1. What is Transformer Power Loss?

Transformer power loss refers to the total energy dissipated as heat in a transformer during operation. It consists of core losses (hysteresis and eddy current losses) and copper losses (I²R losses in windings).

2. How Does the Calculator Work?

The calculator uses the transformer power loss equation:

Where:

• \( P_{loss} \) — Total power loss (W)
• \( I \) — Current flowing through transformer (A)
• \( R_{core} \) — Equivalent core resistance (Ω)
• \( R_{winding} \) — Winding resistance (Ω)

Explanation: The equation calculates total power dissipation by summing core losses and copper losses, both proportional to the square of the current.

3. Importance of Power Loss Calculation

Details: Accurate power loss calculation is crucial for transformer efficiency analysis, thermal management, system design optimization, and energy cost estimation.

4. Using the Calculator

Tips: Enter current in amperes, core resistance and winding resistance in ohms. All values must be valid (current > 0, resistances ≥ 0).

5. Frequently Asked Questions (FAQ)

Q1: What are the main components of transformer losses?
A: Core losses (hysteresis and eddy currents) and copper losses (I²R losses in windings).

Q2: Why is power loss proportional to current squared?
A: According to Joule's law, power dissipation in resistive elements is P = I²R, making losses proportional to the square of current.

Q3: How does temperature affect transformer losses?
A: Higher temperatures increase winding resistance, thereby increasing copper losses. Core losses may decrease slightly with temperature.

Q4: What are typical efficiency ranges for transformers?
A: Large power transformers: 95-99%, distribution transformers: 97-99%, small transformers: 85-95%.

Q5: How can transformer losses be minimized?
A: Using better core materials, optimizing winding design, proper cooling, and operating at optimal load conditions.