TopCat wrote: bzhwindtalker wrote:
I think that the hobbyking SS-190/200 is worth something in our applications, it handle some serious power nicely! Quite cheap too, 25euros delivered. The drawback is that you have to stick with low voltage, but that makes gearing and battery balancing easy! I only have 1hour of run time on it, so i may be a little optimistic
Is this the type of ESC your using?http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=14500
Im wondering (should I go RC on my next motor buy) would one of these work with an Turnigy 80-100-B 130Kv Brushless Outrunner?
For me I burnt out an HV sentillion 100A and a HV super brain 110A at 22.2v on the 80-100-130 outrunner.
Then I decided that since I was going to retire that bike build altogether, I would get few more (careful) rides out of it by taking my super simple 90-100Amp version out of my custom E-maxx. I got some of those cheap $3.00 self-reseting circuit breakers from my local auto parts store to limit the current to the controller, as I really didn't want to fry it and I intended to put it back into my E-maxx.
So I started with just one 20A circuit breaker, it would pop open easily. Too easily, so I added another one in parallel for a 40A limit, better, but still popped open too often, so I replaced one of the 20A breakers with a 40A, still popped open if I held WOT long enough just to get to top speed, I thought good, but this little 100A super simple ESC still didn't seemed stressed, so after trying two 40A breakers for 80A total and them almost not popping at all, I took the breakers out altogether and no longer had to think about how much current was being pushed through it. BUT,
then the ESC shut off on me after WOT for ~1/4 mile at 35mph+! Without any breakers in the system anymore I thought "well, this ESC finally bit the bullet". But no smoke! Hmmmm, it was super HOT
, so hot the shrink wrap was splitting off of it...then, all of a sudden I hear "beep beep beep be-deep" and I was back on the road!
I went back home and replaced the stock heatsink with a PC CPU heatsink and never had a problem with it no matter how hard I tried...for the few more times I took it out before Finlay retiring the bike. It was the frame I was truly worried about breaking at the wrong time.
It also lost sync with the motor MUCH LESS than either of the more expensive HV ESC's!
Moral of the story: The little 90-100Amp Super Simple ESC survived all that abuse!
Just thought I'd share,
Ebike: Wallmart Genesis frame, unique Lovejoy 2-speed simplified/redundant drive mounted on custom aluminum swingarm conceptualized by me, machined by Thud. Brushless 80-100~100kv w/halls, 16s6p - 59.9v, 30Ah, 1.7+KWh, Fully Loaded Lyen 12 FET 3077 controller w/ Cycle-Analyst, full custom lighting.
Thanks to Justin at ebikes.ca for saving ES!
Ideas and projects by GITech are protected by: http://creativecommons.org/licenses/by-nc-nd/3.0/