Power Transformer Design Tool (2026)

In the first hour, it asked her about winding arrangement, suggesting a novel interleaved disc design that reduced eddy losses by 18%. In the third hour, it generated a complete core stacking pattern, optimizing the mitred joints to suppress local hot spots. By midnight, it had output a full mechanical drawing, a bill of materials, and even a thermal simulation showing the hottest spot would be 6°C below the limit.

And that’s how a dead engineer’s logic taught a new generation to build the electric grid of the future—one winding, one core, one honest question at a time.

She used it to design the wind farm transformer in eleven days. Power Transformer Design Tool

The Power Transformer Design Tool didn’t just calculate. It dialogued .

But the tool’s real secret emerged when she double-clicked finch_core.log . In the first hour, it asked her about

Mira opened the log to the final entry: “Oct 22, 2003 — My hands don’t wind coils anymore. My eyes can’t read thermographs. But the Tool? It’s still learning. If you’re reading this, young engineer, remember: the best design tool doesn’t give you answers. It teaches you how to ask better questions. — Alistair Finch, Master Winder.” The tool is now open-sourced, maintained by a global community of power engineers. They call it “Finch’s Loom.” And Mira? She added one new feature: a button labeled “What would Finch ask?”

She ran it on a lark. Instead of a dry form, a single question appeared: “What is the heart of the transformer?” She typed: “The flux.” “Correct. Now, give me your constraints: MVA, voltage ratio, frequency, stray loss limit, and what metal you dream of.” She hesitated. Then she entered the wind farm’s specs—plus an experimental amorphous alloy no commercial tool supported. And that’s how a dead engineer’s logic taught

That night, Mira found the miracle buried in a forgotten server directory. A retired engineer named Alistair Finch, who had worked for a now-defunct transformer manufacturer, had left behind a cryptic executable: .