Which mechanism causes increased eddy current losses when power transformer operates at elevated frequency without capacitance compensation?

💡 Explanation

When a power transformer operates at high frequency without capacitance compensation, the skin effect becomes more pronounced because the alternating magnetic field induces opposing eddy currents that concentrate the current flow near the conductor's surface, boosting resistive losses. Therefore skin effect is the primary cause, rather than hysteresis, leakage flux, or dielectric breakdown, which are frequency independent.

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