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Subject: search.filters.subject.Ac-dc converter

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    Item type:Publication,
    The technique to generate firing signal of converter for linear DC output
    (2008-12-01)
    Thepmanee, Teerawat
    ;
    Pongswatd, Sawai
    ;
    Ukakimapurn, Prapart
    ;
    Tirasesth, Kitti
    The firing angle adjustment of ac-dc converter that adjust firing angle proportional to control signal. The dc output voltage is not linear. This paper presents the technique to generate the firing signal for ac-dc converter which has linear dc output voltage. This technique decoded the arccosine value as binary data and save in ROM, before compare with control signal. All digital circuits and ROM were constructed using Field Programmable Gate Array (FPGA) and Verilog Hardware Description Language (Verilog HDL) so that the proposed technique has small size and ease of implementation. The experimental results show the dc output voltage and output waveform that agree with the design. Moreover, this technique can be applied to multi-output for dual converter and 3- phase system. © 2008 SICE.
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    Enhanced control design of single phase AC-DC converter using power balance calculator
    (2004-12-01)
    Tipsuwanporn, V.
    ;
    Intajag, S.
    ;
    Tarasantisuk, C.
    ;
    Tunyasrirut, S.
    A single phase ac-dc converter with unity power factor (UPF) have been proposed in this paper. The hysteresis current control scheme is employed to track the line current command while the control signal of the four power switches are derived from the Power Balance Calculator (PBC) for achieving a fast response, high power factor during steady state operation with a constant load. The proposed control scheme and the circuit configuration can be applied to the three phase converter to eliminate the harmonic currents from the nonlinear load.
      1