Module 4 Flashcards
The commutator or a generator does what?
changes alternating current produced in the armature into direct current as it is taken from the armature
The poles of a generator are laminated to?
reduce eddy current loss.
The pole pieces or shoes used in a DC generator are part of?
field assembly
In a generator, what eliminates any possible sparking to the brush guides caused by the movement of the brushes within the holder?
the brush pigtail
What is not one of the purposes of interpoles in a generator?
reduce field strength
The method most often used in overcoming the effect of armature reaction is through the use of?
interpoles
Which types of DC generator is not used as an airplane generator?
series wound
How is a shunt-wound DC generator connected?
both fields are shunted across the armature.
The most common method of regulating the voltage output of a compound DC generator is to vary the?
current flowing through the shunt field coils
The only practical method of maintaining a constant voltage output from an aircraft generator under varying conditions of speed and load is to vary the?
strength of the magnetic field
A voltage regulator controls generator voltage by changing the?
resistance across the field circuit
If a generator is equipped with a vibrator type voltage regulator, what determines the actual time the voltage regulator points remain open?
depends on the load on the generator
How are generators rated?
amperes and rated voltage
The generator rating is usually found stamped on the:
Data plate
What is the cause of generator brush arcing?
low spring tension
To what depth is the mica insulation between the commutator bars of a DC generator undercut?
equal to the width of the mica
If any one generator in a 24-Volt DC system shows low voltage, the most likely cause is?
an out of adjustment voltage regulator
Residual voltage is a result of magnetism in the?
field shoes
What is a method used for restoring generator field residual magnetism?
flash the fields
