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What happens when dc shunt generator winding turn off during work?

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Question ajoutée par ZAHEER ABBAS , Admin & SCM Manager , ZEDCO Pakistan
Date de publication: 2016/02/09

If the field is opened ( a dangerous operation in itself,, because of high voltage due to Lf dif/dt) .. the armature Votage ( back emf will collapse) and armature current will rise as given by Vapp = Ka dia/dt +Ra*ia +vback(due to remanent magnetism ) with ia=ia0 at no load. The motor decelerates due to friction and windage .

The torque due to remanent magnetism will not be significant.

mustafa محمد صادق السيد
par mustafa محمد صادق السيد , Electrical Engineer , rmc

I think that the Output voltage will lose and the generator will overheated

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