Hybrid electric propulsion system for aircraft and starting method of turbo machine

• Main Authors: HON ROBERT CHARLES, GANSLER MICHAEL THOMAS
• Format: Patent
• Language: Chinese; English
• Published: 18.12.2018
• Subjects: AIRCRAFT; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSIONTRANSMISSIONS IN AIRCRAFT; AVIATION; COSMONAUTICS; EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; PARACHUTES; PERFORMING OPERATIONS; TRANSPORTING

The invention provides a hybrid electric propulsion system for an aircraft and a starting method of a turbo machine. The hybrid electric propulsion system for an aircraft includes a propulsor and a turbo machine. The turbo machine includes a high pressure turbine drivingly coupled to a high pressure compressor through a high pressure spool. The hybrid electric propulsion system further includes anelectrical system including a first electric machine, a second electric machine, and an electric energy storage unit electrically connectable to the first and second electric machines. The first electric machine is coupled to the high pressure spool of the turbo machine and the second electric machine is coupled to the propulsor for driving the propulsor to provide a propulsive benefit for the aircraft. The hybrid electric propulsion system also includes a controller configured to provide electrical power from an electric power source to the first electric machine to drive the first electricmachine to start, or assis