File:Design of a direct current generator and switchboard for a farm power plant (1912) (14804732483).jpg

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Identifier: designofdirectcu00jewe (find matches)
Title: Design of a direct current generator and switchboard for a farm power plant
Year: 1912 (1910s)
Authors: Jewett, Roy Earnest
Subjects: Electric generators Farms Theses
Publisher:
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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Text Appearing Before Image:
Electrical Reactions (cont.) Commutator (cont.)amperes per sq.in. of brush contact 40 ,4IR drop (lost volts) dueto brush contact 2 Field coils. type no. of coils in seriesmean length of oneturn total resistance (at 50 C.)amp. full load (shunt excit)rheostat resistanceIR drop in rheostat Compound Winding. no. of turns in series per coil. 7,5mean length of one turn 22total resistance (at 50 C.)0.00692amperes, full load 90.9 taped4 22 26 3.37.524.5 circular mils per ampere 1050IR drop (lost volts) in series coil 0.63 Reactions.Armature. ampere conductors per pole 2680ampere cond. beneath pole 2050ampere cond. between poles 630ampere cond. per in. of periphery 342stiffness ratio 1.42reaction conductors per pole 630reaction ampere turns per pole 315
Text Appearing After Image:
Rt No Load. Part Mat-erial. flux perPole. tneaalines) Section/Urea. Flux Density HeartMagnetic Length H I. perUnit Letyth ffiam curta) TotQ/ Z7.77Needed Rrmature ShrctStccl 0581S 8.13 70,730 2.52 10.2 26 Teeth SheetStccI IJ65 1 7 68300 0.84 8.9 8 Rir Gap ^ Rir. U65 23.5 si.?so 0.1875 291 0 Pole Core. Cott Steel 1.398 is. 9 88,000 5 22.86 1/4 YoKe. hastlron 0.699 Z9 24,100 9.45 17. 5 166 Total RT. Needed at No Load = 32&4- 0o Rrmature. SheetStcel 0625 8.23 76.000 2.52 J 2.7 32 Teeth Sh^tStcd 1*25 If 73.500 0.84 115 1 o Rir Gap Rir. 1.2. 5 23. S 53.200 01875 3125 Pole Core CastStsel. I.S 15.9 94.400 d~ 38.1 190 YoKe. Castlron. 0.7 S 2.9 25,850 9.45 19.1 180 Total RT. Needed at Full Load-Rc/d to Compensate for Armature Reaction. Deduct Shunt R. T. at No LoadSeries RT = Difference. 3537 3852 3224 628

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https://www.flickr.com/photos/internetarchivebookimages/14804732483/

Author Jewett, Roy Earnest
Permission
(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:designofdirectcu00jewe
  • bookyear:1912
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Jewett__Roy_Earnest
  • booksubject:Electric_generators
  • booksubject:Farms
  • booksubject:Theses
  • bookcontributor:University_of_Illinois_Urbana_Champaign
  • booksponsor:University_of_Illinois_Urbana_Champaign
  • bookleafnumber:57
  • bookcollection:university_of_illinois_urbana-champaign
  • bookcollection:americana
Flickr posted date
InfoField
30 July 2014


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