File:Harmonics in the exciting current of transformers (1912) (14595707407).jpg

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Identifier: harmonicsinexcit00doan (find matches)
Title: Harmonics in the exciting current of transformers
Year: 1912 (1910s)
Authors: Doane, Harry Allen Ingalls, Ross Darwin
Subjects: Current transformers (Instrument transformer) Harmonics (Electric waves) Theses
Publisher:
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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degrees . PIFTH HARMONIC . 50 0 i 0 cos50I icos5©0 sin5©0 isin500 50 - ^ 5 -8 2 cos5©.139 - 4 ) cccos(595 5 .284 50 3.7 .643 2.38 .766 2.835 -32 .848 1.735 100 5.6 -.173 - .97 .984 5.51 18 .951 1.945 150 6.3 -.866 -5.46 .5 3.15 68 .375 .767 200 6.2 -.939 -5.82 -.342 -2.12 118 -.47 -.96 250 5.7 -.342 -1.95 -.939 -5.35 168 -.978 -.2 300 6.5 .5 3.25 -.866 -5.63 218 -.778 -1.59 350 9.4 .984 9.25 -.173 -1.625 268 -.035 - .0717 400 Ii.7 .766 8.96 .64 2 7.53 318 .743 1.52 450 12 0000 0000 1.0 12.0 368 .99 2.04 5C0 10.6 -.766 -8.12 .643 6.82 418 .53 1.083 550 8.4 -.984 -8.26 -.173 -1.45 468 -.309 - .631 600 6.7 -.5 -3.35 -.866 . -5.8 518 -.927 -1.9 650 6.3 .342 2.16 -.939 -5.92 568 -.883 -1.805 700 6.7 .9 39 6.29 -.342 -2.29 618 -.375 - .766 750 6.5 .866 5.63 .5 3.25 668 .616 1.26 800 5.2 .173 .88 .984 5.02 718 .035 .0717 850 3.0 -.643 -T.93 .766 2.3 768 .669 1.3G8 900 000 - 1.0 00002.52 0000 000018.23 818 -.139 - .284 a = .205 p v 2.025 , c = 2.045 , 5 tantf = 7.17 5 , 4 = 5 82 degrees .
Text Appearing After Image:
30 CONCLUSIONS. From the study of the harmonics it is seen that the wattless or magnetizingcomponent of the exciting current is what causes the distortion of the wave, and thehigher the density at which the transformer is worked the greater the distortion .The maximum value of the exciting current depends upon the position of the harmonicsrelative to the fundamental . It was found that the magnitude of the triple harmonicin the delta secondary connection of three transformers v/as dependent upon the kindof connection made in the primaries , that is , whether star or delta . The magnitu-de of the effective value of the triple in the case of the star primary was much gre■ ■ater than in the case of the delta primary because there was no path for the triplein the star primary and it had to flow in the delta secondary while in the deltaprimary connection and delta secondary there are two paths for the triple . It wasalso shown that no matter what the distortion of a wave shape was , wh

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https://www.flickr.com/photos/internetarchivebookimages/14595707407/

Author

Doane, Harry Allen;

Ingalls, Ross Darwin
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(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Flickr tags
InfoField
  • bookid:harmonicsinexcit00doan
  • bookyear:1912
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Doane__Harry_Allen
  • bookauthor:Ingalls__Ross_Darwin
  • booksubject:Current_transformers__Instrument_transformer_
  • booksubject:Harmonics__Electric_waves_
  • booksubject:Theses
  • bookcontributor:University_of_Illinois_Urbana_Champaign
  • booksponsor:University_of_Illinois_Urbana_Champaign
  • bookleafnumber:66
  • bookcollection:university_of_illinois_urbana-champaign
  • bookcollection:americana
Flickr posted date
InfoField
30 July 2014
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