Unit 1-6 Flashcards
What is electromagnetic induction?
When electric energy is transferred by means of a magnetic field (without direct contact)
The process of producing voltage (current) by moving a conductor (wire) through a magnetic field
What do alternators and generators do?*
Change mechanical energy into electrical energy using the process of electromagnetic induction
DC generators charge the _____ (main purpose) and send _____ to _____ _____ on an aircraft
battery
power
electrical loads
Where are DC generators found?
AC generators?
Older, light aircraft
Large aircraft
What is MTOW?
Maximum take-off weight
How is AC current created in a generator?
Wire must rotates inside the magnet (generator)
As the loop rotates it “cuts” the flux lines
Breaking the energy bonds of the magnetic flux – produces the electrical voltage/current
Only get electron flow when the lines of lux are cut (AC)
Not constant current
Describe the armature in a generator*
The main current carrying electrical winding
Contains commutator and coils
The armature rotates (the rotor)
The armature receives (produces) the induced voltage/current
Describe the commutator in a generator*
Connects the armature (rotor) to the generator brushes (stationary)
Connected electrically to the main coil (primary winding)
Typically made of pure copper with an insulation (e.g. mica) between each segment
Describe the brushes in a generator*
Electrical contacts which touch the rotating commutator and provide a current path for the power to leave the rotating armature
What is rectification?*
What is inversion?
Rectification uses the top part of sine curves to create DC curve
Changes AC to DC
Changing DC to AC
How do we rectify AC current to DC current in a generator?*
Commutator and brush combination
Where do all generators produce AC?*
In the armature winding
Describe a multi-phase generator
Contains several winding loops in the rotor
Produces a multi-phase output voltage (more sine waves)
This produces a “smoother” generator output
The generator works according to the principle of _____ _____.
electromagnetic induction
