Answer / vinod

Actually for DC machines input was AC Voltage (alternating in nature) so the output was also absolutely in AC. So we need to give the output in DC, that's why we use COMMUTATOR as a MECHANICAL RECTIFIER.
(Simply) COMMUTATOR is used to convert AC into DC like a RECTIFIER

Answer / dileep

commutator converts i/p DC of the motor to AC in the rotor
i.e armature .so here it is acting as an inverter ........
it acts as a rectifier in the case of DC generator

Answer / madhupriya

The purpose of commutator in dc motor is that it provides continuous unidirectional torque for the rotor to rotate

why EMF IS INDUCED IN A CONDUCTOR WHEN FLUX LINKING WITH IT CHANGES ACCORDING TO FARADAYS LAW.

0 Answers   Sail,

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What is the capacitance values of 132,220,400 & 765 kV current transformer

0 Answers  

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plz tell me in detail about c.t. and p.t. ?

3 Answers   Reliance, SCL,

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what are the safety in transformer,diesel generator,ups, chiller plant,h.t. , L.t. , sewage treatment plant(stp),water treatment plant(wtp), fire. plz ans. me in detail if you know any of the mention above. i urgently need

2 Answers   Claris Lifesciences, EFS,

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is that any software calculator to calculate the size of cable

0 Answers   JSW,

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why 3 phase motors are preferable over single phase motors ?

4 Answers  

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how to decide the capacity of accl

0 Answers  

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for opening electrical shop, tips needed.

0 Answers  

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what is negative and zero impedance in 3 phase induction motor ??

0 Answers  

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The maximum demand of consumer is 2 kW and his daily energy consumption is 20 units. Its Load Factor is (1) 10.15% (2) 41.6 % (3) 50 % (4) 60%

2 Answers  

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Why do we require transformer with less specific weight if supply frequency is increased?

0 Answers  

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How to calculate the multiplying factor for energy meter with ct ratio given

0 Answers  

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