What must be done in order to take additional iron losses into account in dc machines?(a) iron loss obtained from iron loss curve is multiplied by 1.2-1.4(b) iron loss obtained from iron loss curve is multiplied by 1.4-1.6(c) iron loss obtained from iron loss curve is multiplied by 1.3-1.5(d) iron loss obtained from iron loss curve is multiplied by 1.15-1.25I had been asked this question during an online interview.Enquiry is from Determination of Iron Losses & Slot Leakage topic in chapter Principles of Magnetic Circuit Design of Design of Electrical Machines

What must be done in order to take additional iron losses into account

1.	What must be done in order to take additional iron losses into account in dc machines?(a) iron loss obtained from iron loss curve is multiplied by 1.2-1.4(b) iron loss obtained from iron loss curve is multiplied by 1.4-1.6(c) iron loss obtained from iron loss curve is multiplied by 1.3-1.5(d) iron loss obtained from iron loss curve is multiplied by 1.15-1.25I had been asked this question during an online interview.Enquiry is from Determination of Iron Losses & Slot Leakage topic in chapter Principles of Magnetic Circuit Design of Design of Electrical Machines
Answer» The correct answer is (b) iron loss OBTAINED from iron loss curve is multiplied by 1.4-1.6 To explain I would say: In ORDER to take additional LOSSES into account the iron loss obtained from the iron loss CURVES is multiplied into 1.4-1.6 in dc machines and SYNCHRONOUS machines. The iron loss obtained from the iron loss curves is multiplied into 1.2-1.4 in induction motors.

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