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

Claim 17:
18. The method according to claim 17, wherein after the controlling, by the sampling control circuit, the second lower bridge arm to be turned on, the method further comprises:
when detecting that the voltage of the first connection end of the alternating current power supply changes from being greater than the voltage of the second connection end of the alternating current power supply to being less than or equal to the voltage of the second connection end of the alternating current power supply, and the charging time of the second power supply drive circuit is less than the second target duration, controlling, by the sampling control circuit, the second lower bridge arm to be turned off; and when detecting that the voltage of the first connection end of the alternating current power supply changes from being less than or equal to the voltage of the second connection end of the alternating current power supply to being greater than the voltage of the second connection end of the alternating current power supply, controlling the second lower bridge arm to be turned on, so that the charging time of the second power supply drive circuit reaches the second target duration.