- Power Electronics - Section 1
- Power Electronics - Section 2
- Power Electronics - Section 3
- Power Electronics - Section 4
- Power Electronics - Section 5
- Power Electronics - Section 6
- Power Electronics - Section 7
- Power Electronics - Section 8
- Power Electronics - Section 9


Power Electronics - Engineering
Q1: A dc separately excited motor has a constant field current. The armature is fed from a single phase supply through a semi-converter. When a = 0, speed is 600 rpm. If a = 90°, the speed is likely to beA about 300 rpm
B about 150 rpm
C about 75 rpm
D about zero
ANS:A - about 300 rpm Average output voltage is reduced to 50% if a = 90°. Hence speed is also reduced to 50%. |


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