I have the ODrive 3.6 48V version, running off a 36V battery; I am trying to make it so that a logic level signal will turn the power on and off to the board; in the process I blew a bunch of P-Channel MOSFETS because that initial spark the board has fried them even though they were rated for the current.
Plus I later just measured the ODrive when idle and it was only 30mA so I decided to just leave it on all the time, so I gave up on the MOSFET power board and decided just to use a master power switch.
This is the really weird part though, no matter what switch I use, it will turn on the ODrive for a brief instant and then the ODrive LED will flicker green on and off… I measured the current and it looks like the switch will turn it on the full 30mA and then a second later it drops to about 6mA… and I can’t figure out for the life of me why… if I bypass the switch and just use the power plug to the 36 V battery to plug turn it on, it works fine… it will even work with the switch as long as the switch was on when I plugged in the battery! There is always a spark when I connect the power though. So there must be something about that initial spark that is screwing up the switches… and I have tried different 20A switches of different types and brands
Please help! Any ideas? I have never seen this behavior in any type of circuit I have ever worked with; what switches are you using to turn this thing on and off? I don’t want to keep it plugged into the battery full time.