So now he bumped up the fets to 100V (I have fet spec sheet)
I also suggested he install a potentiometer so as to make a variable cut-off between (29 and 59V). He is actually designing this now.
Also working on 72V 40 and 50 amp versions using the 4110 fets.
lazarus2405 wrote:with a pot for an adjustable current limit
Just got in the door and such a great response.
I can address all these inquires (and I will) but please realize that this forum now controls the process. The manufacture(s) are now finally "getting it". WE ARE IN CONTROL.
Basically everything and anything is very possible (IMO). This is the way it should be after all. Yes?
PS The days of $200 controllers ARE OVER!!! We live in an international community and all we need do now is ASK FOR WHAT WE WANT!
-Cheers and much more to say.
yah I'm from New York... my friends call me Knuckles (long story)
The 100v, 4110 units will sell like hot cakes.
lazarus2405 wrote:yah I'm from New York... my friends call me Knuckles (long story)
Uhoh... That sounds threatening....
I am a man of peace (OK I'm a knucklehead)The 100v, 4110 units will sell like hot cakes.
Indeed. Ebikes.ca can't keep them in stock at $300 apiece. As long as these controllers are just as good, you can sell them for less in greater quantities.
drewjet wrote:Sweet! When will you have them available, and best guess on price?
lazarus2405 wrote:Well, first off, welcome! Everyone has something to contribute, even if it's just "that looks nice!" and "this is my ride...". Glad to have you.
Second off, that is absolutely wonderful! We only very recently have decent stock controllers from Crystalyte (4110 FETs, etc) through ebikes.ca, but supplies are very limited and they're pretty expensive. So, the need really, really is there.So now he bumped up the fets to 100V (I have fet spec sheet)
Mind sharing it? What FET model? What about the on resistance? How much continuous current?
The original 72V controller he made uses 75NF75 mosfets (see datasheet.pdf attached). He then proposed this fet (150V - cool - Fairchild__FDP2532.pdf) but got freaky on cost and settled on this fet (456-25859-0-STW80NF10.pdf). This is the fet he is using on the 10 new units he is making for me. I checked all the caps in the existing 72V controller (dissectedthe sucker) and they are all rated at 100V (thank God) and will send pics and specs on these also.I also suggested he install a potentiometer so as to make a variable cut-off between (29 and 59V). He is actually designing this now.
Wonderful! However, can you ask him to make the cutoff range wider? Since different people use such a wide range of packs and voltages, the wider the better.
Can you also see if he can add a pot to adjust the current limit?
What I will suggest is that crazy dude join this forum. He is gonna freak once I send him the link to this. YOU ARE ALL his design team!!!Also working on 72V 40 and 50 amp versions using the 4110 fets.
Nice. In these, how many FETs are planned? And what about the capacitors? They need to be 100v rated, and as big as possible on the high-amp units.
Always a minium of 12 fets. No more crystalyte 6 fet blunders!
There is a market for even higher power hot-rodded controllers. If you could work with him for something that could run in the 50a-80a range, with a pot for an adjustable current limit, and willing to operate at a 100v battery voltage, for the folks making high-powered setups.
There might also be a market for 150v-equipped controllers, maybe 5-10 units. There are a folks running in the 90v-150v range, some on the 4110 FETs and some on 150v FETs. The 4110s are okay under ~115v, but its a knife-edge there. It might be too far out of the mainstream, though. (I'd sure buy one.)
WOW! 150V at 80 amps will fry you if you are not carefull. VERY SCAREY! We are talking serious EV design for anything above 72V nominal!
And finally, can the connectors and wire colors be standardized with Crystalyte motors/controllers and ebikes.ca's connectors? That is Anderson powerpoles on the battery and motor phase wires, mini-XLR for the Hall sensor connectors, and, perhaps, a 6-pin connector for the CycleAnalyst? (specific info can be found on ebikes.ca's site. They'll work with you.)
So, thanks again. Let me know what's realistic and what isn't.
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