Method for aircraft engine start using synchronous generator and constant speed drive
AssigneeHamilton Sundstrand Corporation
InventorsMatthew L. Wilhide, Glenn C. Lemmers, Jr.
Life of this patent
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Abstract
A method of starting an aircraft engine is provided. The method includes providing motive power from a generator for starting an engine during an engine start mode and deriving electrical power by way of the generator from rotation of the engine during a generate mode, transmitting the motive power from the generator to the engine during the engine start mode by way of a constant speed drive (CSD) and regulating a frequency of the electrical power output from the generator during the generate mode by way of the CSD and coupling a generator and CSD controller (GCC) to the generator and the CSD and operating the generator and the CSD by the GCC to execute at least the engine start mode and the generate mode.
Claims18
A method of starting an aircraft engine, the method comprising:
- providing motive power from a generator for starting an engine during an engine start mode and deriving electrical power by way of the generator from rotation of the engine during a generate mode;
- transmitting the motive power from the generator to the engine during the engine start mode by way of a constant speed drive (CSD) and regulating a frequency of the electrical power output from the generator during the generate mode by way of the CSD;
- and
- coupling a generator and CSD controller (GCC) to the generator and the CSD and operating the generator and the CSD by the GCC to execute at least the engine start mode and the generate mode.
A starter-drive generator (SDG) system for starting an aircraft engine, the system comprising:
- a generator;
- and
- a constant speed drive (CSD) configured to perform a main engine start through the use of an external power supply and to perform a frequency control function.
A starter-drive generator (SDG) system for starting an aircraft engine, the system comprising:
- a generator to provide motive power for starting an engine during an engine start mode and to derive electrical power from rotation of the engine during a generate mode;
- a constant speed drive (CSD) to transmit the motive power from the engine to the generator during the generate mode;
- and
- a generator and CSD controller (GCC) coupled to the generator and the CSD, which is configured to regulate transmission of the motive power between the generator and the engine to execute at least the engine start mode and the generate mode.
Dependencies are inferred from the claim text.