US 12,328,065 B2
Method for estimating parameters of resonant converter, method for controlling resonant converter and resonant converter
Hong Liu, Shanghai (CN); Baihui Song, Shanghai (CN); Wen Zhang, Shanghai (CN); Wenfei Hu, Shanghai (CN); and Cheng Lu, Shanghai (CN)
Assigned to Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed by Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed on Jan. 18, 2023, as Appl. No. 18/156,359.
Claims priority of application No. 202210134339.5 (CN), filed on Feb. 14, 2022.
Prior Publication US 2023/0261568 A1, Aug. 17, 2023
Int. Cl. H02M 3/335 (2006.01); G01R 31/40 (2020.01); H02M 1/00 (2006.01); H02M 3/00 (2006.01)
CPC H02M 3/01 (2021.05) [G01R 31/40 (2013.01); H02M 1/0009 (2021.05); H02M 3/33573 (2021.05); H02M 3/33576 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A method for estimating parameters of a resonant converter, wherein the resonant converter comprises a first port, a second port, and a resonant tank that includes an equivalent resonant capacitor and an equivalent resonant inductor, the method comprising:
estimating a second voltage estimation value of the second port, an equivalent resonant capacitor estimation value, and/or an equivalent resonant inductor estimation value of the resonant converter according to a first voltage of the first port, an equivalent resonant capacitor voltage and an equivalent resonant inductor current of at least three effective points, wherein the at least three effective points have different coordinates on a state plane of the equivalent resonant capacitor voltage and the equivalent resonant inductor current, and are on a state trajectory formed by the equivalent resonant capacitor voltage and the equivalent resonant inductor current, and the at least three effective points are not central symmetric about a center of the state trajectory.