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IEEE Power Electronics Letters

Issue 4 • Dec. 2005

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Displaying Results 1 - 15 of 15
  • Table of contents

    Publication Year: 2005, Page(s): c1
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  • IEEE Power Electronics Letters publication information

    Publication Year: 2005, Page(s): c2
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  • Single-phase Z-source PWM AC-AC converters

    Publication Year: 2005, Page(s):121 - 124
    Cited by:  Papers (81)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB) | HTML iconHTML

    The letter proposes a new family of simple topologies of single-phase PWM ac-ac converters with a minimal number of switches: voltage-fed Z-source converter and current-fed Z-source converter. By PWM duty-ratio control, they become "solid-state transformers" with a continuously variable turns ratio. All the proposed ac-ac converters in this paper employ only two switches. Compared to the existing ... View full abstract»

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  • Thermal design based on surface temperature mapping

    Publication Year: 2005, Page(s):125 - 129
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB) | HTML iconHTML

    A method of extracting a conservative thermal model from an existing PCB assembled converter is investigated. This improves upon thermal management by increasing the thermal management contribution of the PCB itself. A thermal calibration loop is proposed in which a given converter is analyzed and data extracted, in order to create a thermal map of the surface temperature from which the component ... View full abstract»

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  • Implementation of pulse-width-modulation based sliding mode controller for boost converters

    Publication Year: 2005, Page(s):130 - 135
    Cited by:  Papers (51)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB) | HTML iconHTML

    This letter addresses the various issues concerning the implementation of a pulse-width modulation (PWM) based sliding mode (SM) controller for boost converters. The methods of modeling the system and translation of the SM control equations for the PWM implementation are illustrated. It is shown that the control technique is easily realized with simple analog circuitries. Various experiments are c... View full abstract»

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  • Modeling of capacitor impedance in switching converters

    Publication Year: 2005, Page(s):136 - 140
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB) | HTML iconHTML

    Switched capacitor (SC) converters are gaining acceptance as alternatives to traditional, inductor-based switching power converters. Proper design of SC converters requires an understanding of all loss sources and their impacts on circuit operation. In the present work, an equivalent resistance method is developed for analysis, and equivalent resistance formulae are presented for various modes of ... View full abstract»

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  • A passive auxiliary circuit achieves zero-voltage-switching in full-bridge converter over entire conversion range

    Publication Year: 2005, Page(s):141 - 143
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB) | HTML iconHTML

    A passive auxiliary circuit is proposed to achieve zero-voltage-switching (ZVS) over the entire conversion range in a full-bridge (FB) pulse-width modulated (PWM) converter (FBZVS converter) with minimum conduction loss penalty. The stored energy in the auxiliary circuit is minimal under the full-load condition. It increases progressively as the load current decreases. The proposed auxiliary circu... View full abstract»

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  • Interpreting small signal behavior of the synchronous buck converter at light load

    Publication Year: 2005, Page(s):144 - 147
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB) | HTML iconHTML

    The pulse-width-modulation (PWM) buck converter with synchronous rectifiers operating at light load is usually modeled by its continuous conduction mode (CCM) model. However, the actual power-stage small-signal control-to-output response shows a different behavior from what the traditional CCM model predicts, specifically, more damping around the double-pole frequency, instead of more resonance. T... View full abstract»

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  • Synthetic-ripple modulator for synchronous buck converter

    Publication Year: 2005, Page(s):148 - 151
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB) | HTML iconHTML

    Comprising a hysteretic comparator and a ripple synthesizer, the synthetic-ripple modulator (SRM) allows voltage-hysteretic modulation to be realized in low-voltage buck converters where the natural voltage ripple is too small for reliable hysteretic operation. Circuit implementation, steady-state operation, and design equations are described for an SRM controlling a buck dc-dc converter. The basi... View full abstract»

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  • Correction to "Buck or Boost Tracking Power Converter"

    Publication Year: 2005, Page(s): 152
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  • IEEE Power Electronics Letters Information for authors

    Publication Year: 2005, Page(s):153 - 154
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  • 2005 Index

    Publication Year: 2005, Page(s):155 - 159
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  • Order form for reprints

    Publication Year: 2005, Page(s): 160
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  • IEEE Power Electronics Society Information

    Publication Year: 2005, Page(s): c3
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  • IEEE Power Electronics Letters blank page

    Publication Year: 2005, Page(s): c4
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