It is  widely accepted that electric  motors waste  a large part of the current energy drawn. Start-up loads are much higher than operating loads, motors with higher than required ratings, are installed for most application, thus presenting an opportunity to save expensive  electrical energy, when motors operate at part loads.

Frank Nola of NASA first design and patented a micro controller in 1982 to successfully save  energy, which has  been constantly improved over the years with the availability of  advanced computronics.

HOW IT WORKS :

The MAGNATRON detects the lag between the voltage  and current waveforms , and using this lag as a reference point , its proprietary algorithm sends  a firing impulse to the SCR to reduce/increase voltage  and current to match the electricity supply exactly to demand torque load, this  close loop cyclical exercise is repeated 50 times /second.