نتایج جستجو برای: voltage high
تعداد نتایج: 2133910 فیلتر نتایج به سال:
many mobile and off-grid devices include electronics and other electrical consumers like servo drives, which need a quite low supply power. since the price for photovoltaic modules drops continuously, photovoltaic power supply is interesting in more and more applications. in solar powered systems, a battery is needed to store energy for the night and cloudy periods. the power electronics of suc...
In this paper, a DC-DC resonant converter with high voltage gain and small size is studied. To reduce the size and weight of this converter, the operating frequency should be as high as possible. In this research, the frequency changes from 120 to 200 kHz. Due to the high operating frequency, it is necessary to reduce the switching losses using soft switching methods. Resonant converters are su...
In this paper, a DC-DC resonant converter with high voltage gain and small size is studied. To reduce the size and weight of this converter, the operating frequency should be as high as possible. In this research, the frequency changes from 120 to 200 kHz. Due to the high operating frequency, it is necessary to reduce the switching losses using soft switching methods. Resonant converters are su...
در رساله حاضر ابتدا پلی اتیلن(ldpe) به دو روش سیلانی و پراکسیدی شبکه ای گردید که پارامترهای الکتریکی نظیر ثابت ، اتلاف دی الکتریک و استحکام شکست xlpe حاصل حاکی از مناسب بودن آمیزه برای عایق کابلهای با ولتاژ ضعیف و متوسط بود. به منظور بهبود خواص مکانیکی و استحکام شکست ، ldpe را با کوپلیمرهای اتیلنی نظیر اتیلن متیل اکریلات و اتیلن وینیل استات در دستگاه رول میل و برابندر اختلاط و سپس شبکه گردید که...
the effect of high voltage, high frequency pulsed electromagnetic field on slain ovine cortical bone
background: this study is the first research investigating the possible effect of pulsed power signals on the characteristics of cortical bone by comparing the mechanical properties of this type of bone pre and post expose to pulsed power. methods: a positive buck-boost converter was applied to generate adjustable high voltage, high frequency pulses (up to 500 v and 10 khz). the functional beha...
This paper presents a detailed small-signal and transient analysis of a full bridge PWM DC-DC converter designed for high voltage, high power applications using an average model. The derived model is implemented in a typical system and used to produce the small-signal and transient characteristics of the converter. Results obtained in the analysis of the high voltage and high power design examp...
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