Preview

13 High Efficiency And High Power Factor Single Stage

Powerful Essays
Open Document
Open Document
3577 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
13 High Efficiency And High Power Factor Single Stage
High efficiency and high power factor single-stage balanced forward-flyback converter
Yoon Choi, Moon-Hwan Keum, and Sang-Kyoo Han†

Jeong-il Kang

Power Electronics System Laboratory, POESLA
Kookmin University
Seoul, 136-702, Republic of Korea
E-mail : †djhan@kookmin.ac.kr

Visual Display, R&D Team
Samsung Electronics. Co. Ltd.
Suwon, Republic of Korea
E-mail : jeongil.kang@samsung.com

Abstract— In this paper, a high efficiency and high power factor single-stage balanced forward-flyback converter merging a foward and flyback converter topologies is proposed. The conventional AC/DC flyback converter can achieve a good power factor but it has a high offset current through the transformer magnetizing inductor, which results in a large core loss and low power conversion efficiency. And, the conventional forward converter can achieve the good power conversion efficiency with the aid of the low core loss but the input current dead zone near zero cross AC input voltage deteriorates the power factor. On the other hand, since the proposed converter can operate as the forward and flyback converters during switch on and off periods, respectively, it cannot only perform the power transfer during an entire switching period but also achieve the high power factor due to the flyback operation. Moreover, since the current balanced capacitor can minimize the offset current through the transformer magnetizing inductor regardless of the AC input voltage, the core loss and volume of the transformer can be minimized. Therefore, the proposed converter features a high efficiency and high power factor. To confirm the validity of the proposed converter, theoretical analysis and experimental results from a prototype of 24W LED driver are presented.

between AC input and DC output. Even though the two-stage configuration can provide the high power factor, good output regulation and excellent ripple voltage, it has several significant disadvantages such as a large system size, high cost
of



References: products,” in Proceeding of CAID&CD, pp. 1330-1334, Nov. 2009. Electronics, Vol. 57, No. 2, pp. 735, Feb. 2010. Electromics Annual conference, pp. 167-169, 2009. Apr. 2011. in Proceeding of PESC, vol.2, pp. 754-759, 2001. Proceeding of the IEEE, Vol. 1, pp. 357-362, June. 2001. the ECCE2011, pp. 116-121, Sept. 2011.

You May Also Find These Documents Helpful

  • Satisfactory Essays

    Btec L3 Unit 3 P2

    • 442 Words
    • 2 Pages

    Remember: Each law needs to be described in your own words and then applied to a business that you have chosen. The way you describe it and your business example makes your work unique so please ensure that it is not just copied from the book or cut and paste from the web!…

    • 442 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    P2-UNIT 3 LEVEL 3 BTEC

    • 663 Words
    • 2 Pages

    The purpose of the information is to make sure that parents are made aware of the ‘Ofsted’ inspection that took place on the 19-20 March. They are very important t o schools and really can be a deciding factor in weather they can attract new pupils and keep them on. The parents need to be informed because it means that they keep up to dated with what’s going on and how the school is as a whole from a processionals point of view.…

    • 663 Words
    • 2 Pages
    Good Essays
  • Good Essays

    “Traveling through the Dark” by William E. Stanford and “Woodchucks” by Maxine Kumin a man must make the choice of nature and its ways. Both poems have their similarities and differences. Traveling through the dark and woodchucks share various ways of similarities, Man vs Nature Death situations are involved in both poems. Through the use of narrations both poems have different attitudes.…

    • 388 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    This memo is to inform the company’s areas of biggest concern of the annual report and interesting facts about SM Energy. After researching the company, I discover several interesting facts as follows:…

    • 299 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    Recently the spotlight has been set on renewable energies to assist with weaning off of greenhouse gas emissions, solving issues with energy independence, and to exploit their inherent renewability. Unfortunately our technology is not quite up to speed economically with our wish to rely completely on renewable energy, thus many non-renewable energies are recognized as viable options to power our economy (Fraser, 2011). The United States’ current position on diversifying with non-renewables consists of oil, natural gas, coal, and the less spoken of, nuclear power. Nuclear power is the process by which a reactor contains a slow explosion called fission, which gives off a positive net amount of energy that can be harvested. Of course the social stigma around nuclear is so strong that even if there were an undiscovered completely safe type of nuclear power plant, justifying the complex science would be challenging. After events such as Fukushima, Chernobyl, and Three Mile Island, the vast majority of society believes nuclear energy is nothing more than a death wish. Contrary to popular belief, a safer alternative in nuclear energy has been discovered and has been gaining popularity over the past few years despite the recent tragedy in Japan (Sorensen, 2011). Though newly rekindled, the non-mainstream nuclear power known as Molten Salt Reactor (MSR) was discovered in the 1960’s and had been proved to be a very attractive option to the more popular Light Water Reactor (LWR). It all began with nuclear physicist Alvin Weinberg, who would graduate from the University of Chicago soon become research director at the Oak Ridge National Laboratory (ORNL). Weinberg was given the freedom to experiment with designing multiple types of nuclear reactors including the prominent LWR’s that are in commercial use today. Subsequently Weinberg had noted the potential danger of a LWR and moved on to designing a safer…

