IDG frequency value.

IDG frequency value.

• A. 400 Hz
• B. 60 Hz
• C. 50 Hz
• D. 120 Hz

Answer: (A)

Aircraft electrical systems run on 400 Hz AC to keep transformers, motors, and other components lightweight and compact, which is essential for aircraft performance. The Integrated Drive Generator is designed to produce a stable 400 Hz output even as the engine speed changes, typically using a constant-speed drive or regulation to maintain that frequency. That stability is why the IDG frequency value is 400 Hz. Frequencies like 50 Hz or 60 Hz come from land-based power grids, and 120 Hz isn’t standard for aircraft power systems, so they wouldn’t match the design and weight goals of onboard electrical architecture. Hence, 400 Hz is the correct value.

Aircraft electrical systems run on 400 Hz AC to keep transformers, motors, and other components lightweight and compact, which is essential for aircraft performance. The Integrated Drive Generator is designed to produce a stable 400 Hz output even as the engine speed changes, typically using a constant-speed drive or regulation to maintain that frequency. That stability is why the IDG frequency value is 400 Hz. Frequencies like 50 Hz or 60 Hz come from land-based power grids, and 120 Hz isn’t standard for aircraft power systems, so they wouldn’t match the design and weight goals of onboard electrical architecture. Hence, 400 Hz is the correct value.