Pairindra, Worapong
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Preferred name
Pairindra, Worapong
Main Affiliation
Email
worapong.pa@kmitl.ac.th
17 results
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Item type:Publication, Development of a Cascaded Half-bridge Converter with Contactless Transformer in DC Microgrid(2016-01-01); A high efficiency cascaded half-bridge converter for contactless transformer with 1 A, 5 V and 600 kHz for mobile phone charger application is implemented in this paper by using simple PI discrete algorithm controller. The proposed target is to achieve the arch free, controllable voltage and galvanic isolation outlet and plug power transforming converter in a dc low voltage household power distribution. For the optimized outcome, the parameters are calculated and verified by MATLAB/Simulink program for bench testing. Additionally, this paper will be presented in both of the simulation and implementation results. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Active power control technique of a BESS and crate parameter consideration for AC microgrid applications(2019-03-01); ; Manee-In, ChaitouchThis paper presents the active power control of a BESS to reduce the PV power fluctuation problem by using the ramp rate control technique, including the C-rate parameter for the AC microgrid system applications, by simulating and designing the battery management system (BMS). The suitable power of BESS power rating can be estimated from the power ramp rate (PRR) of the PV power generation system. Based on the simulated results, it is found that high electrical discharge caused the temperature inside the battery to rise higher than that of low-voltage discharge, and with the simulation results from Real Battery Management System Program, the software can control the charging and discharging of BESS's active power and display real-time results via the display screen. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The plug and outlet for home appliances in DC low voltage micro-grid system(2017-11-03); This proposed paper introduces the more effectiveness of power transferring in dc micro-grid power distribution in order to comprehend the usage of home appliances. A 300V 5-level diode clamped multilevel is operated as power source for contactless power transfer with a selective harmonic elimination(SHE) technique, and the output is set at 48 V 300W with the efficiency at 92.6%. The converter generates 200 kHz switching frequency to send a highly magnetic coupling through primary coil over ferromagnetic material in tight coupling condition. The paper aims are to eliminate the electric shock, galvanic isolation and arch free in dc to dc power conversion. Additionally, the lower %THD can reduce designed parameters which mean the power density will be increased. The output will be illustrated in both simulation and implementation results. - Some of the metrics are blocked by yourconsent settings
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, The optimization of series resonant LLC half-bridge converter with coreless transformer design in a low voltage DC distribution system(2015-08-17); This paper will present the optimization design for medium size converter with high switching frequency for household appliances. The series resonant LLC half-bridge converter, 1 kW, 48V and 600 kHz with coreless transformer has been chosen for the power transferring. System verification has been done by MATLAB/Simulink program, which used to find the optimized parameters and converter output under designed conditions. - 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, 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.