Answer / iamdon

TWO REACTION THEORY is employed for the analysis of salient
pole rotor synchronous machines.

Blondel is credited for the theory.

Yes,Same theory can be used for the analysis for
cylindrical rotor synchronous machines also.Actually
salient pole rotor is a general case where as cylindrical pole
rotor is special case.

In case of salient pole, the air gap is not same with respect
of time.So rotating field faces different reluctances.The gap
is minimum in polar region and is maximum in interpolar region.
By Two reaction theory we break the rotating field along two
axes namely
1)Direct axis and
2)Quadrature axis.
The advantage of the breaking is that the air gap became fixed
(so the reluctance) along both axis seperately with respect of
time.So analysis become quite simpler.

Author:arbelectbit@yahoo.com

why do we need a 4th wire in 3phase 3wire transmission line

6 Answers  

---

Under Ground Power cable earthing is required at both end or single end? and reason for the same

3 Answers  

---

why it is necessary to short and ground of a current transformer secondary side?

6 Answers   Ambuja,

---

In DC while we mention the voltage we are using -48V but in case of AC we mention only 230V not -230V, why we using -48V not 48V

2 Answers  

---

armature winding of dc machine produce alternating emf then it convert in to dc by using commutator.But only we consider armature resistance why don't we consider inductive reactane effect?

0 Answers   APTransco,

---

hi frienda We have 250kva cater pillet dg set we are fasing one diffrent proublam in dg we are start dg set after one mint applying load around 450a load but dg was run 3 Or 4 mints after 3 mints dg was shuding down automatic how to face this proublam pls tel any budy

2 Answers  

---

hi pal, i am vengatesh from tamilnadu(chidambaram),i have called for the written test for the post of jr executive(ELECTRICAL) of AAI ,I dont know about the question paper pattern,so any kindly help me to face the examination,post me the model question papers and some tips to write my examination to (vengi.annadurai@gmail.com)

0 Answers  

---

what is the basic construction diffrance between servo motor ans sqiralcage induction motor

0 Answers  

---

Give 3 phase transformer connections for 24 pulse rectifier using thyristors.

0 Answers  

---

What are the fire Estingushers use in electrical fire?

3 Answers  

---

how to check three phase motor torque value?

0 Answers   Apollo,

---

how to do the ductor test?

0 Answers  

---