Expression for generated emf in a dc generator, Electrical Engineering

Assignment Help:

Q. Derive the expression for generated emf in a dc generator.

Ans.

Expression for Generated emf in a DC Generator

 

             We shall now derive an expression for the emf generated in a d.c. generator.

 

                   Let Φ    = flux/pole in Wb

 

                          Z    = total no. of armature conductors

 

                          P    = no. of poles

 

                          A   = no. of parallel paths = 2......for wave winding

 

                                = P....for lap winding

 

                          N   = speed of armature in r.p.m.

 

                          Eg   = e.m.f. of the generator = e.m.f./parallel path

 

             Flux cut by one conductor in one revolution of the armature, dΦ = pΦ webers

 

                     Time taken to complete one revolution,

 

                           dt = 60/n sec.

 

                    e.m.f. generated/conductor  dΦ/dt =  PΦ/60/N = PΦN/60 volts

 

                    e.m.f. generator, Eg = e.m.f. per parallel path

 

                                  = (e.m.f/conductor) × No. of conductor in series per parallel path

 

                                  =   PΦN/60 × Z/A

 

                          Eg    =   PΦZN/60A

 

                        A       = Z...for wave winding

 

                                  = P....for lap winding


Related Discussions:- Expression for generated emf in a dc generator

Sketch voltage and the energy stored in the capacitor, Q. Considering the c...

Q. Considering the circuit shown in Figure, sketch v(t) and the energy stored in the capacitor as a function of time.

Discuss applications of dielectrics, Discuss applications of dielectrics. ...

Discuss applications of dielectrics. Application of dielectrics: For various applications various properties of dielectric materials are required as: electrical, mechanical

What do you mean by digital systems, Q. What do you mean by digital systems...

Q. What do you mean by digital systems? Electronics information is generally placed into two categories as digital and analog. The Digital information is represented in discret

Elucidate the nature of signals produced, Q. Elucidate the nature of signal...

Q. Elucidate the nature of signals produced on subscriber's loop by a pulse dialer and a touch tone dialer.  Ans: DTMF is a simple two-of -eight encoding scheme where every

Show that the force exerted on each charge, Q. Consider two 1-C charges sep...

Q. Consider two 1-C charges separated by 1 min free space. Show that the force exerted on each is about one million tons.

Full wave rectifier with filter, what is the theory for full wave rectifier...

what is the theory for full wave rectifier with c filter

Define waves and transmission lines, Q. Define waves and transmission lines...

Q. Define waves and transmission lines? In basic circuit theory we neglect the effects of the finite time of transit of changes in current and voltage and the finite distances

Explain about automatic stabilizers, Q. Explain about Automatic Stabilizers...

Q. Explain about Automatic Stabilizers? Automatic Stabilizers: Government fiscal policies which have effect of automatically moderating cyclical ups and downs of capitalism.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd