US 12,451,731 B2
Resonance-type power converter circuit provided with resonance circuit including LC resonance circuit and switching element
Taichi Mishima, Kyoto (JP); Shingo Nagaoka, Kyoto (JP); Takeshi Uematsu, Kyoto (JP); and Hiroo Sekiya, Chiba (JP)
Assigned to OMRON CORPORATION, Kyoto (JP); and NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY, Chiba (JP)
Appl. No. 18/289,778
Filed by OMRON Corporation, Kyoto (JP); and NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY, Chiba (JP)
PCT Filed Mar. 30, 2022, PCT No. PCT/JP2022/015939
§ 371(c)(1), (2) Date Jun. 24, 2024,
PCT Pub. No. WO2022/249751, PCT Pub. Date Dec. 1, 2022.
Claims priority of application No. 2021-088509 (JP), filed on May 26, 2021.
Prior Publication US 2024/0339866 A1, Oct. 10, 2024
Int. Cl. H02J 50/12 (2016.01); H02J 50/80 (2016.01); H02M 3/00 (2006.01)
CPC H02J 50/12 (2016.02) [H02J 50/80 (2016.02); H02M 3/015 (2021.05)] 9 Claims
OG exemplary drawing
 
1. A resonance-type power converter circuit comprising:
a resonance circuit including a first LC resonance circuit and a switching element, the resonance circuit outputting an output voltage or an output current to a load;
a detector circuit configured to detect output information which is information on the output voltage or the output current;
a calculation controller configured to search for a maximum point or a desired voltage in a characteristic of the output information at an operating frequency using a predetermined maximum point search method based on the detected output information, and determine an operating frequency corresponding to the searched maximum point or desired voltage; and
a signal generator configured to generate a drive control signal having the determined operating frequency, and control the operating frequency on the switching element based on the drive control signal,
wherein the resonance circuit has a characteristic of output information at the operating frequency having a load independent point that does not depend on the load and corresponds to the maximum point or the desired voltage, and
wherein the resonance circuit is configured to feed back a drive control signal including the output information to the switching element and drive the switching element at the load independent point by controlling the operating frequency using the drive control signal.