Answer / sai bhargava

Dc machimes are designed like that angle betwean the stator flux and rotor flux is 90 degree to produce unidirectional torque

Answer / umesh

The torque formula for dc motor is T=k(current * flux)
The commutator with brush converts the dc into ac which produces alternating flux.It means both armature current and flux are positive or negative at the same time.

Explain the propagation of harmonics in the network and influence of phase angle of harmonics.

0 Answers  

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WHAT IS SUBSTATION & ACCORDING TO VOLTAGE HT,EHT SUBSTATION EXPLAIN IT

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What is the avergae difference between OTI and WTI for EHV Power transformer?

7 Answers  

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Sir I hv to fix 20 ton ac how much electrical power need apply?

1 Answers   Sealand Restaurant,

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what is slip ring induction motor? How it works?

1 Answers  

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i am using auto transformer for starting of induction motor to provide reduse voltages...but the principle of a tansformer according to definition"which transform energy to on circuit to another circuit with constant power and constant frequency". so if i am using reduse voltage then current obsely hige because power is same.but we use auto transfarmer for starting of induction motor to give low current.but here according to definition we are giving hige current.

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what is prniciple of three phase IM?

3 Answers  

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Which motor connection is preferable star-delta or delta-star?

0 Answers   IOCL,

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WHY THAT THREE COLORS CHOOSEN IN 3 PHASE? WHAT IS MEAN BY RYB?

2 Answers  

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what's the use of cvt and wave trap in 400kv switch yard.......

5 Answers  

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difference between brush less & brush excitation in a generator?

1 Answers  

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What is function for Load Bank test and why need to test.

1 Answers  

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