Electrical Engineering · Synchronous Machines
In engine-driven alternators, the turning moment of the engine is uneven, causing the alternator speed to vary slightly from instant to instant. This is known as cyclic speed irregularity. How is it mathematically measured?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Cyclic irregularity = (Maximum speed - Minimum speed) / Mean speed✓
- 2Cyclic irregularity = (Mean speed - Minimum speed) / Maximum speed
- 3Cyclic irregularity = (Maximum speed - Mean speed) / Minimum speed
- 4Cyclic irregularity = (Minimum speed - Mean speed) / Maximum speed
Correct answer
Cyclic irregularity = (Maximum speed - Minimum speed) / Mean speed
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