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

Ive some applications of hall effect, Give some applications of Hall Effect...

Give some applications of Hall Effect. Applications of Hall Effect: 1. This is used for finding whether a semi-conductor is N-type or P-type. 2. This is used in finding

Transformer of distribution, Transformer of distribution: Let be the t...

Transformer of distribution: Let be the transformer of distribution of the Face(Figure) 3 connected to the primary between phase a and c of a three-phase network of 23 kV. Bot

Resistance, if the sheet resistance of a tin oxide is 100 ohms, what is the...

if the sheet resistance of a tin oxide is 100 ohms, what is the thickness of the oxide layer?

Sensor selection, Submit a brief report on the selection of two commerciall...

Submit a brief report on the selection of two commercially available sensors for the following: • Research and recommend a sensor for a real full size conveyor system of approxima

Formation of energy bands in solids, Describe in brief the Formation of ene...

Describe in brief the Formation of energy bands in solids and hence explain how it helps to classify the solid in to conductors and insulators. Energy Bands in Solids Acco

Define shifting and reversing – linear system, Define Shifting and Reversin...

Define Shifting and Reversing – Linear System? The signal x[n - m] is said to be time-shifted by m samples, where m is an integer. If m is positive, the shift is to the right (

Identify the processes involved in fabrication, The first three elements of...

The first three elements of the task are: 1. To critically examine a selection of the components used on this design 2. To recommend materials to be used in making the board

Show the overall output limitations of speed control, Q. Show the Overall o...

Q. Show the Overall output limitations of Speed Control? The overall output limitations are as shown in Figure. With base speed defined as the full-field speed of themotor at t

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