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Applied Power Electronics Conference and Exposition, 2009. APEC 2009. Twenty-Fourth Annual IEEE

Date 15-19 Feb. 2009

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  • [Copyright notice]

    Publication Year: 2009 , Page(s): ii
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  • Foreword

    Publication Year: 2009 , Page(s): iii - iv
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  • APEC history

    Publication Year: 2009 , Page(s): v
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  • The APEC Conference Committee

    Publication Year: 2009 , Page(s): vi
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  • The sponsors

    Publication Year: 2009 , Page(s): vii
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  • APEC 2009 Program Committee Topic Chairs

    Publication Year: 2009 , Page(s): viii
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  • APEC 2009 Reviewers

    Publication Year: 2009 , Page(s): viii - xiii
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  • APEC 2009 Exhibitors

    Publication Year: 2009 , Page(s): xiv - xv
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  • APEC 2009 Professional Education Seminars

    Publication Year: 2009 , Page(s): xvi - xvii
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  • Announcement and Call for Papers

    Publication Year: 2009 , Page(s): 1 - 2
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  • Table of contents

    Publication Year: 2009 , Page(s): 1 - 35
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  • Opportunities and Challenges in Very High Frequency Power Conversion

    Publication Year: 2009 , Page(s): 1 - 14
    Cited by:  Papers (74)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (954 KB) |  | HTML iconHTML  

    THIS paper explores opportunities and challenges in power conversion in the VHF frequency range of 30-300 MHz. The scaling of magnetic component size with frequency is investigated, and it is shown that substantial miniaturization is possible with increased frequencies even considering material and heat transfer limitations. Likewise, dramatic frequency increases are possible with existing and eme... View full abstract»

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  • The Challenge X Student Engineering Experience

    Publication Year: 2009 , Page(s): 15 - 20
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (372 KB) |  | HTML iconHTML  

    Engineering students from Mississippi State University have successfully competed in a four-year competition among 17 universities throughout North America, Challenge X: Crossover to Sustainable Mobility. With headline sponsorship by the U.S. Department of Energy and General Motors, a Chevrolet Equinox was re-engineered to improve fuel economy, reduce emissions, and increase performance. The compe... View full abstract»

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  • An Optimized 5 kW, 147 W/in3 Telecom Phase-Shift DC-DC Converter with Magnetically Integrated Current Doubler

    Publication Year: 2009 , Page(s): 21 - 27
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (5343 KB) |  | HTML iconHTML  

    In the last decade there has been a tremendous growth in the number of data centers due to the increasing demand for Internet services. At the same time, the cost for energy and materials have increased because of reducing resources and increased demand. That has caused a change in the driving forces for new power supply development, with more consideration on power density and efficiency. The com... View full abstract»

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  • Dynamic Analysis of Three-Port DC/DC Converter for Space Applications

    Publication Year: 2009 , Page(s): 28 - 34
    Cited by:  Papers (15)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1068 KB) |  | HTML iconHTML  

    This paper presents the control structure for a novel three-port converter topology. This topology has the advantage of low switch count, high power density, high efficiency, so it is a valuable choice for space applications. The three port converter for space application interfaces one solar panel input port, one bi-directional battery port and an isolated output port. Lithium-Ion battery charge ... View full abstract»

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  • New Primary-Parallel Boost Converter for High-Power High-Gain Applications

    Publication Year: 2009 , Page(s): 35 - 39
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (649 KB) |  | HTML iconHTML  

    A new simple and low cost method for paralleling multiple power stages in high-power high-gain isolated full-bridge boost converters is presented. A small current balancing transformer and serial connection of transformer secondary windings provides ideal current sharing between paralleled power stages. Effective and safe parallel operation of multiple switching stages can thus be performed. By sp... View full abstract»

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  • A New Interleaved Active-Clamp Forward Converter with Parallel Input and Series-Parallel Output

    Publication Year: 2009 , Page(s): 40 - 44
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (810 KB) |  | HTML iconHTML  

    A new interleaved active-clamp forward converter with parallel input and series-parallel output is proposed in this paper. With the proposed topology the secondary windings of the transformers work in series when the input voltage is low but in parallel when the input voltage is high. Therefore, the duty cycle is not limited within 0.5 and the steady state conversion gain of the converter can be i... View full abstract»

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  • A Novel Optimized Snubber with Time-Varying Capacitor for Synchronous Rectification, Analysis and Implementation

    Publication Year: 2009 , Page(s): 45 - 50
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (481 KB) |  | HTML iconHTML  

    This paper begins by illustrating the issue of switch stresses on synchronous rectifiers (SRs) which happens during the hot plug-in and plug-out operation turn on and off moment of the synchronous rectification in isolated non-regulated Dc-Dc converters, such as the single stage unregulated bus converter. Next, full analysis of the working principle of this unfavorable phenomenon is presented theo... View full abstract»

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  • A Novel 200~800Vdc Ultra-wide Range Input Dc-Dc Converter with Optimum Intelligent Polymorphic Topologies

    Publication Year: 2009 , Page(s): 51 - 57
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    A novel high efficiency polymorphic topology converter whose input range extends to 200~800 Vdc, while the high line input efficiency is still maintained is presented in this paper. By integrated a novel three-level HB L2C converter and a conventional PSFB converter together, the proposed converter intelligently estimate the input voltage condition and automatically change its internal ... View full abstract»

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  • Analysis and Implementation of LLC Burst Mode for Light Load Efficiency Improvement

    Publication Year: 2009 , Page(s): 58 - 64
    Cited by:  Papers (19)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (632 KB) |  | HTML iconHTML  

    Burst mode control is applied to improve light load efficiency of LLC converter in this paper. Detailed analysis on characteristic and operation processes of LLC burst mode control with SR is presented. Based on the analysis, some important rules of LLC burst mode control are proposed, which is the key to achieve high light load efficiency. The rules include: the suitable primary and secondary dri... View full abstract»

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  • A Novel Implementation of an FPGA-Based Controller for Conducted-Noise Reduction in Randomly Switched DC-DC Converters

    Publication Year: 2009 , Page(s): 65 - 69
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (656 KB) |  | HTML iconHTML  

    This paper proposes a novel implementation of an FPGA-Based controller for conducted-noise reduction in dc-dc converters. The switching noise produced by the converter has been reduced by randomly varying the switching frequency of the converter. Traditionally, the implementation of the switching-mode power supply (SMPS) has been accomplished using analog control circuits. However, the field-progr... View full abstract»

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  • Sensorless Current Sharing in Digitally Controlled Two-Phase Buck DC-DC Converters

    Publication Year: 2009 , Page(s): 70 - 76
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (584 KB) |  | HTML iconHTML  

    This paper describes a current sharing technique for digitally controlled two-phase buck DC-DC converters where pulse width and resistance mismatches are digitally compensated to achieve approximately equal current sharing without sensing currents. Effects of various non-idealities on the current sharing performance are discussed and corresponding mitigation techniques are presented. An extension ... View full abstract»

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  • Linear-Non-Linear AVP Control with Larger Inductance for VRM

    Publication Year: 2009 , Page(s): 77 - 82
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3271 KB) |  | HTML iconHTML  

    This paper presents a Linear-Non-Linear AVP Control with larger inductance for VRM applications. As the current ripple will cause conduction and switch related losses, especially when the input voltage gets higher, a larger inductance could reduce the current ripple to improve the efficiency, meanwhile the Linear-Non-Linear Control could avoid the duty saturation caused by large inductance, so as ... View full abstract»

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  • Modeling and Analysis of Coupled Inductors in Power Converters

    Publication Year: 2009 , Page(s): 83 - 89
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (642 KB) |  | HTML iconHTML  

    This paper describes a new approach to the analysis of switched mode power converters utilizing coupled inductors and presents a novel canonical circuit model for N-winding coupled inductors. Waveform and ripple of the winding current in a coupled inductor converter can be easily determined using the developed model similar to those obtained in an uncoupled inductor converter. Influence of couplin... View full abstract»

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  • Design and Roadmap Methodology for Integrated Power Modules in High Switching Frequency Synchronous Buck Voltage Regulators

    Publication Year: 2009 , Page(s): 90 - 96
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (651 KB) |  | HTML iconHTML  

    The proposed methodology encompasses four study phases that address the following key design aspects of integrated power modules (IPM) for voltage regulators: Fundamental switching understanding, determination of compact/accurate loss expressions and derivation of design rules, guidelines and figure of merits for converter optimisation. The applied methods are based on several modelling approaches... View full abstract»

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