The usual lamination thickness selected to minimize the eddy current loss in rotor is _____________(a) 0.1 mm to 0.2 mm(b) 0.3 mm to 0.4 mm(c) 0.4 mm to 0.5 mm(d) 0.9 mm to 0.10 mmThe question was posed to me by my school principal while I was bunking the class.My enquiry is from Losses and Efficiency topic in portion Rating and Loss Dissipation of Electrical Machines

The usual lamination thickness selected to minimize the eddy current l

1.	The usual lamination thickness selected to minimize the eddy current loss in rotor is _____________(a) 0.1 mm to 0.2 mm(b) 0.3 mm to 0.4 mm(c) 0.4 mm to 0.5 mm(d) 0.9 mm to 0.10 mmThe question was posed to me by my school principal while I was bunking the class.My enquiry is from Losses and Efficiency topic in portion Rating and Loss Dissipation of Electrical Machines
Answer» Correct answer is (c) 0.4 mm to 0.5 mm The BEST I can explain: If lamination thickness is made less than 0.4 mm, the reduction in eddy CURRENT losses is achieved, but at the COST of ADDITIONAL labor charges in assembling the rotor.

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