h0tr0d
1 kW
- Joined
- Apr 28, 2012
- Messages
- 460
I've done some simulations to increase the "survivability" of my Kelly @ 350A.
Bought this one: http://kellycontroller.com/kbl96351e24-96v350abldc-controllerwith-regen-p-1258.html
350A for 30s
140A continuous
I need about 350A for around a minute, so my thermal engineering knowledge comes in handy.
Simulations (60s @ 1200W losses in the MosFET's and 250W @ caps, 30s no heat):
Some results in ºC = Y axis, "measured" at the Mosfet-aluminium surface (the Mosfet's internal temperature will significantly higher)
(please ignore the X axis, temperature peak is at 60s):
View attachment 1
Enjoy and tell me your thoughts...
Bought this one: http://kellycontroller.com/kbl96351e24-96v350abldc-controllerwith-regen-p-1258.html
350A for 30s
140A continuous
I need about 350A for around a minute, so my thermal engineering knowledge comes in handy.
Simulations (60s @ 1200W losses in the MosFET's and 250W @ caps, 30s no heat):
- Original controller = OC
OC + two 80mm fans and lots of holes
OC filled with water (after dipping the controller in varnish)
Controller with copper bars glued to the alu angle profiles inside the controller = EC
EC + Oil
EC+ Water
Some results in ºC = Y axis, "measured" at the Mosfet-aluminium surface (the Mosfet's internal temperature will significantly higher)
(please ignore the X axis, temperature peak is at 60s):
View attachment 1
Enjoy and tell me your thoughts...