Khomfoi, Surin
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Preferred name
Khomfoi, Surin
Alternative Name
Khomfoi, S.
Main Affiliation
Email
surin.kh@kmitl.ac.th
7 results
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Item type:Publication, Wireless Power Transfer System for Autonomous Driving Robot Battery Charging(2023-01-01); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The Development of a 1 kW Mid-Range Wireless Power Transfer Platform for Autonomous Guided Vehicle Applications Using an LCC-S Resonant Compensator(2025-06-01); ; This study presents the development, simulation, and hardware implementation of a 48 V, 1 kW mid-range wireless power transfer (WPT) platform for autonomous guided vehicle (AGV) charging in industrial applications. The system uses an LCC-S compensation topology, selected for its ability to maintain a constant output voltage and deliver high efficiency even under load variations at a typical coil distance of 15 cm. It can also operate at different distances by adjusting the compensator circuit. A proportional–integral (PI) controller is implemented for current regulation, offering a practical, low-cost solution well suited to industrial embedded systems. Compared to advanced control strategies, the PI controller provides sufficient accuracy with minimal computational demand, enabling reliable operation in real-world environments. Current adjustment can be dynamically carried out in response to real-time changes and continuously monitored based on the AGV battery’s state of charge (SOC). Simulation and experimental results validate the system’s performance, achieving over 80% efficiency and demonstrating its feasibility for scalable, robust AGV charging in Industry 4.0 Manufacturing Settings. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Control Strategy of Interleaved Buck Converter for Automated Guided Vehicles with Misalignment in Wireless Power Transfer Systems(2024-01-01); ; ; Takorabet, NoureddineThe 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. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The Development of DC-Nano Grid with Wide-Range Wireless Power Transfer for EVs(2022-01-01); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A Bidirectional LCC-S Compensator on Wireless Power Transfer with Constant Voltage(2025-01-01); ; This paper studies a bidirectional wireless power transfer (BD-WPT) system designed for electric vehicles (EVs) operating at 400V input, 350V output, 11kW, and 85kHz. The bidirectional power electronic devices that function as inverters or rectifiers with relays are employed to alter the direction of power flow between the source and the vehicle in the bidirectional DC-DC converter, which utilizes the LCC-S resonant circuit that is designed separately for the source and vehicle. MATLAB/Simulink is used to conduct the validation. The output voltage on both the source and the vehicle sides can be regulated to a specific level. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The implementation of fundamental harmonic approximation technique on electric vehicle wireless charger(2021-05-19); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A Contactless Receptacle Applied to DC Power Distribution(2021-01-01); The modern household power distribution with dc-to-dc power transfer is presented in this paper in order to demonstrate inductive power transfer technology over air-core and ferromagnetic-core. A high-frequency switching with a five-level diode clamped multilevel converter plays an important role in generating a low-%THD voltage waveform in order to increase the power density or reduce the size of the plug and receptacle. The major setbacks of using the dc-to-dc power transfer with electric shock, galvanic isolation issue and arc discharge on the contactor have been solved by using the inductive power transfer. In addition, an LLC series resonant tank is integrated with the power converter to satisfy the Zero-Voltage Switching (ZVS) condition of all active switching devices. The proposed contactless receptacle technique is validated by using MATLAB/Simulink and a developed hardware prototype. The efficiency of the power transfer while using the magnetic material core versus the air-core type is approximately 83.8% and 92.6%, respectively.1