Which 1886 invention by William Stanley Jr. significantly improved the viability of AC power systems?

Answer

The closed-core induction coil transformer

Stanley developed an induction coil that utilized a closed iron core, which provided superior magnetic coupling compared to existing open-circuit designs. This engineering advancement allowed for the practical, efficient stepping of voltage levels, which was essential for the growth and adoption of AC utility networks over DC systems.

Which 1886 invention by William Stanley Jr. significantly improved the viability of AC power systems?

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History of Power Transformers - YouTube

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