engineering recuitment HPCL Engineer Mock Test 2024 Electrical Machines Alternator and Synchronous Motors
In the case of engine-driven alternators, the turning moment of the engine is uneven and, therefore, the speed of the alternator varies slightly from instant to instant. This is called cyclic speed irregularity. How is it measured?
1
Cyclic irregularity = (Maximum speed - Minimum speed) / Mean speed
2
Cyclic irregularity = (Mean speed - Minimum speed) / Maximum speed
3
Cyclic irregularity = (Maximum speed - Mean speed) / Minimum speed
4
Cyclic irregularity = (Minimum speed - Mean speed) / Maximum speed