Answer / kalai anand

commutator converters the input diret currenr(DC) to
alternating current(AC) and properly distributes it to each
winding in the armature

Answer / waqas iftikhar

To keep the torque on a DC motor from reversing every time
the coil moves through the plane perpendicular to the
magnetic field, a split-ring device called a commutator is
used to reverse the current every 180 degree at that point.

Answer / amit bhardwaj

In a dc moter comutator distribute the dc to conductor.who coductor row touch b comutator's pich in them flow current and then it genrat tourq

Answer / hitesh

it is true ,commutator converts dc to ac because here we are
applying dc supply and dc has no frequency so it is not
possible production of flux so commutator is required to
convert dc to ac.

Answer / anamika verma

commutator is a mechanical rectifier which converts ac to dc.
when a voltage is generated in armature coils which is ac ,commutator converts it in dc with the help of brushes in gives dc voltage or current.
commutator is always rest on shaft and insulated with it.

Answer / vikram

it converts ac current produced in machien to dc current
so,its also called as mechanical rectifier.
A commutator is a rotary electrical switch in certain types
of electric motors or electrical generators that
periodically reverses the current direction between the
rotor and the external circuit

Answer / abhijeet

commutator convert ac in to dc in dc generators

Answer / pravin sathalpara

dear all friends commutator is not use in dc motor.it is
use in dc generator and its function is ac induce emf
converts into dc emf.

Answer / manreet

Function of commutator in DC motor is to convert AC(alternating current) into DC(direct current).

Answer / rahul kumar

In dc motor commutator helps to convert the DC signal to AC
signal,A segmented of copper sleeve is called a commutator.
As the motor turns, carbon brushes slide over the commutator,
coming in contact with different segments of the commutator.
The segments are attached to different rotor windings,
therefore, a dynamic magnetic field is
generated inside the motor when a voltage is applied
across the brushes of the motor.

what is the working process of over & under voltage relay.

0 Answers   NTPC,

is synchrnous pannel is need for two eqal rating transformers to run in parallel

1 Answers  

how does a current carrying conductor posess a magnetic field. what is the reason for the production of electro magnetic field around the conductor

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What is the use of starter in tube light fitting.how it works.

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conditions for parallel operation of dc generators

4 Answers  

When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<

0 Answers   Lupin,

what is the other name of dc series motor

2 Answers  

Why the isolation treasforfer are connected at out put of the ups ig 200kva ??????????????????

3 Answers  

apti mainly on logical reasoning, verbal and non-verbal ability (70 percent) and remaining technical. I was in ee but technical had mech ques like on turbines and welding.

0 Answers   TATA,

why the manufacturer provide M and C terminals ? why they will not internally short them ?

1 Answers  

How much energy save vfd if motor run on 50 Hz (full speed)

3 Answers   Reliance,

What is the Efficiency in Electric motor ?

2 Answers