speed increaser gearbox to increase energy efficiency

speed increaser gearbox is possible to significantly increase gearmotor efficiency by replacing a permanent split capacitor (PSC) ac motor with a permanent magnet dc (PMDC) motor. PSCs may have greater maximum efficiency potential, but their true efficiency can be much lower at the actual application operating load point. Also keep in mind that three-phase driven gearmotors are much more efficient than the single-phase equivalent (for example, 64% vs. 53%) and are more reliable because of their simplified design. However, when three-phase power is unavailable, a High Efficiency Vf  Worm Gearbox is required to convert single-phase input to three-phase output for the gearmotor. Today's VFDs are economical and easily justified when one considers their built-in features, such as soft starts to reduce mechanical shock and increase equipment life.