Q1 -To get proper amount of induced emf. Q2 - It is Speed at which Rsh become the tangent of Eg vs I curve and below that speed we can't get proper amount of induced emf.
1- since there should be proper amount of flux to generate voltage that's why winding should less than critical resistance. 2- because beyond critical speed we would not get proper amount emf.
Since critical resistance produces unstable value or conditions. That's why resistance should be less than this critical value to generate a proper value of flux and induced emf. Critical speed is the speed that should not be operated in generator because this would results to Small value of induced emf which is less than the normal.
1/Above the critical resistance, the generator is not able to build-up voltage because of less flux. 2/Critical speed is that minimum speed in which the generator will not able to develop voltage below it.Like example the rpm of hand-driven megger is 160. Thank you so much sir for your blind support for us.I know sir, you think after these all appreciation why the numbers of student(subscriber) will not increase as per my content and concept or slowly increase. It all about marketing.Don't worry sir after 10 days my exam will over and then I will try to increase the number of students.Ty
Q.1ans.:- The resistance of the DC shunt generator whose critical value must be less than. And this is one of the necessary conditions for voltage buildup in a self-excited generator. Q.2.Ans.:- Critical speed is the rotational speed at which acting dynamic forces cause a machine component to vibrate at its natural frequency.
1 ans. It is the maximum resistance of the shunt field which allows the resistance line or the characteristics between voltage across and current flowing through the shunt field to intersect or coincide with open circuit/magnetic characteristic of a shunt dc generator
1):- Field resistance of aDc shunt generator should be less than critical value 2):- critical speed is the maximum permissible speed above the generator
1.Field resistance of a DC shunt generator should be less than its critical value; this is one of the essential conditions for voltage buildup in the self excited generator 2.Critical speed is the maximum permissible speed above which the generator is likely to damage or may cause the circuit to fail.
very goog explaination of Open circuit characteristics of DC Generator | OCC of DC Generator | Mruduraj
Q1 -To get proper amount of induced emf.
Q2 - It is Speed at which Rsh become the tangent of Eg vs I curve and below that speed we can't get proper amount of induced emf.
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Very useful video on occ of dc generator
yes sir
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1- since there should be proper amount of flux to generate voltage that's why winding should less than critical resistance.
2- because beyond critical speed we would not get proper amount emf.
1) to get a proper emf by the field current.
2) critical speed is that much speed after which we don't get the required emf.
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4:18 sir I have a question? How to find the value of Z,A,Phi
Since critical resistance produces unstable value or conditions. That's why resistance should be less than this critical value to generate a proper value of flux and induced emf.
Critical speed is the speed that should not be operated in generator because this would results to Small value of induced emf which is less than the normal.
True.
Very good
Great job
Thankyou so much
1/Above the critical resistance, the generator is not able to build-up voltage because of less flux.
2/Critical speed is that minimum speed in which the generator will not able to develop voltage below it.Like example the rpm of hand-driven megger is 160.
Thank you so much sir for your blind support for us.I know sir, you think after these all appreciation why the numbers of student(subscriber) will not increase as per my content and concept or slowly increase. It all about marketing.Don't worry sir after 10 days my exam will over and then I will try to increase the number of students.Ty
Both answers are correct
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Sir It is my duty.I always stand with those who are doing hard work with any hope. Because I believe that hard work is luck and luck is everything.Ty
Q.1ans.:-
The resistance of the DC shunt generator whose critical value must be less than. And this is one of the necessary conditions for voltage buildup in a self-excited generator.
Q.2.Ans.:-
Critical speed is the rotational speed at which acting dynamic forces cause a machine component to vibrate at its natural frequency.
1 ans. It is the maximum resistance of the shunt field which allows the resistance line or the characteristics between voltage across and current flowing through the shunt field to intersect or coincide with open circuit/magnetic characteristic of a shunt dc generator
Very useful video on open circuit characteristics of dc generator
I think after increasing resistance above the critical resistance the induced emf is low ,that is not preferred .is this corrct
Right
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Good video
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1This is the essential conditions for voltage buildup in the self excited generator
sir we want video of induction motor in detail
2 ans. e. g. shaft, rotor) to vibrate at its natural frequency
1 ) occ no je graph che tena parthi kbr pade ke critical resistance low che re jyare resistance place kari ane teni tengun line r2 che tena parathi
1):- Field resistance of aDc shunt generator should be less than critical value
2):- critical speed is the maximum permissible speed above the generator
ans :-1 field resistance of dc shunt generator
1). occ નો ગ્રાફ છે તેના પરથી ખબર પડે કે ક્રિટીકૅલ રેઝિસ્ટન્સ લો છે. જયારે resistance plus કરી અને તેની tengun લઈને r2 છે.
2). Critical speed છે n2.
Graph ae speed par hoy che jyare speed low and ane high thay tyare tena graph alag alag thay che
1.Field resistance of a DC shunt
generator should be less than its critical value; this is one of the essential conditions for voltage buildup in the self excited generator
2.Critical speed is the maximum permissible speed above which the generator is likely to damage or may cause the circuit to fail.
Q2=field resistance of dc genetor
Critical speed is (N3)
1Resistance field of dc generatar
fild resistance of dc generator,lessthen critical valu. onof the essential conditin, voltage in the salf exaited ganeretor
Sir there is no hindi vedio
ans:-2 critical speed is n3
critical speed is a N3
Critical speed.N¹.N² ѳ
Very useful video on occ of DC generator