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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS)
Hoa, Truong Phuoc
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Control & Systems Engineering Electrical & Electronics Engineering

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LCL filter based high power density AC/DC converter for fast charging applications Tuyen, Nguyen Dinh; Tam, Nguyen Van Minh; Hoa, Truong Phuoc
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 15, No 4: December 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v15.i4.pp2308-2322

Abstract

This paper introduces a LCL filter design tailored for a 40 kW three-phase grid-connected converter utilized in electric vehicle onboard fast chargers. In contrast to conventional filters, the LCL filter finds extensive application in AC/DC converters for power factor correction, thanks to its enhanced harmonic reduction and improved stability of the system. The parameters of LCL filter are devised based on considerations such as the system’s power, the frequency of the alternating current (AC) input, and the PWM frequency, determined through simulation and comprehensive theoretical analysis. By implementing a dual-current closed-loop control strategy, the system ensures a robust response for both the current on the AC side of the converter and the voltage on the direct current (DC) side. The analysis of the system’s performance includes rapid dynamic response, system efficiency, AC current harmonic, and DC ripple voltage. Both simulation and experimental results are presented to validate the proposed design for the LCL filter.
Enhanced speed regulation using separate P and I gain controllers in a fuzzy-PI framework Pham, Minh Duc; Qui, Duong Nguyen Trong; Hoa, Truong Phuoc
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 16, No 4: December 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v16.i4.pp2280-2295

Abstract

This paper explores an enhanced method for regulating the speed of brushless DC (BLDC) motors using field-oriented control. Conventionally, a proportional-integral (PI) controller is employed to adjust output speed and current FOC method. While the PI controller is effective in many scenarios, it exhibits limitations including poor performance when the speed reference changes rapidly. To address these limitations, a fuzzy-PI control scheme is proposed in this study with the aim of improving the speed control performance of BLDC motors, especially under rapidly changing speed reference. The proposed two separate fuzzy logic controllers adaptively adjust the proportional and integral gains so that it combines the robustness of fuzzy logic with the steady-state error of PI control. Simulation and experimental results demonstrate that the fuzzy-PI control significantly outperforms the conventional PI controller in terms of BLDC stability, response time, and accuracy. The proposed approach ensures more reliable and efficient speed regulation for BLDC motors, making it a reliable solution for applications where speed reference fluctuate frequently.
Co-Authors Pham, Minh Duc Qui, Duong Nguyen Trong Tam, Nguyen Van Minh Tuyen, Nguyen Dinh