Greentime controllers

[Harold in CR]

24 X 4.1 = 98.4V Just a tad high for a 72V controller, me thinks. ??

 

[knighty]

I'm 90v hot of the charger on my 2.5kw greentime, never had a problem with it

 

[ian.mich]

90V hot is the generally accepted limit to 100V components, but I've been doing quite well charging to 101V on a 18FET 4110. The motor gets blazing hot but this thing won't get warm. He may have had 4410 controller.
Kentlim: you won't reach 80kph without 24S, just sayin'. The v/km/h isn't high enough.

 

[garfong]

I definitely fried it. It was fun while it lasted though. Call me a noob, but I thought 4110s just upped the max current possible and not the voltage (I had 4410s).

 

[ian.mich]

They're both 100V mosfets, but 4110s have more than double the power handling of 44s plus running fewer FETs has better efficiency and power handling. Considering greentime sets its 18fet 4410 controllers at 50A and the 4110 model at 60A, that's a significantly more reliable controller. I get greentime to do 18fet 4110 at 50A controllers for customers.

 

[kentlim26]

im staying at most is 17cells. , and cannot go further that. i feel my bike getting less safer after my top speed reach 64kmh. it cant work on country. it is too obvious and run like motorcycle eg 70kmh , sure chase by a traffic law guys. my next plan is 15cells 20 amps, goal speed is 60kmh most, is safe on road.

 

[ian.mich]

im staying at most is 17cells. , and cannot go further that. i feel my bike getting less safer after my top speed reach 64kmh. it cant work on country. it is too obvious and run like motorcycle eg 70kmh , sure chase by a traffic law guys. my next plan is 15cells 20 amps, goal speed is 60kmh most, is safe on road.

Ya forsure anything above 60 even on a strong bike is really unsafe. Just saying that you need 24S to reach 80kph since your signature says "yet to reach 80km/h, or I will never reached 80km/h ?"

 

[kentlim26]

for the moment,and look likely in the future i will never reach 80kmh. im back to 14cell ~ 17cells more amps looks better . ebikes laws will be changing very fast, they have enforced it.

 

[EdwardNY]

I have a 4410 15fet controller. Are you guys saying if I run 24s and charge it to 98.4 to 99.6volts, or 4.1 to 4.15 volts per cell that I will most likely blow my controller?

If this is the case I do not think this was well pointed out anywhere in this thread.

 

[ian.mich]

I have a 4410 15fet controller. Are you guys saying if I run 24s and charge it to 98.4 to 99.6volts, or 4.1 to 4.15 volts per cell that I will most likely blow my controller?

If this is the case I do not think this was well pointed out anywhere in this thread.

I've sold 15fet 4410 controllers at 24S (charging to 4.1 and 4.15 will not make any difference to blowing it) and theyre still running today fully warrantied. Would i do it again? probably not (for peace of mind i use 18fet 4110 @ 50A) and a few will say that it is death, but even wesnewell is using a lower end model, the huatong, at 100V and his is still kicking.

 

[garfong]

I think if I were to do it again...which I will. I'd just make sure I had a spare controller in case it blows. Now I gotta wait another month before I can ride again.

 

[ian.mich]

should have it shipped via DHL, or have someone on ES mail you a 6FET till then

 

[kentlim26]

have a few more controller is good, no break down time. however all my controllers (spare 5 ) i think is too many. i bought these , i want to have experiment test on different motors .

 

[e-biker]

should I start getting worried it has been 5 weeks and tracking still does not show any movement?

 

[xadmx]

the guy that sells these controllers is terrible to deal with, after sending emails and waiting for days for a reply i still didnt get the info i needed so gave up.
adam

 

[sanford]

the guy that sells these controllers is terrible to deal with, after sending emails and waiting for days for a reply i still didnt get the info i needed so gave up.
adam

Have to say that has been my experience too. Despite wanting to buy two controllers and some other bits, getting a reply took days and multiple emails. And when I did get a reply Leo only half answered what I asked. I gave up too

 

[dnmun]

i wish someone would try one of these with the sine wave type of commutation. at $200 i think this is a value:

http://item.taobao.com/item.htm?spm=a1z10.3.w7686095061.27.9KN0Ag&id=17268439645&

 

[dnmun]

i was looking into the way they did the commutation control and ran across the "spatial frequency vector control algorithm" term and found this paper with google:

http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=1191083&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D1191083

maybe someone has an account that can download the paper, but it is way way over my head. almost.

 

[xadmx]

i wish someone would try one of these with the sine wave type of commutation. at $200 i think this is a value:

http://item.taobao.com/item.htm?spm=a1z10.3.w7686095061.27.9KN0Ag&id=17268439645&

i can't find the shipping option to uk in the shopping cart.
adam

 

[dnmun]

i bet shipping involves a $29 international air freight fee. but it is not a small monster either.

did you consider that other source of sine wave type controllers? they looked identical to this one. just cheaper. a pair of 72V 4kW sine wave type for $250 seemed even cheaper. but that guy did not mention which mosfets they used.

 

[e-biker]

I orderd another controller 2 weeks ago from china and got it yesterday!! Still have seen no movement on greentime controller from Leo. He must of shipped it on a row boat or raft to take longer than 6 weeks. anyway I will not be needing it anymore so I will soon have a 15 fet greentime controller for sale. Well I say soon but who knows with Leo.

 

[rjoe]

i was looking into the way they did the commutation control and ran across the "spatial frequency vector control algorithm" term and found this paper with google:

http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=1191083&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D1191083

maybe someone has an account that can download the paper, but it is way way over my head. almost.

I skimmed the article. It looks like an approximate Krylov subspace method. They say it has application to frequency tracking, but nothing else on the subject.

 

[e-biker]

greentime ripoffs.

 

[kentlim26]

agreed.. bad charger. have you received your controller yet? it cnt be more then two months after you have paid him

 

[ian.mich]

You know hi-power cycles provides pretty much the same chargers as greentime right? they are great chargers.