US 12,088,196 B2
Power expanding apparatus for three-phase LLC circuit
Xiaoliang Guo, Guangdong (CN); Jianguo Bai, Guangdong (CN); Zhenghai Wan, Guangdong (CN); and Likuan Deng, Guangdong (CN)
Assigned to SHENZHEN UUGREENPOWER CO., LTD., Shenzhen (CN)
Filed by SHENZHEN UUGREENPOWER CO., LTD., Guangdong (CN)
Filed on Apr. 16, 2024, as Appl. No. 18/636,430.
Application 18/636,430 is a continuation of application No. PCT/CN2023/136218, filed on Dec. 4, 2023.
Claims priority of application No. 202211557940.1 (CN), filed on Dec. 6, 2022.
Prior Publication US 2024/0258912 A1, Aug. 1, 2024
Int. Cl. H02M 3/00 (2006.01); H02M 1/00 (2006.01); H02M 3/335 (2006.01)
CPC H02M 3/01 (2021.05) [H02M 1/007 (2021.05); H02M 3/33573 (2021.05)] 5 Claims
OG exemplary drawing
 
1. A power expanding apparatus for three-phase LLC circuit, comprising a first full-bridge switching network, a second full-bridge switching network, a first resonant network, a second resonant network, a first transformer network, a second transformer network, a first rectifying network, and a second rectifying network;
a primary side of the first transformer network is connected with an input voltage sequentially through the first resonant network and the first full-bridge switching network, a secondary side of the first transformer network is connected with a load through the first rectifying network; a primary side of the second transformer network is connected with the input voltage sequentially through the second resonant network and the second full-bridge switching network, a secondary side of the second transformer network is connected with the load through the second rectifying network;
the first transformer network comprises a first transformer unit, a second transformer unit, and a third transformer unit; the second transformer network comprises a fourth transformer unit, a fifth transformer unit, and a sixth transformer unit;
secondary sides of any two transformer units in the first transformer network are in star-type connection with a secondary side of any one transformer unit in the second transformer network;
the first full-bridge switching network comprises a first full-bridge switching unit, a second full-bridge switching unit, and a third full-bridge switching unit; the first resonant network comprises a first resonant unit, a second resonant unit, and a third resonant unit; the first rectifying network comprises a first rectifying unit, a second rectifying unit, and a third rectifying unit; the second full-bridge switching network comprises a fourth full-bridge switching unit, a fifth full-bridge switching unit, and a sixth full-bridge switching unit; the second resonant network comprises a fourth resonant unit, a fifth resonant unit, and a sixth resonant unit; the second rectifying network comprises a fourth rectifying unit, a fifth rectifying unit, and a sixth rectifying unit; the first transformer unit comprises a first transformer and a second transformer, the second transformer unit comprises a third transformer and a fourth transformer, the third transformer unit comprises a fifth transformer and a sixth transformer, the fourth transformer unit comprises a seventh transformer and an eighth transformer, the fifth transformer unit comprises a ninth transformer and a tenth transformer, the sixth transformer unit comprises an eleventh transformer and a twelfth transformer;
a first terminal of a primary side of the first transformer is connected with a first terminal of the first full-bridge switching unit through the first resonant unit, a second terminal of the primary side of the first transformer is connected with a first terminal of a primary side of the second transformer, a second terminal of the primary side of the second transformer is connected with a second terminal of the first full-bridge switching unit, a first terminal of a primary side of the third transformer is connected with a first terminal of the second full-bridge switching unit through the second resonant unit, a second terminal of the primary side of the third transformer is connected with a first terminal of a primary side of the fourth transformer, a second terminal of the primary side of the fourth transformer is connected with a second terminal of the second full-bridge switching unit, a first terminal of a primary side of the fifth transformer is connected with a first terminal of the third full-bridge switching unit through a third resonant unit, a second terminal of the primary side of the fifth transformer is connected with a first terminal of a primary side of the sixth transformer, a second terminal of the primary side of the sixth transformer is connected with a second terminal of the third full-bridge switching unit, a first terminal of a primary side of the seventh transformer is connected with a first terminal of the fourth full-bridge switching unit through the fourth resonant unit, a second terminal of the primary side of the seventh transformer is connected with a first terminal of a primary side of the eighth transformer, a second terminal of the primary side of the eighth transformer is connected with a second terminal of the fourth full-bridge switching unit, a first terminal of a primary side of the ninth transformer is connected with a first terminal of the fifth full-bridge switching unit through the fifth resonant unit, a second terminal of the primary side of the ninth transformer is connected with a first terminal of a primary side of the tenth transformer, a second terminal of the primary side of the tenth transformer is connected with a second terminal of the fifth full-bridge switching unit, a first terminal of a primary side of the eleventh transformer is connected with a first terminal of the sixth full-bridge switching unit through the sixth resonant unit, a second terminal of the primary side of the eleventh transformer is connected with a first terminal of a primary side of the twelfth transformer, a second terminal of the primary side of the twelfth transformer is connected with a second terminal of the sixth full-bridge switching unit;
a first terminal of a secondary side of the first transformer is connected with a first terminal of the first rectifying unit, a first terminal of a secondary side of the second transformer is connected with a second terminal of the first rectifying unit, a first terminal of a secondary side of the third transformer is connected with a first terminal of the second rectifying unit, a first terminal of a secondary side of the fourth transformer is connected with a second terminal of the second rectifying unit, a first terminal of a secondary side of the fifth transformer is connected with a first terminal of the fourth rectifying unit, a first terminal of a secondary side of the sixth transformer is connected with a second terminal of the fourth rectifying unit, a first terminal of a secondary side of the seventh transformer is connected with a first terminal of the third rectifying unit, a first terminal of a secondary side of the eighth transformer is connected with a second terminal of the third rectifying unit, a first terminal of a secondary side of the ninth transformer is connected with a first terminal of the fifth rectifying unit, a first terminal of a secondary side of the tenth transformer is connected with a second terminal of the fifth rectifying unit, a first terminal of a secondary side of the eleventh transformer is connected with a first terminal of the sixth rectifying unit, and a first terminal of a secondary side of the twelfth transformer is connected with a second terminal of the sixth rectifying unit;
a second terminal of the secondary side of the first transformer is connected with a second terminal of the secondary side of the third transformer and a second terminal of the secondary side of the seventh transformer; a second terminal of the secondary side of the second transformer is connected with a second terminal of the secondary side of the fourth transformer and a second terminal of the secondary side of the eighth transformer; a second terminal of the secondary side of the fifth transformer is connected with a second terminal of the secondary side of the ninth transformer and a second terminal of the secondary side of the eleventh transformer; a second terminal of the secondary side of the sixth transformer is connected with a second terminal of the secondary side of the tenth transformer and a second terminal of the secondary side of the twelfth transformer.