Question

A series-connected DC motor has an armature resistance of 0.5 ? and field winding resistance of 1.5 ?. In driving a certain load at 1200 RPM, the current drawn by the motor is 20A from a voltage source of VT = 220V. The rotational loss is 150W. Find the output power, the motor efficiency, and the load (output) motor torque.

          A series-connected DC motor has an armature resistance of 0.5 ? and field
winding resistance of 1.5 ?. In driving a certain load at 1200 RPM, the current
drawn by the motor is 20A from a voltage source of VT = 220V. The rotational
loss is 150W. Find the output power, the motor efficiency, and the load (output)
motor torque.

A series-connected DC motor has an armature resistance of 0.5 ? and field
winding resistance of 1.5 ?. In driving a certain load at 1200 RPM, the current
drawn by the motor is 20A from a voltage source of VT = 220V. The rotational
loss is 150W. Find the output power, the motor efficiency, and the load (output)
motor torque.

Added by Stephanie R.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Adi S

08/08/2023

Step 1

Since the motor is series-connected, the total resistance (R_total) is the sum of the armature resistance (R_armature) and the field winding resistance (R_field). \[ R_{\text{total}} = R_{\text{armature}} + R_{\text{field}} = 0.5 \, \Omega + 1.5 \, \Omega = 2.0 Show more…

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A series-connected DC motor has an armature resistance of 0.5 ̩ and field winding resistance of 1.5 ̩. In driving a certain load at 1200 RPM, the current drawn by the motor is 20A from a voltage source of VT = 220V. The rotational loss is 150W. Find the output power, the motor efficiency, and the load (output) motor torque.