Answer / tarun aggarwal ymca

According to this theory, any alternating quantity can be resolved into two rotating components which rotate in opposite directions and each having magnitude as half of the maximum magnitude of the alternating quantity.
In case of single phase induction motors, the stator winding produces an alternating magnetic field having maximum magnitude of Φ1m.
According to double revolving field theory, consider the two components of the stator flux, each having magnitude half of maximum magnitude of stator flux i.e. (Φ1m/2). Both these components are rotating in opposite directions at the synchronous speed Ns which is dependent on frequency and stator poles.

Answer / simon

This theory is applicable in series motor,repulsion motor.It means at one time both +ve,-ve magnet is created by field on armature only.

In track electrification Either we use single conductor or double conductor? why?

2 Answers  

---

why in power staions distriution r like 11kv,33kv,66kv in india?

4 Answers  

---

What is the formula to find out the kvar required to improve the powerfactor from .85 to .99 at 1500kw, 415v.

4 Answers   Trident,

---

What is Skin effect of the cable?

8 Answers   L&T,

---

What is ferro-resonance in electrical system? Why it occurs and what are measures to prevent it?

0 Answers  

---

ratings of lightning arrester

0 Answers   Bajaj,

---

which one is rotating transformer-single phase induction motor or 3 phase squirrel cage motor?

1 Answers  

---

What is the permissible value of earth resistance!

11 Answers   Torrent Power,

---

what is kvarh? Please difine it With calculation

3 Answers   GM General Motors,

---

How can we parallel two transformer with vector gorup YNd11 and YNd1?How is connection two transformer GT?

3 Answers  

---

Can anyone please provide me details of MCCB/Contactor/SFU rating calculations for a motor feeder..for example 50 kw.. not from type-2 cordination chart. i want manual calculations..

0 Answers  

---

differtiate between energy consevation and energy efficiency..

1 Answers   L&T,

---