Contents
What factors control the output current of a generator?
The amount of output voltage produced by the generator is proportional to three factors:
- the number of turns of wire in the armature.
- the strength of the magnetic field of the pole pieces.
- the speed of the cutting action (speed of rotation)
What three factors determine the output voltage of a DC generator?
Terminal Voltage DC generator output voltage is dependent on three factors (recall equation 5-1): (1) the number of conductor loops in series in the armature, (2) armature speed, and (3) magnetic field strength.
What is responsible for the output of a generator to be DC?
A direct-current (DC) generator is a rotating machine that supplies an electrical output with unidirectional voltage and current. The field is produced by direct current in field coils or by permanent magnets on the stator. The output, or armature, windings are placed in slots in the cylindrical iron rotor.
How is the voltage of a DC generator controlled?
The voltage sent to loads could be controlled by sending the voltage first to a voltage regulator or converter. The voltage of a separately-excited DC generator can be controlled by controlling generator speed, by using a variable field supply, or by a combination of both.
What kind of voltage regulator is used for generator exciter?
All methods use an Automatic Voltage Regulator (AVR) to supply DC output to the exciter stator. The exciter rotor AC output is rectified to a DC input for the main generator rotor. More advanced systems use an additional input to the AVR.
How does a generator control circuit work on a plane?
A typical generator control circuit for low-output generators modifies current flow to the generator field to control generator output power. As flight variables and electrical loads change, the GCU must monitor the electrical system and make the appropriate adjustments to ensure proper system voltage and current.
How is a DC alternator different from a DC generator?
Both devices produce electrical energy to power the aircraft’s electrical loads and charge the aircraft’s battery. Even though they share the same purpose, the DC alternator and DC generator are very different.