Variable Frequency Drives Explained - VFD Basics IGBT inverter

A Continuously Variable (CV) transmission uses two pulleys and a drive belt. In this video of a scooter transmission, the engine is driving the pulley on the left. It starts out at rest, as the engine is idling and not spinning fast enough to engage the drive. As engine speed goes up, first the pulley starts to spin (due to a centrifugal clutch engaging) and the inner side of the pulley is all the way inboard, so the effective pulley diameter is small. The driven pulley (only partially visible o