AM.II.K.K4
Knowledgeconstant speed drive (CSD) and integrated drive generator (IDG) systems and components.
From the FAA library
- Chapter 9: Aircraft Electrical System › Large Multiengine Aircraft › AC Power Systems
Figure 9-105. Parallel power distribution system. Split-Parallel Systems A split-parallel bus basically employs the best of both split-bus and the parallel-bus systems. The split-parallel system is found on the Boeing 747-400 and contains ... four generators driven by the main engines and two APU-driven generators. The system can operate with all generators in parallel, or the generators can be operated independently as in a split-bus system. During a normal flight, all four…
- Chapter 9: Aircraft Electrical System › Generator Controls › Functions of Generator Control Systems
When field current is controlled, generator output is controlled. Keep in mind, this system is manually adjusted and would not be suitable for aircraft. Aircraft systems must be automatic and are therefore a bit more complex. There are two basic ... types of generator controls: electromechanical and solid-state (transistorized). The electromechanical type controls are found on older aircraft and tend to require regular inspection and maintenance. Solid-state systems are more modern and typically considered to have better reliability…
- Chapter 9: Aircraft Electrical System › Aircraft Batteries › Alternator Drive
Alternator Drive The unit shown in Figure 9-78 contains an alternator assembly combined with an automatic drive mechanism. The automatic drive controls the alternator’s rotational speed which allows the alternator to maintain a constant 400-Hz AC output ... frequency of approximately 400 Hz. If the frequency strays more than 10 percent from this value, the electrical systems do not operate correctly. A unit called a constant-speed drive (CSD) is used to ensure the alternator rotates…