ch16 - 16-1 Chapter 16 Powering Electric Drives Power...

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2001 by N. Mohan Exit 16-1 Chapter 16 Powering Electric Drives: Power Quality Issues TOC ! " Print
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2001 by N. Mohan Exit 16-2 Powering Electric Drives: Power Quality Issues ! Electric Drives can affect utility power quality ! Utility power quality can affect electric drive operation Power Processing Unit fixed form Electric Source (utility) Controller Electric Drive adjustable form Sensors input command (speed / position) Motor speed / position Load TOC ! "
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2001 by N. Mohan Exit 16-3 Linear and Nonlinear Loads Linear Load s s P PF = = cos V I φ s I s V φ i s v s + TOC ! "
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2001 by N. Mohan Exit 16-4 Linear and Nonlinear Loads (cont°) Non-linear Load (PPU) Total Harmonic Distortion: distortion s1 I %THD = 100 x I Displacement Power Factor: 1 DPF = cos φ s1 2 s I DPF PF = (DPF) = I 1+THD ! Nonlinear loads reduce power factor t ( ) distortion s s1 i i i = t 0 / 1 φ ω s1 i i s v s 1 T 0 TOC ! "
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