Patent ID: 11955839
Assignee: ANHUI DYNAMIC POWER CO., LTD
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 4:
5. The dual-input circuit according to claim 1, wherein: the auxiliary power supply unit adopts a flyback dual-input auxiliary power supply, and is respectively connected to the first input voltage and the second input voltage through the first electromagnetic interference filter and the second electromagnetic interference filter; when one or two of the first input voltage and the second input voltage have a normal input voltage, the dual-input auxiliary power supply provides auxiliary power to the dual-input control circuit, the first contactor drive circuit, the second contactor drive circuit, the first detection circuit, the second detection circuit, and the third detection circuit; and when one of the first input voltage and the second input voltage is connected to the key power circuit, a main auxiliary power supply in the key power circuit provides auxiliary power to the dual-input control circuit, the first detection circuit, the second detection circuit, and the third detection circuit, while the first contactor drive circuit and the second contactor drive circuit are still powered by the dual-input auxiliary power supply.