Patent ID: 11923769
Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 4:
5. The control system according to claim 1, wherein the PFC circuit further comprises:
a second power supply drive circuit, the second bridge arm comprises a second upper bridge arm and a second lower bridge arm, the second bridge arm midpoint is a serial connection point between the second upper bridge arm and the second lower bridge arm of the second bridge arm, the other end of the sampling control circuit is connected to the second lower bridge arm, a first connection end of the second power supply drive circuit is connected to the second upper bridge arm, and a second connection end of the second power supply drive circuit is connected to the second bridge arm midpoint;
the sampling control circuit is further configured to:
control, based on the voltages of the two ends of the alternating current power supply, the second lower bridge arm to be turned on, so that the second power supply drive circuit starts charging, and
when charging duration of the second power supply drive circuit reaches second target duration, control the second lower bridge arm to be turned off, so that the second power supply drive circuit completes charging.