#1 21670957 05 Feb 2014 10:58 Brittany Blackmon Brittany Blackmon Anonymous Post #1 21670957 05 Feb 2014 10:58 Can anyone tell me why the secondary winding bobbin of an ignition coil in an internal combustion engine always has exactly seven segments?
#2 21670958 05 Feb 2014 15:31 DAVID CUTHBERT DAVID CUTHBERT Anonymous Post #2 21670958 05 Feb 2014 15:31 I found an image of an automobile ignition coil having seven HV winding segments and it shows the segments becoming progressively smaller. http://www.freepatentsonline.com/6575151.htmlI suspect this construction is to mitigate the HV winding-to-core capacitance and maintain an approximately equal winding-to-core voltage gradation along the HV windings.
