Transformer Sizing for Three-Phase VFDs: Harmonics Impact and Relevant Standards

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#1 21670229 25 Oct 2013 07:19

Ayu Noman Ayu Noman

Anonymous

Post #1
21670229 25 Oct 2013 07:19

Is it true that when using transformers and three-phase drives/VFDs for induction motors, the transformer's power needs to be oversized in order to avoid increased harmonics (or even other problems)?

If you know any official standard, paper or recommendation regarding the matter of sizing transformers vs drives, please share.

Thank you
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#2 21670230 27 Oct 2013 00:00

DAVID CUTHBERT DAVID CUTHBERT

Anonymous

Post #2
21670230 27 Oct 2013 00:00

Here are links to two papers on this subject.

http://www05.abb.com/global/scot/scot239.nsf/...e27b8525788d0052d3ba/$file/lvd-eotn13u-en.pdf

http://www.danfoss.com/nr/rdonlyres/b3175b64-f8f4-46d4-95d4-2491f3cca03c/0/vfdlesson5.pdf
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