Answer / iamdon

Generally the field winding is placed on rotor but it can
be placed on stator, without loss of generality however
such arrangement has limiataions.

Rotating armature type synchronous machines:

DC Field winding is placed on stator where as AC armature
winding is placed on rotor.The electrical input(in case of
motor)and output(in case of alternator)is supplied to or
taken from rotating armature respectively by means of
brush.The brush cann't be employed satisfactorly for large
ratings.So this arrangement is lmited for small rated
machines only.

Rotating field type synchronous machines:

DC Field winding is placed on rotor where as AC armature
winding is placed on stator.The electrical input(in case of
motor)and output(in case of alternator)is supplied to or
taken from stationary armature respectively.This
arrangement is suitable for large rating because it is
relatively easier to design insulation for stationary
armatrure as compared to rotating armature.

Author:arbelectbit@yahoo.com

Answer / sudheer

The other disadvantages are for large rating of machine
lage amount of winding is required hence if armature is
rotating large mechanical input is required to drive prime
mover and there may be large frictional losses mechanical
losses and machine must be capable of withstanding large
amount of centrifugal forces.

power 148kw i need exat cable size in 148 kw in 3phase what size of cable can i used.

3 Answers  

---

wat is the current produced in a 5000v megger? when the positive and negetive terminals are touched on our body get s shock?

0 Answers   FLS,

---

please I wont know how to calculate the vector group for power transformer ZNyn11 best regard.

0 Answers   Al Rasikh,

---

what happens when a power transformer neutral earthing broken???

11 Answers   MacLellan,

---

what are earthing material

1 Answers  

---

What is the difference between MCCB & ACB Where it can be used

5 Answers  

---

why do we require two lines one phase and a neutral for an ac transmission..is neutral potential zero..?if yes y carry a neutral line from generating station itself...why dont we take it from ground

1 Answers  

---

why do we earth the tandelta point of a power transformer bushing?

1 Answers  

---

As per standard, transformer body earthing and other Equipment earthing (Equipment earthing) did not connect. but in LT side termination we are doing metal glanding in both side Transformer to PCC Panel through armoured cable, now X'mer body earthing and PCC Pane earthing (Equipment earthing) both are connect.is this safe for X'mer or other equipment?

0 Answers  

---

difference between torque mode and speed mode

4 Answers   JSW,

---

how do i commission a distribution transformer knowing all its ratings and transformation ratios?d

1 Answers  

---

What is an ideal transformer?

0 Answers  

---