Pairindra, Worapong

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Pairindra, Worapong
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Email
worapong.pa@kmitl.ac.th

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    Item type:Publication,
    Wireless Power Transfer System for Autonomous Driving Robot Battery Charging
    (2023-01-01)
    Pairindra, Worapong
    ;
    Khomfoi, Surin
    ;
    Takorabet, Noureddine
    ;
    Thounthong, Phatiphat
    This paper presents a prototype of a 48V, 200W with 85 kHz wireless power transfer. The load-independent charging topology consists of an LCC/C resonant tank that provides an autonomous driving robot that is used in many industrial applications. The validation is carried out using MATLAB/Simulink and hardware implementation. The rear side battery can apparently be charged with a 15cm distance between two coils and the output voltage can be controlled at a specific level with approximately 70% efficiency.
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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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    The Development of DC-Nano Grid with Wide-Range Wireless Power Transfer for EVs
    (2022-01-01)
    Pairindra, Worapong
    ;
    Khomfoi, Surin
    ;
    Takorabet, Noureddine
    ;
    Thounthong, Phatiphat
    This research paper presents a wireless power supply for electronic or electrical devices such as LED taillights or headlight bulbs on the electric vehicle (EVs). The main objectives of using wireless power transfer (WPT) are cost savings and the prevention of fires caused by the insulation burning due to overheating in the conventional cable. According to commercial necessity, the primary goal of the research is to simplify the power converter and transmission coils. Therefore, a high-frequency half-bridge inverter connected with a resonant tank compensator is selected for this task. The power transfer rate is set at 24V, 24W via the high-frequency inverter with 4SV DC input voltage. Apparently, the wireless power at the point load can be controlled at the desired value by using both MATLAB/Simulink and hardware implementations with different ranges of evaluation.
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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.