2001 by N. MohanExit16-2Powering Electric Drives: Power Quality Issues!Electric Drives can affect utility power quality!Utility power quality can affect electric drive operationPowerProcessingUnitfixedformElectric Source(utility)ControllerElectric DriveadjustableformSensorsinput command(speed / position)Motorspeed /positionLoadTOC!"
2001 by N. MohanExit16-3Linear and Nonlinear LoadsLinear LoadssPPF = = cosV IφsIsVφisvs+−TOC!"
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2001 by N. MohanExit16-4Linear and Nonlinear Loads (cont°)Non-linear Load (PPU)Total Harmonic Distortion:distortions1I%THD = 100 x IDisplacement Power Factor:1DPF = cos φs12sIDPFPF = (DPF) = I1+THD!Nonlinear loads reduce power factort()distortionss1iii=−t0/1φωs1iisvs1T0TOC!"