نتایج جستجو برای: مبدل ac به ac

تعداد نتایج: 721635  

2017
David CABALLERO Federico GAVILAN Edgar MAQUEDA Raúl GREGOR Jorge RODAS Derlis GREGOR Sergio TOLEDO Marco RIVERA

This paper proposes an active and reactive power control strategy based on predictive control approaches applied to gridconnected renewable energy systems. To accomplish this a multi-modular matrix converter topologies are used in combination with a simple but efficient grid synchronization strategy. The theoretical performance analysis is performed considering a six-phase wind energy generator...

2003
John Curtin Eliza Hall

In the preceding paper (1) some chemical, antigenic, and biological propert ies of a series of ace toace ty la ted derivat ives of Salmonella adelaide flagellin were described. Several chemical and antigenic tests revealed tha t as flagellin was ace toace ty la ted to increasing extents there was a s teady decline in the affinity of the molecule for anti-flagellin antibodies. This loss in antig...

2003
Jonas Elbornsson Fredrik Gustafsson Jan-Erik Eklund

Time interleaved A/D converters (ADCs) can be used to increase the sample rate of an ADC system. However, a problem with time interleaved ADCs is that distortion is introduced in the output signal due to various mismatch errors between the ADCs. One way to decrease the impact of the mismatch errors is to introduce additional ADCs in the interleaved structure and randomly select an ADC at each s...

2014
Vinod Kumar R. R. Joshi R. C. Bansal

This paper presents the experimental evaluation of reversed indirect matrix converter (MC) interfaced wind energy conversion system (WECS), where space vector pulse width modulation together with adaptive fuzzy logic control is effectively used to enhance the performance of system under various abnormal conditions like abrupt change in wind speed, disconnection from grid, misfire in the convert...

Journal: :SIAM Journal of Applied Mathematics 2009
Stephen M. Cox Stephen C. Creagh

Matrix power converters are used for transforming one alternating-current power supply to another, with different peak voltage and frequency. There are three input lines, with sinusoidally varying voltages which are 120◦ out of phase one from another, and the output is to be delivered as a similar three-phase supply. The matrix converter switches rapidly, to connect each output line in sequence...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت دبیر شهید رجایی - دانشکده برق و کامپیوتر 1391

امروزه کاربرد تجهیزات غیرخطی در شبکه قدرت، رو به افزایش است. این بارها باعث ایجاد اعوجاجات هارمونیکی شده که مشکلات جدی در سیستم قدرت ایجاد می کند. هر چه کاربرد این تجهیزات گسترش یابد، نیاز به وجود یک روش قابل اعتماد برای کاهش هارمونیک ها در مراحل مختلف طراحی، تحلیل و بهره برداری از سیستم های قدرت بیشتر احساس می گردد. از جمله این بارهای غیر خطی، مبدل-های ac به dc (یکسوسازها) می باشند. در این ت...

Journal: :بینا 0
فواد حقی f haghi اهواز- بیمارستان امام خمینی فریدون فرهی f farrahi اهواز- بیمارستان امام خمینی مصطفی فقهی m feghhi اهواز- بیمارستان امام خمینی غلامرضا خاتمی نیا g khataminia اهواز- بیمارستان امام خمینی لیلا حسینی الهاشمی hoseini alhashemi آذر بهزادنژاد behzadnejad

purpose: to determine anterior chamber depth (ac depth) changes during a 6 month period after phacoemulsification cataract surgery and foldable intraocular lens (iol) implantation. methods: in a cross-sectional study, 85 eyes of 85 patients were evaluated for ac depth and capsulo-rrhexis size one and six months after the procedure. results: patients included 44 male and 41 female subjects with ...

2003
Jonas Elbornsson Fredrik Gustafsson Jan-Erik Eklund

Time interleaved A/D converters (ADCs) can be used to increase the sample rate of an ADC system. However, a problem with time interleaved ADCs is that distortion is introduced in the output signal due to various mismatch errors between the ADCs. One way to decrease the impact of the mismatch errors is to introduce additional ADCs in the interleaved structure and randomly select an ADC at each s...

2013
Caroline Ponzoni Carvalho Chanel Florent Teichteil-Königsbuch

We introduce Action-Constrained Partially Observable Markov Decision Process (AC-POMDP), which arose from studying critical robotic applications with damaging actions. AC-POMDPs restrict the optimized policy to only apply feasible actions: each action is feasible in a subset of the state space, and the agent can observe the set of applicable actions in the current hidden state, in addition to s...

2013
R. A. Gupta Rajesh Kumar Virendra Sangtani Ajay Kr. Bansal

Matrix converter is basically direct three phase to three phase converter and it’s operation is based upon switching pattern of all nine switches, which are available in this converter. The output of ac converter is fed as the input of three phase induction motor. The performance of three phase matrix converter fed induction motor drive is analyzed by the switching pattern obtained by matrix co...

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