Efficiency
Transformer Loss Calculation Guide
By Ziyao Engineering Team2026-04-2210 min
Transformer Loss Calculation
Transformer losses consist of no-load (core) losses and load (copper) losses. Understanding these is essential for TCO analysis.
Loss Components
- No-Load Loss: Constant, from core magnetization. Depends on core material and flux density.
- Load Loss: Proportional to current squared (I²R). Includes winding loss + stray loss.
- TCO Formula: Purchase Price + (NLL × hours × rate × years) + (LL × LF² × hours × rate × years)
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