نتایج جستجو برای: dc بو

تعداد نتایج: 56851  

2014
Matti Liukkonen Ari Hentunen Jussi Suomela

This paper presents efficiency analysis of the power buffering in common voltage bus systems. Operation of the power buffering is briefly described with the power control experiments. The efficiency measurement setup and performed measurements from the charging and discharging events of the ultracapacitor module with the dc-dc converter are presented. As a result, the efficiency map of the dc-d...

Journal: :IBM Journal of Research and Development 1983
Albert X. Widmer Peter A. Franaszek

In this paper, an 8b/10b encoding serializer/deserializer (SerDes) circuit using a DC-balanced, partitioned block, 8b/10b transmission code was presented. The information format of this transmission code consists of packets which are variable in length and can be suitable for high speed applications. Serializer and deserializer blocks were designed separately. The serializer circuit gets the 8-...

Journal: :IEICE Transactions 2011
Xin Zhang Yu Pu Koichi Ishida Yoshikatsu Ryu Yasuyuki Okuma Po-Hung Chen Takayasu Sakurai Makoto Takamiya

In this paper, a novel switched-capacitor DC-DC converter with pulse density and width modulation (PDWM) is proposed with reduced output ripple at variable output voltages. While performing pulse density modulation (PDM), the proposed PDWM modulates the pulse width at the same time to reduce the output ripple with high power efficiency. The prototype chip was implemented using 65 nm CMOS proces...

2015
M. Gopichand Naik

---------------------------------------------------------------------***--------------------------------------------------------------------Abstract The interconnection of small modular devices such as photovoltaic, small wind turbines and storage devices ,commonly storage batteries to a Low Voltage distribution system leads to a new energy system known as the Microgrid. This paper presents the...

2015
M. Radha J. Srinivasa Rao

Conventional voltage mode control only offers limited performance for LLC series resonant DC-to-DC converters experiencing wide variations in operational conditions. When the existing voltage mode control is employed, the closed-loop performance of the converter is directly affected by unavoidable changes in power stage dynamics. Thus, a specific control design optimized at one particular opera...

2017
Subramani Saravanan Neelakandan Ramesh Babu

A non-isolated high voltage gain DC-DC converter has been presented in this paper. The boost, SEPIC and modified SEPIC converters were nalyzed and their performance was compared with the proposed converter. The proposed converter has been designed for the input voltage of 5 V and an output voltage of 150 V with 100 W output power. The efficiency of the converter obtained was 92.5%, which is hig...

1999
Gregory Ivensky Moshe Shvartsas Sam Ben-Yaakov

Abs t rac t -Piezoelectric transformers (PZT) can be used advantageously in high output voltage DC-DC converters . In such applications the output section includes a vol tage doubling rectification scheme to help increase the output voltage. This topology was modeled and analyzed by considering the expected voltage and current waveforms under the first harmonics approximation. The results were ...

Journal: :SIAM Journal on Optimization 2011
Philipp Rostalski Ioannis A. Fotiou Daniel J. Bates A. Giovanni Beccuti Manfred Morari

A new technique for solving polynomial nonlinear constrained optimal control problems is presented. The problem is reformulated into a parametric optimization problem, which in turn is solved in a two step procedure. First, in a pre-computation step, the equation part of the corresponding first order optimality conditions is solved for a generic value of the parameter. Relying on the underlying...

2013
Neetu Sharma Rahul Dubey

The main objective of this paper is to compare the performance between fuzzy controller and proportional integral controller in improving the performance of the DC-DC Buck Converter. The evaluation of the output has been carried out and compared by software simulation using MATLAB. This paper also evaluates the stability of the system with fuzzy controller and PI controller and concludes that t...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه محقق اردبیلی - دانشکده علوم کشاورزی 1391

این آزمایش به منظور بررسی تاثیر غلظت های مختلف اسید هیومیک (0، 100، 500 و 1000 میلی گرم در لیتر) و زمان های مختلف محلول پاشی (به صورت هر 1، 2، 3 و 4 هفته یکبار محلول پاشی) بر رشد و گلدهی گل بریده شب بو "رقم hanza" به صورت فاکتوریل در قالب طرح کاملا تصادفی با 7 تکرار در هر تیمار صورت گرفت. نتایج حاصل از تجزیه واریانس داده ها در گیاهان مورد بررسی اختلاف معنی داری را در تعداد برگ، ارتفاع گیاه و می...

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