What is load current in DC generator?
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What is load current in DC generator?
Hence, here load current is similar to field current (i.e. IL=If). The curve OC and OD represent internal and external characteristic respectively. In a DC series generator, terminal voltage increases with the load current. This is because, as the load current increases, field current also increases.
How do you calculate the load current in a DC generator?
In case if a dc machine, the value of load current at maximum…
- I L = √(constant losses / armature resistance)
- I L = √(variable losses / armature resistance)
- I L = √(variable loss + constant losses / armature resistance)
- I L = √(constant losses / R a + R f)
How is current controlled in a DC generator?
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. A self-excited dc generator can be controlled by generator speed or by a rheostat or electronic circuit that reduces the field current.
What kind of current is flowing through the armature of a DC generator?
The current in an armature is AC (alternating current). In a DC generator, the current is induced from the rotation of the armature within the field magnetic flux. In a DC motor, the alternating current is produced by the rotation of the commutator.
Is the voltage induced in a DC generator alternating current or direct current?
In a DC generator, the output current can only be induced in the rotor. AC generators produce a high voltage which varies in amplitude and time. The output frequency varies (mostly 50Hz to 60Hz)….Also Check:
| Alternating Current (AC) and Direct Current (DC) | Electric Generator |
|---|---|
| The Electric Motor | Electromagnetic Induction |
What current does generator produce?
However, the process they use is different. An AC generator creates an alternating current that periodically reverses direction. But in a DC generator, a direct current flows in one direction. In an AC generator, the coil through which current flows is fixed, and the magnet usually moves.
What is load in dc motor?
The load converts the mechanical power to some other mechanical or other form. Power from the motor (into shaft) plus power to the load (out of the shaft) equals the change in energy stored in the shaft (the kinetic energy, but in steady state there is no change), Equ [1].