engineering recuitment DVC Junior Engineer Mock Test 2024 Electrical Machines DC Motor DC Motor Speed Control
Which of the following is the disadvantage of 'flux control method' (one of the speed control methods) of a DC shunt motor?
1
It provides slightly complex control.
2
As the field current is small the size of the rheostat required is small.
3
The speed control below normal rated speed is not possible.
4
Power loss in the external resistance is very high.