| Title |
A Study on the Improvement of Stability Through Improved PLL Control Techniques Based on PFC and LLC Topology With Integrated Transformer |
| Authors |
신용진(Yong-Jin Shin) ; 이우철(Woo-Cheol Lee) |
| DOI |
https://doi.org/10.5370/KIEE.2024.73.7.1190 |
| Keywords |
Phase locked loop; Goertzel algorithm; LLC resonant converter; Bridgeless boost PFC converter; Integrated transformer; Sensorless |
| Abstract |
This paper presents an enhanced Phase-Locked Loop (PLL) method using the Goertzel algorithm to improve the performance of Power Factor Correction (PFC) and LLC resonant converters. By eliminating the current sensor at the DC-link capacitor and allowing the LLC converter to operate within the PFC converter's frequency range, the new method ensures efficient Zero Current Switching (ZCS). Experimental and simulation results demonstrate that our approach significantly improves the power factor compared to conventional methods. This solution simplifies the circuit design, reduces overall costs, and increases system reliability. |