Generator Mount And Blade Why Is There No CSD Between The Electric Generator Mounted The APU And The Aircraft Electrical Buses?
Why is there no CSD between the electric generator mounted the APU and the aircraft electrical buses? - generator mount and blade
A plane was fitted to the electric generators. These generators produce alternating current. Against this current is introduced into the aircraft electrical bus pass must go through a constant speed (CSD) to the current stabilization. (APU = Auxiliary Power Unit)
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Engines, by necessity, must go through a wide range of rotor speed to act, and RPM, in the absence of a CDD, or we call it now) IDG (integrated drive generator, the frequency over the place. In this case, the AC motors accelerate and brake with the frequency of the AC, electronics go crazy, CDD, etc. reserves the right frequency of 400 Hz, the components makes the system happy.
An APU On the other hand, can be designed to operate at a constant speed, the generator can be up to 400 Hz, or whatever designed constant at that rate. The only trick is to stash the control of the APU will continue to run at a constant speed.
The APU itself is recalled that the CSD at a constant speed of 20000rpm should have a frequency of 400 + / - 15Hertz. So, if the APU can not change or adjust the speed FCU (Fuel Control Unit)
Unlike engines that have now GEN + CSD IDG or CSD is now. Now it's your turn to research.
APU is running at a steady speed, eliminating the need for a CDS.
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