Answer / vijayan

The core is laminated to minimize the eddy current losses
in ac circuits. The voltage applied in dc machine is dc,so
there is no eddy current losses, no need of laminations.

Answer / raja

I support answer 1. But in detail. The flux in the stator of
DC machine (Yoke, poles) is not a time varying one. So it
can't produce any induced emf in those structures. In turn
there is no possibility to have eddy current. And since
there is no reversal of pole there is no possibility of
hysteresis loss also. In turn there is no need to laminate
the core.

Answer / althaf

the voltage induced in the armature conductors is ac,even though it is a dc machine.so the core is to be laminated

Answer / s.sakthivel

(1) to develop the residual magnets


(2) it is act as a permanent pole compare then AC supply pole so we are not laminated stater pole

(1)The demand for electricity , the amount of renewable generation available, the amount of fossil fuel generation available and the cost of the fossil fuel generation are shown in table below period(hrs) demand(MW) renewable (MW) fossil- fuel(MW) cost of fossil fuel(MW) 00.00 - 01.00 2000 1800 2000 30 01.00 - 02.00 2300 2500 2000 30 02.00 - 03.00 2500 2700 2100 45 03.00 - 04.00 2900 3100 2100 50 04.00 - 05.00 2700 2600 2500 45 05.00 - 06.00 2400 2000 2700 50 06.00 - 07.00 2200 1800 2000 36 07.00 - 08.00 2100 1600 2000 36 Assuming that the renewable generation incurs zero cost, determine an optimal generation schedule(specifying the amount of renewable generation and fossil fuel generation used in each period, the cost for each period and the overall cost for 8 hours.)

0 Answers  

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2 Answers  

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0 Answers  

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1 Answers  

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