Patent ID: 11909308
Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. The method of claim 9, wherein a resistance of the first resistor correspondingly connected in parallel to the first relay closed at a moment T1 is greater than or equal to the resistance of the first resistor correspondingly connected in parallel to the first relay closed at a moment T2, and the moment T1 is earlier than the moment T2; and a resistance of the second resistor correspondingly connected in parallel to the second relay closed at a moment T3 is greater than or equal to the resistance of the second resistor correspondingly connected in parallel to the second relay closed at a moment T4, and the moment T3 is earlier than the moment T4.