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

Claim 8:
9. A method, comprising:
controlling first relays in a plurality of first start circuits of a power conversion circuit to be sequentially closed after the power conversion circuit is powered on, wherein the power conversion circuit comprises the plurality of first start circuits and at least one first power conversion unit that are connected in series to a first phase line, a plurality of second start circuits and at least one second power conversion unit that are connected in series to a second phase line, wherein each of the plurality of first start circuits comprises a first relay and a first resistor, the first relay and the first resistor are connected in parallel, each of the plurality of second start circuits comprises a second relay and a second resistor, and the second relay and the second resistor are connected in parallel; and
controlling second relays in all the second start circuits to be sequentially closed after the power conversion circuit is powered on.