US 12,438,464 B2
Power converter and power conversion method
Hung-Chieh Lin, Taoyuan (TW); Yi-Ping Hsieh, Taoyuan (TW); Hsin-Chih Chen, Taoyuan (TW); Hung-Yu Huang, Taoyuan (TW); and Jin-Zhong Huang, Taoyuan (TW)
Assigned to Delta Electronics, Inc., Taoyuan (TW)
Filed by Delta Electronics, Inc., Taoyuan (TW)
Filed on Nov. 22, 2023, as Appl. No. 18/518,268.
Claims priority of application No. 202311274168.7 (CN), filed on Sep. 28, 2023.
Prior Publication US 2025/0112548 A1, Apr. 3, 2025
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/158 (2013.01) [H02M 1/0074 (2021.05); H02M 3/1588 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A power converter, comprising:
a first upper-bridge voltage conversion module comprising a first bus capacitor, a first switch, a second switch, a first inductor and a first load capacitor, wherein the first switch, the second switch and the first inductor are electrically connected between the first bus capacitor and the first load capacitor;
a first lower-bridge voltage conversion module comprising a second bus capacitor, a third switch, a fourth switch, a second inductor and a second load capacitor, wherein the third switch, the fourth switch and the second inductor are electrically connected between the second bus capacitor and the second load capacitor;
a second upper-bridge voltage conversion module comprising a fifth switch and a first relay, wherein a first terminal of the fifth switch is connected to a first terminal of the first bus capacitor, the first relay is configured to selectively switch to connect the first inductor to a second terminal of the fifth switch or a first terminal of the first load capacitor, and a second terminal of the first load capacitor is connected to a second terminal of the first bus capacitor; and
a second lower-bridge voltage conversion module comprising a sixth switch and a second relay, wherein a first terminal of the second load capacitor is connected to a first terminal of the second bus capacitor, the second relay is configured to selectively switch to connect the second inductor to a first terminal of the sixth switch or a second terminal of the second load capacitor, and a second terminal of the sixth switch is connected to a second terminal of the second bus capacitor,
wherein the first switch, the second switch, the third switch, the fourth switch, the fifth switch, the sixth switch, the first relay and the second relay are configured to switch switching states such that the first inductor and the second inductor store or release energy, thereby transmitting electrical energy between the first bus capacitor, the second bus capacitor, the first load capacitor and the second load capacitor.