Calculate generated emf, copper losses and efficiency., Electrical Engineering

Assignment Help:

Q. A shunt generator gives full load output of 30 kW at a terminal voltage of 200V. The armature and field resistance are 0.05? and 50? resp.. The iron and friction losses are 1000 W. Calculate

   (1) generated emf      (2) copper losses    (3) efficiency

Ans.

 

Given

                                V = 200 V, P = 30 × 103 W,Ra = 0.05 W, Rsh = 50 W

 

                             Pi+f = 1000 W

 

                                  I = P/V = 30 × 103/200 = 150 Amp

 

                                 Ish = V/Rsh = 200/50 = 4A

 

                                 Ia = I +Ish = 150 + 4 = 154 Amp

 

       (a)                      E = V + Ia Ra = 200 + 154 × 0.05 = 207.7 volt

 

       (b)                     Copper losses = Ia2 Ra + Iash Rsh

 

                                                        = (154)2 × 0.05 + (4)2 × 50 = 1985.8w

(c)                   Efficiency ? = Output/ Output + Copper losses + iron losses + friction loss 

 

                   = 30 × 103/30 × 103 + 1985.8 + 1000 = 90.95%

 


Related Discussions:- Calculate generated emf, copper losses and efficiency.

Complete the timing diagram for counter, Q. When the J and K inputs of a JK...

Q. When the J and K inputs of a JKFF are tied to logic 1, this device is known as a divide-by-2 counter. Complete the timing diagram shown in Figure for this counter.

Armature winding, what is use of dummy coil in DC m/c????

what is use of dummy coil in DC m/c????

Explain the hysteresis loop of a magnetic material, Explain the hysteresis ...

Explain the hysteresis loop of a magnetic material. Hystereses loop-Below the Curie temperature all-ferromagnetic materials show the identified hysteresis in the B (i.e. flux

Distribution transformer connection, why the primary bushing of 7970/13.8 d...

why the primary bushing of 7970/13.8 distribution transformer blown up when connected wye on a 13.8 kv source?

Find the voltage gain of the overall circuit, Q. Find the voltage gain of t...

Q. Find the voltage gain of the overall circuit? (a) Consider the circuit of the inverting amplifier shown in Figure (a), including an ideal op amp. Show that the voltage gain

4gls - fourth generations languages, 4GLs (Fourth Generations Languages) ...

4GLs (Fourth Generations Languages) These  are called  non procedural  languages May be considered as  advanced HLL. Objects oriented programming  languages and language  with

States ohm''s law, States Ohm's law Ohm's law describes that the curren...

States Ohm's law Ohm's law describes that the current I flowing in a circuit is directly proportional to the applied voltage V and inversely proportional to the resistance R, g

Define johnson counter to convert serial data, Define johnson counter to Co...

Define johnson counter to Convert Serial Data to Parallel Data? A microprocessor-based or computer system commonly requires incoming data to be in parallel format. But often t

Application of microprocessors , Application of Microprocessors Microp...

Application of Microprocessors Microprocessor microcontroller based systems  may be used  in almost  every filed of life  and  their  applications  are increasing day by day

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