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Power Factor on AC and DC Drives.96.85ACOn AC Drives, input displacementpower factor remains nearlyconstant with speed & load.POWERFACTOR.30DCOn DC Drives, power factor variesdirectly with SCR phase-firingangle, peaking near .85 .Since power increases linearlywith speed, the effects of lowpower factor at low speed arenegligible.20%SPEED100%13