Getting up to speed
The ever rapid and constant development of electronics has had many positive effects for the sheddie, and one such example is the Variable Frequency Drive (VFD), which allows the speed of 3-phase motors to be electronically controlled with the bonus of adjustable speeds. Historically, continuously variable speed motor drives involved mechanical systems such as the Reeves drive, which is similar to a motor scooter CVT transmission where belt-drive pulleys can be varied in size “on the fly” and hence vary the drive ratio.
These and other transmissions were universally expensive, difficult to retrofit and inefficient. The increased use and falling prices have brought new and used VFD drives within the reach of the home user and have opened opportunities with industrial machinery that previously did not exist.
