Pairindra, Worapong
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Preferred name
Pairindra, Worapong
Main Affiliation
Email
worapong.pa@kmitl.ac.th
6 results
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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 implementation of SHE control technique for the SST with CHB seven-level waveform on the solar farm applications(2019-03-01); ; This proposed paper presents the use of selective harmonic elimination (SHE) technology to control the cascaded H-Bridge Multi-level Inverter (CHBMI) for power transferring over the high frequency transformer (HFT), which is a part of the SST for applying to a solar farm. Apparently, the converter is using the seven-level CHBMI and the SHE technique to get rid of the 5<sup>th</sup> harmonic and 7<sup>th</sup> harmonic to find a set of angles θ<inf>1</inf>, θ<inf>2</inf> and 63 with the lowest 3<sup>rd</sup> harmonic. The calculated angles are used in each modules. Obviously, the simulation has shown that, at m<inf>a</inf>=2.43, θ<inf>1</inf>=11.6782°, θ<inf>2</inf>=26.8870° and θ<inf>3</inf>=56.0271°. The total harmonic distortion (% THDv) will be lowest at 9.35%. According to the experimentation, the SHE technique with low % THDv can reduce the power loss at HFT compared to the square wave transmission technique which the % THDv is high. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Deteriorated solar panel detection technique of SST for a solar farm application(2019-03-01); ; This proposed paper introduces the fault detection method for solar cell with Box Plot technique on the Solid State Transformer (SST) for the solar farm application. The Box Plot technique with inclusive quartile value is functioned for finding the upper and lower limit for data analysis. Normally, the fault detections of solar panels are found by using the PV string current from the SST to calculate the upper and lower limit of the Box Plot. If one of the string currents is in the specific outer boundary, therefore, the solar panels are in non-operational condition mode. Generally, the fault detection testing for the solar panels can be categorized in 5 cases: normal condition, open circuit condition, line-line condition, partial shading condition and degradation condition. Finally, based on the simulation result and the actual results, the Box Plot is able to monitor the performance of the PV string according to various conditions as efficiently as possible and accurate. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Hamiltonian Control Law with State Observer on Practical Design of Wireless Power Transfer for Autonomous Guided Vehicle Battery Charging Applications(2026-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The Prediction of Lithium Battery Life in Cellular Telecommunication Stations(2022-01-01); This research paper introduces the remaining useful life prediction of lithium batteries operating at 48 V, 100 Ah on the cellular telecommunication substation with the load supply current conditions 1C rate at 100% DOD. According to the prediction technique, a 100-cycle of experimental results of actual discharge time are used to create the equation by using the curve fitting technique. Finally, the obtained results can estimate the battery lifetime and identify the time which will be able to supply the battery's load if the battery is operated under any conditions.