The Integrated Drive Generator (IDG) combines a constant speed drive and an AC generator in a single housing to provide stable 115/200V, 400Hz, 3-phase electrical power for aircraft systems.
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Overview
The IDG 761574B is installed on the engine accessory gearbox and converts variable engine speed into a constant output speed of 24,000 rpm, enabling the generator to deliver 90 kVA at 400 Hz. Each aircraft uses two IDGs for its AC electrical power channels. The unit integrates a hydraulic pump and motor, charge/scavenge pump, inversion pump, rotating deaerator, mechanical governor, and differential. This design ensures reliable power generation under varying engine conditions.
Features & Benefits
Combines constant speed drive and generator in one compact housing
Provides 115/200V AC, 3-phase, 400Hz power at 90 kVA
Maintains constant generator speed (24,000 rpm) from variable engine input
Includes hydraulic pump/motor assembly and mechanical governor for precise control
Designed for high reliability in demanding aerospace environments
Specifications
Output Power: 90 kVA
Output Voltage: 115/200V AC, 3-phase
Frequency: 400 Hz
Constant Speed: 24,000 rpm
Installation: Engine accessory gearbox
Components: CSD, AC generator, hydraulic pump/motor, differential
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