Recent content by georgeycc

hi there, I am looking for battery system solution for my up coming e-scooter conversion, rough target in mind is 100V/100A battery. What's the recommend battery system with pack/bms/charger solution that's easiest to get and maintain? I am thinking of stacking two high-discharging 48V...

a hint of update? $625 is more aligned with Astro3220 now 8)

thanks Gary! a group buy would be great :)

was wondering if anyone tried Neumotor's 44xx series? it's listed at $525 for 4410, sounds like a comparable compete against 3210/3220? http://www.neumotors.com/Site/Motor_Price_List.html

the inductance of the motor is directly proportional to the number of turns. for instance, a 8-turn 3220 would have double the inductance of that of a 4-turn 3220. is Bob talking about a low-turn 3220/3210?

i am in one of the few 1st group buy orders that haven't been shipped. mine is a 3220/7-turn/6-wire/double shaft. it's been 4 months since the group buy was formed so i started to worry, maybe i am too anxious :oops: actually i saw the other order that has the exact same configuration been...

hi Matt, i am a bit confused, is it $50 or $20 for double shaft? :mrgreen:

hi Matt, payment sent for a 3220 7-turn/6wire/double shaft/black-anodized (550+10+50)*1.04=644.8 thanks a lot! -georgeycc

hi Matt, how much more for 3220 if i want the shaft to be 10mm and longer/stretching out from both ends instead of one end? my config will be 3220/7turn/6 wires/10mm shaft/shaft stretching out both ends/black can please let me know thanks, -george

would buy a 3220 at $550 (can i ask for all 6 wires out?) is there updates on the sensor board? thanks

looks like i am not qualified either :mrgreen:

i have a ebay "mystery pentium 100A" controller in hand so i also took a look of it's make. interestingly i found that how they rate the current capacity is very different to the Turnigy ones. for this Turnigy 40A, it has two mosfets per phase, per switch. each mosfet is rated "absolute max 20A...

Luke, what's the glue you're using to attach 4110's to the heatsink? how well is the insulation?

that Vcc is actually 12V bootstrapping supply that comes from this: ======= ST662A Series DC-DC Converter For Flash Memory Programming Output voltage: 12V +/- 5% Supply voltage range: 4.5V to 5.5V Guaranteed output current up to 30mA Very low quiescent current: 100mA Logic-controlled...

hi Gary, did you find good spots for the sensors?