Answer / raghavendra

its not ac series motor but it is the DC SERIES motor which is used for traction and for variable speed mechanisms because of its HIGH STARTING TORQUES. The main applications of this is in train engines

Answer / binod

FOR HIGH TORQUE

Answer / robert d barnett

I'm not really certain that a.c.series motors ARE preferred for electric
traction. It depends on the situation. There are of course, both AC and DC series motors which are virtually the same. The difference is the inductive reactance of the series field when supplied with AC requires design steps to be taken to correct for this phenomenon. The advantage of using AC is the simplicity of the supply system for long distance systems. A transformer could be put on board the locomotive to reduce the transmission voltage (typ 11,000V) to motor voltage. A DC motor is a similar size rail network would require a substation with a transformer and some means of rectification to DC plus the control system and inherent maintenance costs. It's a bit of a simplification but trolley lines and most interurbans were DC and electric railroads were AC.

Answer / pawan thakur

Bcoz of High troque and also ac supply direct given in series ac. Motor in case of dc motor ac. Supply convert in dc.. Is more expensive..nd switching controling handling is easy to Ac.

A 100 MVA transformer may be cooled with?

6 Answers   HCL,

---

what is allowable current flows from phase to ground with out tripping the breaker

1 Answers  

---

what happens if dc supply is given and the remedies for it.

0 Answers  

---

show the single line diagram of star delta starter with single phase preventer

0 Answers  

---

What are the two segments of nyquist contour.

0 Answers  

---

From stability point of view,What(higher/lower) should be the value of inertia constant of rotating machines?

1 Answers  

---

please let me know , we have installed two separate motor for fire fighting system 1) 60 hp and 2) 15 hp the load is 74 AMPS and 20 AMPS then tell me the main power cable in Aluminum will be what thickness , the length is 225 mt from the main utility to fire pump house

1 Answers  

---

what is skin effect?

4 Answers  

---

please give me all the Alarm .Trip ,Safety Relays & Conditions of Chiller mail me on ashokbabunhce@gmail.com

0 Answers  

---

Why is the frequency not changed during transformation of electrical energy in a transformer?

0 Answers  

---

what is destructive and non-destructive testing of welding

0 Answers  

---

What should be the voltage between Neutral and Ground in secondary side of the step down transformer (230 V to 110 V) with no load condition?

0 Answers   Jindal,

---