11.6 - Electrical Power Flashcards
Where is the power produced in a DC generator?
In the armature (rotor)
A circuit generator, the regulator is a ___________ between the _________ and ground
A circuit generator, the regulator is a variable resistor between the generator field and ground
Paralleling P-Terminals do what?
Paralleling P-terminals compare voltage to ensure they share the load
Small business jets use?
starter-generators
Modern aircraft use ______ alternators
brushless
A brushless alternator consists of 3 separate fields
- PMG - Permanent Field
- Exciter field
- Output field
What does a current transformer do?
A CT (current transformer) senses output current
An IDG consists of what
IDG = CSD + Alternator
Where can you reset a CSD generator?
Only on the ground
Explain a VSCF
VSCF = Variable Speed Constant Frequency
>Reliability
>Lightweight
>Solid state
>DC alternator -> output DC
>Next gen
What is the reason for a current protection device (fuse)?
To protect the wiring
Aircraft that are equipped with fuses are required to carry atleast ______ of any one type of fuse spare
10%
What is the advantage of mercury cells?
Mercury cells have a large capacity and a long life for their small size
What is the voltage of a lithium cell and what is it used for on aircraft?
Lithium cell = 2.8 - 3.6 V
They are used in ELT
(Emergency Locator Transmitter)
How is the state of charge of a Ni-cd determined?
capacity test (by the level of the electrolyte present) Potassium hydroxide and water
