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Stray load-losses in a motor vary according to square of the load current; are caused by the leakage flux induced by load currents in laminations and account for 4% to 5% of total losses. What is the way to reduce these losses?
1
By careful selection of slot numbers, tooth/slot geometry and air gap
2
By using thinner laminations
3
By utilising silicon steel laminations of low-loss grade
4
By reducing the heat generated by stator and rotor losses; by using a smaller fan