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How to manage run-away issue for dc shunt motor in industry?

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How to manage run-away issue for dc shunt motor in industry?

(a) By using PMDC  motor

(b) By using constant field motors

(c) This can not be avoided

(d) None of the mentioned

I had been asked this question by my school teacher while I was bunking the class.

The question is from Permanent Magnet DC (PMDC) Motors in division DC Motors of Electrical Machines

1 Answer

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Right answer is (a) By using PMDC  motor

For explanation: A PMDC motor can be used to replace the dc shunt motor in industries as they have quite identical characteristics.

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