Patent ID: 11932405
Assignee: ROLLS-ROYCE PLC
Field: Transport (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 15:
16. A method of operating an aircraft cabin blower system, the aircraft cabin blower system comprising a cabin blower compressor having a contactless bearing arrangement; a transmission having a transmission output arranged to drive the cabin blower compressor, a first transmission input arranged to receive mechanical power from a gas turbine engine, and a second transmission input arranged to receive mechanical power from a variator output, the method comprising:
receiving inputs from the gas turbine engine at the first transmission input and a variator input;
controlling a direction of rotation of the variator output so that the first and second transmission inputs oppose each other;
determining that the inputs at the first transmission input and the variator input satisfy a start-up threshold condition; and
responsive to the determination, reversing the direction of rotation of the variator output.