Lesson 7 Review Flashcards
How do ALT/GEN convert mechanical energy into electrical energy?
Electromagnetic induction
How do you determine the FREQUENCY of an alternator?
# of pole pairs SPEED of rotation
An alternator with 2 PAIRS of field poles will produce how many complete cycles?
2
What are the 2 ways we can regulate output FREQ?
CSD (hydromechanical)
VSCF (SS)
High output BRUSHLESS alternators are also referred to as?
Generators
What is an IDG?
Integrated Drive Generator, combines CSD and ALTERNATOR
What is a CSD?
A hydro-mechanical trasnsmission driven by the EDG
What is the purpose of the CSD?
Takes the VARIABLE engine RPM and changes it to a CONSTANT RPM to drive the ALTERNATOR
An AC freq. of 400Hz is maintained by what?
CSD
How do we maintain a CSD?
Colour of oil
Content of oil
What is a VSCF? What does it produce?
Variable Speed Constant Freq.
What component produces Frequency Regulated, 3 phase AC form?
VSCF
What are the advantages of VSCF?
brushless ALT
less moving parts = reduced maintenance and weight
The primary source of electrical power on an M2 aircraft is what?
High Output Brushless ALT
What is the phase to ground AC produced?
115VAC
What is the phase to phase AC produced?
208VAC
What component monitors and controls generator operation in one central control unit?
Generator Control Unit
What are the 2 parts of a GCU?
Hot (power)
Ground (circuit return)
What component utilizes the principles of electro-magentic induction?
Current Transformer
What is the purpose of a current transformer?
Indirectly measures the amount of CURRENT in a conductor through INDUCTION into a SECONDARY conductor
Signals from the current transformer are sent where?
GCU
What are FEEDER FAULTS?
problems detected by the GCU
What faults impacts the delivery of GEN output to the busses?
Feeder Faults
This process of dropping non-essential busses is known as what?
LOAD SHEDDING
