Phophongviwat, Teeraphon

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Phophongviwat, Teeraphon
Alternative Name
Phophongviwat, T.
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Email
teeraphon.ph@kmitl.ac.th

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    EV Charging Station Planning Based on Nearby Station Data
    (2024-01-01)
    Somboonpanya, Nattapon
    ;
    Ketjaem, Supakorn
    ;
    Khomfoi, Surin
    ;
    Phophongviwat, Teeraphon
    ;
    Thounthong, Phatiphat
    This paper presents the optimal electric vehicle charging station installation planning, focusing on the installation scenarios where the location is pre-selected. The optimization process includes the maximum charging power capacity and the number of electric vehicles charging stations. Energy consumption information from nearby charging stations is harvested and then analyzed for forecasting the energy supply behavior of each charging station. This paper has a financial analysis to evaluate the cost-effectiveness of each installation scenario. Additionally, this methodology is demonstrated through the real-world data of charging patterns from electric vehicles at each charging station in Thailand.
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    CC-CV Charging Control Based on Modified Hamiltonian Control Law for EV Application
    (2024-01-01)
    Somboonpanya, Nattapon
    ;
    Khomfoi, Surin
    ;
    Phophongviwat, Teeraphon
    ;
    Jamshidpour, Ehsan
    ;
    Thounthong, Phatiphat
    This paper proposes constant current-constant voltage (CC-CV) charging control based on Hamiltonian control law with a state observer for a bidirectional buck-boost converter on an EV charger. The CC-CV charging scheme is mainly utilized to charge lithium-ion batteries on an electric vehicle. In CC mode, the battery is charged with a preset value until the battery voltage reaches the desired equalized voltage. During CV mode, equalized current is used to maintain battery voltage to equalize the battery. In this work, equalization current requires the actual battery voltage, desired battery voltage, and the battery current for its calculation. Additionally, a state observer is implemented to estimate voltage across uncertainties of resistance and the battery current. Also, it can enhance the performance of the proposed control scheme and minimize the required sensors. Furthermore, the 1 kW prototype of the bidirectional buck-boost converter is developed to demonstrate the feasibility of the proposed controlled scheme.
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    Control Strategy of Interleaved Buck Converter for Automated Guided Vehicles with Misalignment in Wireless Power Transfer Systems
    (2024-01-01)
    Phongsawat, Suwaphit
    ;
    Pairindra, Worapong
    ;
    Khomfoi, Surin
    ;
    Phophongviwat, Teeraphon
    ;
    Takorabet, Noureddine
    The analysis of the positioning of the power transmission coil with a power rating of 3 kW and an output voltage of 48 V at a frequency of 85 kHz is presented, along with a simulation of the wireless power transfer (WPT) control system using an LCC-S resonance compensation circuit, applied to automated guided vehicles (AGVs). The case where the coil positions are misaligned with a deviation of 0-20% from the size of the power transmission coil is considered. Apparently, it can be illustrated that when the two power transmission coils are misaligned, the battery can still be charged in constant current mode using an interleaved buck converter circuit through a PI controller to increase the output power. The operation is simulated using MATLAB/Simulink software.
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    Hamiltonian Control Law with State Observer on Practical Design of Wireless Power Transfer for Autonomous Guided Vehicle Battery Charging Applications
    (2026-01-01)
    Pairindra, Worapong
    ;
    Somboonpanya, Nattapon
    ;
    Ketjaem, Supakorn
    ;
    Phongsawat, Suwaphit
    ;
    Phophongviwat, Teeraphon
    This paper presents the design and calculation of wireless power transfer (WPT) integrated with the Hamiltonian Control Law. The proposed controller demonstrates greater effectiveness in terms of system stability and precise energy control, as compared to the commonly used PI controller in industrial applications. The proposed prototype has been built for assessment in both simulation and implementation, with a rated output power of 500 W and 48 V. The load-independent compensating topology, such as the LCC-S resonant tank, is used to transmit power wirelessly through an air core. Finally, in the last stage, the Hamiltonian Control Law with state observer is applied on the dc-to-dc buck mode converter to control the battery current and overall system. Apparently, the charging current can be precisely regulated to a specific value.
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    State of Health Battery Estimation by Using the OCPP of Charging Station Combined with Loss of EV Charging System
    (2023-01-01)
    Peanjad, Pannawat
    ;
    Khomfoi, Surin
    ;
    Phophongviwat, Teeraphon
    ;
    Manee-Inn, Chaitouch
    ;
    Thounthong, Phatiphat
    The research paper focuses on estimating the health of electric vehicle batteries using electrical variables measured by the charger during the charging process. These variables are sent to a central processing system via OCPP (Open Charge Point Protocol), as the charger itself has limitations in directly measuring battery health. To overcome this limitation, this research utilizes electrical variables measured by the DC charger during the charging process to estimate battery health. The Coulomb counting method is employed in combination with an investigation into losses within the vehicle's charging system to enhance the accuracy of State of Health (SoH) estimation. The obtained battery health values will assist electric vehicle users in better trip planning and maintenance scheduling.