Answer / dayal varma

universal motor will work in both ac and dc so in dc we
need a commutator

Answer / dileep mishra

universal motor work in both ac and dc so that commutator is
design for this motor. in dc motor commutator is use only
for direction.

Answer / gaurang

commutator is use to facilate the collection of current, so that we can use this electrical energy for our purpose. And commutator reversing the direction of current across one half of the pole and further reverses across another half of the pole so that we can get AC current or voltage.

Dear Sir, we met a disaster with our 62.5 kva genset, after rewinding we informed by our contract engg that due to return current coming in neutral & impropper earthing this happend. But after all set up & load balance we checked & found again we have about 20 to 32 amp return current on neutral. we have 12 airconditioner + 12 mini fridge on single phase line. Pl suggest any idea to solved this problem

3 Answers  

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why transformer cannot rotate though the princplebehind induction motor is similar to a transformer?

2 Answers   GE,

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why rating of motor in HP ?

2 Answers  

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Why positive terminal of DC 48V was earthed?

1 Answers  

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What is harmonics in AC waves. How it is generated? How it will effect the system network? how can eliminate it?

2 Answers  

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what is diffrances between fuse and breaker protection? which one is best?

2 Answers   Essar,

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Im designing APFCR Panel for 600 KVAR.I need to calculate the full current so that i can choose the capacity of isolator/Breaker.Kindly suggest with formula.

1 Answers  

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what is the safety of ACB & VCB and how can this work and how can the service the ACB & VCB parts name with picture

21 Answers   ABB, ACB, Bharti, Claris Lifesciences, Honda, L&T, RotoPower, Sterling Wilson, Wipro,

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Dear All, Pls let me know about ELR.... CBCT is using for singnal purpose... How it works.. any body can explain pls.......

4 Answers  

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insulators advantage in transformer yard?

1 Answers  

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which type motor r use in the celling fan.....

6 Answers  

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How the main bus bar rating of 400kV switchyard with one and half breaker scheme is calculated.

2 Answers  

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