    • 1325 Words
    • 6 Pages
    Powerful Essays
  • Powerful Essays

    For 2008 a new class was introduced for Formula Student. Formula Student is a competition between various universities around the UK and around the globe, organised by the Institute of Mechanical Engineers (IMechE). It allows students to design and build single seater formula styled cars in accordance to rules and guidelines set by the IMechE.…

    • 9987 Words
    • 40 Pages
    Powerful Essays
  • Good Essays

    Fuel Systems

    • 968 Words
    • 4 Pages

    In this report I will explain the fuel systems in an automobile. I will cover different parts and how they work. First thing to do is explain how the fuel system works. The purpose of the fuel system is to store and supply fuel to the cylinder chamber where it can be mixed with air then vaporized and burned to produce energy. The fuel, which can be either gas or diesel is stored in a fuel tank. A fuel pump draws the fuel from the gas tank through lines and brings it through a fuel filter. Next it goes to either a carburetor or fuel injector and then delivered to the cylinder chamber for combustion.…

    • 968 Words
    • 4 Pages
    Good Essays
  • Good Essays

    In framing this analysis, you need to compare the merits of the competing alternatives by evaluating how well they correspond to the objectives. In this case, the alternatives the PVT has in mind correlate to better odds potentially, in terms of challenging Solenergy’s evaluation results.…

    • 848 Words
    • 4 Pages
    Good Essays
  • Good Essays

    1. Purpose/Introduction The environment has been in turmoil and the changing global climate has been a political topic in recent years. A major contributor to the changing environment is fuel emissions from personal vehicles. With millions of tons of car emissions being released into the atmosphere, it is obvious that the industry needs to make a change. Many car manufacturers have gone green and produce hybrid or alternative fuel-powered products. Tesla Motors takes the green movement in the personal transportation industry to a whole new level. The Model S is the newest zero-emission product in Tesla’s line. The goal behind all Tesla products is to provide customers with the luxury they desire from any other vehicle while still being socially and environmentally responsible. The preceding marketing plan will provide a situational analysis, product and target market descriptions, marketing objectives, marketing strategy and financial data projections. The goal is to bring awareness and increase market share not only to the Tesla brand but to the Model S specifically. 2. Company Description Silicon Valley based Tesla Motors was founded in 2003 by a group of engineers with a desire to develop an appealing fully electric vehicle. The company is headquartered in Palo Alto, California and just acquired an out-of-business General Motors manufacturing warehouse in Fremont, California. The new warehouse is designed to house a more efficient production process dedicated to the Model S. Tesla’s first product, the Roadster, was released in 2008 and has sold more than 1,500 products in more than 30 countries. Tesla is a vertical manufacturer, meaning that they manufacture and sell directly to end-users via company owned showrooms and website. The company sees itself as a catalyst in the personal transportation industry by…

    • 6115 Words
    • 25 Pages
    Good Essays
  • Powerful Essays

    7. Ali Emadi, Senior Member, Sheldon S. Williamson, Student Member, and Alireza Khaligh, Student Member. Power Electronics Intensive Solutions for Advanced Electric, Hybrid Electric, and Fuel Cell Vehicular Power Systems. Transactions on power electronics, vol. 21, no. 3, may 2006.…

    • 2746 Words
    • 9 Pages
    Powerful Essays
  • Good Essays

    Condensing boilers are the most energy efficient central heating boilers on the market today. They…

    • 527 Words
    • 2 Pages
    Good Essays
  • Better Essays

    India's growing economy and the expansion of its manufacturing industry contribute to the country's increasing dependence on energy. Currently, total installed generation capacity is over 200 GW, and is going to be over…

    • 1229 Words
    • 5 Pages
    Better Essays
  • Satisfactory Essays

    The industry data report package Gas Turbine Markets in Western Europe to 2018 - Market Size, Trends, and Forecasts offers the most up-to-date market data on the actual market situation, trends, and future outlook for gas turbines in Western Europe. The package includes country reports from the following countries:…

    • 564 Words
    • 3 Pages
    Satisfactory Essays
  • Powerful Essays

    Thermal power plant

    • 19674 Words
    • 79 Pages

    Electrical Modeling of a Thermal Power Station Reinhard Kaisinger Degree project in Electric Power Systems Second Level Stockholm, Sweden 2011 XR-EE-ES 2011:010 ELECTRICAL MODELING OF A THERMAL POWER STATION Reinhard Kaisinger Masters’ Degree Project Kungliga Tekniska Högskolan (KTH) Stockholm, Sweden 2011 XR-EE-ES 2011:010 Table of Contents Page ABSTRACT…

    • 19674 Words
    • 79 Pages
    Powerful Essays
  • Satisfactory Essays

    BTEC L3 UNIT 4 P1M1

    • 805 Words
    • 4 Pages

    In this assignment I will be investigating the different types of business information that exist in Apple Inc.…

    • 805 Words
    • 4 Pages
    Satisfactory Essays

Related Topics