mwkeefer
1 MW
Metallover,
I don't know what type of power your pulling but I have seen many people do this with a relay and a dpdt switch, there are even some nifty automatic timed circuits out there.
I'm only suggesting this because then the resistor stays mounted, you connect your power plug to the pack with the switch in the pre-charge mode... then when your ready to go, flip the switch and engage the relays (however many you need to isolate VCC at your voltage / current).
Personally I have a small circuit based on a 555 timer IC which handles my pre-charge delay and then engages a pair of automotive SPDT relays (wired in parallel) on VCC... normally closed runs through the precharge resistor (so it's in precharge mode on plug in), flip the power up switch and .... the relays engage the normally open side which then allows the pack VCC to directly pass to the controller.
I've run as much as 62.7v @ 69A through this arrangement with no issues.
Hope it helps!
-Mike
I don't know what type of power your pulling but I have seen many people do this with a relay and a dpdt switch, there are even some nifty automatic timed circuits out there.
I'm only suggesting this because then the resistor stays mounted, you connect your power plug to the pack with the switch in the pre-charge mode... then when your ready to go, flip the switch and engage the relays (however many you need to isolate VCC at your voltage / current).
Personally I have a small circuit based on a 555 timer IC which handles my pre-charge delay and then engages a pair of automotive SPDT relays (wired in parallel) on VCC... normally closed runs through the precharge resistor (so it's in precharge mode on plug in), flip the power up switch and .... the relays engage the normally open side which then allows the pack VCC to directly pass to the controller.
I've run as much as 62.7v @ 69A through this arrangement with no issues.
Hope it helps!
-Mike