SPEED LIMITING FOR POWER TURBINE GOVERNING AND PROTECTION IN A TURBOSHAFT ENGINE

• Main Authors: MEISNER, Richard P, CROWLEY, Timothy J, CAI, Chaohong, MA, David Lei
• Format: Patent
• Language: English; French; German
• Published: 15.05.2024
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; GAS-TURBINE PLANTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

A turboshaft engine for a helicopter, comprising: a gas generator (102; 202); a power turbine (104) disposed downstream of the gas generator (102; 202); and a controller (132; 232) in communication with the gas generator (102; 202) and the power turbine (104), the controller (132; 232) including a processor (134) configured to receive a collective lever angle command signal and a real-time power turbine speed signal, generate a power turbine speed rate signal based at least in part on the collective lever angle command signal and the real-time power turbine speed signal, generate a power turbine torque request signal based at least in part on the collective lever angle command signal and the real-time power turbine speed signal, generate a fuel flow signal and an inlet guide vane signal (254) based at least in part on the power turbine speed rate signal, and send the fuel flow signal and the inlet guide vane signal (254) to the gas generator (102; 202) in order to control a torque of the power turbine (104).