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: The journey began in 1902 with Peter Cooper Hewitt's invention of the mercury-arc rectifier , the first device capable of converting alternating current (AC) into direct current (DC) at a meaningful scale.

: In 1956, a team at General Electric , led by J. Moll, invented the thyristor (silicon-controlled rectifier). This sparked the "second electronics revolution," replacing large mercury valves with compact silicon wafers that could switch heavy loads. Download Power Electronics (1) pdf

: These early, glowing vacuum devices allowed for the electrification of railways and early industrial processes, though they were limited by their massive size and low reliability. The Semiconductor Revolution (1956–1980s) : The journey began in 1902 with Peter

The "deep story" of modern power electronics truly started with the shift from vacuum tubes to solid-state physics. : By the 1970s and 80s, the development

: By the 1970s and 80s, the development of the Power MOSFET and the IGBT (Insulated-Gate Bipolar Transistor) gave engineers the ability to switch power at high frequencies with incredible precision. This led to the creation of the switch-mode power supplies (SMPS) that today make our laptops and phone chargers compact and light. Power Electronics Today: The Silent Force Introduction to Power Electronics - IQY Technical College