An EV powertrain replaces the engine, transmission, differential, and starter motor with three boxes: an inverter, a motor, and a single- speed reduction gear. We walk why a flat torque curve killed the multi-speed transmission, the permanent-magnet versus induction motor split, the silicon-carbide inverter revolution, regen blending with friction brakes, and what oil-cooled motors changed.
Inverters
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EV Drivetrains -
Solar PV: From Photon to Inverter The semiconductor physics of free energy: how the photovoltaic effect works at the PN junction, why Shockley-Queisser caps single-junction silicon near 30%, what's actually inside a panel and how it degrades, MPPT as a hill-climbing algorithm, string inverters versus microinverters honestly compared, the duck curve solar inflicts on the grid, and real payback math for a homelab-scale install.