US 12,034,382 B2
Three-phase single-stage isolated bidirectional converter and controlling method
Yutan Zhang, Jiangsu (CN); Guoce Li, Jiangsu (CN); Wendi Song, Jiangsu (CN); Yangyang Qian, Jiangsu (CN); and Hsien-Yi Tsai, Jiangsu (CN)
Assigned to Guochuang Innovation Center of Mobile Energy (Jiangsu) Co., Ltd., Jiangsu (CN)
Filed by Guochuang Innovation Center of Mobile Energy Jiangsu Co., Ltd., Jiangsu (CN)
Filed on Jun. 14, 2023, as Appl. No. 18/335,115.
Application 18/335,115 is a continuation in part of application No. 17/728,926, filed on Apr. 25, 2022, granted, now 11,728,749.
Claims priority of application No. 202110702252.9 (CN), filed on Jun. 24, 2021; and application No. 202210953808.6 (CN), filed on Aug. 10, 2022.
Prior Publication US 2023/0327578 A1, Oct. 12, 2023
Int. Cl. H02M 7/797 (2006.01); H02M 1/14 (2006.01)
CPC H02M 7/797 (2013.01) [H02M 1/14 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A three-phase single-stage isolated bidirectional converter, comprising a three-phase alternating current (AC) voltage port, a direct current (DC) voltage port, first to sixth full-bridge circuit units, first to third half-bridge circuit units, first to third phase-shift inductor units, first to third transformers, and first to third filter capacitors, wherein
the three-phase AC voltage port comprises first to sixth ports,
the DC voltage port comprises a seventh port and an eighth port,
the first transformer comprises a first winding and a second winding, the first winding is provided with a first center tap, the first center tap is connected to the first port, two ends of the first winding are respectively connected to midpoints of two bridge arms of the first full-bridge circuit unit through the first phase-shift inductor unit, two ends of the second winding are respectively connected to midpoints of two bridge arms of the second full-bridge circuit unit, wherein the second transformer comprises a third winding and a fourth winding, the third winding is provided with a second center tap, the second center tap is connected to the third port, two ends of the third winding are respectively connected to midpoints of two bridge arms of the third full-bridge circuit unit through the second phase-shift inductor unit, two ends of the fourth winding are respectively connected to midpoints of two bridge arms of the fourth full-bridge circuit unit, wherein the third transformer comprises a fifth winding and a sixth winding, the fifth winding is provided with a third center tap, the third center tap is connected to the fifth port, two ends of the fifth winding are respectively connected to midpoints of two bridge arms of the fifth full-bridge circuit unit through the third phase-shift inductor unit, and two ends of the sixth winding are respectively connected to midpoints of two bridge arms of the sixth full-bridge circuit unit,
two ends of the first full-bridge circuit unit are respectively connected to two ends of the first half-bridge circuit unit, two ends of the third full-bridge circuit unit are respectively connected to two ends of the second half-bridge circuit unit, and two ends of the fifth full-bridge circuit unit are respectively connected to two ends of the third half-bridge circuit unit,
the two ends of the first half-bridge circuit unit are further connected to two ends of the first filter capacitor, a midpoint of a bridge arm of the first half-bridge circuit unit is connected to the second port, the two ends of the second half-bridge circuit unit are further connected to two ends of the second filter capacitor, a midpoint of a bridge arm of the second half-bridge circuit unit is connected to the fourth port, the two ends of the third half-bridge circuit unit are further connected to two ends of the third filter capacitor, and a midpoint of a bridge arm of the third half-bridge circuit unit is connected to the sixth port,
two ends of the second full-bridge circuit unit are respectively connected to the seventh port and the eighth port, two ends of the fourth full-bridge circuit unit are respectively connected to the seventh port and the eighth port, and two ends of the sixth full-bridge circuit unit are respectively connected to the seventh port and the eighth port.