ngocthach1130 wrote:Hmm today i decided to do some wire maintenance on my bike when i decided to mod the controller while i have it disassemble anyway. I notice the wires on the new crystalyte 72v 35A controller is puny. They're like 14guage wires. I think i'll up them to 12 or 10. As people have stated these are populated with IRF4310 so i'm going to replace them with IRF4110. Someone asked this before about this controller having 6 Mosfet even though it have 12 slots. I did a quick look and i THINK there is gate resistor connection already provided for the unpopulated spot. Anyone have different opinion? Do you think i'll gain any any benefit to adding 6 more? I need to know since i have exactly 6 IRF4110 left from other mod and i'm thinking of ordering more. Don't want to waste time and money is it won't make a diff. Thanks ahead for any reply. BTW it's the white PCB version.
you are certainly better off with twice as many fets, whether they are 4310 or 4110. I have not seen the new controller yet, but i have a couple coming next week.
if you measure with your meter from the empty location's gate pin to the gate of the populated location you should see 20 ohms if there are 2 10 ohm gate resistors installed. i would not recommend mixing the 4310 and 4110, and the 4310 has a higher Miller charge than the 4110 so 2 4310's would need more drive current than 2 4110's, but if they are using the same boost circuit for the high side fets as the older controllers it should be fine with either part. If you are not running at over 50A you might keep the 4310s and just add 6 more of them. With 12 4110's i have quite a few controllers running around now set at up to 85A.
I do not approve of this group any longer and regret what it has become. I could once share ideas here freely that is no longer possible.