Expression for generated emf in a dc generator, Electrical Engineering

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

Posted Date: 7/23/2012 1:34:18 AM | Location : United States







Related Discussions:- Expression for generated emf in a dc generator, Assignment Help, Ask Question on Expression for generated emf in a dc generator, Get Answer, Expert's Help, Expression for generated emf in a dc generator Discussions

Write discussion on Expression for generated emf in a dc generator
Your posts are moderated
Related Questions
Q. The energy stored in a 2-µF capacitor is given by w c (t) = 9e -2t µJ for t ≥ 0. Find the capacitor voltage and current at t = 1s.

What is DMX? It is a communications protocol between step motors, actuators and an electronic circuit. A kind of language among elements there different manufacturers can use c

Define real time operating system. Real time operating system (RTOS): The real operating system is an operating system used in embedded applications which performs tasks in a

(a) What is understand by clipping circuit. Draw and illustrate different types of diode clipping circuits? (b) With the help of circuit diagram describe the working of centre t

Write a control word for counter 1 of 8253 / 8254 that selects the following options:  load least significant byte only, mode 5 of operation and binary counting.  Then write an ins

disadvantage of series & shunt clipper

simulate a uniform quantizer that takes as an input a vector of numbers and returns as an output the quantized vector. 1-Generate a random input vector of 10000 samples randomly in

Q. What do you mean by Companding? Companding is the process of compressing and expanding. It comprises compressing the signal at the transmitter and expanding it at the receiv

#The requirement is as follows- There is a signal which is in the range of 0 to 5Hz. This signal frequency composition is to determined. The resolution of the determination is 1Hz.

Explain the 8259 microprocessor. 8259: The 8259A adds 8 vectored priority encoded interrupts to the microprocessor. This can be expanded to 64 interrupt requests with us