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

Claim 13:
14. The method according to claim 13, wherein after the controlling, by the sampling control circuit, the first 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 less than the voltage of the second connection end of the alternating current power supply to being greater than or equal to the voltage of the second connection end of the alternating current power supply, and the charging time of the first power supply drive circuit is less than the first target duration, controlling, by the sampling control circuit, the first 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 greater than or equal to the voltage of the second connection end of the alternating current power supply to being less than the voltage of the second connection end of the alternating current power supply, controlling the first lower bridge arm to be turned on, so that the charging time of the first power supply drive circuit reaches the first target duration.