electric test 1 3 alternators Flashcards
Alternators produce AC power and generators produce DC power
T
THe stator is enclosed within a housing made of cast iron, rolled steel, or cast aluminum
T
IN a common design of revolving-field alternator, AC is supplied to the rotor windings through the brushes and slip rings
F
Each rotation in a single phase AC alternator produces one phase of electricity
T
Alternators with a high speed rotors use a larger diamter rotor core than what slow-speed rotors use because of centrifugal forces being increased
F
Single phase alternators are normally used by utilities, large industrial facilities or medical facilities
F
In order to manually synchronize an alternator, there must be a way to ensure that the alternator phase, frequency, and current match the busbars before the alternator is switched into the circuit
F
Two common lights out methods are the three-lights out method and the one light out method
T
The rotor in an AC alternator may also be called a ________ even though the term rotor is more correct
armature
In a common alternator design ____________ is applied to the rotor to move the rotor windings and their magnetic fields past the stator windings.
torque
A_________ alternator is an alternator where a magnetic field is created in the rotor which turns within the fixed stator windings, and AC power is supplied through the stator windings
exciter, revolving field, revolving rotor (IT WAS ALL THE ABOVE)
A _______ alternator consists of a stationary magnet and a single winding that is rotated through the field
single phase AC
A _________ is the power source used to create the relative motion between the coilds and the magnetic field
prime mover
Alternators are rated in ________ at a standard power factor of 80%
kilowatts
A _______ energizes a relay and closes contact when the incoming source and the busbar match
automatic synchronizer
