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Author: search.filters.author.Thepsathorn, P.

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    Item type:Publication,
    New adjustable frequency controlled SPIM drive
    (2000-12-01)
    Tipsuwanporn, V.
    ;
    Numsomran, A.
    ;
    Piyarat, W.
    ;
    Thepsathorn, P.
    ;
    Charean, A.
    This paper presents the methodology of Single Phase Induction Motor (SPIM) speed controlling by Multi frequency and new Binary Rate Multipliers (BRM) technique that gives rise to suitable energy supply to motor at any instant. Knowing the voltage and current, power is calculated by vector space method. The result is feedback to two Proportional-Integral (PI) controllers for processing by means of frequency 40 to 80 Hz and BRM which gives the patterns up to 256 forms. It shows fast time response of returning to normal state, both loading and no load, not exceed 1.0 seconds. The superiority of this technique is that, both apparent and reactive power decrease while running at no load and full load power factor increase up to 0.444 and 0.633 respectively. Thus, higher efficiency is achieved.
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    4-Quadrant DC motor drive control by BRM technique
    (2000-01-01)
    Tipsuwanporn, V.
    ;
    Thepsathorn, P.
    ;
    Piyarat, W.
    ;
    Numsomran, A.
    ;
    Bunjungjit, S.
    The 4 - quadrant dc motor drive control, considered the technique of BRM is proposed on the expectation of fast response. Power and torque control are imposed on both no load and loaded condition. The outcome response time is less than 2.5 seconds, when the resolution of input energy supply is 255 waveforms with scan time of 0.667 milliseconds. The ripple is less than 1%.The control condition of 4-quadrant are operated in quadrant I and IV for forward and reverse rotation and quadrant II and III are for sudden braking by regenerative, resulted in giving reversing time less than 3.5 seconds.