Power plants – Combustion products used as motive fluid
Patent
1990-12-26
1992-12-22
Bertsch, Richard A.
Power plants
Combustion products used as motive fluid
60 39142, 290 38R, F02C 726, F02G 300
Patent
active
051725436
ABSTRACT:
A starting system (10) for a gas turbine (24) in accordance with the invention includes an electric motor (14); and a clutch (20) having an input (18) for receiving torque from the electric motor when the electric motor is activated during starting of the turbine and an output (22) for rotating the gas turbine during starting of the turbine, the clutch having a torque transfer characteristic between the input and the output with no torque being transferred when a rotational speed of the input is below a set speed which is a fraction of a speed at which the gas turbine is self-sustaining in producing output torque and transferring torque above the set speed between the input and output with the set speed being chosen with respect to a power output characteristic of the electric motor as a function of speed of the motor which produces acceleration of the motor to self-sustaining speed while minimizing energy required for starting.
REFERENCES:
patent: 3772526 (1973-11-01), Alwers
patent: 4350236 (1982-09-01), Stahlhuth
patent: 4926631 (1990-05-01), Sorenson
Treager, "Aircraft Gas Turbine Engine Technology", 1970, pp. 268-269.
Bertsch Richard A.
Richman Howard R.
Sundstrand Corporation
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