How does the rpm affects the resistance and voltage in a motor
Answers
Answer:
How is rpm affected if I increase voltage and lower resistance in a DC motor?
The shaft speed of a DC motor depends on a few factors and armature voltage and current are two of them.
Assuming the motor has reached a steady-state operating point, if the armature voltage is increased by a small increment, the shaft speed will increase by a corresponding increment dependent on the machine design and type of compounding. Speed is proportional to armature voltage and the relationship is dependent on the type of field compounding; but in general, the speed increases as the armature voltage increases.
If the DC resistance of the armature circuit is reduced either external to the DC machine (wires, drive, source resistance, etc.) or it is decreased through internal design changes (brushes, armature conductor size, the number of armature turns, etc.), the net effect will lead to an increase of the available voltage across the armature for a given source voltage and this will generally result in a net increase in the shaft speed.
Answer:
Back to the original question: how does voltage affect speed? From the analysis above, we can see that when the load (torque) on the motor is constant, speed is directly proportional to supply voltage. And, when the voltage remains constant, an increase in the load (torque) on the motor results in a decrease in speed
Explanation:
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