Question 2 15 pts A 440 V dc shunt motor has a rated armature current of 76 A at a speed of 1000 rev/min. The armature r

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Question 2 15 Pts A 440 V Dc Shunt Motor Has A Rated Armature Current Of 76 A At A Speed Of 1000 Rev Min The Armature R 1 (94.26 KiB) Viewed 86 times

Question 2 15 pts A 440 V dc shunt motor has a rated armature current of 76 A at a speed of 1000 rev/min. The armature resistance of the motor is 0.377 W; the field resistance is 110 W; and the rotational losses is 1 kW. The load of the motor is unidirectional. The motor is braked by Dynamic Braking. Find at the following points: 1. Point C: The operating point when the speed falls to zero. Describe the relationship between the braking time and the braking resistance fi.e. How the value of the braking resistance affect the braking time). 2. Point D: The Steady state operating point where the motor reaches the final speed while driving a unidirectional load torque If the motor drives a constant torque load of rated torque determine the new steady state speed and the current after the dynamic braking is applied