Hall–Héroult process and vacuum pump: what they have in common

1. Step 1. Hall–Héroult process — uses — Electrical grid. It needs enormous amounts of electricity.
2. Step 2. Electrical grid — uses — Three-phase system. A three-phase system.
3. Step 3. Three-phase system — is used in — Induction motor. Three phases create a rotating field.
4. Step 4. Induction motor — has part — Stator. The windings create a rotating field.
5. Step 5. Stator — is part of — Vacuum pump. A cylindrical chamber.

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