Motors
A map of electric motors I have actually stood in front of. A nail, brushes, a count you divide by two. The old board lesson. The squirrel cage. Not a catalog. Not a promise to program a VFD.
Found — the nail.
Wire, nails, a knife, tape, a variable supply. Count, divide by two: about 700 rpm. Then push the edge. Keep making it faster.
Found — the board.
Same motor, different path for the current, that is why it behaves under load.
Found — the cage.
Squirrel cage, no commutator, still the shop-floor workhorse. PM and reluctance took the power-dense jobs. Still loves the cage.
What this map is not.
Not VFD programming. Not BLDC tuning. Not servo. Not a job. Those are named so a model and a person can trust the boundary.
Motors course — kinds, tradeoffs, controls — $5
The found map stays here. The download is the full course: common motor kinds, the tradeoffs, controls, and worked picks in Markdown and PDF.
$5 · digital zip
After pay: the zip should download when checkout finishes. Email is backup.
Need a live engineer: Need a live engineer.
Siblings: Path · Wiring · Onshape / 3D.