Design and Implementation of a CLLC Resonant Converter for On-Board Charger Applications in Electric Vehicles
13th International Conference on Electrical and Electronics Engineering, ICEEE 2026, Antalya, Türkiye, 27 - 29 Nisan 2026, ss.173-177, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Doi Numarası: 10.1109/iceee69936.2026.11598115
- Basıldığı Şehir: Antalya
- Basıldığı Ülke: Türkiye
- Sayfa Sayıları: ss.173-177
- Anahtar Kelimeler: CLLC Resonant Converter, Electric Vehicle (EV), First Harmonic Approximation (FHA), On Board Charger (OBC), Pulse Frequency Modulation (PFM)
- Gazi Üniversitesi Adresli: Evet
Özet
This paper presents the analysis, design, and closedloop control of a CLLC resonant converter for the isolated DC-DC stage of an electric vehicle (EV) on-board charger (OBC). The CLLC topology is well-suited for OBC applications due to its high efficiency, soft-switching capability, and wide voltage regulation range required for battery charging. The operating principles of the converter are explained, and a steady-state analysis based on the First Harmonic Approximation (FHA) method is carried out to derive the voltage gain characteristics and evaluate the effect of resonant tank parameters. A closed-loop control strategy based on Pulse Frequency Modulation (PFM) is implemented to regulate the output current under varying load conditions. The proposed design and control approach are validated through experimental results.