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What is the advantage of the grain oriented steel laminations?

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What is the advantage of the grain oriented steel laminations?

(a) it lowers the iron loss

(b) it lowers the core loss

(c) it lowers the heating effects

(d) it lowers the harmonics

I had been asked this question by my college professor while I was bunking the class.

My doubt is from Construction of Turbo-Alternators in division Design of Synchronous Machines of Design of Electrical Machines

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Correct option is (b) it lowers the core loss

Easy explanation: The grain oriented steel laminations are also one type of laminations used for the stator core. They result in the lowering of the core loss.

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