Question:
A 1-\(\phi\), 230 V, 50 Hz transformer is operated at 230 V, 60 Hz. Then its
A 1-\(\phi\), 230 V, 50 Hz transformer is operated at 230 V, 60 Hz. Then its
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Increasing frequency while keeping voltage constant reduces core flux, affecting both types of losses.
Updated On: May 23, 2025
- Eddy current loss will remain same and Hysteresis loss will increase
- Eddy current loss will remain same and Hysteresis loss will decrease
- Eddy current loss will decrease and Hysteresis loss will remain same
- Eddy current loss will increase and Hysteresis loss will also increase
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The Correct Option is B
Solution and Explanation
Eddy current loss \( \propto f^2 \), and Hysteresis loss \( \propto f \)
But if voltage is constant and frequency increases, the core flux decreases due to reduced volt-seconds per cycle. Hence:
- Eddy current loss (∝ \( B^2 f^2 \)) remains nearly same
- Hysteresis loss (∝ \( B^{1.6} f \)) decreases due to reduced flux \( B \)
But if voltage is constant and frequency increases, the core flux decreases due to reduced volt-seconds per cycle. Hence:
- Eddy current loss (∝ \( B^2 f^2 \)) remains nearly same
- Hysteresis loss (∝ \( B^{1.6} f \)) decreases due to reduced flux \( B \)
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