1 / 7

LECTURE 7

LECTURE 7. Previous lesson The principle of dc generator. Lesson Decleared The e.m.f equation of dc generator.

yardley-kramer
Download Presentation

LECTURE 7

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. LECTURE 7

  2. Previous lesson The principle of dc generator

  3. Lesson Decleared The e.m.f equation of dc generator

  4. E.M.F EquationLetΦ = flux/pole in weberZ = total number of armture conductors= No.of slots x No.of conductors/slotP = No.of generator polesA = No.of parallel paths in armatureN = armature rotation in revolutions per minute (r.p.m)E = e.m.f induced in any parallel path in armatureGenerated e.m.f Eg = e.m.f generated in any one of the parallel paths i.e E.Average e.m.f geneated /conductor = dΦ/dt volt (n=1)

  5. Now, flux cut/conductor in one revolution dΦ = ΦP WbNo.of revolutions/second = N/60Time for one revolution, dt = 60/N secondHence, according to Faraday's Laws of Electroagnetic Induction,E.M.F generated/conductor isFor a simplex wave-wound generatorNo.of parallel paths = 2For a simplex wave-wound generatorNo.of parallel paths = 2No.of conductors (in series) in one path = Z/2

  6. E.M.F. generated/path isFor a simplex lap-wound generatorNo.of parallel paths = PNo.of conductors (in series) in one path = Z/PE.M.F.generated/pathIn general generated e.m.fwhere A = 2 - for simplex wave-winding

  7. Note:The student should read and learn this equation carefully.

More Related