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

Claim 4:
5. The circuit of claim 4, wherein before the power conversion circuit is powered off, in the first relays in the plurality of first start circuits, a resistance of the first resistor correspondingly connected in parallel to the first relay opened at a moment T5 is less than or equal to the resistance of the first resistor correspondingly connected in parallel to the first relay opened at a moment T6, and the moment T5 is earlier than the moment T6; and in the second relays in the plurality of second start circuits, a resistance of the second resistor correspondingly connected in parallel to the second relay opened at a moment T7 is less than or equal to the resistance of the second resistor correspondingly connected in parallel to the second relay opened at a moment T8, and the moment T7 is earlier than the moment T8.