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A separately excited DC motor turns at 1200 r/min when the armature is connected to 115V source. Calculate the armature voltage required so that the motor runs at 1500 r/min. At 100 r/min.

Respuesta :

onyebuchinnaji

Answer:

The armature voltage required to run the motor at 1500 RPM is 143.75 V

The armature voltage required to run the motor at 100 RPM is 9.58 V

Explanation:

Given;

angular speed of the DC motor, ω = 1200 RPM

source voltage, V = 115 V

The armature voltage required to run the motor at 1500 RPM;

[tex]V_a = 115V \ \times \ \frac{1500 \ RPM}{1200 \ RPM} \\\\V_a = 143.75 \ V[/tex]

The armature voltage required to run the motor at 100 RPM;

[tex]V_a = 115V \ \times \ \frac{100 \ RPM}{1200 \ RPM} \\\\V_a = 9.58 \ V[/tex]

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