Three-phase factor controller

Posted on Feb 23, 2013

The modified power-factor controller, developed at the Marshall Space Flight Center, employs a phase detector for each of the three phase windings of a delta-connected induction motor. The phase-difference sum is the basis for control.

Three-phase factor controller
Click here to download the full size of the above Circuit.

Instabilities of earlier systems are overcome with improved feedback control incorporating a 20Hz bandwidth signal.

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