J Flashcards
where are generator rating and performance data located?
stamped on the name plate attached to the generator
what does an ammeter indicate when it is connected in the battery positive lead and the engine is operating
If the generator is supplying enough current to charge the battery or the battery discharging
What does an ammeter indicate when it is connected in the generator output lead in the engine is operating
Currently leaving the generator or electrical system load
what is used to control DC generator voltage?
Field current strength
What DC alternator system component prevents battery reverse current flow into the armature
The rectifier
Why are multiple generator systems parallel?
Ensure that each generator shares the load
How many phases are used in most aircraft AC alternator systems
Three
What determines the frequency of an alternator output?
The number of poles and speed of rotation of the rotor
How does a voltage regulator control the voltage of an alternator?
Regulating the voltage output of the DC exciter
Name at least two methods that are used to maintain 400 Hz alternator output, frequency on large turbo jet, or turbo fan engines
Constant speed drives and various speed constant frequencies
What are the major parts of a DC motor?
Amateur field brush and frame
What are the three types of DC motors
Series, shunt, and compound
what are the components of a direct cranking electric starter system?
Electric motor reduction gear and automatic, engaging, and disengaging mechanisms
were the operating modes of a turban engine starter generator
First, as a starter, then as a generator after engine is operating
What is the size standard for electrical wire using US manufactured aircraft
The American wire gauge
