* لوئسم هدنسيون : تسراميب ،رفظ ،سردم نا رغصا يلع ) ع ( نفلت : 9 44503395 email: [email protected] فده و هنيمز : هچب رد يناجيه و يراتفر تلاكشم هسياقم شهوژپ نيا زا فده اب ردام يتسرپرس تحت دلاو كت ياه هداوناخ ينيمخ ماما دادما هتيمك رد دلاو ود ياه ) هر ( تسا نارهت . لثم يمئلاع يراتفر تلاكشم زا روظنم زا روظنم و تسا يعامتجا تلاكشم و يراكهزب ،يرگشاخرپ و بارطضا ،يگدرسفا لثم يمئلاع يناجيه ...

The double conversion circuits are widely used as motors drivers, UPS’s, Active filters, etc. As its name indicates, there are two types of conversions in this system, the AC/DC and the DC/AC conversion. In this paper the results obtained of the implementation of a double conversion system AC/DC/AC are presented. For the AC/DC conversion a topology with power factor correction (PFC) is used, wh...

This paper addresses the static and dynamic stabilities of a parametrically excited torsional micro-actuator. The system is composed of a rectangular micro-mirror symmetrically suspended between two electrodes and acted upon by a steady (dc ) while simultaneously superimposed to an (ac ) voltage. First, the stability of the system subjected to a quasi-statically applied (dc ) voltage is investi...

We analyze the current dynamics of a superlattice Bloch oscillator under conditions where, in addition to the dc bias field causing a negative differential ac conductivity, a similarly strong ac field is present, at a frequency somewhat below the Bloch frequency associated with the dc field. The differential conductivity at the ac drive frequency is then negative, but, because of the strong non...

This paper presents the comparative analysis of improved quality three phase AC/DC boost converters, using SIMULINK. Comparison of three phase controlled single switch and six switch AC/DC boost converters have been done to identify the boost converter with low cost/small size/high efficiency for three phase system. Three phase AC/DC boost converters with improved quality in terms of power fact...

کچ هدي پ شي مز هني فده و : شزومآ لاب يني شخب ساسا ي شزومآ مهم و راتسرپ ي تسا . و هنوگ ره دوج لکشم ي شزومآ رد لاب يني ، آراک يي هدزاب و ا ني شزومآ زا شخب راچد ار لکشم م ي دنک . فده اب رضاح شهوژپ سررب ي لماوع سرتسا از ي شزومآ لاب يني رد وجشناد ناي راتسرپ ي هدکشناد راتسرپ ي و يامام ي ماـجنا داـبآ مرـخ تسا هتفرگ . شور و داوم راک : رضاح هعلاطم کي هعلاطم صوت يفي عطقم ي تسا . د...

We have developed a new isolated AC/DC converter for electric vehicle on-board chargers. It consists of an AC/DC converter with Gradationally Controlled Voltage Inverter (GCVI AC/DC converter) and an isolated Zero-Voltage-Switching (ZVS) DC/DC converter, each of which is optimally controlled to convert in a highly efficient means. As a result, the new on-board charger has achieved a power conve...

A novel online capacitance estimation method for a DC-link capacitor in a three-phase AC/DC/AC PWM converter is prepared. At no load, a controlled AC current with a lower frequency than the line frequency is injected into the input side, which then causes AC voltage ripples at the DC output side. By extracting the AC voltage and current components on the DC output side using digital filters, th...

Abstract: Interest in DC microgrids is rapidly increasing along with the improvement of DC power technology because of its advantages. To support the integration process of DC microgrids with the existing AC utility grids, the form of hybrid AC/DC microgrids is considered for higher power conversion efficiency, lower component cost and better power quality. In the system, AC and DC portions are...