- 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 constant field current. The armature is fed from a single phase supply through a full converter. When a = 0, speed is 500 rpm. If a = 45°, the speed is likely to beA about 350 rpm
B about 250 rpm
C about 175 rpm
D about 125 rpm
ANS:D - about 125 rpm Average output voltage ∝ cos a and therefore reduced to 0.707 of the value for a = 0. Speed is nearly proportional to voltage. |


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