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IEEE Power Electronics Letters

Issue 1 • Date March 2005

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Displaying Results 1 - 14 of 14
  • 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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  • PWM methods to handle time delay in digital control of a UPS inverter

    Publication Year: 2005, Page(s):1 - 6
    Cited by:  Papers (25)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB) | HTML iconHTML

    With the popularity of micro-processors, digital controllers are widely used in uninterruptible power supply (UPS) inverters. These digital control systems of UPS inverters require a time interval for sampling and computation, which sometimes affects the performance of inverters. In this paper, the problem of time delay in digital control of a UPS inverter is discussed. Then two novel pulsewidth m... View full abstract»

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  • Modeling the sequential switching shunt series regulator

    Publication Year: 2005, Page(s):7 - 13
    Cited by:  Papers (15)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB) | HTML iconHTML

    This letter characterizes, in terms of the bandwidth and limit cycle frequency of its constituent subsystems, the sequential switching shunt series regulator -S4R, a high-efficiency, low-mass and volume power cell devised to power the next generation of regulated power buses in telecommunication spacecrafts. Transconductance power source modeling is used to obtain linear and nonlinear m... View full abstract»

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  • Improved voltage clamping scheme for ZVS PWM three-level converter

    Publication Year: 2005, Page(s):14 - 18
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB) | HTML iconHTML

    This paper proposes an improved zero-voltage-switching pulsewidth-modulation (ZVS PWM) three-level converter, which is improved from the original ZVS PWM three-level converter by merely exchanging the position of the resonant inductance and the transformer, such that the transformer is connected with the lagging switches. The improved converter has several advantages over the original, e.g., the c... View full abstract»

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  • A nonlinearity compensation method for a matrix converter drive

    Publication Year: 2005, Page(s):19 - 23
    Cited by:  Papers (23)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB) | HTML iconHTML

    This paper presents a new method to compensate the nonlinearities for matrix converter drives. The nonlinearities of matrix converter drives such as commutation delay, turn-on and turn-off time of the switching devices, and on-state switching device voltage drop is corrected by a new matrix converter model using the direction of current. The proposed method does not need any additional hardware or... View full abstract»

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  • A constant-frequency method for improving light-load efficiency in synchronous buck converters

    Publication Year: 2005, Page(s):24 - 29
    Cited by:  Papers (70)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB) | HTML iconHTML

    The low-voltage synchronous rectifier buck topology suffers from low efficiency at light loads due to dissipation that does not scale with load current. In this paper we present a method for improving light-load efficiency in synchronous buck converters by reducing gate drive losses. We propose a new gate drive technique whereby the gate voltage swing dynamically scales with load current such that... View full abstract»

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  • A three-phase symmetrical multistage Voltage multiplier

    Publication Year: 2005, Page(s):30 - 33
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB) | HTML iconHTML

    A three-phase symmetrical Cockcroft-Walton (CW) multistage voltage multiplier (VM) is proposed. It consists of one smoothing column and six oscillating columns. The oscillating columns are connected to three-phase power through center-tap transformers. The capacitors of the smoothing column are charged six times per cycle by six oscillating columns and are discharged six times through the load, un... View full abstract»

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  • A lamp power control scheme for dimmable electronic ballasts to minimize the temperature effect on the lamp brightness

    Publication Year: 2005, Page(s):34 - 39
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB) | HTML iconHTML

    A hybrid lamp power control scheme for dimmable electronic ballasts is proposed. Apart from adjusting the brightness of the lamp, the proposed method can also minimize the ambient temperature effect on light output. Instead of regulating the lamp current, the proposed method is based on regulating the power supplying the lamp. First, the dimming operation is achieved by regulating the dc voltage a... View full abstract»

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  • Erratum to "Variable-frequency predictive digital current mode control"

    Publication Year: 2005, Page(s): 40
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (20 KB) | HTML iconHTML

    In the above-named letter [ibid., vol. 2, pp. 113??16, Dec. 2004], the title of Section II was incorrectly edited. It should have read "Control in CCM." View full abstract»

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  • IEEE Power Electronics Letters Information for authors

    Publication Year: 2005, Page(s):41 - 42
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  • IEEE copyright form

    Publication Year: 2005, Page(s):43 - 44
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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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