A Study on the Improvement of Stability Through Improved PLL Control Techniques Based on PFC and LLC Topology With Integrated Transformer
통합 변압기를 적용한 PFC, LLC 토폴로지 기반 개선된 PLL 제어기법을 통한 안정성 향상에 관한
연구
Yong-Jin Shin Woo-Cheol Lee
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.
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