-based, magnetostrictive-based control methods have higher coupling efficiency, higher Curie temperature, higher flexibility to be integrated with curved structures and no depolarizati...

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