Patent ID: 11873109
Assignee: ROLLS-ROYCE PLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H | IPC B  H

Claim 15:
16. An aircraft power and propulsion system comprising:
a DC power bus having first and second DC power bus terminals;
a DC:AC converter connected to the DC power bus;
an electric machine and a fan, the electric machine connected to the DC:AC converter to receive power from the DC power bus to drive the fan;
an electrical storage unit having first and second terminals, the second terminal connected to the second DC power bus terminal;
a DC:DC converter having first and second DC:AC converters and a transformer connected between the first and second DC:AC converters, the first DC:AC converter connected between and to the first terminal of the electrical storage unit and the first DC power bus terminal; and
a controller connected to control a switching operation of one or both of the first and second DC:AC converters.