Methods for estimating output current or output voltage of isolated resonant converter

• Main Authors: Liang, Tsorng-Juu, Lin, Chi-Hung, Tseng, Wei-Jing
• Format: Patent
• Language: English
• Published: 11.01.2022
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

A method for estimating an output voltage of an isolated resonant converter is disclosed. The proposed method, wherein the isolated resonant converter includes a transformer having an auxiliary winding and a secondary winding, a first output diode electrically connected to the secondary winding in series and a voltage holder coupled to the auxiliary winding, includes: obtaining the output voltageVo=[vaux_dh⁡(t)+VF]·NsNaux-VF,where vaux_dh(t) is an output voltage of the voltage holder, VF is a forward voltage drop of the first output diode, NS is a number of turns of the secondary winding and Naux is a number of turns of the auxiliary winding.