1. What is Transformer Efficiency?

Transformer efficiency is a measure of how effectively a transformer converts input power to output power. It is expressed as a percentage and indicates the ratio of output power to input power, accounting for losses in the transformer.

2. How Does the Calculator Work?

The calculator uses the efficiency formula:

Where:

• \( P_{\text{out}} \) — Output power in watts (W)
• \( P_{\text{in}} \) — Input power in watts (W)

Explanation: The formula calculates the percentage of input power that is successfully delivered as output power, with the remaining percentage representing energy losses in the transformer.

3. Importance of Efficiency Calculation

Details: Calculating transformer efficiency is crucial for energy conservation, cost savings, and environmental impact assessment. Higher efficiency transformers reduce energy waste and operating costs.

4. Using the Calculator

Tips: Enter both output power and input power in watts. Ensure output power is less than or equal to input power for valid results.

5. Frequently Asked Questions (FAQ)

Q1: What is considered good transformer efficiency?
A: Modern transformers typically have efficiencies between 95-99%, with higher values indicating better performance.

Q2: What causes efficiency losses in transformers?
A: Losses occur due to core losses (hysteresis and eddy currents) and copper losses (resistance in windings).

Q3: How does load affect transformer efficiency?
A: Efficiency varies with load, typically reaching maximum efficiency at 50-75% of full load capacity.

Q4: Can efficiency exceed 100%?
A: No, efficiency cannot exceed 100% as output power cannot exceed input power due to energy conservation laws.

Q5: How is efficiency different from transformer rating?
A: Rating indicates maximum power handling capacity, while efficiency measures how effectively power is transferred.