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When the load of the DC motor is increased its armature current?
From the equation. (3) we can say, speed is inversely proportional to armature current. Thus, when the speed of the dc motor is increased, the armature current will decrease.
Why does increasing load increase current?
If the mechanical load increases, the rotor stops a bit (since it’s harder for the rotor to rotate a heavier load), which decreases the counter-EMF. This reduction in the counter-EMF thus increases the current in the coil, and so the power needed from the external voltage source.
How do you increase armature current?
Armature current could be increased up to the rated, by which the speed could be increased up to rated, by varying applied voltage. Some general informations about shunt motor.
Is armature current same as load current?
In series field motor the load current is equal to the armature current. In series field generator, the generator does not give output terminal voltage if there is no load connected to it. In shunt field generator, if load is not connected then armature current is equal to field current..
Does current depend upon load?
The amount of current in a circuit depends on the amount of voltage and the amount of resistance in the circuit to oppose current flow. Just like voltage, resistance is a quantity relative between two points.
How does current affect motor speed?
The current through the motor times the resistance of the motor creates a small voltage that must be subtracted from the applied voltage. As the load and current increase, this IR drop also increases causing the motor to lose a little speed.
What is self loading in DC motor?
4. Which DC motor has got maximum self-loading property? Explanation: A differentially compound DC motor, flux reduces so sharply at small increase in load at higher values of load. It is advisable that motor should not be used beyond some load value, as it may damage itself by self-loading.