I am very interested in trying this out on my friction drive project (https://sites.google.com/site/commuterbooster/) and would love to be a beta tester.
justin_le wrote: The yellow wire for getting the speed from the motor hall signal (which is usually not connected in the CA-DPS) would be instead attached to the 5V bus of the CA, as the RC controllers seem to require 5V on the servo input line in order to work.
justin_le wrote:For those who've played with and dissected RC controllers, do they typically have a visible or accessible shunt resistor you can see on the ground return line for the current sense? Even if not it wouldn't be too hard to put a ~1mOhm shunt resistor right where the - battery lead connects to the board and use that.
rodgah wrote:I would be interested in it for sure!
Most people using HV160 controllers I think may be a little over the rated currents of the standard CA shunt....no biggie just as long as you can still adjust the R value in the custom RC firmware. But as discussed earlier it isnt really the battery currents that need to be limited but the phase currents.
though it might kick the bike out from under me if I were to put on a few hard pushes only to open the throttle a fraction and have 7kw+ burst out without me ready for it when it hit the speed.
Just the throttle run thru the CA is enough to make me want to buy it so Im sold on atleast 3 maybe more.....oh and will it support 0-5K resister type throttles(magura)?
justin_le wrote:Does anyone know if the RC controllers work such that the input servo pulse width directly controls the motor mosfet duty cycle?
etard wrote:I hope one day we will have a computer that will be able to monitor everything from motor and controller temps and adjust powering accordingly, maybe even program routes in and it will tweak itself to assure arrival at destination without dead batteries. If it was also a BMS that allowed high power charging that would be bonus. And if it interfaced with an iPhone app as the display oh man, ebike heaven!!
GGoodrum wrote:most RC controllers have BECs that provide +5V to the radio receiver
This would be awesome! It just has to work with only 50v but up to 200a.
AussieJester wrote:Definitely will buy one when available or happy to buy now? & instal immediately and test on my RC 2 speed cruiser!? i was
in the market for a CA seeing the Turnigy mod i did has not worked well, shall hold off on buying anything until
this is available now, top work Justin you RoXz!This would be awesome! It just has to work with only 50v but up to 200a.
Uhm...needs ALOT more than 200amp i have recorded 280amp on data logging with the hv160
i know Rodgah and Recumpence both have higher current draws also
adrian_sm wrote:I have only worked with RC ESC that have integrated BEC (Battery Elimination Circuit) that provides 5 or 5.5V. So we may need to be careful about a plug and play cable that connects this to the CA 5V.
adrian_sm wrote:justin_le wrote:For those who've played with and dissected RC controllers, do they typically have a visible or accessible shunt resistor you can see on the ground return line for the current sense? Even if not it wouldn't be too hard to put a ~1mOhm shunt resistor right where the - battery lead connects to the board and use that.
I don't believe all the controllers have a shunt, at least I couldn't find it on this controller I have in bits in front of me. I will inspect it further and a few others I have in a few days time.
Ypedal wrote:I do not understand the technical reason for this but it seems that limiting current to sensorless controllers is a bad thing, my RC bike is using one of Fechter's throttle boxes that also provides extra capacitors but i had to disable the throttle limiting to prevent the controller from surging at high power levels.. ( might be a problem on the throttle box design.. i really don't know ) ..
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