Also, if you ever break a contactor with more than 0 amps flowing, you definitely do not want a standard freewheeling diode across its coil. This causes the contactor to open slowly (relatively). All proper EV contactor coil control circuits have both a fast opening kickback suppression circuit as well as an economizer to allow fast pull in, but not high quiescent current which can burn out the coil.
The last circuit I designed had a switchable freewheeling diode that was used only during economizer PWM, and when opening that was switched off, and a TVS to absorb the coil energy, but still allow fast opening. On Thu, Jun 13, 2024 at 4:24 PM paul dove via EV <ev@lists.evdl.org> wrote: > > Thanks, not debating just commenting to what he said. 600A is over the > rating for the part. > Maybe it’s not the issue but I would get a higher rated part. > > Sent from AT&T Yahoo Mail for iPhone > > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20240613/f504711e/attachment.htm> _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
