A 240-V, 10-hp de shunt motor has an annatiire resistance of 0.40 ohm and a shimt field resistance of 80 olmi. The rotational loss of tlie motor is 500 W. For a given load condition^ the motor takes ail input current of 35 A and runs at 1500 rpin. Draw the equivalent circuit of the motor and determine its armature current and induced voltage (or back emf). Determine the developed power and developed torque. Determine the output power and efficiency. Determine the speed of the motor when an external resistance of 2 ohm is connected in series with the armature. Assume that the input current remains the same as 35 A. Estimate the starting current of the motor.
A 240-V, 10-hp de shunt motor has an annatiire resistance of 0.40 ohm and a shimt field resistance of 80 olmi. The rotational loss of tlie motor is 500 W. For a given load condition^ the motor takes ail input current of 35 A and runs at 1500 rpin.
Draw the equivalent circuit of the motor and determine its armature current and induced voltage (or back emf).
Determine the developed power and developed torque.
Determine the output power and efficiency.
Determine the speed of the motor when an external resistance of 2 ohm is connected in series with the armature. Assume that the input current remains the same as 35 A.
Estimate the starting current of the motor.
Name three basic methods of controlling speed of a de motor.
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