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.

what is load which is indicated in power plant generation panel? in any power plant

1 Answers  

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What is the difference between Zero Current Transformer and Core Balance CT ?

1 Answers  

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We have 750KVA DG set, we want to introduce REF relay with 1250/1A,CL PS,Current transformers.The lead distance of 2.5mm copper flexible cable from CT to relay is around 5mtrs.We would like to know the knee point votage(VK) & IM calculion for CT's

0 Answers  

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how to select cable size?

4 Answers  

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For my plant the electricity department charging some amount for t/f losses. May i know what are transformer losses

1 Answers   L&T,

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Sir, plz tell me the relation b/w KW and frequency in Variable frequency Drive?

2 Answers  

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can we find the inductance of a induction motor?

0 Answers   Trident,

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a.c&d.c motor&generator

2 Answers   Vizag Steel,

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what is iron loss?

4 Answers   RRB,

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is any body explain me why return current in three phase power system is less then in a red, yellow, blue phases??? as we know Ir+Iy+Ib=In then why nutral wire has less then phase current????

2 Answers   Bhel, DRIEMS,

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what is the bus bar size of 2700 amp ACB breaker ? and what is the cable size ?pls detailed answer ?

3 Answers  

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what is T P N bus bar

1 Answers  

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