نتایج جستجو برای: بازپخت جریانی dc و ac
تعداد نتایج: 842766 فیلتر نتایج به سال:
We never loaded a long extra high voltage to their thermal limits in order to keep sufficient margin against transient instability. With this scheme proposed in this paper, it is possible to load these lines very near to their thermal limits. Here we inject dc power in to dc transmission line to carry usual ac along with dc superimposed on it. The added power flow does not cause any transient i...
Purpose: The aim of this study is to develop bromhexine hydrochloride 1 %w/v oral solution for veterinary use and to evaluate its stability. Methods: Solutions of Bromhexine hydrochloride (1%w/v) were prepared by dissolving bromhexine hydrochloride in benzyl alcohol at 50 °C then alcohol 96 % v/v; Tween 80 and purified water were added. The obtained solution was filled in amber glass bottles, a...
DC loads (such as computers, data centres, electric vehicle chargers, and LED lamps) and dc distributed energy resources (such as fuel cells, solar photovoltaics, and energy storages) are rapidly growing in electric power systems, so dc systems are being introduced as emerging practical investment solutions compared to traditional ac options. DC microgrids offer several advantages such as the e...
Ac–ac power conversion, the most popular topologies are indirect ac–ac converters with a dc link matrix converters and direct pulse width modulation (PWM) ac–ac converters. The indirect ac–ac converters and matrix converters can provide variable output voltage and variable frequency. However, for applications, where only voltage regulation is needed, the direct PWM ac–ac converters are used to ...
AC losses in cables carrying dc as well as ac transport currents at different dc background fields up to 2T have been measured on three types of Nb,Sn subcables in a new test facility. In this facility it is possible to apply sinusoidal transverse ac fields up to dBldMTls and longitudinal ac fields up to Wdt-JOTls separately and simultaneously. The ac loss is measured with a calorimetric method...
Ž . Ž . w Single crystals of Bi, Pb Sr Ca Cu O T s110 K , prepared by fused-salt reaction technique S.-Y. Chu, M.E. 2 2 2 3 x c Ž . Ž . McHenry, J. Mater. Res. 13 1998 589; S.-Y. Chu, M.E. McHenry, IEEE Trans. Appl. Supercond. 7 1997 1150; S.-Y. Ž . x Chu, M.E. McHenry, Electrochem. Soc. Proc. 97-2 1997 9. , have been characterized by both DC and AC magnetic measurements between 5 K and 108 K w...
شور و داوم اه : 20 لمکم هورگ ود هب یفداصت روط هب ملاس راکشزرو ریغ درم ) ینس نیگنایم اب 1 / 2 ± 2 / 24 لاس ( امنوراد و ) ینس نیگنایم اب 1 / 2 ± 6 / 23 لاس ( دندش میسقت . یندومزآ دنداد ماجنا ار رپوک ندیود هقیقد هدزاود نومزآ ادتبا هورگ ود ره ياه . ریس لمکم هورگ کی هب سپس ) ياه لوسپک لکش هب 500 یمرگ یلیم ( امنوراد رگید هورگ هب و ) لوسپک ياه 500 یلیم زکولگ یمرگ ( هنآ زا و دش هداد زا سپ دش ...
The proposed paper presents the DC/AC microgrid modeling using the Energy storage units and photovoltaic (PV) panels. The modal consists of a two stage power conversion. The power is supplied to the both DC and AC loads by this PV solar panels. The suitable way to explore the PV generation model is by using manufacturer datasheet. A bidirectional converter is connected to the battery storage sy...
BACKGROUND Fetal heart rate (FHR) variability is an indirect index of fetal autonomic nervous system (ANS) integrity. FHR variability analysis in labor fails to detect early hypoxia and acidemia. Phase-rectified signal averaging (PRSA) is a new method of complex biological signals analysis that is more resistant to non-stationarities, signal loss and artifacts. It quantifies the average cardiac...
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