When in gear, your ratio is locked ... be integrated into a slightly wider ebike motor unit as a one-piece variable speed drive unit, or stuck into a wind turbine generator, or a car, truck ...

The device that controls the fan speed is called a variable speed drive. Variable frequency drives are also used on pumps and cooling towers to match the demand of the space with the proper energy ...

or change the input speed, and efficiency is lost. An infinitely variable transmission, like [Alexander Kernbaum]’s cleverly named Inception Drive, allows the motor to stay at peak efficiency ...

A variable-speed drive (VSD) is used to drive a motor at variable speed. The main parts of a VSD are The control system of the VSD adjusts the output voltage and frequency so that the ratio of voltage ...