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

Claim 10:
11. A transformer, comprising a controller and a power conversion circuit, wherein the controller is configured to control a relay in the power conversion circuit to be opened or closed; wherein the power conversion circuit comprises:
at least one first power conversion unit connected in series to a first phase line, at least one second power conversion unit connected in series to a second phase line;
a plurality of first start circuits connected in series to the first 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, and first relays in all the first start circuits are sequentially closed after the power conversion circuit is powered on, to start the power conversion circuit; and
a plurality of second start circuits connected in series to the second phase line, wherein_each of the plurality of second start circuits comprises a second relay and a second resistor, the second relay and the second resistor are connected in parallel, and second relays in all the second start circuits are sequentially closed after the power conversion circuit is powered on, to start the power conversion circuit.