DC Gen1
When a DC Generator's pole shoes lose their residual magnetism, the generator will not be able to produce any voltage or current upon startup. One method that may be used to restore this small amount of residual magnetism is known as
What is Flashing the field
In some DC generators, an interpole is placed between the main poles of the generator in order to reduce magnet field distortion.
TRUE OR FALSE?
What is True
Interpole is placed between the main poles of the generator in order to strengthen the magnetic field created in the armature.
TRUE OR FALSE?
In a DC generator, the brushes ride on the surface of the ___________, forming the electrical contact between the armature coils and the external circuit.
What is the commutator.
In a DC generator, the _____completes the magnetic circuit between the poles and acts as a mechanical support for the other parts of the generator.
What is Field Frame.
A Voltage regulator adjust DC generator voltage output by altering the amount of current flowing from the regulator to the generator______ in response to varying electrical loads.
What is Field Windings
Generator rating and performance date are:
A ________ generator combines a series winding and a shunt winding in such a way that the good characteristics of each are used on the aircraft.
What is compound wound
In a DC generator, the _________ is located at the end of an armature and consists of wedge-shaped segments of hard drawn copper, insulated from each other by thin sheets of mica.
What is commutator
An ______ is used in some aircraft systems to convert a portion of the aircraft's DC power to AC.
What is Inverter.
Many light aircraft employ a three-unit regulator for their DC generator systems. This type of regulator includes a ________ and a reverse current cutout in addition to a voltage regulator.
What is current limiter
Most Aircraft DC generators have a speed at which they begin to produce their normal voltage. This is termed the _______ speed, it is usually about 1,500 rpm.
What is "Coming in".
A DC generator having a field winding connected in parallel with the external circuit is called a _____.
What is a shunt generator.
The ______ of a generator consists of many armature coils wound on an iron core, a commutator, and associated mechanical parts.
What is armature assembly.
A ______ converts aircraft's AC power to DC.
What is rectifier
The armature current of an alternator varies with the ___________.
What is the load.
The three-phase alternator has three single-phase windings spaced so that the voltage induced in each winding is _____ out of phase with the voltages in the other two windings.
What is 120 degrees.
The field winding of a series-wound DC generator is connected in series with the
external circuit called the load. The greater the current through the field coils to the external circuit, the greater the induced emf and the greater the terminal or output voltage.
Therefore, when the load is increased, the voltage _______.
What is increases
The DC Generator field coils are made up of many turns of insulated wire and are usually wound on a form that fits over the iron core of the pole to which it is securely fastened.
TRUE OR FALSE?
What is the schematic symbols for the electric motor?
First to draw it wins!
YES
Many turbine-powered aircraft use a _______ that acts like a starter during the start of the engine and when the engine is online it acts like a generator.
What is a starter generator
The two types of stator connections in an AC alternator are____________.
What is Delta and Y (wye).
In a DC generator, current flowing through the armature sets up electromagnetic fields in the windings. These new fields tend to distort or bend the magnetic flux in between the poles of the generator from a straight-line path. Since armature current increases with load, the distortion becomes greater with an increase in load. This distortion of the magnetic field is called _______.
What is an armature reaction
Most DC Generator field coils are connected so that the poles show alternate polarity. Since there is always one north pole for each south pole, there must always be an even number of poles in any generator.
TRUE OR FALSE???
What is True.
The eddy current losses are reduced by _____ the field poles, frame, and armature.
What is laminating.