AEIS CHAPTER 2 Flashcards
What is a generator
electromagnetic device that converts mechanical energy to electrical energy by electromagnetic induction
how are DC batteries used in aircrafts
used for emergency/standby purposes only
an aircraft dc generator is the i) of power and is also used to maintain the ii)
main source, aircraft battery at its fully charged condition
Aircraft DC generator is used for
normal operation
i) of armature affects the voltage produced by a generator
speed
i) of ii) field affects the voltage produced by a generator
strength, magnetic
number if i) affects the voltage produced by a generator
conductors connected in series with the armature
DC generator is made up of a i) and ii)
stator, rotor(shaft)
the stator in a DC generator is i)
stationary
the rotor(shaft) in a DC generator is i)
moving/turning
the magnetic frame(yoke) in the stator provides i) for the poles
mechanical support
the magnetic frame(yoke) in the stator acts i) for the machine
protecting cover
the magnetic frame(yoke) in the stator provides i) for flux produced
a path
the poles in the stator is made of i)
silicon steel plates (laminations) riveted together
the poles in the stator provides a i) for the magnetic flux
low resistance path
the poles in the stator provides i) for the field coils
support
the field coils in the stator produces i)
magnetic flux
the brushes and bearings in the stator is made of i)
carbon and copper alloy
the brushes and bearings collect i) from the ii) and delivers it to the iii)
current, commutator segments, external load circuit
the armature core in the rotor consists of i)
steel laminations insulated from each other
the armature core in the rotor provides a i) for the magnetic flux
low reluctance path
the armature windings in the rotor generates i) if the machines is a generator
EMF
the armature windings in the rotor allows the i) and develops a ii) if the machine is a motor
flow of current, force
the commutator in the rotor facilitates the i) from the ii)
collection of current, armature conductors
the commutator in the rotor rectifies the i) to ii) in the external load circuit
AC current to DC current
a series DC generator is a i) generator in which the field winding is in ii) with the armature winding
self-excited, series
a shunt DC generator is a i) generator in which the field winding is in ii) with the armature winding
self-excited, parallel
a compound DC generator is a i) generator in which the field winding is a ii)
self-excited, combination of series and shunt wound generators
a seperately-excited DC generator is a i) generator in which the field winding and armature are
seperately-excited, seperated
the two methods of winding the armature conductors are
wave winding and lap winding
wave winding is also known as i)
2 circuit winding/series winding