tag:blogger.com,1999:blog-2270124316233555550.post629369859800692359..comments2023-01-26T20:59:29.216-08:00Comments on Porsche 914 EV Conversion: Taking a BreakTimKhttp://www.blogger.com/profile/09059780797709299125noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-2270124316233555550.post-36676698771896605052007-08-31T14:23:00.000-07:002007-08-31T14:23:00.000-07:00Hi Joe, yes I tried without the regen braking and ...Hi Joe, yes I tried without the regen braking and the DC-DC still blew when I turned on the headlights, brake lights and turn signal (about 20 amps).<BR/><BR/>The 144V pack is definitely isolated from the chassis ground, but the 12V negative terminal is tied to the chassis. The DC-DC is fully isolated through a transformer and optocoupler so there's no current going through there. Cheers. TimTimKhttps://www.blogger.com/profile/09059780797709299125noreply@blogger.comtag:blogger.com,1999:blog-2270124316233555550.post-28529760787586456722007-08-31T08:59:00.000-07:002007-08-31T08:59:00.000-07:00Since it seems to blow relatively quickly (within ...Since it seems to blow relatively quickly (within a day of being fixed); have you thought about disabling the regenerative breaking and seeing if it still goes south?<BR/><BR/>I think you’re on the right path with the missing diodes.<BR/><BR/>On a side note, since I don’t have access to the full system schematics. Do you have isolated signal ground, voltage ground and chasse ground?<BR/> JoeJoehttps://www.blogger.com/profile/06369181655557403740noreply@blogger.com