Jangwanitlert, Anuwat

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Preferred name
Jangwanitlert, Anuwat
Alternative Name
Jangwanitlert, A.
Main Affiliation
Email
anuwat.ja@kmitl.ac.th

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    Item type:Publication,
    A PSPWM with variable frequency control for a two-output three-level series resonant inverter
    (2015-08-17)
    Meesrisuk, Watanyu
    ;
    Jangwanitlert, Anuwat
    ;
    Suwan-Ngam, Warachart
    This research paper presents a two-output three-level series resonant inverter by using phase-shifted pulse width modulation with a variable frequency control technique. In order to achieve the boundary condition of operation under ZVS for all switches, this paper will analyze this condition which depends on operating frequency and phase-shifted angle between the gate signals of the outer switches and the inner switches. In addition, the proposed circuit was designed, built and tested. The test has two cases which include fixed frequency control and variable control method. From the experiment, the fixed frequency control cannot obtain the ZVS condition of switches for all phase-shifted angle values. On the other hand, the variable frequency control can maintain the ZVS condition for all phase-shifted angle values that is in line with the proposed concept.
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    A novel symmetrical two-output three-level series resonant PSPWM inverter
    (2015-01-26)
    Meesrisuk, Watanyu
    ;
    Jangwanitlert, Anuwat
    This paper presents a two-output three-level inverter (a TOTL inverter) by using phase-shifted pulse-width modulation (PSPWM) to achieve the symmetrical output waveforms. A TOTL inverter is made of 3-legs of neutral point clamped inverter [1] which can provide two-output per one circuit. This is a concept to reduce a size and a number of components when it is compared with one output per one circuit. A TOTL inverter can be adjusted for output power by shifting PSPWM signals. In addition, all switches can operate under zero-voltage-switching condition (ZVS). This paper shows the analysis of operation modes, the simulation, and experimental results in order to prove the proposed concept. It is found that the proposed inverter can provide the rated power of 974 kW and 1140kW for each output, overall efficiency of 85.7% at switching frequency of 50 kHz.