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

how we can adjust for three phase motor cold stall time ,hot stall time and thermal register set up?

0 Answers   OPS,

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why d.c. supply is given to the primary side of generator?

4 Answers  

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what is the ckt diagram of a tubelight and is it the simplest ckt of electrical engineering and also the component?

0 Answers  

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whenever a squirrel or a crow gets tangled near the out put of the feild transformer there is a discharge of 440 volts of current through the neutral due to which my appliances blow up causing a huge bang.will the RCCB help in these conditions

1 Answers  

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What is an ideal transformer?

0 Answers  

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Sparking occur when a load is switched off because the circuit has high – a.) Inductance b.) Capacitance c.) Resistance d.) None

3 Answers   Ecil,

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3 Answers  

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3 Answers   ABB,

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How voltage step down is done?

3 Answers   IOCL,

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1 Answers  

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expalanation for 5p10 class.

6 Answers  

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what is the significance of cabability curve of alternator

0 Answers  

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