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.

xplain in detail d pr. of synchronous motors? why syn. generators r used for the production of electricity?

4 Answers  

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how we can varying the speed of dc motor ?

6 Answers  

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What should be the setting of an earth fault relay.

2 Answers   HP,

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what will happen if ac power supply is given to the rotor of an alternator

1 Answers   Goldman Sachs,

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What are the main parts of central chiller plant? Explain the function of each stage.

0 Answers   HSL, Shankar Electricals,

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sir i have applied for isro-09. still i did not got the HALL TICKET.

2 Answers  

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why T/F winding temp measurement cts are odd secondary current ie,109A/1.2A/1.4A?

0 Answers   MSETCL Maharashtra State Electricity Transmission Co Ltd,

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What can you contribute to the progress of our Company as an employee if you are selected?

0 Answers  

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My load is 15 kw,i want to improve power factor from 0.8 to 0.9,how select capacitor

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HI FRIENDS,MYSELF & MY GROUP OF FINAL YEAR ELECT ENGG. ARE MAKING A 50/3HZ,5HP,1000RPM,440V SALIENT POLE SYNCHRONOUS GENERATOR.COULD ANYONE OF U TELL ME WHAT COULD BE THE ADV. & DISADVANTAGES OF MAKING SUCH A LOW FREQN.GENERATOR/

2 Answers  

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how desiel generate sart fail of eb?

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what is neutral grounding? why is it required? what is neutral grounding resistor and how is its value calculated??

11 Answers   NTPC, ONGC,

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