A 1200-V, 4-pole, de motor with 24 current paths, 200 coils and 50 turns per coil is rotating at 1000 rpm. Assume the total flux per pole is 0.02 Wb. and rotor circuit resistance is 1.8 Ohm. a) Find the voltage induced at its terminals. b) Find the current of the motor when it is connected to its rated voltage. Assume the brush voltage drop is 28 V. c) Find the induced torque in the motor. d) Find the input electrical power supplied by the source. e) Find the electrical power delivered to the motor. f) If the core losses and mechanical losses are 3.2 kW, find the power delivered to the load. g) Find the motor efficiency (ignore the field losses). The de machine of Problem 1 is now rotating at 1200 rpm. a) Is it operating as a motor or generator? Find the induced voltage. b) Find the armature current assuming the same brush voltage drop. c) Find the induced torque. d) Find the machine efficiency assuming the same mechanical losses as Problem 1.
A 1200-V, 4-pole, de motor with 24 current paths, 200 coils and 50 turns per coil is rotating at 1000 rpm. Assume the total flux per pole is 0.02 Wb. and rotor circuit resistance is 1.8 Ohm. a) Find the voltage induced at its terminals. b) Find the current of the motor when it is connected to its rated voltage. Assume the brush voltage drop is 28 V. c) Find the induced torque in the motor. d) Find the input electrical power supplied by the source. e) Find the electrical power delivered to the motor. f) If the core losses and mechanical losses are 3.2 kW, find the power delivered to the load. g) Find the motor efficiency (ignore the field losses). The de machine of Problem 1 is now rotating at 1200 rpm. a) Is it operating as a motor or generator? Find the induced voltage. b) Find the armature current assuming the same brush voltage drop. c) Find the induced torque. d) Find the machine efficiency assuming the same mechanical losses as Problem 1.
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter32: Three-phase Motors
Section: Chapter Questions
Problem 13RQ: A squirrel-cage induction motor is operating at 1175 RPM and producing a torque of 22 Ib-ft. What is...
Related questions
Question
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 5 images
Recommended textbooks for you
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning