Boonkhun, Churirat

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Preferred name
Boonkhun, Churirat
Alternative Name
Boonkhun, Churirut
Main Affiliation
Email
churirat.bo@kmitl.ac.th

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    Item type:Publication,
    Research of Magnetic and Electric Fields to Design and Develop the Prototype of Magnetic Resonance Imaging Device
    (2025-01-01)
    Chompoo-Inwai, Chai
    ;
    Chompoo-Inwai, Chow
    ;
    Suksathit, Witchayaphorn
    ;
    Kaewpromrat, Weerapat
    ;
    Maneerat, Saranyu
    This research presents a study and preliminary design of a main magnetic field generation system for an MRI machine using simulation software. The objective is to investigate the factors affecting magnetic field strength. Six coil models were preliminarily designed and simulated to analyze the magnetic field behavior. Simulation results were compared with experimental magnetic field measurements, showing that the software accurately reproduces the magnetic field. It was found that distributed winding improves field uniformity, and that both the number of coil turns and conductor size directly affect the strength of the main magnetic field in the air core.Based on the simulation outcomes, a prototype magnetic field generation system was designed. The proposed prototype consists of an aluminum core with a diameter of 110 mm and a height of 335 mm, suitable for arm imaging. The system uses a superconducting NbTi wire wound 6,516 turns in eight segments, with a current of 120 A. Cooling is achieved using a cryocooler model RDE-418D4 4K, which can reach temperatures as low as 4.2 K. This study provides essential guidance for the development of main magnetic field systems in future MRI devices.
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    Item type:Publication,
    A novel transmission line's atc assessment method by considering the Generation Dispatch limit (GDL) and renewable generation capacity with power flow sensitivity analysis
    (2019-01-01)
    Wannoi, Chaisit
    ;
    Wannoi, Narumon
    ;
    Boonkhun, Churirut
    ;
    Temiyasathit, Chivalai
    ;
    Chompoo-Inwai, Chai
    This paper presents a novel transmission line's Availability Transfer Capability (ATC) assessment method by considering the Generation Dispatch Limit (GDL) and renewable generation capacity. This method has calculated the power remaining from the Total Transfer Capability (TTC). The TTC in this study is the total generation available declaration of all maximum Generation Shift Factor (GSF) generations to transfer power on transmission line depended on the Power Purchase Agreement of each power generation and of each renewable generation integrated in the system. The maximum GSF generations are defined by using the power sensitivity analysis. Results of this novel method are compared with the traditional transmission line's thermal limit method. Main findings showed that newly proposed method for ATC calculation can be used for the ATC assessment of transmission line and can be a good predictive index to protect power system's voltage stability issue. Moreover, it can be applied to the congestion management scheme with the optimal primary respond generation to control the stability of power transfer on the transmission line.