A 120 V series-wound dc motor has a field resistance of 104 N and an armature resistance of 10 N. When operating at full speed, a back emf of 80 V is generated. (a) What is the total resistance of the motor? 114 (b) What is the starting current? V A (c) What is the operating current? 1.0526 0.3508 (d) The efficiency of the motor is the ratio of the power output to the power input. Determine the efficiency based on the known data. Pin - Pout Pin = 0.33
A 120 V series-wound dc motor has a field resistance of 104 N and an armature resistance of 10 N. When operating at full speed, a back emf of 80 V is generated. (a) What is the total resistance of the motor? 114 (b) What is the starting current? V A (c) What is the operating current? 1.0526 0.3508 (d) The efficiency of the motor is the ratio of the power output to the power input. Determine the efficiency based on the known data. Pin - Pout Pin = 0.33
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Transcribed Image Text:A 120 V series-wound dc motor has a field resistance of 104 and an armature resistance of 10 N. When operating at full speed, a back emf of 80 V is generated.
(a) What is the total resistance of the motor?
114
(b) What is the starting current?
1.0526
(c) What is the operating current?
0.3508
A
(d) The efficiency of the motor is the ratio of the power output to the power input. Determine the efficiency based on the known data.
Pm - Pout
= 0.33
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