Which of the following is an advantage of rheostatic control method (one of the speed control methods) of DC shunt motor?
A. Due to low power losses the method is inexpensive and highly efficient.
B. As armature current is less than field current, rheostat required is of small size andcapacity.
C. The method needs economical heat dissipation arrangements.
D. Easy and smooth speed control below normal is possible.
Answer:D
Which of the following is an advantage of rheostatic control method (one of the speed control methods) of DC shunt motor?
A. Due to low power losses the method is inexpensive and highly efficient. B. As armature current is less than field current, rheostat required is of small size andcapacity. C. The method needs economical heat dissipation arrangements. D. Easy and smooth speed control below normal is possible.