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we know that dc motors are more superior then three phase
induction motors in torque generation though they are not
much used in industries why?
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Answer Posted / qureshi majid ahmed
The dc motors are not much used in the industrry because we
need every time the commutator to convert internally
generated AC voltage into dc voltage.For large scale
industries we can not accomodate commutator in this range.So
even having robust characteristics,they are not preffered
for large machines
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