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Medium Power Transformer Core

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Product Description

Core Manufacturing Excellence – From Coil to Core

By Number of Phases – Stacking & Cutting Patterns for definition of transformer cores

Single‑Phase Cores

Two‑leg or three‑leg stacked cores. Wound cores are popular for distribution due to lower joint losses. GO utilization: higher flux density in legs; mitered overlaps critical to avoid local saturation.

Three‑Phase Cores

Three‑leg stacked (common for distribution) and five‑leg (for large power transformers to reduce height). GO utilization: yoke and limb sections require different cutting angles; advanced nesting software maximizes material yield from master coils.

The process from grain‑oriented silicon steel coil to core involves:

1. Slitting – Precision width cutting with controlled burr height.

2. Punching / Cutting – Step‑lap, mitered, or straight cuts with minimal magnetic degradation.

3. Stacking – Automated or manual, ensuring uniform stacking factor .

4. Annealing (if required) – Stress‑relief annealing restores magnetic properties after cutting; coating must survive this process.

5. Assembly & Clamping – Uniform pressure prevents lamination vibration and maintains low core loss.

Medium power transformer core Medium power transformer lamination Small power transformer core Small power transformer lamination Core of small power transformer Lamination of small power transformer Extra-large transformer core Extra-large transformer lamination Core of extra-large transformer core Lamination of extra-large transformer

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