defo
In electrical engineering, the _____ is the winding of an electric machine which carries alternating current
armature
an alternator has 10 poles per phase is turning 2000 rpm, what is the output frequency
166.667
a device that converts mechanical energy into electric energy.
generator
______ are used in machines designed for low voltage and high current.
Lap-wound armatures
the output frequency of an alternator is controlled by the
number of stator poles and rotor rotation speed
the mechanical device which converts mechanical input into alternating current out is an
alternator
an alternator has 8 poles per phase is turning 1600 rpm, what is the output frequency
106.667
DC generators must produce DC current instead of AC current, some device must be used to change the alternating voltage produced in the armature windings into direct voltage before it leaves the generator.
commutator.
______ are used in machines designed for high voltage and low current
Wave-wound armatures
the revolving armature type of alternator is capable of _____ power output and is, therefore, _____ often used than the revolving field type
less, less
the direct current that is an input to alternators rotor is the ____ current
excitation
an alternator has 18 poles per phase is turning 2000 rpm, what is the output frequency
300
an alternator has 45 poles per phase is turning 20000 rpm, what is the output frequency
7500
______ ride against the commutator segments and are used to connect the armature to the external circuit of the DC machine
brushes
the rotating part of an alternator is called the
rotor
in a 3 phase alternator, the direction of magnetic field rotation is also called
Phase rotation
an alternator has 6 poles per phase is turning 2800 rpm, what is the output frequency
140
an alternator has 32 poles per phase is turning 1250 rpm, what is the output frequency
333.333
are located inside the housing of the DC machine
pole pieces
an alternator has 28 poles per phase is turning 8025 rpm, what is the output frequency
1872.5
the non rotating part of an alternator is called the
stator
an alternator has 10 poles per phase is turning 6000 rpm, what is the output frequency
500
an alternator has 35 poles per phase is turning 5000 rpm, what is the output frequency
1458.333
low-resistance windings connected in series with the armature.
Series field windings
an alternator has 15 poles per phase is turning 2800 rpm, what is the output frequency
350