• Kavya E
• Dr. Rudranna Nandihalli

This paper presents the control strategy applied to the half-bridge LLC Resonant Converter, applicable for the DC-DC applications. A closed-loop control is achieved by varying frequency through VCO and is analyzed with the help of PI Controller. Due to the Soft Switching (ZVS) technique the turn-on losses in both the switches(MOSFETs) of the circuit are reduced. ZVS method is used for the control of the closed-loop. Validity of the control circuit for the closed-loop is established with the help of PSIM simulation software and results for wide range of input and load. The converter’s power rating is 300W. This circuit is simulated and analyzed for various tank circuits in detail and found that circuit works with very high efficiency when tank W network is used. The efficiency of the converter is 95%. Index Terms- LLC Resonant Converter, ZVS, VCO, closed-loop control.

"Analysis Of Soft Switching Characteristics Of LLC Resonant Converter for DC-DC Application", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.79-83, May-2019, Available :http://www.jetir.org/papers/JETIRCJ06019.pdf

"Analysis Of Soft Switching Characteristics Of LLC Resonant Converter for DC-DC Application", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp79-83, May-2019, Available at : http://www.jetir.org/papers/JETIRCJ06019.pdf